/* ═══════════════════════════════════════════════════════════════
   StudyMate Platform Styles v3.0
   PALETTE (exactly 6):
     1. --blue     #1a56db  (primary actions, links, accent)
     2. --blue-dark #1139a0  (hover states, sidebar, headers)
     3. --blue-pale #eff4ff  (pale backgrounds, tags, badges)
     4. --ink      #111827  (text)
     5. --muted    #6b7280  (secondary text)
     6. --white    #ffffff  (surfaces, cards, backgrounds)
   Supporting neutrals (not counted as brand colors):
     --line      #e5e7eb  (borders)
     --paper     #f8faff  (page background – near-white with blue tint)
     --shadow    0 4px 24px rgba(26,86,219,.08)
═══════════════════════════════════════════════════════════════ */

:root {
  --blue:       #1a56db;
  --blue-dark:  #1139a0;
  --blue-pale:  #eff4ff;
  --blue-mid:   #3b82f6;
  --ink:        #111827;
  --muted:      #6b7280;
  --line:       #e5e7eb;
  --paper:      #f8faff;
  --white:      #ffffff;
  --success:    #16a34a;
  --warning:    #d97706;
  --danger:     #dc2626;
  --shadow:     0 4px 24px rgba(26,86,219,.08);
  --shadow-lg:  0 12px 40px rgba(26,86,219,.14);
}

/* ── RESET ── */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:14px 'DM Sans',sans-serif;line-height:1.5}
button,input,textarea,select{font:inherit}
button{cursor:pointer;border:0;color:inherit}
a{text-decoration:none;color:inherit}
[hidden]{display:none!important}

/* ── ANIMATIONS ── */
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
@keyframes typingBounce{0%,80%,100%{transform:translateY(0);opacity:.4}40%{transform:translateY(-6px);opacity:1}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}
@keyframes scaleIn{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}

/* ── UTILITIES ── */
.eyebrow{font-size:10px;text-transform:uppercase;letter-spacing:1.4px;color:var(--blue);font-weight:700;margin:0 0 10px;display:block}
.lede{margin:0;color:var(--muted);font-size:14px;line-height:1.6}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--success);display:inline-block;animation:pulse 2s infinite}
.online-dot{width:7px;height:7px;border-radius:50%;background:var(--success);display:inline-block}

/* ── BUTTONS ── */
.button{
  border-radius:8px;padding:11px 18px;font-weight:700;font-size:12px;
  display:inline-flex;align-items:center;gap:8px;
  transition:transform .18s,box-shadow .18s,background .18s;
  cursor:pointer;border:0;position:relative;overflow:hidden;
}
.button::after{
  content:'';position:absolute;inset:0;background:rgba(255,255,255,0);
  transition:background .15s;
}
.button:hover::after{background:rgba(255,255,255,.1)}
.button:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.button:active{transform:translateY(0);box-shadow:none}
.button-dark{background:var(--blue);color:#fff}
.button-dark:hover{background:var(--blue-dark)}
.button-light{background:var(--white);color:var(--blue);border:1.5px solid var(--blue);padding:10px 16px}
.button-light:hover{background:var(--blue-pale)}
.button-quiet{background:transparent;color:var(--blue);padding:10px 14px;border:1.5px solid var(--line)}
.button-quiet:hover{border-color:var(--blue);background:var(--blue-pale)}
.button-ghost{background:transparent;color:var(--muted);padding:10px 14px;border:1.5px solid var(--line)}
.button-ghost:hover{color:var(--ink);border-color:var(--ink)}
.text-button{font-size:12px;color:var(--blue);font-weight:700;background:transparent;padding:0;cursor:pointer;border:0;transition:opacity .15s}
.text-button:hover{opacity:.75}
.text-button span{font-size:15px;vertical-align:-1px;margin-left:3px}

/* ── PANELS / CARDS ── */
.panel{
  background:var(--white);border:1.5px solid var(--line);
  border-radius:12px;box-shadow:var(--shadow);
}
.panel-dark{
  background:var(--blue-dark);color:#fff;
  border-radius:12px;box-shadow:var(--shadow-lg);
  padding:24px 26px 20px;min-height:170px;
  display:flex;flex-direction:column;justify-content:space-between;
  overflow:hidden;position:relative;
}
.panel-dark::after{
  content:'';position:absolute;width:220px;height:220px;
  border-radius:50%;border:1px solid rgba(255,255,255,.1);
  right:-60px;top:-100px;
  box-shadow:0 0 0 30px rgba(255,255,255,.025);
}
.card-topline{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:1}
.light{color:#a8c4f5}
.verified{font-size:10px;color:#86efac;border:1px solid #4ade80;border-radius:20px;padding:4px 9px}

/* ── TOAST ── */
.toast{
  position:fixed;left:50%;bottom:28px;
  background:var(--ink);color:#fff;
  border-radius:8px;padding:12px 18px;font-size:13px;font-weight:500;
  box-shadow:0 8px 28px rgba(0,0,0,.2);
  transform:translate(-50%,20px);opacity:0;pointer-events:none;transition:.28s;z-index:999;
  display:flex;align-items:center;gap:10px;max-width:90vw;
}
.toast.show{transform:translate(-50%,0);opacity:1}
.toast-icon{font-size:16px}

/* ── BRAND ── */
.brand{
  display:flex;align-items:center;gap:10px;color:var(--ink);
  text-decoration:none;font:700 20px 'Space Grotesk',sans-serif;margin:0 13px 36px;
}
.brand>span:last-child span{color:var(--blue)}
.brand-mark{
  background:var(--blue);color:white;border-radius:9px;
  width:30px;height:30px;display:grid;place-items:center;
  font:700 17px 'Space Grotesk',sans-serif;transform:rotate(-8deg);
  flex-shrink:0;
}

/* ── AVATAR ── */
.avatar{width:35px;height:35px;border-radius:50%;display:grid;place-items:center;flex:0 0 auto;font-weight:700;font-size:11px}
.avatar-auto{background:var(--blue-pale);color:var(--blue)}
.avatar-small{width:32px;height:32px;border:2px solid var(--white);box-shadow:0 0 0 1.5px var(--line)}
.post-avatar{width:35px;height:35px;border-radius:50%;flex:0 0 auto;background:var(--blue-pale);color:var(--blue);display:grid;place-items:center;font-weight:700;font-size:11px}

/* ── FORM ── */
.form-label{display:block;color:var(--muted);font-size:11px;font-weight:700;margin-bottom:16px;letter-spacing:.3px}
.form-label input,.form-label textarea,.form-label select{
  display:block;width:100%;
  border:1.5px solid var(--line);border-radius:8px;
  margin-top:7px;padding:11px 14px;outline:none;
  color:var(--ink);font-size:13px;background:var(--white);
  transition:border-color .15s,box-shadow .15s;
}
.form-label input:focus,.form-label textarea:focus,.form-label select:focus{
  border-color:var(--blue);
  box-shadow:0 0 0 3px rgba(26,86,219,.12);
}
.form-label input::placeholder,.form-label textarea::placeholder{color:#9ca3af}
.form-label textarea{height:120px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.terms-check{display:flex;gap:8px;align-items:flex-start;color:var(--muted);font-size:12px;margin:4px 0 22px;line-height:1.5}
.terms-check input{accent-color:var(--blue);margin-top:2px;flex-shrink:0}

