*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --r:14px;--r-sm:8px;--r-lg:20px;--r-xl:24px;
  --nav-h:68px;--top-h:56px;--sidebar-w:220px;
  --trans:0.2s ease;--trans-slow:0.35s ease;
}

/* ═══════════════════════════════ DARK THEME ═══════════════════════════════ */
body.theme-dark{
  --bg:#080c16;--surface:#0e1525;--surface2:#141d33;--surface3:#1c2640;
  --border:rgba(99,120,190,0.14);--border-hover:rgba(99,120,190,0.28);
  --primary:#6366f1;--primary-l:#818cf8;--primary-dim:rgba(99,102,241,0.14);
  --accent:#22d3ee;--accent-dim:rgba(34,211,238,0.12);
  --green:#4ade80;--green-dim:rgba(74,222,128,0.12);
  --amber:#fbbf24;--amber-dim:rgba(251,191,36,0.12);
  --pink:#f472b6;--pink-dim:rgba(244,114,182,0.12);
  --text:#e8edf8;--text2:#7e95b8;--text3:#334466;
  --topbar-bg:rgba(8,12,22,0.85);--nav-bg:rgba(8,12,22,0.92);
  --shadow:0 2px 16px rgba(0,0,0,0.55);
  --shadow-lg:0 8px 48px rgba(0,0,0,0.7);
  --shadow-card:0 1px 4px rgba(0,0,0,0.45),0 4px 20px rgba(0,0,0,0.3);
}

/* ═══════════════════════════════ LIGHT THEME ══════════════════════════════ */
body.theme-light{
  --bg:#f8faff;--surface:#ffffff;--surface2:#f1f5fb;--surface3:#e6ecf8;
  --border:rgba(100,116,180,0.13);--border-hover:rgba(100,116,180,0.26);
  --primary:#4f46e5;--primary-l:#6366f1;--primary-dim:rgba(79,70,229,0.10);
  --accent:#0ea5e9;--accent-dim:rgba(14,165,233,0.10);
  --green:#16a34a;--green-dim:rgba(22,163,74,0.10);
  --amber:#d97706;--amber-dim:rgba(217,119,6,0.10);
  --pink:#db2777;--pink-dim:rgba(219,39,119,0.10);
  --text:#111827;--text2:#4b5563;--text3:#9ca3af;
  --topbar-bg:rgba(248,250,255,0.90);--nav-bg:rgba(248,250,255,0.96);
  --shadow:0 2px 12px rgba(79,70,229,0.07);
  --shadow-lg:0 8px 40px rgba(79,70,229,0.12);
  --shadow-card:0 1px 3px rgba(0,0,0,0.05),0 4px 16px rgba(79,70,229,0.07);
}

/* ═══════════════════════════════ RETRO THEME ══════════════════════════════ */
body.theme-retro{
  --bg:#f5efe0;--surface:#fdf8ed;--surface2:#f0e8d0;--surface3:#e6d9ba;
  --border:#c8b898;--border-hover:#a08060;
  --primary:#b45309;--primary-l:#d97706;--primary-dim:rgba(180,83,9,0.12);
  --accent:#92400e;--accent-dim:rgba(146,64,14,0.10);
  --green:#4d7c0f;--green-dim:rgba(77,124,15,0.12);
  --amber:#92400e;--amber-dim:rgba(146,64,14,0.12);
  --pink:#9d174d;--pink-dim:rgba(157,23,77,0.10);
  --text:#292318;--text2:#57463a;--text3:#8a7560;
  --topbar-bg:rgba(245,239,224,0.93);--nav-bg:rgba(253,248,237,0.97);
  --shadow:0 2px 12px rgba(80,60,30,0.12);
  --shadow-lg:0 8px 40px rgba(80,60,30,0.18);
  --shadow-card:0 1px 3px rgba(80,60,30,0.10),0 4px 16px rgba(80,60,30,0.07);
}

/* ═══════════════════════════════ BASE ═════════════════════════════════════ */
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Plus Jakarta Sans',system-ui,sans-serif;
  background:var(--bg);color:var(--text);
  min-height:100vh;overflow-x:hidden;
  line-height:1.5;font-size:15px;
}
body *{transition:background-color var(--trans),border-color var(--trans),color var(--trans),box-shadow var(--trans),opacity var(--trans)}
.hidden{display:none!important}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit}

