/* ═══════════════════════════════════════
   SKYDRILL — Dark Premium Design System
   ═══════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg: #060810;
  --bg-raised: #0c0f18;
  --bg-card: rgba(255,255,255,0.025);
  --bg-card-hover: rgba(255,255,255,0.045);
  --bg-input: rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.14);
  --text-primary: #eef0f4;
  --text-secondary: #8b8fa3;
  --text-tertiary: #5a5e72;
  --accent: #6ee7a0;
  --accent-dim: rgba(110,231,160,0.12);
  --accent-glow: rgba(110,231,160,0.2);
  --success: #6ee7a0;
  --success-bg: rgba(110,231,160,0.1);
  --error: #f87171;
  --error-bg: rgba(248,113,113,0.1);
  --amber: #fbbf24;
  --amber-bg: rgba(251,191,36,0.1);
  --blue: #60a5fa;
  --blue-bg: rgba(96,165,250,0.1);
  --purple: #a78bfa;
  --purple-bg: rgba(167,139,250,0.1);
  --shadow-glow: 0 0 40px rgba(110,231,160,0.06);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
}

*{margin:0;padding:0;box-sizing:border-box}

body {
  font-family: 'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ─── GLASS UTILITY ─── */
.glass {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  position: relative;
}

.glass::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(180deg,
    rgba(255,255,255,0.12) 0%,
    rgba(255,255,255,0.03) 40%,
    rgba(255,255,255,0) 60%,
    rgba(255,255,255,0.04) 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* ─── AUTH ─── */
.auth-overlay {
  position: fixed; inset: 0;
  background: var(--bg);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  background-image: radial-gradient(ellipse at 50% 0%, rgba(110,231,160,0.04) 0%, transparent 60%);
}
.auth-overlay.hidden{display:none}
.auth-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 40px;
  width: 100%; max-width: 420px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5), var(--shadow-glow);
}
.auth-logo{text-align:center;margin-bottom:36px}
.auth-logo h1{font-size:28px;font-weight:700;letter-spacing:-0.03em;color:var(--text-primary)}
.auth-logo p{color:var(--text-tertiary);font-size:14px;margin-top:8px}
.auth-tabs{display:flex;gap:2px;background:rgba(255,255,255,0.04);border-radius:var(--radius-sm);padding:3px;margin-bottom:28px}
.auth-tab{flex:1;text-align:center;padding:8px;border:none;background:none;font-family:inherit;font-size:13px;font-weight:500;color:var(--text-tertiary);cursor:pointer;border-radius:8px;transition:all var(--transition)}
.auth-tab.active{color:var(--text-primary);background:rgba(255,255,255,0.06);font-weight:600}
.auth-field{margin-bottom:16px}
.auth-field label{display:block;font-size:13px;font-weight:500;color:var(--text-secondary);margin-bottom:6px}
.auth-field input{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);font-family:inherit;font-size:14px;outline:none;transition:all var(--transition);background:var(--bg-input);color:var(--text-primary)}
.auth-field input::placeholder{color:var(--text-tertiary)}
.auth-field input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}
.auth-btn{width:100%;padding:12px;border:none;background:var(--accent);color:#060810;font-family:inherit;font-size:14px;font-weight:600;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);margin-top:8px}
.auth-btn:hover{opacity:0.9;box-shadow:0 0 24px var(--accent-glow)}
.auth-btn:disabled{opacity:0.4;cursor:not-allowed}
.auth-error{color:var(--error);font-size:13px;margin-top:12px;text-align:center;min-height:20px}
.auth-form.hidden{display:none}