/* ── MODAL ── */
.modal-backdrop{
  position:fixed;inset:0;
  background:rgba(17,24,39,.5);
  backdrop-filter:blur(3px);
  z-index:50;display:grid;place-items:center;padding:16px;
}
.modal{
  background:var(--white);border-radius:14px;
  width:min(580px,100%);padding:28px;
  box-shadow:0 24px 60px rgba(17,24,39,.2);
  animation:scaleIn .22s ease-out;
  max-height:92vh;overflow-y:auto;
}
.modal-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:22px}
.modal h2{font:700 21px 'Space Grotesk';margin:0;color:var(--ink)}
.close-button{
  background:var(--blue-pale);width:30px;height:30px;
  border-radius:8px;font-size:18px;color:var(--blue);
  display:grid;place-items:center;flex-shrink:0;
  transition:background .15s;
}
.close-button:hover{background:var(--blue);color:#fff}
.modal-footer{display:flex;align-items:center;justify-content:space-between;margin-top:22px;gap:12px;flex-wrap:wrap}
.modal-footer span{font-size:11px;color:var(--muted)}

/* OAuth Confirm Modal */
.oauth-confirm-modal{width:min(420px,100%)}
.oauth-confirm-provider{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:24px;background:var(--blue-pale);border-radius:10px;margin-bottom:20px;
}
.oauth-provider-icon{width:56px;height:56px;border-radius:14px;display:grid;place-items:center;font-size:28px;background:#fff;box-shadow:var(--shadow)}
.oauth-confirm-modal h3{font:600 18px 'Space Grotesk';margin:0;text-align:center;color:var(--ink)}
.oauth-confirm-modal p{font-size:13px;color:var(--muted);text-align:center;margin:0;line-height:1.5}
.oauth-profile-card{
  display:flex;align-items:center;gap:14px;padding:14px 16px;
  border:1.5px solid var(--line);border-radius:10px;margin-bottom:18px;
  background:var(--paper);
}
.oauth-profile-card .op-avatar{
  width:44px;height:44px;border-radius:50%;background:var(--blue-pale);
  color:var(--blue);display:grid;place-items:center;font-size:18px;font-weight:700;flex-shrink:0;
}
.oauth-profile-card strong{display:block;font-size:14px;font-weight:700}
.oauth-profile-card span{font-size:12px;color:var(--muted)}
.oauth-profile-card .op-badge{
  margin-left:auto;font-size:10px;font-weight:700;
  background:var(--blue-pale);color:var(--blue);
  padding:3px 8px;border-radius:10px;
}
.oauth-confirm-actions{display:flex;gap:10px}
.oauth-confirm-actions .button{flex:1;justify-content:center;padding:13px}
.oauth-divider{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:11px;margin:16px 0}
.oauth-divider::before,.oauth-divider::after{content:'';flex:1;height:1.5px;background:var(--line)}
.oauth-permissions{background:var(--paper);border-radius:8px;padding:14px;margin-bottom:16px}
.oauth-permissions p{font-size:11px;font-weight:700;color:var(--muted);margin:0 0 10px;text-transform:uppercase;letter-spacing:.5px}
.oauth-perm-item{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--ink);margin-bottom:6px}
.oauth-perm-item:last-child{margin-bottom:0}
.oauth-perm-item span:first-child{color:var(--success);font-size:13px;flex-shrink:0}

/* ── TAGS / BADGES ── */
.topic-tag{padding:4px 9px;border-radius:5px;font-weight:700;font-size:10px}
.coral-tag,.CYB-tag{color:var(--blue-dark);background:var(--blue-pale)}
.blue-tag,.CSC-tag{color:#1e40af;background:#dbeafe}
.green-tag,.SWE-tag{color:#166534;background:#dcfce7}
.purple-tag,.DSC-tag{color:#5b21b6;background:#ede9fe}
.teal-tag,.MED-tag{color:#115e59;background:#ccfbf1}
.yellow-tag,.BUS-tag{color:#92400e;background:#fef3c7}
.ai-badge{background:var(--blue-pale);color:var(--blue);padding:3px 8px;border-radius:5px;font-size:9px;font-weight:700}

/* ── SOCIAL AUTH BUTTONS ── */
.social-auth-buttons{display:flex;flex-direction:column;gap:10px;margin-bottom:8px}
.btn-social{
  display:flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 18px;border-radius:9px;font-weight:600;font-size:13px;
  cursor:pointer;border:1.5px solid var(--line);background:var(--white);
  transition:border-color .15s,background .15s,box-shadow .15s;
  position:relative;overflow:hidden;
}
.btn-social::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(90deg,transparent 0%,rgba(26,86,219,.04) 50%,transparent 100%);
  background-size:200% 100%;opacity:0;transition:opacity .3s;
}
.btn-social:hover::before{opacity:1;animation:shimmer 1s infinite}
.btn-social:hover{box-shadow:0 4px 14px rgba(26,86,219,.1);transform:translateY(-1px)}
.btn-google:hover{border-color:#4285F4;background:#f0f6ff}
.btn-github:hover{border-color:#333;background:#f5f5f5}
.btn-linkedin:hover{border-color:#0077B5;background:#f0f7fc}
.social-divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:11px;margin:14px 0}
.social-divider::before,.social-divider::after{content:'';flex:1;height:1.5px;background:var(--line)}

/* ── OTP ── */
.verify-screen{
  min-height:100vh;background:linear-gradient(135deg,var(--paper) 0%,#dbeafe 100%);
  display:grid;place-items:center;padding:20px;
}
.verify-panel{
  background:var(--white);border-radius:16px;padding:44px;
  width:min(440px,100%);text-align:center;
  box-shadow:var(--shadow-lg);border:1.5px solid var(--line);
  animation:scaleIn .25s ease-out;
}
.verify-icon{font-size:48px;margin-bottom:16px}
.verify-panel h2{font:700 26px 'Space Grotesk';margin:0 0 12px;color:var(--ink)}
.verify-panel p{color:var(--muted);font-size:13px;line-height:1.6;margin:0 0 24px}
.otp-row{display:flex;gap:10px;justify-content:center;margin-bottom:16px}
.otp-input{
  width:46px;height:56px;border:2px solid var(--line);border-radius:10px;
  text-align:center;font:700 22px 'Space Grotesk';outline:none;color:var(--ink);
  transition:border-color .15s,box-shadow .15s;background:var(--white);
}
.otp-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(26,86,219,.12)}
.otp-input.filled{border-color:var(--blue);background:var(--blue-pale);color:var(--blue)}
.verify-code-hint{font-size:11px;color:var(--blue);font-weight:700;margin-bottom:16px;min-height:16px}

