/* ================================================================
   HackHub — Premium Design System (with Dark Mode)
   ================================================================ */

:root {
  /* Light Mode Colors */
  --ink-900: #0b0f1a;
  --ink-800: #141925;
  --ink-700: #1e2433;
  --ink-600: #2a3142;
  --ink-500: #3d4456;
  --ink-400: #6b7180;
  --ink-300: #9ca0ac;
  --ink-200: #c8ccd3;
  --ink-100: #e8eaee;
  --ink-50:  #f6f7f9;
  --paper:   #fcfcfd;
  --white:   #ffffff;

  --accent:        #2d4ef5;
  --accent-hover:  #1f3edb;
  --accent-soft:   #ecefff;
  --accent-line:   #d4daff;

  --ok:    #0d8a5d;
  --ok-bg: #e6f4ee;
  --warn:  #b25e09;
  --warn-bg: #fdf1e1;
  --err:   #b8203a;
  --err-bg: #fdedef;

  --bg:        #f6f7f9;
  --surface:   #ffffff;
  --surface-2: #fafbfc;
  --line:      #ececf0;
  --line-soft: #f1f1f4;

  --font-ar: 'Tajawal', 'Inter', system-ui, -apple-system, sans-serif;
  --font-en: 'Inter', system-ui, -apple-system, sans-serif;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;

  --shadow-1: 0 1px 0 rgba(11,15,26,.04), 0 1px 2px rgba(11,15,26,.04);
  --shadow-2: 0 1px 0 rgba(11,15,26,.04), 0 4px 12px rgba(11,15,26,.06);
  --shadow-3: 0 1px 0 rgba(11,15,26,.04), 0 12px 32px rgba(11,15,26,.08);

  /* Backward compat */
  --hh-navy: var(--ink-900);
  --hh-blue: var(--accent);
  --hh-green: var(--ok);
  --hh-orange: var(--warn);
  --hh-bg: var(--bg);
  --hh-border: var(--line);
}

/* ============ DARK MODE ============ */
[data-theme="dark"] {
  --ink-900: #f3f4f6;
  --ink-800: #e5e7eb;
  --ink-700: #d1d5db;
  --ink-600: #9ca3af;
  --ink-500: #9ca3af;
  --ink-400: #6b7280;
  --ink-300: #4b5563;
  --ink-200: #374151;
  --ink-100: #1f2937;
  --ink-50:  #111827;
  --paper:   #0f1419;
  --white:   #161b22;

  --accent:        #6b8aff;
  --accent-hover:  #8aa3ff;
  --accent-soft:   #1e2845;
  --accent-line:   #2d3960;

  --ok:    #34d399;
  --ok-bg: #064e3b;
  --warn:  #fbbf24;
  --warn-bg: #422006;
  --err:   #f87171;
  --err-bg: #450a0a;

  --bg:        #0d1117;
  --surface:   #161b22;
  --surface-2: #1c2128;
  --line:      #30363d;
  --line-soft: #21262d;

  --shadow-1: 0 1px 0 rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.3);
  --shadow-2: 0 1px 0 rgba(0,0,0,.4), 0 4px 12px rgba(0,0,0,.4);
  --shadow-3: 0 1px 0 rgba(0,0,0,.5), 0 12px 32px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

html, body {
  background: var(--bg);
  color: var(--ink-900);
  font-family: var(--font-ar);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color .25s ease, color .25s ease;
}

a { text-decoration: none; color: inherit; }
.container { max-width: 1200px; }

/* Smooth theme transitions */
* { transition: background-color .25s ease, border-color .25s ease, color .25s ease; }

