@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;0,900;1,400;1,600&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,600;1,8..60,300;1,8..60,400&family=DM+Mono:wght@300;400;500&display=swap');

/* ── Variables ──────────────────────────────────────────────── */
:root {
  --ink:           #0a0e1a;
  --navy-deep:     #0d1224;
  --navy:          #111827;
  --navy-mid:      #161e30;
  --navy-light:    #1c2640;
  --navy-card:     #18213a;
  --navy-hover:    #1f2d4a;

  --gold:          #c9a84c;
  --gold-bright:   #e4c06e;
  --gold-dim:      #7a5f28;
  --gold-pale:     #f5e6c0;
  --gold-glow:     rgba(201,168,76,0.10);

  --text:          #d4c9b0;
  --text-bright:   #f0e8d5;
  --text-dim:      #6e7a94;
  --text-faint:    #3d4a60;

  --amber:         #d4842a;
  --red-soft:      #c0392b;
  --green-soft:    #3d8b5e;

  --border:        rgba(201,168,76,0.10);
  --border-mid:    rgba(201,168,76,0.20);
  --border-strong: rgba(201,168,76,0.38);

  --shadow-card:   0 4px 28px rgba(0,0,0,0.45), 0 1px 0 rgba(201,168,76,0.05) inset;
  --shadow-hover:  0 8px 44px rgba(0,0,0,0.6), 0 0 0 1px rgba(201,168,76,0.14);
  --shadow-gold:   0 0 24px rgba(201,168,76,0.18);

  --font-display:  'Playfair Display', Georgia, serif;
  --font-body:     'Source Serif 4', Georgia, serif;
  --font-mono:     'DM Mono', 'Courier New', monospace;

  --radius-sm:  6px;
  --radius:     10px;
  --radius-lg:  16px;
  --radius-xl:  22px;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { background: var(--ink); scroll-behavior: smooth; }

* {
  box-sizing: border-box;
}

html, body {
  overflow-x: hidden;
}

img, div {
  max-width: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  background:
    radial-gradient(ellipse 110% 55% at 50% -5%,  rgba(28,38,64,0.95) 0%, transparent 65%),
    radial-gradient(ellipse 55%  45% at 0%   100%, rgba(201,168,76,0.03) 0%, transparent 55%),
    radial-gradient(ellipse 45%  50% at 100% 85%,  rgba(212,132,42,0.03) 0%, transparent 55%),
    var(--navy-deep);
  color: var(--text);
  overscroll-behavior: auto;
  min-height: 100vh;
  padding-top: 64px;
}

::selection { background: var(--gold-dim); color: var(--gold-pale); }

/* subtle noise texture */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9000;
}

/* ── Page wrapper ───────────────────────────────────────────── */
.page-wrapper { position: relative; z-index: 1; display: flex; flex-direction: column; min-height: 100vh; }
.main-content { flex: 1; }

#particles-bg { position: fixed; inset: 0; z-index: 0; pointer-events: none; }

/* ================================================================
   NAVBAR
================================================================ */
.navbar {
  position: fixed;
  width: 100%;;
  height: 64px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 48px;
  background: rgba(10,14,26,0.94);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  top: 0;
  z-index: 500;
}

.navbar::after {
  content: '';
  position: absolute;
  bottom: 0; left: 48px; right: 48px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dim), var(--gold), var(--gold-dim), transparent);
  opacity: 0.45;
}

.logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  font-style: italic;
  color: var(--gold);
  text-decoration: none;
  letter-spacing: 0.4px;
  transition: color 0.2s;
}
.logo:hover { color: var(--gold-bright); }

.nav-links { display: flex; gap: 4px; align-items: center; }

.nav-links a {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  color: var(--text-dim);
  text-decoration: none;
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.8px;
  text-transform: uppercase;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.nav-links a:hover {
  color: var(--gold-bright);
  background: var(--gold-glow);
  border-color: var(--border-mid);
}

/* ================================================================
   FOOTER
================================================================ */
footer {
  text-align: center;
  padding: 28px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 1.5px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
  position: relative;
}
footer::before {
  content: '✦';
  position: absolute;
  top: -9px; left: 50%; transform: translateX(-50%);
  background: var(--navy-deep);
  padding: 0 10px;
  color: var(--gold-dim);
  font-size: 12px;
}