/* ── AUTH SCREEN ── */
.auth-screen{
  min-height:100vh;background:var(--white);
  display:grid;grid-template-columns:minmax(320px,.85fr) minmax(420px,1.15fr);
}
.auth-art{
  background:linear-gradient(160deg,var(--blue-dark) 0%,var(--blue) 60%,#60a5fa 100%);
  color:#fff;position:relative;overflow:hidden;
  padding:clamp(35px,8vw,100px);
  display:flex;flex-direction:column;justify-content:space-between;
}
.auth-art::after{
  content:'';position:absolute;width:500px;height:500px;
  border:1px solid rgba(255,255,255,.1);border-radius:50%;
  right:-200px;top:10%;
  box-shadow:0 0 0 40px rgba(255,255,255,.04),0 0 0 80px rgba(255,255,255,.02);
}
.auth-art p{
  position:relative;z-index:1;
  font:600 clamp(24px,3vw,40px) 'Space Grotesk',sans-serif;line-height:1.15;margin:0;
}
.auth-art p strong{color:#bfdbfe}
.auth-mark{
  width:72px;height:72px;border:2px solid rgba(255,255,255,.3);
  border-radius:18px;display:grid;place-items:center;
  font:700 42px 'Space Grotesk';transform:rotate(-8deg);
  position:relative;z-index:1;background:rgba(255,255,255,.1);
}
.auth-orbit{position:absolute;border:1px solid rgba(255,255,255,.12);border-radius:50%;z-index:1}
.orbit-one{width:180px;height:180px;left:25%;top:18%}
.orbit-two{width:12px;height:12px;background:rgba(255,255,255,.4);left:37%;top:17%;border-radius:50%;border:0}
.auth-art-features{position:relative;z-index:1;display:flex;flex-direction:column;gap:10px}
.auth-art-feat{
  display:flex;align-items:center;gap:10px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);
  border-radius:10px;padding:10px 14px;
}
.auth-art-feat span{font-size:18px;flex-shrink:0}
.auth-art-feat p{margin:0;font-size:12px;color:rgba(255,255,255,.8);line-height:1.3}
.auth-art-feat strong{display:block;font-size:13px;color:#fff;margin-bottom:2px}
.auth-panel{
  width:min(540px,100%);padding:clamp(28px,6vw,80px);
  align-self:center;overflow-y:auto;max-height:100vh;
}
.auth-brand{margin:0 0 44px}
.auth-copy h1{
  font:700 clamp(30px,4vw,48px) 'Space Grotesk',sans-serif;
  line-height:1.05;margin:0 0 14px;color:var(--ink);
}
.auth-copy h1 em{font-style:normal;color:var(--blue)}
.auth-copy>p:last-child{color:var(--muted);line-height:1.6;margin:0 0 28px}
.auth-panel .form-label{margin-bottom:16px}
.auth-options{
  display:flex;justify-content:space-between;align-items:center;
  font-size:12px;color:var(--muted);margin:4px 0 22px;
}
.auth-options label{display:flex;align-items:center;gap:7px;cursor:pointer}
.auth-options input{accent-color:var(--blue)}
.auth-submit{width:100%;justify-content:center;padding:14px;font-size:13px}
.auth-hint{text-align:center;color:var(--muted);font-size:12px;margin:16px 0 0}
.back-link{background:transparent;color:var(--muted);padding:0;font-size:11px;cursor:pointer;border:0;display:block;margin-top:12px;transition:color .15s}
.back-link:hover{color:var(--blue)}

/* ── REGISTER SCREEN ── */
.register-screen{
  min-height:100vh;background:var(--white);
  display:grid;grid-template-columns:360px 1fr;
}
.register-side{
  background:linear-gradient(175deg,var(--blue-dark) 0%,var(--blue) 100%);
  color:#fff;padding:36px 44px;
  display:flex;flex-direction:column;justify-content:space-between;
}
.register-side .brand{color:#fff;margin:0}
.register-side .brand-mark{background:rgba(255,255,255,.2)}
.register-side h1{font:700 40px 'Space Grotesk';line-height:1.05;margin:18px 0}
.register-side h1 em{font-style:normal;color:#bfdbfe}
.register-side p:not(.eyebrow){color:rgba(255,255,255,.7);line-height:1.6;max-width:220px}
.register-side .eyebrow{color:#93c5fd}
.register-quote{font:italic 12px 'Space Grotesk';color:rgba(255,255,255,.5);line-height:1.5}
.register-panel{
  max-width:800px;padding:36px 6vw;
  align-self:flex-start;overflow-y:auto;
}
.register-heading{margin:28px 0 26px}
.register-heading h2{font:700 32px 'Space Grotesk';margin:0 0 8px;color:var(--ink)}
.register-heading p{color:var(--muted);margin:0;font-size:13px}

/* ── APP SHELL ── */
.app-shell{display:flex;min-height:100vh;background:var(--paper)}
.sidebar{
  width:248px;position:fixed;inset:0 auto 0 0;
  background:var(--blue-dark);
  border-right:0;padding:24px 14px 18px;
  display:flex;flex-direction:column;z-index:40;overflow-y:auto;
}
.sidebar .brand{color:#fff;margin:0 8px 30px}
.sidebar .brand-mark{background:rgba(255,255,255,.2);transform:none}
.sidebar .brand>span:last-child span{color:#bfdbfe}
.profile-mini{
  display:flex;align-items:center;gap:10px;padding:12px 10px 22px;
  border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:8px;
}
.profile-mini strong,.profile-mini span{display:block}
.profile-mini strong{font-size:12px;color:#fff}
.profile-mini span{font-size:10px;color:#93c5fd;margin-top:2px}
.icon-button{background:transparent;color:rgba(255,255,255,.5);margin-left:auto;padding:5px;transition:color .15s}
.icon-button:hover{color:#fff}
.primary-nav{padding-top:6px;flex:1}
.nav-label{
  font-size:9px;text-transform:uppercase;letter-spacing:1.5px;
  color:rgba(255,255,255,.35);margin:0 10px 8px;font-weight:700;
  padding-top:18px;display:block;
}
.nav-item{
  display:flex;align-items:center;gap:11px;padding:10px 12px;
  margin:1px 0;border-radius:9px;text-decoration:none;
  color:rgba(255,255,255,.65);font-weight:600;font-size:13px;
  cursor:pointer;background:transparent;width:100%;text-align:left;
  transition:background .15s,color .15s;
}
.nav-item:hover{background:rgba(255,255,255,.1);color:#fff}
.nav-item.active{background:rgba(255,255,255,.15);color:#fff}
.nav-item.active .nav-icon{color:#bfdbfe}
.nav-icon{font-size:17px;width:18px;text-align:center;font-weight:400;flex-shrink:0;color:rgba(255,255,255,.5)}
.nav-item b{
  font-size:10px;margin-left:auto;
  background:rgba(255,255,255,.15);color:#fff;
  padding:2px 6px;border-radius:8px;
}
.nav-item b.unread{background:var(--blue-mid);color:#fff}
.sidebar-bottom{padding-top:12px;border-top:1px solid rgba(255,255,255,.1);margin-top:auto}
.logout-button{color:rgba(255,255,255,.5)!important}
.logout-button:hover{color:#fca5a5!important;background:rgba(220,38,38,.1)!important}
.sidebar-note{padding:14px 10px 0;display:flex;gap:8px;align-items:center;font-size:11px;color:rgba(255,255,255,.4)}

/* ── TOPBAR ── */
.main-content{margin-left:248px;flex:1;min-width:0}
.topbar{
  height:68px;border-bottom:1.5px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 36px;background:rgba(248,250,255,.85);
  backdrop-filter:blur(10px);position:sticky;top:0;z-index:30;
}
.breadcrumb{display:flex;gap:8px;font-size:12px;align-items:center}
.breadcrumb span{color:var(--muted)}.breadcrumb strong{color:#d1d5db;font-weight:400}
.breadcrumb b{color:var(--ink);font-weight:700}
.top-actions{display:flex;align-items:center;gap:12px}
.search-box{
  width:230px;height:36px;border:1.5px solid var(--line);
  background:var(--white);border-radius:9px;
  display:flex;align-items:center;gap:8px;padding:0 12px;
  color:var(--muted);transition:border-color .15s,box-shadow .15s;
}
.search-box:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px rgba(26,86,219,.1)}
.search-box input{border:0;outline:0;width:100%;font-size:12px;background:transparent;color:var(--ink)}
kbd{
  font-size:10px;color:var(--muted);background:var(--paper);
  border:1.5px solid var(--line);border-radius:5px;padding:2px 5px;white-space:nowrap;
}
.round-button{
  width:34px;height:34px;border-radius:9px;
  background:var(--white);border:1.5px solid var(--line);
  font-size:17px;display:grid;place-items:center;
  position:relative;transition:border-color .15s,background .15s;
}
.round-button:hover{border-color:var(--blue);background:var(--blue-pale);color:var(--blue)}
.notification-button i{
  position:absolute;right:6px;top:5px;
  width:6px;height:6px;background:var(--danger);border-radius:50%;
  border:1.5px solid var(--white);
}
.mobile-menu{display:none}
.content-wrap{max-width:1320px;margin:auto;padding:40px 36px 70px}