/* Buttons */
.btn { font-weight: 500; border-radius: var(--r-md); padding: .55rem 1.1rem; font-size: .92rem; border-width: 1px; transition: all .15s ease; }
.btn-primary { background: var(--ink-900); border-color: var(--ink-900); color: var(--white); }
.btn-primary:hover { background: var(--ink-800); border-color: var(--ink-800); color: var(--white); }
[data-theme="dark"] .btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
[data-theme="dark"] .btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-outline-primary { color: var(--ink-900); border-color: var(--ink-200); background: transparent; }
.btn-outline-primary:hover { background: var(--ink-50); border-color: var(--ink-200); color: var(--ink-900); }
.btn-navy { background: transparent; border: 1px solid var(--ink-200); color: var(--ink-900); }
.btn-navy:hover { background: var(--ink-50); border-color: var(--ink-300); color: var(--ink-900); }
.btn-soft { background: var(--ink-50); color: var(--ink-900); border: 1px solid var(--line); }
.btn-soft:hover { background: var(--ink-100); border-color: var(--ink-200); color: var(--ink-900); }
.btn-lg { padding: .75rem 1.5rem; font-size: 1rem; }
.btn-danger { background: var(--err); border-color: var(--err); color: #fff; }
.btn-success { background: var(--ok); border-color: var(--ok); color: #fff; }

/* Theme toggle */
.theme-toggle {
  width: 38px; height: 38px;
  border-radius: 50%;  /* Round modern style */
  background: var(--ink-50);
  border: 1px solid var(--line);
  color: var(--ink-700);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all .2s;
  font-size: .95rem;
}
.theme-toggle:hover { background: var(--ink-100); color: var(--ink-900); transform: translateY(-1px); }
.theme-toggle .moon { display: inline; }
.theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .moon { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: inline; }

/* Navbar */
.hh-nav {
  background: rgba(252,252,253,.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
  padding: .9rem 0;
}
[data-theme="dark"] .hh-nav { background: rgba(13,17,23,.85); }
.hh-nav .nav-link { color: var(--ink-500); font-weight: 500; font-size: .92rem; padding: .35rem .8rem; border-radius: var(--r-sm); transition: color .15s; }
.hh-nav .nav-link:hover, .hh-nav .nav-link.active { color: var(--ink-900); }

.hh-logo-wrap {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--ink-900);
  color: var(--white);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-family: var(--font-en);
  font-size: 14px;
  letter-spacing: -.5px;
}
[data-theme="dark"] .hh-logo-wrap { background: var(--accent); color: #fff; }
.hh-brand-text { font-weight: 700; color: var(--ink-900); letter-spacing: -.3px; font-size: 1.15rem; }
.hh-brand-text span { color: var(--ink-900); }
[data-theme="dark"] .hh-brand-text span { color: var(--accent); }

/* Hero */
.hh-hero {
  background: var(--paper);
  padding: 96px 0 80px;
  border-bottom: 1px solid var(--line);
}
.hh-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--white);
  color: var(--ink-700);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 500;
  border: 1px solid var(--line);
}
.hh-eyebrow i { display: none; }
.hh-eyebrow::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--ok);
}
.hh-h1 {
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.1;
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  letter-spacing: -1.5px;
  margin: 1.2rem 0 1.4rem;
}
.hh-h1 .accent { color: var(--ink-400); font-style: italic; font-weight: 400; }
.hh-lead {
  color: var(--ink-500);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 480px;
}
.hh-stats-row {
  display: flex; gap: 2rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.hh-stats-row > div { font-size: .85rem; color: var(--ink-400); }
.hh-stats-row strong {
  display: block;
  font-size: 1.6rem;
  color: var(--ink-900);
  font-weight: 700;
  font-family: var(--font-en);
  letter-spacing: -.5px;
  line-height: 1.1;
}

.hh-hero-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-3);
  padding: 1.5rem;
  position: relative;
}
.hh-hero-card::before {
  content: 'AI MATCH';
  position: absolute;
  top: -10px; right: 24px;
  background: var(--ink-900);
  color: var(--white);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .65rem;
  font-weight: 600;
  letter-spacing: .8px;
  font-family: var(--font-en);
}
[data-theme="dark"] .hh-hero-card::before { background: var(--accent); color: #fff; }