/* ================================================================
   CARDS
================================================================ */
.card {
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin: 16px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.3s, border-color 0.3s;
  animation: fadeUp 0.45s cubic-bezier(0.22,1,0.36,1) both;
}
.card:nth-child(2) { animation-delay: 0.07s; }
.card:nth-child(3) { animation-delay: 0.14s; }

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 32px; right: 32px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
  opacity: 0.55;
}

.card:hover { box-shadow: var(--shadow-hover); border-color: var(--border-mid); }

.card h2 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 20px;
  letter-spacing: 0.2px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.card h2::before {
  content: '';
  display: inline-block;
  width: 3px; height: 18px;
  background: linear-gradient(180deg, var(--gold), var(--amber));
  border-radius: 2px;
  flex-shrink: 0;
}

/* ================================================================
   INPUTS
================================================================ */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
.input-field {
  width: 100%;
  padding: 13px 16px;
  margin-bottom: 14px;
  background: rgba(10,14,26,0.55);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  color: var(--text-bright);
  font-family: var(--font-body);
  font-size: 15px;
  transition: all 0.22s;
  outline: none;
}
input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
.input-field:focus {
  border-color: var(--gold);
  background: rgba(10,14,26,0.8);
  box-shadow: 0 0 0 3px var(--gold-glow);
}
input::placeholder { color: var(--text-faint); font-style: italic; }

label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 6px;
  margin-top: 12px;
}

textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(10,14,26,0.55);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  color: var(--text-bright);
  font-family: var(--font-body);
  font-size: 15px;
  resize: vertical;
  min-height: 80px;
  outline: none;
  transition: all 0.22s;
}
textarea:focus { border-color: var(--gold); box-shadow: 0 0 0 3px var(--gold-glow); }

/* ================================================================
   BUTTONS
================================================================ */
.neon-btn {
  display: inline-block;
  margin-top: 15px;
  padding: 11px 28px;
  background: linear-gradient(135deg, var(--gold-dim), var(--amber));
  border: 1px solid var(--gold);
  border-radius: var(--radius-sm);
  color: var(--navy-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.22s ease;
  position: relative;
  overflow: hidden;
}
.neon-btn::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
  transition: left 0.4s;
}
.neon-btn:hover {
  background: linear-gradient(135deg, var(--gold), var(--gold-bright));
  box-shadow: var(--shadow-gold);
  transform: translateY(-1px);
  color: var(--ink);
}
.neon-btn:hover::after { left: 100%; }
.neon-btn:active { transform: translateY(0); }

.danger-btn {
  display: inline-block;
  padding: 11px 24px;
  background: transparent;
  border: 1px solid rgba(192,57,43,0.4);
  border-radius: var(--radius-sm);
  color: #e07060;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
  margin-top: 10px;
  transition: all 0.22s;
}
.danger-btn:hover {
  background: rgba(192,57,43,0.10);
  border-color: #c0392b;
  color: #f08070;
  box-shadow: 0 0 16px rgba(192,57,43,0.18);
}

.cancel-btn {
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.8px;
  padding: 10px 20px;
  cursor: pointer;
  transition: all 0.2s;
}
.cancel-btn:hover { color: var(--text); border-color: var(--text-faint); background: rgba(255,255,255,0.02); }

.download-btn {
  display: inline-block;
  padding: 11px 24px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  background: transparent;
  border: 1px solid var(--border-mid);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  transition: all 0.22s;
}
.download-btn:hover { border-color: var(--gold); color: var(--gold); background: var(--gold-glow); }

.convert-btn {
  margin-top: 20px;
  width: 100%;
  padding: 13px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.22s;
}
.convert-btn:hover { border-color: var(--gold); color: var(--gold-bright); background: var(--gold-glow); box-shadow: var(--shadow-gold); }

.upload-btn {
  display: inline-block;
  margin-top: 10px;
  padding: 9px 20px;
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.22s;
}
.upload-btn:hover { border-color: var(--gold-dim); color: var(--gold); background: var(--gold-glow); }

/* ================================================================
   MESSAGES
================================================================ */
.error-message {
  background: rgba(192,57,43,0.07);
  border: 1px solid rgba(192,57,43,0.28);
  border-left: 3px solid var(--red-soft);
  color: #e08070;
  padding: 12px 16px;
  margin-bottom: 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
}
.success-message {
  background: rgba(61,139,94,0.07);
  border: 1px solid rgba(61,139,94,0.28);
  border-left: 3px solid var(--green-soft);
  color: #70c090;
  padding: 12px 16px;
  margin-bottom: 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 13px;
}
.verify-error { color: #e08070; font-family: var(--font-mono); font-size: 13px; text-align: center; margin-bottom: 15px; }