/* ── WELCOME ROW ── */
.welcome-row{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:36px}
.welcome-row h1{font:700 28px 'Space Grotesk',sans-serif;margin:0 0 8px;color:var(--ink)}
.dashboard-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(290px,.9fr);gap:16px;margin-bottom:32px}

/* ID Card */
.id-main{display:flex;flex-direction:column;gap:5px;position:relative;z-index:1}
.id-label{color:#93c5fd;font-size:11px}
.id-main strong{font:700 28px 'Space Grotesk',sans-serif;letter-spacing:1.5px;color:#fff}
.id-footer{
  border-top:1px solid rgba(255,255,255,.12);padding-top:12px;
  display:flex;justify-content:space-between;align-items:center;
  color:#93c5fd;font-size:11px;position:relative;z-index:1;
}
.copy-button{background:rgba(255,255,255,.1);color:#fff;font-size:11px;border-radius:6px;padding:5px 10px;transition:background .15s}
.copy-button:hover{background:rgba(255,255,255,.2)}
.copy-button span{color:#bfdbfe;margin-left:4px}
.progress-value{font:700 17px 'Space Grotesk';color:var(--blue)}
.profile-progress{padding:22px 24px}
.profile-summary{display:flex;gap:12px;align-items:center;margin:16px 0 12px}
.profile-summary strong{font-size:14px;display:block;margin-bottom:3px}
.profile-summary span{font-size:11px;color:var(--muted);line-height:1.4;display:block}
.progress-track{height:6px;border-radius:5px;background:var(--line);margin-bottom:12px}
.progress-track span{display:block;height:100%;border-radius:5px;background:var(--blue);transition:width .7s ease}

/* ── FEED ── */
.section-heading{display:flex;align-items:flex-end;justify-content:space-between}
.feed-heading{margin:36px 0 16px}.section-heading h2{margin:0;font:700 19px 'Space Grotesk',sans-serif;color:var(--ink)}
.segmented{
  border:1.5px solid var(--line);background:var(--white);
  padding:3px;border-radius:9px;display:flex;gap:2px;flex-wrap:wrap;
}
.segment{
  background:transparent;padding:6px 12px;color:var(--muted);
  font-size:11px;border-radius:6px;cursor:pointer;border:0;font-weight:600;
  transition:background .15s,color .15s;
}
.segment.active{background:var(--blue);color:#fff}
.segment:hover:not(.active){background:var(--blue-pale);color:var(--blue)}
.main-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:28px}
.feed-column{display:flex;flex-direction:column;gap:12px}
.question-card{padding:20px 22px 16px;transition:box-shadow .2s,transform .2s}
.question-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-1px)}
.question-meta{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:11px;flex-wrap:wrap}
.more-button{background:transparent;color:var(--muted);letter-spacing:2px;margin-left:auto;padding:0 4px;border-radius:5px;transition:background .15s}
.more-button:hover{background:var(--blue-pale);color:var(--blue)}
.post-title{font:700 17px 'Space Grotesk',sans-serif;line-height:1.3;margin:14px 0 8px;color:var(--ink)}
.question-excerpt{color:var(--muted);line-height:1.6;font-size:12px;margin:0 0 16px}
.question-author{display:flex;align-items:center;gap:9px}
.question-author strong,.question-author small{display:block}
.question-author strong{font-size:11px}.question-author small{font-size:10px;color:var(--muted);margin-top:2px}
.question-actions{
  border-top:1.5px solid var(--line);margin-top:14px;padding-top:12px;
  display:flex;gap:14px;align-items:center;flex-wrap:wrap;
}
.question-actions button{background:transparent;color:var(--muted);font-size:11px;padding:4px 8px;border-radius:6px;transition:background .15s,color .15s}
.question-actions button:hover{background:var(--blue-pale);color:var(--blue)}
.question-actions .like-btn.selected{color:var(--blue);font-weight:700}

/* Media */
.post-media-grid{display:grid;gap:5px;margin:12px 0;border-radius:10px;overflow:hidden}
.post-media-grid.media-1{grid-template-columns:1fr}
.post-media-grid.media-2{grid-template-columns:1fr 1fr}
.post-media-grid.media-3{grid-template-columns:1fr 1fr;grid-template-rows:auto auto}
.post-media-grid.media-3 .media-item:first-child{grid-column:1/-1}
.post-media-grid.media-4{grid-template-columns:1fr 1fr}
.media-item{background:var(--blue-pale);border-radius:6px;overflow:hidden;max-height:280px;cursor:pointer;position:relative}
.media-item img{width:100%;height:100%;object-fit:cover;display:block}
.media-item video{width:100%;height:100%;object-fit:cover;display:block;max-height:280px}
.media-upload-bar{display:flex;gap:8px;padding:10px 0;border-top:1.5px solid var(--line);margin-top:12px;flex-wrap:wrap}
.media-upload-btn{
  display:flex;align-items:center;gap:6px;padding:7px 12px;
  border-radius:7px;background:var(--blue-pale);color:var(--blue);
  font-size:11px;font-weight:700;cursor:pointer;border:1.5px solid var(--line);
  transition:background .15s,border-color .15s;
}
.media-upload-btn:hover{background:var(--blue);color:#fff;border-color:var(--blue)}
.media-upload-btn input[type=file]{display:none}
.media-preview-strip{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.media-preview-thumb{width:60px;height:60px;border-radius:7px;overflow:hidden;position:relative;border:1.5px solid var(--line)}
.media-preview-thumb img,.media-preview-thumb video{width:100%;height:100%;object-fit:cover}
.remove-media{position:absolute;top:2px;right:2px;background:rgba(17,24,39,.7);color:#fff;border-radius:50%;width:16px;height:16px;font-size:10px;display:grid;place-items:center;cursor:pointer;border:0}

/* Comments */
.comments-section{padding:12px 0 0;border-top:1.5px solid var(--line);margin-top:8px}
.comments-list{display:flex;flex-direction:column;gap:9px;max-height:260px;overflow-y:auto;padding-bottom:10px}
.comment-item{display:flex;gap:8px;align-items:flex-start}
.comment-avatar{width:26px;height:26px;border-radius:50%;background:var(--blue-pale);color:var(--blue);display:grid;place-items:center;font-size:11px;font-weight:700;flex-shrink:0}
.comment-body{background:var(--paper);border-radius:0 9px 9px 9px;padding:8px 12px;flex:1;border:1.5px solid var(--line)}
.comment-body strong{font-size:11px;display:block;margin-bottom:3px;color:var(--ink)}
.comment-body span{font-size:12px;color:var(--muted)}
.add-comment-row{display:flex;gap:8px;margin-top:10px}
.comment-input{flex:1;border:1.5px solid var(--line);border-radius:8px;padding:9px 12px;font-size:12px;outline:none;background:var(--white);transition:border-color .15s}
.comment-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(26,86,219,.1)}