/* Sections */
.hh-section { padding: 80px 0; }
.hh-section-title {
  font-weight: 700;
  color: var(--ink-900);
  font-size: 2rem;
  letter-spacing: -.8px;
  margin-bottom: .4rem;
  line-height: 1.2;
}
.hh-section-sub { color: var(--ink-400); margin-bottom: 2.5rem; font-size: 1rem; }

/* Cards */
.hh-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: border-color .2s, box-shadow .2s;
}
.hh-card:hover { border-color: var(--ink-200); box-shadow: var(--shadow-1); }

.hh-feature-icon {
  width: 40px; height: 40px;
  border-radius: var(--r-md);
  background: var(--ink-50);
  color: var(--ink-900);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.15rem;
}

/* Hackathon Card */
.hh-hk-card { padding: 1.5rem; }
.hh-hk-org { font-size: .8rem; color: var(--ink-400); font-weight: 500; }
.hh-hk-title {
  font-weight: 600;
  color: var(--ink-900);
  font-size: 1.05rem;
  margin: .35rem 0 .65rem;
  letter-spacing: -.3px;
  line-height: 1.35;
}
.hh-hk-meta { font-size: .82rem; color: var(--ink-400); display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hh-hk-meta i { color: var(--ink-300); margin-left: 4px; }

/* Attendance type badge */
.attend-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 9px;
  border-radius: 5px;
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .2px;
}
.attend-badge.in-person { background: var(--accent-soft); color: var(--accent); }
.attend-badge.remote { background: var(--ok-bg); color: var(--ok); }
.attend-badge.hybrid { background: var(--warn-bg); color: var(--warn); }

.hh-tag {
  display: inline-block;
  font-size: .72rem;
  font-weight: 500;
  padding: 3px 9px;
  border-radius: 5px;
  background: var(--ink-50);
  color: var(--ink-700);
  margin-inline-end: 4px;
  margin-bottom: 4px;
  letter-spacing: .2px;
}
.hh-tag.blue { background: var(--accent-soft); color: var(--accent); }

.hh-match {
  display: inline-flex; align-items: center; gap: 5px;
  font-weight: 600;
  font-size: .78rem;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: var(--font-en);
  letter-spacing: .2px;
}
.hh-match.high { background: var(--ok-bg); color: var(--ok); }
.hh-match.mid { background: var(--warn-bg); color: var(--warn); }
.hh-match.low { background: var(--ink-50); color: var(--ink-500); }

.hh-countdown {
  font-family: var(--font-en);
  font-weight: 600;
  color: var(--ink-700);
  background: var(--ink-50);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: .78rem;
}

/* Chat */
.hh-chat { background: var(--white); border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--shadow-2); overflow: hidden; }
.hh-chat-head { background: var(--ink-900); color: var(--white); padding: 14px 18px; display: flex; align-items: center; gap: 10px; }
[data-theme="dark"] .hh-chat-head { background: var(--accent); }
.hh-chat-body { padding: 18px; background: var(--paper); }
.hh-bubble { max-width: 80%; padding: 10px 14px; border-radius: var(--r-md); margin-bottom: 10px; font-size: .92rem; line-height: 1.6; }
.hh-bubble.bot { background: var(--white); border: 1px solid var(--line); color: var(--ink-900); }
.hh-bubble.user { background: var(--ink-900); color: var(--white); margin-inline-start: auto; border-bottom-right-radius: 4px; }
[data-theme="dark"] .hh-bubble.user { background: var(--accent); color: #fff; }
.hh-chat-input { border-top: 1px solid var(--line); padding: 12px; display: flex; gap: 8px; background: var(--white); }