/* ================================================================
   LOGIN / AUTH LAYOUT
================================================================ */
.center-body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 70px);
}
.login-container {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 48px 20px;
  min-height: calc(100vh - 70px);
}

.login-card {
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 52px 48px;
  width: 440px;
  max-width: 100%;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card), 0 0 80px rgba(0,0,0,0.5);
  animation: fadeUp 0.5s cubic-bezier(0.22,1,0.36,1) both;
}
.login-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, transparent 5%, var(--gold-dim) 20%, var(--gold) 50%, var(--gold-dim) 80%, transparent 95%);
}
.login-card::after {
  content: '◆';
  position: absolute;
  top: 12px; left: 50%; transform: translateX(-50%);
  font-size: 8px;
  color: var(--gold);
  opacity: 0.65;
}

.login-card .logo {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  font-style: italic;
  color: var(--gold);
  text-decoration: none;
  display: block;
  margin-bottom: 4px;
}
.login-card h2 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 400;
  font-style: italic;
  color: var(--text);
  margin-bottom: 4px;
}
.login-card h2::before { display: none; }

.subtitle {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-faint);
  margin-bottom: 28px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.login-card form { position: relative; padding-top: 20px; }
.login-card form::before {
  content: '';
  position: absolute;
  top: 0; left: 20%; right: 20%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-mid), transparent);
}
.login-card input { box-sizing: border-box; text-align: left; }
.login-card .neon-btn { width: 100%; margin-top: 6px; padding: 13px; font-size: 11px; letter-spacing: 2.5px; }

.extra-links { margin-top: 14px; text-align: right; }
.extra-links a { font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); text-decoration: none; letter-spacing: 0.5px; transition: color 0.2s; }
.extra-links a:hover { color: var(--gold); }

.register-link { margin-top: 20px; font-family: var(--font-mono); font-size: 12px; color: var(--text-dim); }
.register-link a { color: var(--gold); text-decoration: none; margin-left: 4px; }
.register-link a:hover { color: var(--gold-bright); text-decoration: underline; }

.bottom-text { margin-top: 20px; font-family: var(--font-mono); font-size: 12px; color: var(--text-dim); }
.bottom-text a { color: var(--gold); text-decoration: none; }
.bottom-text a:hover { color: var(--gold-bright); }

/* ================================================================
   HOME PAGE
================================================================ */
.hero {
  text-align: center;
  padding: 100px 20px 80px;
  position: relative;
}
.hero::before {
  content: '— ◆ —';
  display: block;
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--gold-dim);
  letter-spacing: 8px;
  margin-bottom: 32px;
  opacity: 0.7;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%; transform: translateX(-50%);
  width: 120px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5.5vw, 58px);
  font-weight: 900;
  line-height: 1.15;
  color: var(--text-bright);
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}
.hero h1 span { color: var(--gold); font-style: italic; }

.hero p {
  max-width: 620px;
  margin: 0 auto 40px;
  font-size: 18px;
  line-height: 1.85;
  color: var(--text-dim);
  font-weight: 300;
}
.hero-btn { margin-top: 0; padding: 14px 44px; font-size: 11px; letter-spacing: 3px; text-decoration: none; }

.features { display: flex; justify-content: center; flex-wrap: wrap; padding: 60px 20px; gap: 24px; }

.feature-card { width: 280px; text-align: center; padding: 36px 28px; }
.feature-card h2 { font-size: 18px; font-family: var(--font-display); font-weight: 600; color: var(--gold-bright); margin-bottom: 14px; justify-content: center; }
.feature-card h2::before { display: none; }
.feature-card p { font-size: 15px; line-height: 1.8; color: var(--text-dim); font-weight: 300; }

.how-it-works { text-align: center; padding: 60px 20px 90px; }
.how-it-works h2 { font-family: var(--font-display); font-size: 32px; font-weight: 600; font-style: italic; color: var(--text-bright); margin-bottom: 48px; }
.how-it-works h2::before { display: none; }