/* Right rail */
.right-rail{min-width:0}.rail-section{margin-bottom:28px}
.compact{align-items:center;margin-bottom:12px}.compact h2{font-size:14px;color:var(--ink)}
.suggestion{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1.5px solid var(--line)}
.suggestion:last-child{border-bottom:none}
.community-symbol{width:32px;height:32px;border-radius:8px;display:grid;place-items:center;font-size:18px}
.suggestion strong,.suggestion span{display:block}
.suggestion strong{font-size:11px;color:var(--ink)}
.suggestion span{font-size:10px;color:var(--muted);margin-top:2px}
.join-button,.follow-button{
  background:var(--blue-pale);color:var(--blue);font-weight:700;
  font-size:10px;padding:6px 10px;border-radius:6px;margin-left:auto;border:0;cursor:pointer;
  transition:background .15s,color .15s;
}
.join-button:hover,.follow-button:hover{background:var(--blue);color:#fff}
.follow-button{background:var(--white);border:1.5px solid var(--line);color:var(--ink)}
.follow-button:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-pale)}
.study-match{
  background:linear-gradient(135deg,var(--blue-pale) 0%,#dbeafe 100%);
  border:1.5px solid #bfdbfe;
  border-radius:12px;padding:20px 18px;display:flex;gap:14px;
  position:relative;overflow:hidden;
}
.match-icon{background:var(--blue);color:#fff;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;flex:0 0 auto}
.study-match h3{font:700 15px 'Space Grotesk';margin:0 0 5px;color:var(--ink)}
.study-match p{font-size:11px;color:var(--muted);line-height:1.45;margin:0}
.online-pip{position:absolute;bottom:1px;right:1px;width:9px;height:9px;background:var(--success);border:2px solid var(--white);border-radius:50%}

/* Subpages */
.subpage-head{padding:6px 0 28px;max-width:680px}
.subpage-head h1{font:700 30px 'Space Grotesk',sans-serif;margin:0 0 8px;color:var(--ink)}
.subpage-grid{display:grid;gap:10px;max-width:800px}
.feature-row{display:flex;align-items:center;gap:16px;padding:18px 22px}
.row-number{font:700 15px 'Space Grotesk';color:var(--blue);width:24px;flex-shrink:0}
.feature-row h3{font:700 14px 'Space Grotesk';margin:0 0 4px;color:var(--ink)}
.feature-row p{color:var(--muted);font-size:11px;margin:0}
.row-action{background:transparent;color:var(--blue);font-size:11px;font-weight:700;margin-left:auto;white-space:nowrap;cursor:pointer;border:0;padding:6px 10px;border-radius:6px;transition:background .15s}
.row-action:hover{background:var(--blue-pale)}

/* Connect */
.connect-layout{display:grid;grid-template-columns:1fr 280px;gap:22px}
.connect-search-input{
  width:100%;border:1.5px solid var(--line);border-radius:9px;
  padding:11px 16px;font-size:13px;outline:none;background:var(--white);
  transition:border-color .15s,box-shadow .15s;
}
.connect-search-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(26,86,219,.1)}
.student-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px}
.student-card{
  padding:20px;text-align:center;position:relative;
  transition:transform .2s,box-shadow .2s;
}
.student-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.student-card-top{display:flex;justify-content:center;position:relative;margin-bottom:10px}
.student-card h3{font:700 13px 'Space Grotesk';margin:0 0 3px;color:var(--ink)}
.student-card p{font-size:11px;color:var(--muted);margin:0 0 2px}
.student-card small{font-size:10px;color:#9ca3af}
.student-bio{font-size:11px;color:var(--muted);margin:8px 0;line-height:1.4}
.student-card-actions{display:flex;gap:5px;justify-content:center;margin-top:10px;flex-wrap:wrap}
.ai-tag{position:absolute;top:0;right:0;background:var(--blue-pale);color:var(--blue);font-size:9px;font-weight:700;padding:2px 6px;border-radius:8px}

/* Messages */
.messages-layout{
  display:grid;grid-template-columns:290px 1fr;gap:0;
  border-radius:12px;overflow:hidden;box-shadow:var(--shadow-lg);
  border:1.5px solid var(--line);
}
.inbox-list{
  border-right:1.5px solid var(--line);overflow-y:auto;max-height:72vh;
  background:var(--white);
}
.inbox-search-row{padding:14px 14px;border-bottom:1.5px solid var(--line)}
.inbox-search-row input{
  width:100%;border:1.5px solid var(--line);border-radius:8px;
  padding:8px 12px;font-size:12px;outline:none;transition:border-color .15s;
}
.inbox-search-row input:focus{border-color:var(--blue)}
.inbox-item{
  display:flex;align-items:center;gap:11px;padding:13px 14px;
  border-bottom:1.5px solid var(--line);cursor:pointer;transition:background .15s;
}
.inbox-item:hover,.inbox-item.active{background:var(--blue-pale)}
.inbox-avatar{width:36px;height:36px;border-radius:50%;background:var(--blue-pale);color:var(--blue);display:grid;place-items:center;font-size:16px;flex-shrink:0}
.inbox-info{flex:1;min-width:0}
.inbox-info strong{font-size:12px;display:block;color:var(--ink)}
.inbox-info span{font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
.inbox-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px}
.inbox-time{font-size:10px;color:var(--muted)}
.inbox-unread{background:var(--blue);color:#fff;border-radius:9px;font-size:9px;font-weight:700;padding:2px 6px}
.message-thread-panel{display:flex;flex-direction:column;min-height:380px;background:var(--white)}
.thread-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);gap:10px}
.thread-empty span{font-size:38px}
.thread-header{padding:14px 18px;border-bottom:1.5px solid var(--line);font-weight:700;font-size:14px;color:var(--ink);background:var(--paper)}
.dm-thread{flex:1;overflow-y:auto;padding:16px 18px;display:flex;flex-direction:column;gap:10px;max-height:48vh}
.dm-modal .dm-thread{max-height:300px}
.dm-msg{display:flex;gap:8px;align-items:flex-end}
.dm-msg-mine{flex-direction:row-reverse}
.dm-bubble{
  background:var(--blue-pale);border-radius:12px 12px 0 12px;
  padding:10px 14px;max-width:72%;border:1.5px solid #bfdbfe;
}
.dm-msg-mine .dm-bubble{background:var(--blue);color:#fff;border-radius:12px 12px 12px 0;border-color:var(--blue)}
.dm-bubble p{margin:0;font-size:13px;line-height:1.5}
.dm-ts{font-size:9px;color:#9ca3af;margin-top:4px;display:block}
.dm-msg-mine .dm-ts{color:rgba(255,255,255,.6)}
.dm-msg-sender{
  width:26px;height:26px;border-radius:50%;
  background:var(--blue-pale);color:var(--blue);
  display:grid;place-items:center;font-size:13px;flex-shrink:0;
}
.dm-input-row{display:flex;gap:10px;padding:12px 14px;border-top:1.5px solid var(--line);background:var(--paper)}
.dm-input{
  flex:1;border:1.5px solid var(--line);border-radius:8px;
  padding:10px 14px;font-size:13px;outline:none;
  background:var(--white);transition:border-color .15s;
}
.dm-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(26,86,219,.08)}
.dm-modal{width:min(540px,100%)}

/* Typing indicator */
.typing-indicator{display:flex;align-items:center;gap:5px;padding:9px 12px;background:var(--blue-pale);border-radius:12px 12px 12px 0;width:fit-content;border:1.5px solid #bfdbfe}
.typing-dot{width:7px;height:7px;border-radius:50%;background:var(--blue);animation:typingBounce 1.2s infinite}
.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}
.typing-label{font-size:10px;color:var(--blue);margin:2px 0 5px;font-weight:600}