/* ─── TOPBAR ─── */
.topbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: 64px;
  background: rgba(6,8,16,0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 28px; z-index: 100; gap: 20px;
}
.logo{font-weight:700;font-size:19px;display:flex;align-items:center;gap:10px;white-space:nowrap;user-select:none;cursor:pointer;text-decoration:none;color:var(--text-primary);letter-spacing:-0.02em}
.logo-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--accent),#34d399);border-radius:9px;display:flex;align-items:center;justify-content:center}
.logo-icon svg{width:18px;height:18px}
.nav-links{display:flex;gap:2px;flex:1;overflow-x:auto;scrollbar-width:none}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{background:none;border:none;color:var(--text-tertiary);font-family:inherit;font-size:13px;font-weight:500;padding:8px 14px;cursor:pointer;border-radius:8px;transition:all var(--transition);white-space:nowrap;text-decoration:none;display:inline-block}
.nav-links a:hover{color:var(--text-primary);background:rgba(255,255,255,0.04)}
.nav-links a.active{color:var(--accent);background:var(--accent-dim)}
.user-menu{display:flex;align-items:center;gap:10px;white-space:nowrap}
.rank-badge{display:flex;align-items:center;gap:6px;padding:4px 10px 4px 6px;background:rgba(255,255,255,0.04);border:1px solid var(--border);border-radius:20px;font-size:12px;font-weight:600;color:var(--text-secondary)}
.rank-badge .rank-icon{font-size:16px}
.user-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#34d399);color:#060810;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;cursor:pointer;position:relative}
.dropdown{position:absolute;top:40px;right:0;background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px;box-shadow:0 16px 48px rgba(0,0,0,0.5);min-width:160px;display:none;z-index:200}
.dropdown.open{display:block}
.dropdown a,.dropdown button{display:block;width:100%;text-align:left;padding:8px 12px;border:none;background:none;font-family:inherit;font-size:13px;color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-xs);transition:all var(--transition);text-decoration:none}
.dropdown a:hover,.dropdown button:hover{background:rgba(255,255,255,0.05);color:var(--text-primary)}
.dropdown .logout{color:var(--error)}
.dropdown .logout:hover{background:var(--error-bg)}

/* ─── MAIN ─── */
.main{margin-top:64px;padding:40px 28px;max-width:960px;margin-left:auto;margin-right:auto}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.main{animation:fadeIn 0.4s ease}