.steps { display: flex; justify-content: center; flex-wrap: wrap; gap: 24px; }
.step {
  width: 240px;
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  position: relative;
  transition: all 0.3s;
  animation: fadeUp 0.45s cubic-bezier(0.22,1,0.36,1) both;
}
.step:nth-child(2) { animation-delay: 0.1s; }
.step:nth-child(3) { animation-delay: 0.2s; }
.step::before { content: ''; position: absolute; top: 0; left: 32px; right: 32px; height: 1px; background: linear-gradient(90deg, transparent, var(--gold-dim), transparent); }
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--border-mid); }
.step h3 { font-family: var(--font-display); font-size: 17px; font-weight: 600; font-style: italic; color: var(--gold-bright); margin-bottom: 10px; }
.step p { font-size: 14px; color: var(--text-dim); line-height: 1.7; }

/* ================================================================
   DASHBOARD
================================================================ */
.dashboard-container { display: flex; justify-content: center; gap: 20px; padding: 40px 20px; flex-wrap: wrap; align-items: flex-start; }
.upload-card { width: 480px; }
.stats-card  { width: 260px; }

.stat-box {
  background: rgba(10,14,26,0.5);
  border: 1px solid var(--border);
  padding: 22px;
  margin-top: 16px;
  border-radius: var(--radius);
  text-align: center;
  transition: all 0.3s;
  position: relative;
}
.stat-box::after { content: ''; position: absolute; bottom: 0; left: 20%; right: 20%; height: 1px; background: linear-gradient(90deg, transparent, var(--gold-dim), transparent); opacity: 0; transition: opacity 0.3s; }
.stat-box:hover { border-color: var(--border-mid); }
.stat-box:hover::after { opacity: 1; }
.stat-box p { font-family: var(--font-mono); font-size: 10px; letter-spacing: 2px; text-transform: uppercase; color: var(--text-faint); margin-bottom: 8px; }
.stat-box h3 { font-family: var(--font-display); font-size: 40px; font-weight: 700; color: var(--gold); line-height: 1; }

.drop-area {
  border: 1px dashed var(--border-mid);
  border-radius: var(--radius);
  padding: 40px 30px;
  text-align: center;
  margin-top: 20px;
  transition: all 0.3s;
  cursor: pointer;
  background: rgba(10,14,26,0.35);
}
.drop-area:hover { border-color: var(--gold-dim); background: var(--gold-glow); }
.drop-area.dragover { border-color: var(--gold); background: var(--gold-glow); }
.drop-area p { font-family: var(--font-body); font-size: 15px; color: var(--text-dim); font-style: italic; margin: 0; }
.drop-area span { display: block; margin: 12px 0; color: var(--text-faint); font-family: var(--font-mono); font-size: 10px; letter-spacing: 2px; text-transform: uppercase; }

.file-name { margin-top: 12px; font-family: var(--font-mono); font-size: 13px; color: var(--gold); }
.analyze-btn { margin-top: 20px; width: 100%; padding: 14px; font-size: 11px; letter-spacing: 3px; }

.tool-card { text-align: center; }
.tool-desc { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); letter-spacing: 0.5px; margin-bottom: 16px; font-style: italic; }

.tool-drop { border: 1px dashed var(--border); padding: 24px; border-radius: var(--radius); cursor: pointer; transition: all 0.3s; background: rgba(10,14,26,0.3); }
.tool-drop:hover { border-color: var(--border-mid); background: rgba(10,14,26,0.5); }
.tool-drop p { font-family: var(--font-body); font-size: 14px; margin: 0; color: var(--text-dim); font-style: italic; }
.tool-drop span { display: block; margin: 10px 0; font-family: var(--font-mono); font-size: 10px; letter-spacing: 2px; text-transform: uppercase; color: var(--text-faint); }
.tool-drop button { background: transparent; border: 1px solid var(--border-mid); border-radius: var(--radius-sm); padding: 8px 18px; color: var(--text-dim); font-family: var(--font-mono); font-size: 10px; letter-spacing: 1px; text-transform: uppercase; cursor: pointer; transition: all 0.22s; }
.tool-drop button:hover { border-color: var(--gold-dim); color: var(--gold); background: var(--gold-glow); }
.supported-text { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); margin-top: 12px; letter-spacing: 0.5px; }

/* Lecture History */
.lecture-history-section { display: flex; justify-content: center; margin-top: 10px; padding: 0 20px; }
.lecture-history { width: 580px; }
.lecture-list { list-style: none; padding: 0; margin-top: 16px; }
.lecture-list li { margin-bottom: 10px; }
.lecture-row { display: flex; align-items: center; gap: 10px; }