/* Workspace */
.ws-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.ws-full-width{grid-column:1/-1}
.ws-panel{padding:20px 22px}.ws-panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.ws-panel-header h2{font:700 15px 'Space Grotesk';margin:0;color:var(--ink)}
.task-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:7px}
.task-item{display:flex;align-items:center;gap:9px;padding:9px 12px;border-radius:8px;background:var(--paper);border:1.5px solid var(--line);transition:background .15s}
.task-item:hover{background:var(--blue-pale);border-color:#bfdbfe}
.task-done .task-title{text-decoration:line-through;color:var(--muted)}
.task-check{width:16px;height:16px;accent-color:var(--blue);cursor:pointer;flex-shrink:0}
.task-title{flex:1;font-size:13px;color:var(--ink)}
.task-priority{font-size:9px;font-weight:700;padding:2px 7px;border-radius:8px}
.priority-high{background:#fee2e2;color:#dc2626}
.priority-medium{background:#fef3c7;color:#d97706}
.priority-low{background:#dcfce7;color:#16a34a}
.task-delete-btn{background:transparent;color:#d1d5db;font-size:13px;padding:2px 5px;opacity:.6;cursor:pointer;border:0;border-radius:5px;transition:all .15s}
.task-delete-btn:hover{opacity:1;color:var(--danger);background:#fee2e2}
.task-empty{color:var(--muted);font-size:12px;padding:10px 0;list-style:none}
.notes-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.note-card{background:var(--blue-pale);border:1.5px solid #bfdbfe;border-radius:9px;padding:13px;position:relative;cursor:pointer;transition:transform .15s,box-shadow .15s}
.note-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.note-pinned{background:#dbeafe;border-color:#93c5fd}
.note-pin{position:absolute;top:8px;right:10px;font-size:13px}
.note-card h4{font:700 12px 'Space Grotesk';margin:0 0 6px;color:var(--ink)}
.note-card p{font-size:11px;color:var(--muted);margin:0;line-height:1.5}
.note-footer{display:flex;justify-content:space-between;align-items:center;margin-top:9px}
.note-footer span{font-size:10px;color:var(--muted)}
.note-delete-btn{background:transparent;color:#d1d5db;font-size:12px;opacity:.5;cursor:pointer;border:0;border-radius:4px;transition:all .15s}
.note-delete-btn:hover{opacity:1;color:var(--danger)}
.pomodoro-panel{text-align:center}
.pomodoro-display{display:flex;flex-direction:column;align-items:center;gap:12px}
.pomodoro-ring{position:relative;width:120px;height:120px}
.pomodoro-svg{width:120px;height:120px;transform:rotate(-90deg)}
.pomodoro-track{fill:none;stroke:var(--line);stroke-width:8}
.pomodoro-progress{fill:none;stroke:var(--blue);stroke-width:8;stroke-linecap:round;transition:stroke-dashoffset 1s linear}
.pomodoro-time{position:absolute;inset:0;display:grid;place-items:center;font:700 22px 'Space Grotesk';color:var(--ink)}
.pomodoro-actions{display:flex;gap:8px}
.pomodoro-sessions{font-size:11px;color:var(--muted)}
.resources-list{display:flex;flex-direction:column;gap:2px}
.resource-item{display:flex;align-items:center;gap:11px;padding:10px 0;border-bottom:1.5px solid var(--line)}
.resource-item:last-child{border-bottom:none}
.resource-icon{font-size:20px;width:26px;text-align:center}
.resource-item strong{font-size:12px;display:block;color:var(--ink)}
.resource-item span{font-size:10px;color:var(--muted)}
.study-plan-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:7px}
.study-plan-day{background:var(--blue-pale);border:1.5px solid #bfdbfe;border-radius:8px;padding:10px 6px;text-align:center}
.study-plan-day strong{display:block;font-size:10px;font-weight:700;color:var(--blue);margin-bottom:4px}
.study-plan-day span{font-size:10px;color:var(--muted);line-height:1.4}

/* Profile */
.profile-layout{display:grid;grid-template-columns:260px 1fr;gap:22px}
.profile-card{padding:26px;text-align:center}
.profile-avatar-wrap{position:relative;display:inline-block;margin-bottom:12px}
.profile-big-avatar{width:76px;height:76px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font:700 26px 'Space Grotesk';margin:0 auto}
.avatar-upload-btn{position:absolute;bottom:0;right:0;background:var(--blue);color:#fff;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-size:12px;cursor:pointer;border:2px solid var(--white)}
.profile-field-tag{color:var(--blue);font-size:12px;font-weight:700;margin:4px 0}
.profile-institution{color:var(--muted);font-size:11px;margin:0 0 10px}
.profile-bio{font-size:12px;color:var(--muted);line-height:1.5;margin:8px 0 0}
.profile-detail-row{display:flex;justify-content:space-between;align-items:center;padding:9px 0;border-bottom:1.5px solid var(--line);font-size:12px}
.profile-detail-row:last-child{border-bottom:none}
.profile-detail-row span{color:var(--muted)}.profile-detail-row strong{font-weight:600;text-align:right;color:var(--ink)}
.pv-header{display:flex;gap:14px;align-items:flex-start;margin-bottom:14px}
.pv-avatar{width:56px;height:56px;border-radius:50%;background:var(--blue-pale);color:var(--blue);display:grid;place-items:center;font:700 20px 'Space Grotesk';flex-shrink:0}
.pv-info h3{font:700 16px 'Space Grotesk';margin:0 0 3px;color:var(--ink)}
.pv-info p{font-size:12px;color:var(--muted);margin:0}
.pv-stats{display:flex;border-top:1.5px solid var(--line);border-bottom:1.5px solid var(--line);padding:11px 0;margin-top:12px}
.pv-stats div{flex:1;text-align:center}
.pv-stats strong{display:block;font:700 17px 'Space Grotesk';color:var(--ink)}
.pv-stats span{font-size:10px;color:var(--muted)}
.community-cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px}
.community-big-card{display:flex;align-items:center;gap:14px;padding:18px 20px}
.comm-icon-wrap{width:42px;height:42px;border-radius:10px;display:grid;place-items:center;font-size:22px;flex-shrink:0;background:var(--blue-pale);color:var(--blue)}
.comm-info h3{font:700 13px 'Space Grotesk';margin:0 0 3px;color:var(--ink)}
.comm-info p{font-size:11px;color:var(--muted);margin:0 0 3px;line-height:1.4}
.comm-info span{font-size:10px;color:#9ca3af}

/* Language selector */
.lang-selector-wrap{position:relative}
.lang-trigger{
  display:flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);
  border-radius:20px;padding:6px 12px;color:rgba(255,255,255,.85);
  font-size:11px;font-weight:600;cursor:pointer;transition:background .15s;
}
.lang-trigger:hover{background:rgba(255,255,255,.22)}
.lang-name{max-width:66px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lang-arrow{font-size:10px;opacity:.6}
.lang-dropdown{
  position:absolute;top:calc(100% + 8px);right:0;
  background:var(--white);border:1.5px solid var(--line);border-radius:11px;
  box-shadow:var(--shadow-lg);min-width:155px;z-index:200;overflow:hidden;
  display:none;animation:slideDown .18s ease-out;
}
.lang-dropdown.open{display:block}
.lang-option{
  display:flex;align-items:center;gap:9px;width:100%;padding:10px 13px;
  background:transparent;border:0;font-size:12px;color:var(--ink);
  cursor:pointer;transition:background .12s;
}
.lang-option:hover{background:var(--blue-pale)}
.lang-option.active{background:var(--blue-pale);color:var(--blue);font-weight:700}
.lang-check{margin-left:auto;color:var(--blue);font-size:14px}
.topbar .lang-trigger{
  background:var(--white);border:1.5px solid var(--line);color:var(--ink);
  padding:5px 10px;font-size:11px;border-radius:16px;
}
.topbar .lang-trigger:hover{border-color:var(--blue);background:var(--blue-pale);color:var(--blue)}
.auth-screen .lang-trigger,.register-screen .lang-trigger,.verify-screen .lang-trigger{
  background:var(--paper);border-color:var(--line);color:var(--ink);
}