/* ─── DASHBOARD ─── */
.dash-welcome{margin-bottom:28px}
.dash-welcome h1{font-size:26px;font-weight:700;letter-spacing:-0.03em}
.dash-welcome p{color:var(--text-tertiary);font-size:14px;margin-top:6px}
.rank-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:16px;display:flex;align-items:center;gap:20px;backdrop-filter:blur(12px)}
.rank-visual{text-align:center;min-width:80px}
.rank-visual .rank-big-icon{font-size:40px;display:block;margin-bottom:4px}
.rank-visual .rank-name{font-family:'JetBrains Mono',monospace;font-size:11px;font-weight:600;color:var(--text-tertiary);letter-spacing:0.04em;text-transform:uppercase}
.rank-info{flex:1}
.rank-info .rank-title{font-size:15px;font-weight:600;margin-bottom:4px}
.rank-info .rank-subtitle{font-size:12px;color:var(--text-tertiary);margin-bottom:10px}
.xp-bar{height:6px;background:rgba(255,255,255,0.06);border-radius:3px;overflow:hidden}
.xp-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),#34d399);border-radius:3px;transition:width 0.5s ease}
.xp-label{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-tertiary);margin-top:6px}
.milestones-row{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}
.milestone{display:flex;align-items:center;gap:6px;padding:6px 12px;background:rgba(255,255,255,0.02);border:1px solid var(--border);border-radius:20px;font-size:12px;font-weight:500;color:var(--text-tertiary)}
.milestone.unlocked{border-color:rgba(251,191,36,0.3);background:var(--amber-bg);color:var(--amber)}
.milestone .ml-icon{font-size:14px}
.streak-bar{display:flex;gap:12px;margin-bottom:20px;align-items:stretch}
.streak-card{flex:1;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;display:flex;align-items:center;gap:14px;backdrop-filter:blur(8px)}
.streak-card .streak-icon{font-size:28px;flex-shrink:0}
.streak-card .streak-val{font-family:'JetBrains Mono',monospace;font-size:24px;font-weight:700;line-height:1}
.streak-card .streak-lbl{font-size:11px;font-weight:600;color:var(--text-tertiary);letter-spacing:0.04em;text-transform:uppercase;margin-top:3px}
.streak-card.active{border-color:rgba(251,191,36,0.25);background:rgba(251,191,36,0.04)}
.streak-card.active .streak-val{color:var(--amber)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:20px}
.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-align:center;backdrop-filter:blur(8px)}
.stat-card .stat-val{font-family:'JetBrains Mono',monospace;font-size:26px;font-weight:700}
.stat-card .stat-val.green{color:var(--success)}.stat-card .stat-val.blue{color:var(--blue)}.stat-card .stat-val.amber{color:var(--amber)}.stat-card .stat-val.dark{color:var(--text-primary)}
.stat-card .stat-lbl{font-size:11px;font-weight:600;color:var(--text-tertiary);letter-spacing:0.04em;margin-top:4px;text-transform:uppercase}
.dash-two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:20px}
.dash-two-col>.chart-card,.dash-two-col>.calendar-card{margin-bottom:0}
.chart-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;backdrop-filter:blur(8px)}
.chart-card h3{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--text-secondary)}
.chart-card canvas{max-height:220px}
.calendar-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;backdrop-filter:blur(8px)}
.calendar-card h3{font-size:14px;font-weight:600;margin-bottom:4px;color:var(--text-secondary)}
.calendar-card .cal-subtitle{font-size:12px;color:var(--text-tertiary);margin-bottom:16px}
.cal-grid{display:flex;gap:3px;overflow-x:auto;scrollbar-width:none;padding-bottom:4px}
.cal-grid::-webkit-scrollbar{display:none}
.cal-week{display:flex;flex-direction:column;gap:3px}
.cal-day{width:14px;height:14px;border-radius:3px;background:rgba(255,255,255,0.04);transition:all var(--transition);position:relative;cursor:default}
.cal-day.lvl-1{background:rgba(110,231,160,0.15)}.cal-day.lvl-2{background:rgba(110,231,160,0.3)}.cal-day.lvl-3{background:rgba(110,231,160,0.5)}.cal-day.lvl-4{background:rgba(110,231,160,0.75)}
.cal-day.today{outline:2px solid var(--accent);outline-offset:1px}
.cal-day[data-tip]:hover::after{content:attr(data-tip);position:absolute;bottom:calc(100% + 6px);left:50%;transform:translateX(-50%);background:var(--bg-raised);border:1px solid var(--border);color:var(--text-primary);font-family:'JetBrains Mono',monospace;font-size:10px;padding:4px 8px;border-radius:6px;white-space:nowrap;z-index:50;pointer-events:none}
.cal-labels{display:flex;flex-direction:column;gap:3px;margin-right:6px;justify-content:space-between;padding:0 2px}
.cal-labels span{font-family:'JetBrains Mono',monospace;font-size:9px;color:var(--text-tertiary);height:14px;display:flex;align-items:center}
.cal-legend{display:flex;align-items:center;gap:4px;margin-top:10px;justify-content:flex-end}
.cal-legend span{font-size:10px;color:var(--text-tertiary)}
.section-title{font-size:14px;font-weight:600;margin:24px 0 12px;color:var(--text-secondary)}
.session-list{display:flex;flex-direction:column;gap:6px;margin-bottom:32px}
.session-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;transition:all var(--transition)}
.session-item:hover{background:var(--bg-card-hover)}
.session-module{font-weight:600;font-size:14px}
.session-meta{font-size:12px;color:var(--text-tertiary);font-family:'JetBrains Mono',monospace}
.session-score{font-family:'JetBrains Mono',monospace;font-weight:700;font-size:14px;color:var(--success)}
.empty-state{text-align:center;padding:48px 24px;color:var(--text-tertiary);font-size:14px}

/* ─── MODULE GRID ─── */
.module-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:10px}
.module-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;cursor:pointer;transition:all var(--transition);position:relative;text-decoration:none;color:var(--text-primary);display:block;backdrop-filter:blur(8px)}
.module-card:hover{background:var(--bg-card-hover);border-color:var(--border-strong);transform:translateY(-1px);box-shadow:0 8px 32px rgba(0,0,0,0.3)}
.module-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.module-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px}
.module-icon.math{background:var(--blue-bg)}.module-icon.memory{background:var(--success-bg)}.module-icon.nav{background:var(--amber-bg)}.module-icon.perf{background:var(--purple-bg)}.module-icon.radio{background:var(--error-bg)}.module-icon.theory{background:rgba(255,160,50,0.1)}.module-icon.biz{background:rgba(110,231,160,0.08)}
.module-tag{font-family:'JetBrains Mono',monospace;font-size:10px;font-weight:600;color:var(--text-tertiary);letter-spacing:0.06em;text-transform:uppercase}
.module-card h3{font-size:15px;font-weight:600;margin-bottom:5px;letter-spacing:-0.01em}
.module-card p{font-size:13px;color:var(--text-secondary);line-height:1.5}
.module-arrow{position:absolute;top:24px;right:24px;color:var(--text-tertiary);transition:all var(--transition);opacity:0}
.module-card:hover .module-arrow{opacity:1;transform:translateX(2px)}