/* Footer */
.hh-footer { background: var(--ink-900); color: var(--ink-300); padding: 64px 0 32px; margin-top: 80px; }
[data-theme="dark"] .hh-footer { background: var(--ink-50); border-top: 1px solid var(--line); }
.hh-footer h6 { color: var(--white); font-weight: 600; margin-bottom: 16px; font-size: .85rem; letter-spacing: .3px; text-transform: uppercase; }
[data-theme="dark"] .hh-footer h6 { color: var(--ink-900); }
.hh-footer a { color: var(--ink-300); display: block; padding: 4px 0; font-size: .9rem; }
.hh-footer a:hover { color: var(--white); }
[data-theme="dark"] .hh-footer a:hover { color: var(--ink-900); }
.hh-footer .copy { border-top: 1px solid rgba(255,255,255,.08); padding-top: 24px; margin-top: 40px; color: var(--ink-400); font-size: .82rem; }
[data-theme="dark"] .hh-footer .copy { border-color: var(--line); }

/* Dashboard */
.hh-app { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; background: var(--bg); }
@media (max-width: 991px) { .hh-app { grid-template-columns: 1fr; } }

.hh-side {
  background: var(--white);
  border-inline-start: 1px solid var(--line);
  padding: 24px 14px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
@media (max-width: 991px) { .hh-side { position: static; height: auto; } }
.hh-side .brand { padding: 0 8px 22px; border-bottom: 1px solid var(--line); margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }

.hh-side-link {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border-radius: var(--r-md);
  color: var(--ink-500);
  font-weight: 500;
  font-size: .9rem;
  margin-bottom: 2px;
  cursor: pointer;
}
.hh-side-link i { font-size: 1.05rem; color: var(--ink-300); }
.hh-side-link:hover { background: var(--ink-50); color: var(--ink-900); }
.hh-side-link:hover i { color: var(--ink-700); }
.hh-side-link.active { background: var(--ink-900); color: var(--white); }
.hh-side-link.active i { color: var(--white); }
[data-theme="dark"] .hh-side-link.active { background: var(--accent); color: #fff; }
.hh-side .group-label {
  font-size: .68rem;
  color: var(--ink-300);
  font-weight: 600;
  text-transform: uppercase;
  padding: 16px 12px 6px;
  letter-spacing: .8px;
}

.hh-main { padding: 32px 36px; }
@media (max-width: 768px) { .hh-main { padding: 22px 18px; } }
.hh-topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; gap: 12px; flex-wrap: wrap; }
.hh-welcome h2 { font-weight: 700; color: var(--ink-900); margin: 0; font-size: 1.6rem; letter-spacing: -.5px; }
.hh-welcome p { color: var(--ink-400); margin: .25rem 0 0; font-size: .95rem; }

.hh-stat { padding: 18px; display: flex; align-items: center; gap: 14px; }
.hh-stat .ico { width: 42px; height: 42px; border-radius: var(--r-md); display: inline-flex; align-items: center; justify-content: center; font-size: 1.15rem; }
.hh-stat .v { font-weight: 700; color: var(--ink-900); font-size: 1.5rem; font-family: var(--font-en); letter-spacing: -.5px; }
.hh-stat .l { color: var(--ink-400); font-size: .82rem; margin-top: 2px; }

.hh-progress { height: 4px; background: var(--line-soft); border-radius: 999px; overflow: hidden; }
.hh-progress > span { display: block; height: 100%; background: var(--ink-900); transition: width .8s cubic-bezier(.2,.8,.2,1); }
[data-theme="dark"] .hh-progress > span { background: var(--accent); }
.hh-progress.green > span { background: var(--ok); }
.hh-progress.orange > span { background: var(--warn); }

.hh-list-item { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line-soft); }
.hh-list-item:last-child { border-bottom: 0; }

/* Auth */
.hh-auth-wrap {
  min-height: 100vh;
  display: grid; place-items: center;
  padding: 32px 16px;
  background: var(--paper);
  position: relative;
}
.hh-auth-wrap::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 1px 1px, var(--line) 1px, transparent 0);
  background-size: 32px 32px;
  opacity: .5;
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hh-auth-card { background: var(--white); border-radius: var(--r-lg); box-shadow: var(--shadow-3); padding: 40px; max-width: 440px; width: 100%; border: 1px solid var(--line); position: relative; z-index: 1; }
.hh-auth-card.wide { max-width: 600px; }
.hh-auth-card h3 { color: var(--ink-900); font-weight: 700; margin-bottom: .35rem; font-size: 1.6rem; letter-spacing: -.5px; }
.hh-auth-card .sub { color: var(--ink-400); margin-bottom: 1.6rem; font-size: .92rem; }