/* ── PORTFOLIO (full-screen slides) ── */
html,body{height:100%;overflow:hidden}
.portfolio-page{height:100vh;width:100vw;overflow:hidden;position:relative}
.slide-container{display:flex;width:100%;height:100vh;transition:transform .65s cubic-bezier(.77,0,.18,1);will-change:transform}
.slide{min-width:100vw;height:100vh;display:flex;flex-direction:column;overflow:hidden;flex-shrink:0;position:relative}
.slide-hero{background:linear-gradient(145deg,var(--blue-dark) 0%,var(--blue) 55%,#60a5fa 100%);color:#fff}
.slide-features{background:var(--paper)}
.slide-fields{background:linear-gradient(160deg,var(--blue-dark) 0%,var(--blue) 100%);color:#fff}
.slide-proof{background:linear-gradient(160deg,#f0f7ff 0%,var(--blue-pale) 100%)}
.slide-cta{background:linear-gradient(135deg,var(--blue-dark) 0%,var(--blue) 50%,var(--blue-mid) 100%);color:#fff;overflow:hidden}

/* Portfolio nav */
.slide-hero .pf-nav{position:absolute;top:0;left:0;right:0;height:74px;max-width:1280px;margin:auto;padding:0 36px;display:flex;align-items:center;justify-content:space-between;z-index:10}
.slide-hero .pf-nav .brand{color:#fff;margin:0}
.slide-hero .pf-nav .brand-mark{background:rgba(255,255,255,.2)}
.slide-hero .pf-nav .brand>span:last-child span{color:#bfdbfe}
.pf-nav-links{display:flex;gap:5px}
.pf-nav-link{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);color:rgba(255,255,255,.8);padding:7px 14px;border-radius:20px;font-size:12px;font-weight:600;cursor:pointer;transition:background .2s,color .2s;border:1px solid transparent}
.pf-nav-link:hover,.pf-nav-link.active{background:rgba(255,255,255,.2);color:#fff;border-color:rgba(255,255,255,.3)}

/* Hero body */
.hero-body{flex:1;display:flex;align-items:center;max-width:1280px;margin:0 auto;width:100%;padding:74px 36px 0;gap:56px}
.hero-left{flex:1;max-width:560px}
.hero-left .badge{display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:20px;padding:6px 14px;font-size:11px;font-weight:700;color:rgba(255,255,255,.9);margin-bottom:26px}
.hero-left h1{font:700 clamp(42px,5.2vw,76px) 'Space Grotesk',sans-serif;line-height:.95;letter-spacing:-2px;margin:0 0 20px;color:#fff}
.hero-left h1 em{font-style:normal;color:#bfdbfe}
.hero-left p{color:rgba(255,255,255,.7);font-size:15px;line-height:1.65;margin:0 0 30px;max-width:440px}
.hero-cta-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.btn-hero-primary{background:#fff;color:var(--blue);padding:13px 22px;border-radius:9px;font:700 13px 'DM Sans';border:0;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:transform .2s,box-shadow .2s}
.btn-hero-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,255,255,.3)}
.btn-hero-secondary{color:rgba(255,255,255,.75);font-size:12px;font-weight:700;background:transparent;border:0;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:color .2s}
.btn-hero-secondary:hover{color:#fff}
.hero-stats{display:flex;gap:28px;margin-top:40px;padding-top:28px;border-top:1px solid rgba(255,255,255,.15);flex-wrap:wrap}
.hero-stat strong{display:block;font:700 26px 'Space Grotesk';color:#fff}
.hero-stat span{font-size:11px;color:rgba(255,255,255,.55);margin-top:2px;display:block}

/* Hero floating cards */
.hero-right{flex:0 0 400px;position:relative;height:380px;display:none}
@media(min-width:900px){.hero-right{display:block}}
.hf-card{position:absolute;background:var(--white);border-radius:12px;box-shadow:0 16px 44px rgba(17,24,39,.2);padding:16px 18px}
.hf-card-main{width:280px;left:20px;top:28px;transform:rotate(-2.5deg)}
.hf-card-main .tag{background:var(--blue-pale);color:var(--blue);font-size:10px;font-weight:700;padding:3px 8px;border-radius:5px;display:inline-block;margin-bottom:8px}
.hf-card-main h4{font:700 14px 'Space Grotesk';color:var(--ink);margin:0 0 12px;line-height:1.3}
.hf-card-main .card-foot{display:flex;align-items:center;gap:7px;border-top:1.5px solid var(--line);padding-top:9px}
.mini-av{width:24px;height:24px;border-radius:50%;background:var(--blue-pale);color:var(--blue);font-size:9px;font-weight:700;display:grid;place-items:center}
.card-foot strong{font-size:10px;color:var(--ink);display:block}
.card-foot small{font-size:9px;color:var(--muted)}
.hf-card-float{width:190px;right:0;bottom:50px;transform:rotate(3.5deg);display:flex;align-items:center;gap:9px}
.hf-float-icon{width:30px;height:30px;border-radius:50%;background:var(--blue-pale);color:var(--blue);display:grid;place-items:center;font-size:15px;flex-shrink:0}
.hf-card-float strong{font-size:11px;color:var(--ink);display:block}
.hf-card-float small{font-size:9px;color:var(--muted)}
.hf-card-ai{width:210px;right:25px;top:18px;transform:rotate(2.5deg);display:flex;align-items:center;gap:9px}
.hf-card-ai .ai-icon{font-size:20px}
.hf-card-ai strong{font-size:11px;color:var(--ink);display:block}
.hf-card-ai small{font-size:9px;color:var(--muted)}
.hero-orbit{position:absolute;border:1px solid rgba(255,255,255,.06);border-radius:50%;pointer-events:none}
.ho1{width:480px;height:480px;right:-190px;bottom:-190px}
.ho2{width:310px;height:310px;right:-90px;bottom:-90px;border-color:rgba(255,255,255,.1)}

/* Slide controls */
.slide-dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:7px;z-index:10}
.slide-dot{width:7px;height:7px;border-radius:50%;background:rgba(255,255,255,.35);cursor:pointer;transition:background .3s,width .3s}
.slide-dot.active{background:#fff;width:22px;border-radius:4px}
.slide-nav-arrow{position:absolute;top:50%;transform:translateY(-50%);width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);color:#fff;font-size:16px;cursor:pointer;display:grid;place-items:center;z-index:10;transition:background .2s}
.slide-nav-arrow:hover{background:rgba(255,255,255,.25)}
.arr-prev{left:16px}.arr-next{right:16px}

/* Slide inner layout */
.slide-inner{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 36px 20px;max-width:1180px;margin:0 auto;width:100%}
.slide-label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;color:var(--blue);margin-bottom:10px}
.slide-fields .slide-label{color:#93c5fd}
.slide-h2{font:700 clamp(26px,3.2vw,44px) 'Space Grotesk';margin:0 0 12px;text-align:center;letter-spacing:-.4px;color:var(--ink)}
.slide-fields .slide-h2,.slide-cta .slide-h2{color:#fff}
.slide-sub{color:var(--muted);font-size:14px;text-align:center;max-width:500px;line-height:1.6;margin:0 0 36px}
.slide-fields .slide-sub{color:rgba(255,255,255,.65)}