.lecture-btn {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(10,14,26,0.4);
  border: 1px solid var(--border);
  padding: 14px 18px;
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
}
.lecture-btn:hover { border-color: var(--border-mid); background: var(--gold-glow); color: var(--text-bright); }
.lecture-left { font-weight: 400; }
.lecture-date { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); letter-spacing: 0.5px; white-space: nowrap; margin-left: 12px; }

.delete-btn { background: transparent; border: 1px solid rgba(192,57,43,0.22); color: rgba(192,57,43,0.55); padding: 9px 12px; border-radius: var(--radius-sm); text-decoration: none; font-size: 14px; transition: all 0.2s; line-height: 1; }
.delete-btn:hover { background: rgba(192,57,43,0.08); border-color: rgba(192,57,43,0.5); color: #e07060; }

/* Analysis Section */
.analysis-section { display: flex; justify-content: center; padding: 20px; box-sizing: border-box; }
.analysis-section .card { width: 100%;   max-width: 500px; }

.pdf-name { font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); margin-bottom: 18px; padding: 8px 14px; background: rgba(10,14,26,0.5); border-radius: var(--radius-sm); border-left: 2px solid var(--gold-dim); font-style: italic; letter-spacing: 0.3px; }

.result-text {   word-wrap: break-word; overflow-wrap: break-word; font-family: var(--font-body); font-size: 16px; line-height: 1.9; color: var(--text); font-weight: 300; }

.highlight-list { padding: 0; list-style: none; }
.highlight-list li { padding: 11px 12px 11px 20px; border-bottom: 1px solid var(--border); font-family: var(--font-body); font-size: 15px; color: var(--text); line-height: 1.65; position: relative; font-weight: 300; }
.highlight-list li::before { content: '◆'; position: absolute; left: 0; top: 14px; color: var(--gold); font-size: 7px; }
.highlight-list li:last-child { border-bottom: none; }

.question { font-family: var(--font-display); font-size: 17px; font-weight: 600; color: var(--text-bright); line-height: 1.6; margin-bottom: 18px; }

.option { display: flex; align-items: center; gap: 12px; padding: 13px 18px; margin-bottom: 10px; border: 1px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; transition: all 0.2s; font-family: var(--font-body); font-size: 15px; color: var(--text); background: rgba(10,14,26,0.3); }
.option:hover { border-color: var(--border-mid); background: var(--gold-glow); color: var(--text-bright); }
.option input[type="radio"] { width: auto; margin: 0; padding: 0; border: none; accent-color: var(--gold); }

/* Loading Screen */
.loading-screen { position: fixed; inset: 0; background: rgba(10,14,26,0.97); display: none; place-items: center; z-index: 9999; }

.loader-box {
  background: var(--navy-card);
  padding: 52px 72px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-mid);
  box-shadow: var(--shadow-card), var(--shadow-gold);
  text-align: center;
  min-width: 380px;
  position: relative;
  overflow: hidden;
}
.loader-box::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, transparent, var(--gold-dim), var(--gold), var(--gold-dim), transparent); }
.loader-box h2 { font-family: var(--font-display); font-size: 22px; font-weight: 600; font-style: italic; color: var(--text-bright); margin-bottom: 24px; }
.loader-box h2::before { display: none; }
.loader-box p { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); letter-spacing: 1.2px; margin: 8px 0; text-transform: uppercase; }

.spinner { margin: 32px auto 0; width: 52px; height: 52px; position: relative; }
.spinner::before, .spinner::after { content: ''; position: absolute; border-radius: 50%; }
.spinner::before { inset: 0; border: 2px solid var(--border); border-top-color: var(--gold); animation: spin 1.1s linear infinite; }
.spinner::after { inset: 10px; border: 1px solid transparent; border-top-color: var(--gold-dim); animation: spin 0.6s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ================================================================
   PROFILE PAGE
================================================================ */
.profile-container { display: flex; justify-content: center; gap: 24px; padding: 50px 20px; flex-wrap: wrap; align-items: flex-start; }
.profile-card  { width: 420px; }
.security-card { width: 420px; }