/* ─── EXERCISE COMMON ─── */
.back-link{font-size:13px;color:var(--text-tertiary);cursor:pointer;transition:color var(--transition);display:inline-flex;align-items:center;gap:4px;margin-bottom:12px;text-decoration:none}
.back-link:hover{color:var(--accent)}
.exercise-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:12px}
.exercise-header h2{font-size:22px;font-weight:700;letter-spacing:-0.02em}
.diff-selector{display:flex;gap:2px;background:rgba(255,255,255,0.04);border:1px solid var(--border);border-radius:var(--radius-sm);padding:3px}
.diff-btn{font-family:inherit;font-size:12px;font-weight:500;padding:6px 14px;border:none;background:none;color:var(--text-tertiary);cursor:pointer;border-radius:7px;transition:all var(--transition)}
.diff-btn.active{color:var(--text-primary);background:rgba(255,255,255,0.08);font-weight:600}
.exercise-box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:48px 32px;text-align:center;min-height:340px;display:flex;flex-direction:column;align-items:center;justify-content:center;backdrop-filter:blur(12px)}
.question-display{font-size:34px;font-weight:700;margin-bottom:24px;letter-spacing:-0.03em;line-height:1.3;min-height:60px;display:flex;align-items:center;justify-content:center}
.question-sub{font-size:13px;color:var(--text-tertiary);margin-bottom:20px;font-weight:500}
.answer-input{background:var(--bg-input);border:2px solid var(--border);border-radius:var(--radius-sm);padding:14px 20px;font-family:'JetBrains Mono',monospace;font-size:20px;font-weight:600;color:var(--text-primary);text-align:center;width:240px;outline:none;transition:all var(--transition)}
.answer-input::placeholder{color:var(--text-tertiary);font-weight:400}
.answer-input:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-dim)}
.answer-input.correct{border-color:var(--success);background:var(--success-bg);animation:pop 0.3s ease}
.answer-input.wrong{border-color:var(--error);background:var(--error-bg);animation:shake 0.35s ease}
@keyframes pop{0%,100%{transform:scale(1)}50%{transform:scale(1.03)}}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.btn{font-family:inherit;font-size:14px;font-weight:600;padding:12px 28px;border:none;background:var(--accent);color:#060810;cursor:pointer;border-radius:999px;transition:all var(--transition);margin-top:20px;letter-spacing:-0.01em}
.btn:hover{opacity:0.9;box-shadow:0 0 24px var(--accent-glow);transform:translateY(-1px)}
.score-panel{display:flex;gap:32px;justify-content:center;margin-top:28px;flex-wrap:wrap}
.score-item{text-align:center}
.score-value{font-family:'JetBrains Mono',monospace;font-size:28px;font-weight:700}
.score-value.green{color:var(--success)}.score-value.amber{color:var(--amber)}.score-value.red{color:var(--error)}.score-value.cyan{color:var(--blue)}
.score-label{font-size:11px;font-weight:600;color:var(--text-tertiary);letter-spacing:0.04em;margin-top:4px;text-transform:uppercase}
.feedback{font-family:'JetBrains Mono',monospace;font-size:13px;font-weight:500;margin-top:14px;min-height:22px}
.feedback.correct{color:var(--success)}.feedback.wrong{color:var(--error)}
.timer-bar-container{width:100%;max-width:360px;height:3px;background:rgba(255,255,255,0.06);border-radius:2px;margin:16px auto;overflow:hidden}
.timer-bar{height:100%;background:var(--accent);border-radius:2px;transition:width 0.1s linear,background-color 0.3s;width:100%}
.timer-bar.warning{background:var(--amber)}.timer-bar.danger{background:var(--error)}
.seq-display{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:20px 0}
.seq-item{width:52px;height:52px;background:rgba(255,255,255,0.04);border:1.5px solid var(--border);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-family:'JetBrains Mono',monospace;font-size:20px;font-weight:700;transition:all 0.3s ease}
.seq-item.highlight{border-color:var(--accent);background:var(--accent);color:#060810;transform:scale(1.08);box-shadow:0 0 20px var(--accent-glow)}
.instruments-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin:20px 0}
.instrument-gauge{width:96px;text-align:center;padding:16px 8px;background:rgba(255,255,255,0.03);border-radius:var(--radius-sm);border:1px solid var(--border)}
.instrument-gauge .gauge-label{font-family:'JetBrains Mono',monospace;font-size:10px;font-weight:600;color:var(--text-tertiary);letter-spacing:0.06em;margin-bottom:6px;text-transform:uppercase}
.instrument-gauge .gauge-value{font-family:'JetBrains Mono',monospace;font-size:20px;font-weight:700;color:var(--accent)}
.compass-container{position:relative;width:260px;height:260px;margin:12px auto}
.compass-container svg{width:100%;height:100%}
.choices-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:20px;max-width:360px;width:100%}
.choice-btn{font-family:'JetBrains Mono',monospace;font-size:15px;font-weight:600;padding:14px 16px;border:1.5px solid var(--border);background:var(--bg-card);color:var(--text-primary);cursor:pointer;border-radius:var(--radius-sm);transition:all var(--transition)}
.choice-btn:hover{border-color:var(--accent);background:var(--accent-dim)}
.choice-btn.correct-choice{border-color:var(--success);background:var(--success-bg);color:var(--success)}
.choice-btn.wrong-choice{border-color:var(--error);background:var(--error-bg);color:var(--error)}