/* Features grid */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px;width:100%;max-width:980px}
.feat-card{background:var(--white);border:1.5px solid var(--line);border-radius:12px;padding:22px 20px;transition:transform .2s,box-shadow .2s,border-color .2s}
.feat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#bfdbfe}
.feat-card .fi{font-size:26px;margin-bottom:12px}
.feat-card h3{font:700 13px 'Space Grotesk';margin:0 0 6px;color:var(--ink)}
.feat-card p{font-size:11px;color:var(--muted);line-height:1.5;margin:0}

/* Fields grid */
.fields-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;width:100%;max-width:860px}
.field-pill{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:10px;padding:16px;display:flex;align-items:center;gap:12px;cursor:pointer;transition:background .2s,transform .15s,border-color .2s}
.field-pill:hover{background:rgba(255,255,255,.16);transform:scale(1.02);border-color:rgba(255,255,255,.3)}
.field-pill .fp-icon{font-size:22px;flex-shrink:0}
.field-pill strong{display:block;font:700 12px 'Space Grotesk';color:#e2e8e6}
.field-pill span{font-size:10px;color:#93c5fd;margin-top:2px;display:block}
.ai-note-band{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:9px;padding:12px 18px;display:flex;align-items:center;gap:11px;margin-top:20px;max-width:860px;width:100%}
.ai-note-band p{font-size:12px;color:rgba(255,255,255,.8);margin:0;line-height:1.5}
.ai-note-band strong{color:#bfdbfe}

/* Testimonials */
.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;width:100%;max-width:960px}
.testi-card{background:var(--white);border:1.5px solid var(--line);border-radius:12px;padding:22px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.testi-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.testi-stars{color:#f59e0b;font-size:14px;margin-bottom:10px}
.testi-text{font-size:12px;color:var(--muted);line-height:1.65;margin:0 0 14px;font-style:italic}
.testi-author{display:flex;align-items:center;gap:10px}
.testi-av{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-size:17px;flex-shrink:0;background:var(--blue-pale)}
.testi-author strong{display:block;font-size:12px;color:var(--ink)}
.testi-author small{font-size:10px;color:var(--muted)}

/* CTA slide */
.cta-body{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px;text-align:center;position:relative;z-index:2}
.cta-orbit{position:absolute;border:1px solid rgba(255,255,255,.1);border-radius:50%;pointer-events:none}
.co1{width:600px;height:600px;top:-250px;right:-200px}
.co2{width:400px;height:400px;bottom:-150px;left:-150px}
.slide-cta h2{font:700 clamp(34px,5vw,64px) 'Space Grotesk';margin:0 0 16px;line-height:.97;letter-spacing:-1.5px;color:#fff}
.slide-cta h2 span{color:rgba(255,255,255,.4)}
.slide-cta p{color:rgba(255,255,255,.75);font-size:15px;max-width:440px;margin:0 auto 32px;line-height:1.6}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.btn-cta-white{background:#fff;color:var(--blue);padding:13px 26px;border-radius:9px;font:700 13px 'DM Sans';border:0;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn-cta-white:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.15)}
.btn-cta-ghost{background:transparent;color:#fff;padding:13px 26px;border-radius:9px;font:700 13px 'DM Sans';border:2px solid rgba(255,255,255,.35);cursor:pointer;transition:border-color .2s,background .2s}
.btn-cta-ghost:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.cta-footer-links{position:absolute;bottom:22px;left:0;right:0;display:flex;justify-content:center;gap:22px;z-index:2}
.cta-footer-links a{color:rgba(255,255,255,.5);font-size:11px;font-weight:600}
.cta-footer-links a:hover{color:#fff}

/* ── RESPONSIVE ── */
@media(max-width:1100px){
  .ws-grid{grid-template-columns:1fr}
  .connect-layout{grid-template-columns:1fr}
  .connect-sidebar{display:none}
  .profile-layout{grid-template-columns:1fr}
}
@media(max-width:1000px){
  .sidebar{width:210px}.main-content{margin-left:210px}
  .topbar{padding:0 22px}.content-wrap{padding:32px 22px}
  .main-grid{grid-template-columns:1fr}
  .right-rail{display:grid;grid-template-columns:1fr 1fr;gap:22px}
  .study-match{grid-column:1/-1}
  .messages-layout{grid-template-columns:240px 1fr}
}
@media(max-width:768px){
  .register-screen{display:block}
  .register-side{min-height:200px;padding:26px 22px}
  .register-side h1{font-size:30px;margin:10px 0}
  .register-panel{padding:26px 18px}
  .form-row{display:block}
  .auth-screen{display:block}
  .auth-art{height:150px;padding:22px 18px;justify-content:flex-start}
  .auth-art p{font-size:18px;margin-top:16px}
  .auth-panel{padding:28px 18px;max-height:none}
  .auth-brand{margin-bottom:36px}.auth-copy h1{font-size:28px}
  .auth-art-features{display:none}
  .messages-layout{grid-template-columns:1fr}
  .inbox-list{max-height:45vh}
  .hero-body{padding:74px 20px 20px;flex-direction:column;gap:22px}
  .hero-left{max-width:100%}
  .fields-grid{grid-template-columns:1fr 1fr}
  .features-grid{grid-template-columns:1fr 1fr}
  .testimonials-grid{grid-template-columns:1fr}
  .pf-nav-links{display:none}
  .slide-hero .pf-nav{padding:0 18px}
  .slide-inner{padding:70px 20px 60px}
  .study-plan-grid{grid-template-columns:repeat(4,1fr)}
  .notes-grid{grid-template-columns:1fr}
}
@media(max-width:700px){
  body{min-width:320px;overflow-x:hidden}
  .sidebar{transform:translateX(-100%);transition:transform .25s;box-shadow:10px 0 28px rgba(17,24,39,.15)}
  .sidebar.open{transform:translateX(0)}.main-content{margin-left:0}
  .topbar{height:62px;padding:0 14px}
  .mobile-menu{display:block;margin:0 6px 0 0;font-size:18px;color:var(--ink);background:transparent;border:0}
  .breadcrumb{flex:1}.breadcrumb span,.breadcrumb strong{display:none}
  .top-actions{gap:8px}
  .search-box{width:34px;border:0;background:transparent;padding:0}
  .search-box input,.search-box kbd{display:none}
  .search-box span{font-size:22px}
  .content-wrap{padding:24px 14px 56px}
  .welcome-row{display:block;margin-bottom:24px}.welcome-row h1{font-size:24px}
  .welcome-row .button{margin-top:16px;width:100%;justify-content:center}
  .dashboard-grid{grid-template-columns:1fr}
  .id-main strong{font-size:24px}
  .feed-heading{margin-top:28px;display:block}
  .segmented{margin-top:10px}
  .right-rail{display:block}.rail-section{margin-top:24px}
  .question-card{padding:14px 13px 12px}.post-title{font-size:15px}
  .question-actions{gap:8px;flex-wrap:wrap}
  .modal{padding:16px}.modal-footer{display:block}
  .modal-footer .button{width:100%;justify-content:center;margin-top:10px}
  .otp-row{gap:7px}.otp-input{width:40px;height:50px;font-size:20px}
  .verify-panel{padding:26px 18px}
  .student-grid{grid-template-columns:1fr 1fr}
  .ws-grid{grid-template-columns:1fr}
  .study-plan-grid{grid-template-columns:1fr 1fr}
  .profile-layout{grid-template-columns:1fr}
  .fields-grid{grid-template-columns:1fr}
}