/* ═══════════════════════════════ KEY OVERLAY ══════════════════════════════ */
.key-overlay{
  position:fixed;inset:0;display:flex;align-items:center;justify-content:center;
  z-index:9999;padding:16px;overflow-y:auto;
  background:var(--bg);
}
.key-bg-mesh{
  position:fixed;inset:0;pointer-events:none;
  background:
    radial-gradient(ellipse 600px 400px at 15% 25%,rgba(124,58,237,0.18) 0%,transparent 70%),
    radial-gradient(ellipse 500px 400px at 85% 70%,rgba(56,189,248,0.14) 0%,transparent 70%),
    radial-gradient(ellipse 400px 300px at 50% 50%,rgba(244,114,182,0.08) 0%,transparent 70%);
  animation:meshPulse 10s ease-in-out infinite alternate;
}
@keyframes meshPulse{from{opacity:.7}to{opacity:1}}
.key-card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-xl);
  padding:40px 32px 36px;
  width:100%;max-width:440px;
  box-shadow:var(--shadow-lg),0 0 60px rgba(124,58,237,0.12);
}
.key-logo{text-align:center;margin-bottom:32px}
.key-logo-icon{display:inline-flex;margin-bottom:14px}
.key-logo-icon svg{width:56px;height:56px;filter:drop-shadow(0 0 20px rgba(124,58,237,0.5))}
.key-brand{
  font-size:2rem;font-weight:800;letter-spacing:-0.5px;
  background:linear-gradient(135deg,var(--accent),var(--primary-l));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.key-subtitle{color:var(--text2);font-size:.82rem;margin-top:5px;font-weight:500}
.key-tabs{
  display:flex;background:var(--surface2);
  border-radius:var(--r-sm);padding:4px;margin-bottom:28px;gap:4px;
  border:1px solid var(--border);
}
.key-tab{
  flex:1;padding:10px 8px;border:none;background:transparent;
  color:var(--text2);border-radius:6px;
  font-size:.82rem;font-weight:600;transition:var(--trans);
}
.key-tab.active{background:linear-gradient(135deg,var(--primary),var(--primary-l));color:#fff;box-shadow:0 2px 8px rgba(124,58,237,0.35)}
.key-panel{display:none}
.key-panel.active{display:block;animation:fadeUp .2s ease}
.key-info{color:var(--text2);font-size:.85rem;margin-bottom:20px;line-height:1.7}
.key-input{
  width:100%;padding:13px 16px;
  background:var(--surface2);border:1px solid var(--border);
  border-radius:var(--r-sm);color:var(--text);
  font-family:monospace;font-size:.82rem;
  margin-bottom:14px;outline:none;transition:var(--trans);
}
.key-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-dim)}
.key-error{color:var(--pink);font-size:.8rem;margin-top:10px;text-align:center;font-weight:500}
.key-display-box{
  background:var(--surface2);border:1px solid var(--border);
  border-radius:var(--r-sm);padding:20px;margin-bottom:14px;text-align:center;
}
.key-display-label{color:var(--text2);font-size:.75rem;margin-bottom:8px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.key-display-value{display:block;font-size:.72rem;color:var(--accent);word-break:break-all;letter-spacing:.5px;padding:8px 0;font-family:monospace}
.btn-copy{
  margin-top:10px;padding:7px 18px;
  background:var(--primary-dim);color:var(--primary-l);
  border:1px solid rgba(124,58,237,0.25);border-radius:6px;
  font-size:.8rem;font-weight:600;transition:var(--trans);
}
.btn-copy:hover{background:var(--primary);color:#fff}
.key-warning{
  background:var(--amber-dim);border:1px solid rgba(251,191,36,0.3);
  color:var(--amber);border-radius:var(--r-sm);
  padding:12px 14px;font-size:.8rem;margin-bottom:18px;line-height:1.6;
  border-left:3px solid var(--amber);
}

/* ═══════════════════════════════ BUTTONS ══════════════════════════════════ */
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-l));
  color:#fff;border:none;border-radius:var(--r-sm);
  padding:13px 22px;font-size:.9rem;font-weight:700;
  box-shadow:0 4px 16px rgba(124,58,237,0.35);transition:var(--trans);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 24px rgba(124,58,237,0.5)}
.btn-primary:active{transform:translateY(0);box-shadow:0 2px 8px rgba(124,58,237,0.3)}
.btn-full{width:100%;margin-top:8px;display:block;text-align:center}
.btn-secondary{
  background:var(--surface2);color:var(--text);
  border:1px solid var(--border);border-radius:var(--r-sm);
  padding:10px 16px;font-size:.85rem;font-weight:500;transition:var(--trans);
}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary-l)}
.btn-danger{
  background:var(--pink-dim);color:var(--pink);
  border:1px solid rgba(244,114,182,0.25);border-radius:var(--r-sm);
  padding:10px 16px;font-size:.85rem;font-weight:500;
  width:100%;margin-top:8px;transition:var(--trans);
}
.btn-danger:hover{background:rgba(244,114,182,0.2)}
.btn-mini{
  padding:5px 12px;background:var(--surface2);
  border:1px solid var(--border);border-radius:6px;
  color:var(--text2);font-size:.75rem;font-weight:500;transition:var(--trans);
}
.btn-mini:hover{border-color:var(--primary);color:var(--primary-l)}
.btn-pill{
  background:linear-gradient(135deg,var(--primary),var(--primary-l));
  color:#fff;border:none;border-radius:20px;
  padding:7px 18px;font-size:.78rem;font-weight:700;transition:var(--trans);
}
.btn-pill:hover{transform:translateY(-1px);box-shadow:0 4px 14px rgba(124,58,237,0.4)}
.icon-btn{
  background:var(--surface2);border:1px solid var(--border);
  color:var(--text2);padding:8px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  transition:var(--trans);line-height:1;
}
.icon-btn:hover{background:var(--surface3);color:var(--text);border-color:var(--border-hover)}