/* ─── THEORY ─── */
.theory-hero{margin-bottom:28px}
.theory-hero h2{font-size:26px;font-weight:700;letter-spacing:-0.03em;margin-bottom:8px}
.theory-hero p{color:var(--text-secondary);font-size:14px;line-height:1.6}
.article-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:10px;overflow:hidden;transition:all var(--transition);backdrop-filter:blur(8px)}
.article-card:hover{border-color:var(--border-strong)}
.article-header{padding:22px;cursor:pointer;display:flex;align-items:center;gap:16px}
.article-icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.article-icon.brain{background:var(--purple-bg)}.article-icon.compass{background:var(--amber-bg)}.article-icon.calc{background:var(--blue-bg)}.article-icon.radio-th{background:var(--error-bg)}.article-icon.perf-th{background:var(--success-bg)}
.article-header-text{flex:1}
.article-header-text h3{font-size:15px;font-weight:600;margin-bottom:3px}
.article-header-text p{font-size:13px;color:var(--text-tertiary)}
.article-toggle{font-size:18px;color:var(--text-tertiary);transition:transform 0.3s;flex-shrink:0}
.article-card.open .article-toggle{transform:rotate(180deg)}
.article-body{max-height:0;overflow:hidden;transition:max-height 0.4s ease}
.article-card.open .article-body{max-height:5000px}
.article-content{padding:0 22px 24px;line-height:1.75;color:var(--text-secondary);font-size:14px}
.article-content h4{font-size:16px;font-weight:600;color:var(--text-primary);margin:24px 0 10px}
.article-content h4:first-child{margin-top:0}
.article-content strong{color:var(--text-primary);font-weight:600}
.article-content .key-concept{background:rgba(255,255,255,0.03);border-left:3px solid var(--accent);padding:14px 18px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:16px 0;font-size:14px;line-height:1.65}
.article-content .source{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-tertiary);margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}
.article-content .try-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;padding:8px 16px;background:var(--accent);color:#060810;border-radius:999px;font-size:13px;font-weight:600;cursor:pointer;text-decoration:none;transition:all var(--transition)}
.article-content .try-link:hover{opacity:0.9;box-shadow:0 0 16px var(--accent-glow)}

.hidden{display:none!important}

@media(max-width:700px){
  .topbar{padding:0 12px;gap:8px}
  .rank-badge span:not(.rank-icon){display:none}
  .main{padding:24px 16px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .module-grid{grid-template-columns:1fr}
  .exercise-box{padding:32px 20px}
  .question-display{font-size:26px}
  .auth-card{margin:16px;padding:32px 24px}
  .rank-card{flex-direction:column;text-align:center}
  .streak-bar{flex-direction:column}
  .dash-two-col{grid-template-columns:1fr}
  .cal-day{width:12px;height:12px}
}