.form-control, .form-select {
  border-radius: var(--r-md);
  padding: .65rem .9rem;
  border-color: var(--line);
  font-size: .92rem;
  background: var(--white);
  color: var(--ink-900);
}
.form-control:focus, .form-select:focus {
  border-color: var(--ink-900);
  box-shadow: 0 0 0 3px var(--ink-50);
  background: var(--white);
  color: var(--ink-900);
}
[data-theme="dark"] .form-control:focus, [data-theme="dark"] .form-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-control::placeholder { color: var(--ink-300); }
.form-label { font-weight: 500; color: var(--ink-700); font-size: .85rem; margin-bottom: .4rem; }

/* Misc */
.divider { height: 1px; background: var(--line); margin: 24px 0; }

.skill-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 11px;
  border-radius: 5px;
  font-size: .8rem;
  font-weight: 500;
  margin: 3px;
  background: var(--ink-50);
  color: var(--ink-700);
  border: 1px solid var(--line);
}
.skill-pill.matched { background: var(--ok-bg); color: var(--ok); border-color: rgba(13,138,93,.2); }
.skill-pill.missing { background: var(--ink-50); color: var(--ink-400); border-color: var(--line); }

.qr-box {
  width: 180px; height: 180px;
  border-radius: var(--r-md);
  background: var(--white);
  border: 1px solid var(--line);
  display: grid; place-items: center;
  padding: 10px;
  margin: 0 auto;
}
.qr-box img { width: 100%; height: 100%; object-fit: contain; }

.partners { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; justify-content: center; }
.partner-chip { background: var(--white); border: 1px solid var(--line); padding: 8px 16px; border-radius: var(--r-md); font-weight: 500; color: var(--ink-700); font-size: .85rem; }

.search-box { position: relative; }
.search-box i { position: absolute; inset-inline-start: 14px; top: 50%; transform: translateY(-50%); color: var(--ink-300); }
.search-box .form-control { padding-inline-start: 40px; }

/* Detail header */
.hh-detail-header { background: var(--ink-900); color: var(--white); border-radius: var(--r-lg); padding: 32px; position: relative; overflow: hidden; }
[data-theme="dark"] .hh-detail-header { background: var(--accent); }
.hh-detail-header h1 { font-size: 1.8rem; font-weight: 700; letter-spacing: -.5px; }

/* Tables */
.table { color: var(--ink-900); font-size: .9rem; }
.table thead th {
  font-weight: 600;
  color: var(--ink-500);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .3px;
  border-bottom: 1px solid var(--line);
  padding: 14px;
  background: var(--surface-2);
}
.table tbody td { padding: 14px; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
.table tbody tr:hover { background: var(--ink-50); }

/* Alerts */
.alert { border-radius: var(--r-md); border-width: 1px; font-size: .9rem; padding: .7rem 1rem; }
.alert-success { background: var(--ok-bg); border-color: rgba(13,138,93,.2); color: var(--ok); }
.alert-info { background: var(--accent-soft); border-color: var(--accent-line); color: var(--accent); }
.alert-warning { background: var(--warn-bg); border-color: rgba(178,94,9,.2); color: var(--warn); }
.alert-danger { background: var(--err-bg); border-color: rgba(184,32,58,.2); color: var(--err); }

/* WhatsApp privacy lock */
.privacy-lock {
  background: var(--surface-2);
  border: 1px dashed var(--line);
  border-radius: var(--r-md);
  padding: 20px;
  text-align: center;
}
.privacy-lock i { font-size: 1.5rem; color: var(--ink-400); margin-bottom: 8px; display: block; }
.privacy-lock p { color: var(--ink-500); font-size: .9rem; margin: 0; }