/* ═══════════════════════════════ APP SHELL ════════════════════════════════ */
.app{display:flex;flex-direction:column;min-height:100vh}

/* ═══════════════════════════════ TOPBAR ═══════════════════════════════════ */
.topbar{
  position:fixed;top:0;left:0;right:0;height:var(--top-h);
  background:var(--topbar-bg);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;padding:0 16px;gap:10px;z-index:100;
}
.topbar-left{display:flex;align-items:center;gap:8px;min-width:120px}
.topbar-logo-wrap{display:inline-flex;filter:drop-shadow(0 0 10px rgba(124,58,237,0.6))}
.topbar-brand{
  font-weight:800;font-size:1.05rem;letter-spacing:-0.3px;
  background:linear-gradient(135deg,var(--accent),var(--primary-l));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.topbar-center{flex:1;text-align:center;overflow:hidden;padding:0 8px}
.ticker-wrap{
  display:inline-flex;align-items:center;gap:7px;
  background:var(--surface2);border:1px solid var(--border);
  border-radius:20px;padding:5px 14px;max-width:100%;
}
.ticker-dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--accent);flex-shrink:0;
}
.ticker-dot.live{background:var(--pink);animation:livePulse 1.4s ease-in-out infinite}
@keyframes livePulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(0.7)}}
.ticker-text{
  font-size:.72rem;color:var(--text2);font-weight:600;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.topbar-right{display:flex;gap:6px;min-width:80px;justify-content:flex-end}

/* ═══════════════════════════════ SIDEBAR (desktop) ════════════════════════ */
.sidebar{
  display:none;
  position:fixed;top:var(--top-h);left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--surface);
  border-right:1px solid var(--border);
  flex-direction:column;
  z-index:90;overflow:hidden;
}
.sidebar-nav{flex:1;padding:16px 12px;display:flex;flex-direction:column;gap:4px}
.sidebar-item{
  display:flex;align-items:center;gap:11px;
  padding:10px 12px;border-radius:var(--r-sm);
  border:none;background:transparent;
  color:var(--text2);font-size:.88rem;font-weight:600;
  width:100%;text-align:left;transition:var(--trans);position:relative;
}
.sidebar-item:hover{background:var(--surface2);color:var(--text)}
.sidebar-item.active{background:var(--primary-dim);color:var(--primary-l)}
.sidebar-item.active .sidebar-icon{color:var(--primary-l)}
.sidebar-icon{display:flex;align-items:center;justify-content:center;color:var(--text3);flex-shrink:0;transition:var(--trans)}
.sidebar-item:hover .sidebar-icon,.sidebar-item.active .sidebar-icon{color:var(--primary-l)}
.sidebar-add-btn{
  margin:8px 12px 16px;
  background:linear-gradient(135deg,var(--primary),var(--primary-l));
  color:#fff;border:none;border-radius:var(--r-sm);
  padding:11px;font-size:.85rem;font-weight:700;
  display:flex;align-items:center;justify-content:center;gap:8px;
  transition:var(--trans);box-shadow:0 4px 14px rgba(124,58,237,0.3);
}
.sidebar-add-btn:hover{box-shadow:0 6px 20px rgba(124,58,237,0.45);transform:translateY(-1px)}
.sidebar-footer{
  border-top:1px solid var(--border);
  padding:14px 12px;display:flex;flex-direction:column;gap:8px;
}
.sidebar-footer-actions{display:flex;gap:8px}
.sidebar-footer-btn{
  flex:1;display:flex;align-items:center;justify-content:center;gap:6px;
  padding:8px;background:var(--surface2);border:1px solid var(--border);
  border-radius:var(--r-sm);color:var(--text2);font-size:.78rem;font-weight:600;
  transition:var(--trans);
}
.sidebar-footer-btn:hover{border-color:var(--primary);color:var(--primary-l)}
.sidebar-theme-row{display:flex;background:var(--surface2);border-radius:var(--r-sm);padding:3px;gap:3px;border:1px solid var(--border)}
.sidebar-theme-btn{
  flex:1;padding:6px 4px;border:none;background:transparent;
  color:var(--text3);border-radius:5px;font-size:.72rem;font-weight:700;
  transition:var(--trans);
}
.sidebar-theme-btn.active{background:linear-gradient(135deg,var(--primary),var(--primary-l));color:#fff}
.sidebar-theme-btn:hover:not(.active){color:var(--text);background:var(--surface3)}