.profile-info p { padding: 13px 0; border-bottom: 1px solid var(--border); font-family: var(--font-body); font-size: 15px; color: var(--text-dim); display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.profile-info p strong { font-family: var(--font-mono); font-size: 10px; letter-spacing: 2px; text-transform: uppercase; color: var(--text-faint); font-weight: 400; flex-shrink: 0; }
.profile-info p:last-child { border-bottom: none; }
.profile-card .neon-btn { width: 100%; margin-top: 22px; display: block; text-align: center; }

.security-card hr { margin: 24px 0; border: 0; border-top: 1px solid var(--border); }
.security-card h3 { font-family: var(--font-display); font-size: 15px; font-weight: 600; color: #e07060; margin-bottom: 10px; }
.security-card h3::before { display: none; }
.security-card p { font-size: 14px; color: var(--text-dim); line-height: 1.7; margin-bottom: 14px; font-weight: 300; }
.security-card .neon-btn { width: 100%; display: block; text-align: center; }
.security-card input { width: 100%; padding: 11px 14px; margin-top: 8px; background: rgba(10,14,26,0.5); border: 1px solid var(--border-mid); border-radius: var(--radius-sm); color: var(--text-bright); font-family: var(--font-body); font-size: 15px; }

/* ================================================================
   MODALS
================================================================ */
.modal { position: fixed; inset: 0; background: rgba(10,14,26,0.9); backdrop-filter: blur(10px); display: none; justify-content: center; align-items: center; z-index: 9999; }
.modal.show { display: flex; }

.modal-content {
  background: var(--navy-card);
  border: 1px solid var(--border-mid);
  padding: 52px 48px;
  width: 460px;
  max-width: 92vw;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card), 0 0 80px rgba(0,0,0,0.6);
  text-align: center;
  animation: fadeUp 0.3s cubic-bezier(0.22,1,0.36,1);
  position: relative;
  overflow: hidden;
}
.modal-content::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, transparent, var(--gold-dim), var(--gold), var(--gold-dim), transparent); }
.modal-content h2 { font-family: var(--font-display); font-size: 22px; font-weight: 600; font-style: italic; color: var(--text-bright); margin-bottom: 12px; justify-content: center; }
.modal-content h2::before { display: none; }
.modal-content p { font-size: 15px; color: var(--text-dim); line-height: 1.75; margin-bottom: 24px; font-weight: 300; }
.modal-content input { box-sizing: border-box; text-align: left; }
.modal-content label { text-align: left; }
.modal-buttons { display: flex; justify-content: center; gap: 14px; margin-top: 10px; flex-wrap: wrap; align-items: center; }

.danger-modal::before { background: linear-gradient(90deg, transparent, rgba(192,57,43,0.35), #c0392b, rgba(192,57,43,0.35), transparent); }
.danger-modal h2 { color: #e07060 !important; }

/* ================================================================
   CONVERT BANNER
================================================================ */
.convert-banner {
  position: fixed;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 440px; padding: 36px;
  background: var(--navy-card);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-xl);
  text-align: center;
  z-index: 9999;
  box-shadow: var(--shadow-card), var(--shadow-gold);
  animation: fadeUp 0.3s cubic-bezier(0.22,1,0.36,1);
  overflow: hidden;
}
.convert-banner::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, transparent, var(--gold-dim), var(--gold), var(--gold-dim), transparent); }
.convert-banner p { font-family: var(--font-body); font-size: 15px; color: var(--text); margin-bottom: 6px; line-height: 1.6; }
.banner-overlay { position: fixed; inset: 0; background: rgba(10,14,26,0.75); backdrop-filter: blur(6px); z-index: 9998; }
.banner-buttons { margin-top: 24px; display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; align-items: center; }

/* ================================================================
   AUTH CARDS
================================================================ */
.center-wrapper { display: flex; justify-content: center; align-items: center; min-height: 70vh; }
.auth-card { background: var(--navy-card); border: 1px solid var(--border); padding: 52px 48px; border-radius: var(--radius-xl); box-shadow: var(--shadow-card); max-width: 460px; width: 90%; text-align: center; position: relative; overflow: hidden; }
.auth-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, transparent, var(--gold-dim), var(--gold), var(--gold-dim), transparent); }
.auth-card h2 { font-family: var(--font-display); font-size: 22px; font-weight: 600; font-style: italic; color: var(--text-bright); margin-bottom: 12px; justify-content: center; }
.auth-card h2::before { display: none; }
.auth-subtext { font-family: var(--font-body); font-size: 15px; color: var(--text-dim); margin-bottom: 28px; line-height: 1.75; font-weight: 300; }
.full-btn { display: block; width: 100%; text-align: center; }

/* ================================================================
   ANIMATIONS
================================================================ */
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ================================================================
   SCROLLBAR
================================================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: var(--gold-dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold); }



/* ================================================================
   RESPONSIVE
================================================================ */

/* ── Tablet: 641px – 1024px ─────────────────────────────────── */
@media (max-width: 1024px) {
  .navbar { padding: 0 28px; }
  .navbar::after { left: 28px; right: 28px; }

  .upload-card { width: 100%; max-width: 580px; }
  .stats-card  { width: 100%; max-width: 580px; }
  .dashboard-container { flex-direction: column; align-items: center; padding: 28px 16px; }

  .profile-card  { width: 100%; max-width: 560px; }
  .security-card { width: 100%; max-width: 560px; }
  .profile-container { flex-direction: column; align-items: center; padding: 32px 16px; }

  .lecture-history { width: 100%; max-width: 580px; }
  .analysis-section .card { width: 100%; max-width: 580px; }

  .step         { width: calc(50% - 12px); min-width: 200px; }
  .feature-card { width: calc(50% - 12px); min-width: 220px; }

  .convert-banner { width: 90vw; max-width: 440px; }
}

/* ── Mobile: ≤ 640px ────────────────────────────────────────── */
@media (max-width: 640px) {
  .navbar { padding: 0 16px; height: 56px; }
  .navbar::after { left: 16px; right: 16px; }
  .nav-links { gap: 2px; }
  .nav-links a { padding: 6px 10px; font-size: 10px; letter-spacing: 0.4px; }

  .card { padding: 22px 18px; margin: 10px 0; }

  .hero { padding: 56px 16px 44px; }
  .hero p { font-size: 16px; }
  .hero-btn { padding: 13px 28px; letter-spacing: 2px; }

  .features      { padding: 36px 16px; gap: 16px; }
  .feature-card  { width: 100%; padding: 28px 20px; }
  .how-it-works  { padding: 40px 16px 60px; }
  .how-it-works h2 { font-size: 26px; margin-bottom: 32px; }
  .steps         { gap: 16px; }
  .step          { width: 100%; }

  .login-card { padding: 36px 22px; }
  .login-container { padding: 32px 16px; }

  .dashboard-container { padding: 16px 10px; gap: 12px; }
  .upload-card, .stats-card { width: 100%; }
  .drop-area { padding: 28px 16px; }
  .stat-box h3 { font-size: 32px; }

  .profile-container { padding: 24px 10px; gap: 12px; }
  .profile-card, .security-card { width: 100%; }
  .profile-info p { flex-direction: column; align-items: flex-start; gap: 4px; }

  .lecture-history-section { padding: 0 10px; }
  .lecture-history { width: 100%; }
  .lecture-btn { font-size: 14px; padding: 12px 14px; }
  .lecture-date { display: none; }

  .analysis-section { display: block; padding: 10px; }
  .analysis-section .card { width: 100%; }
  

  .loader-box { padding: 36px 24px; min-width: auto; width: 88vw; }
  .loader-box h2 { font-size: 18px; }

  .modal-content { padding: 36px 20px; width: 94vw; }
  .modal-buttons { flex-direction: column; gap: 10px; }
  .modal-buttons .neon-btn,
  .modal-buttons .cancel-btn,
  .modal-buttons .danger-btn { width: 100%; text-align: center; }

  .convert-banner { width: 92vw; padding: 28px 20px; }
  .banner-buttons { flex-direction: column; gap: 10px; }
  .banner-buttons .neon-btn,
  .banner-buttons .cancel-btn { width: 100%; text-align: center; }

  .auth-card { padding: 36px 22px; }

  .neon-btn   { padding: 12px 22px; }
  .danger-btn { padding: 11px 18px; }

  footer { padding: 22px 16px; letter-spacing: 0.8px; }
}

/* ── Very small phones: ≤ 380px ─────────────────────────────── */
@media (max-width: 380px) {
  .nav-links a { padding: 5px 7px; font-size: 9px; }
  .hero h1     { font-size: 28px; }
  .hero p      { font-size: 15px; }
  .card        { padding: 18px 14px; }
  .login-card  { padding: 28px 16px; }
  .stat-box h3 { font-size: 28px; }
}