/* ═══════════════════════════════ BOTTOM NAV ════════════════════════════════ */
.bottom-nav{
  position:fixed;bottom:0;left:0;right:0;height:var(--nav-h);
  background:var(--nav-bg);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-top:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-around;
  padding:0 8px;padding-bottom:env(safe-area-inset-bottom);z-index:100;
}
.nav-item{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:transparent;border:none;color:var(--text3);
  padding:8px 4px;border-radius:var(--r-sm);gap:4px;flex:1;position:relative;
  transition:var(--trans);
}
.nav-item.active{color:var(--accent)}
.nav-item.active::before{
  content:'';position:absolute;top:2px;left:50%;transform:translateX(-50%);
  width:18px;height:2.5px;background:var(--accent);border-radius:99px;
}
.nav-item:not(.nav-fab):hover{color:var(--text)}
.nav-icon-svg{transition:var(--trans)}
.nav-item.active .nav-icon-svg{filter:drop-shadow(0 0 8px rgba(56,189,248,0.5))}
.nav-label{font-size:.62rem;font-weight:700;letter-spacing:.3px}
.nav-fab{
  background:linear-gradient(135deg,var(--primary),var(--primary-l));
  border-radius:50%;width:52px;height:52px;max-width:52px;
  flex:0 0 52px;padding:0;transform:translateY(-16px);
  box-shadow:0 4px 20px rgba(124,58,237,0.5);transition:.3s cubic-bezier(0.34,1.56,0.64,1);
}
.nav-fab:hover{transform:translateY(-20px);box-shadow:0 6px 26px rgba(124,58,237,0.65)}
.nav-fab:active{transform:translateY(-14px)}

/* ═══════════════════════════════ MAIN CONTENT ══════════════════════════════ */
.main-content{
  margin-top:var(--top-h);
  margin-bottom:var(--nav-h);
  padding:16px;
  min-height:calc(100vh - var(--top-h) - var(--nav-h));
}
.tab-section{display:none}
.tab-section.active{display:block;animation:fadeUp .25s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* ═══════════════════════════════ SECTION HEADERS ═══════════════════════════ */
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.section-title{font-size:1rem;font-weight:800;color:var(--text);letter-spacing:-0.2px}
.section-badge{font-size:.75rem;color:var(--accent);font-weight:600}

/* ═══════════════════════════════ HERO CARD ═════════════════════════════════ */
.hero-card{
  background:var(--surface);
  border:1px solid rgba(124,58,237,0.18);
  border-radius:var(--r-lg);
  padding:22px 22px 20px;
  margin-bottom:14px;min-height:138px;
  position:relative;overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:var(--trans);
}
.hero-card::before{
  content:'';position:absolute;top:-40px;right:-30px;
  width:180px;height:180px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,58,237,0.12),transparent 70%);
  pointer-events:none;
}
.hero-card::after{
  content:'';position:absolute;bottom:-30px;left:-20px;
  width:130px;height:130px;border-radius:50%;
  background:radial-gradient(circle,rgba(56,189,248,0.08),transparent 70%);
  pointer-events:none;
}
.hero-label{
  display:inline-flex;align-items:center;gap:6px;
  font-size:.68rem;font-weight:800;letter-spacing:.8px;text-transform:uppercase;
  margin-bottom:10px;padding:4px 10px;
  border-radius:20px;background:var(--surface2);border:1px solid var(--border);
  color:var(--text2);
}
.hero-label.now{color:var(--pink);border-color:var(--pink-dim);background:var(--pink-dim)}
.hero-label.next{color:var(--green);border-color:var(--green-dim);background:var(--green-dim)}
.hero-label.exam{color:var(--amber);border-color:var(--amber-dim);background:var(--amber-dim)}
.hero-course{font-size:1.3rem;font-weight:800;color:var(--text);margin-bottom:6px;line-height:1.25;letter-spacing:-0.3px}
.hero-meta{font-size:.8rem;color:var(--text2);margin-bottom:12px;font-weight:500}
.hero-countdown{font-size:2rem;font-weight:800;color:var(--accent);letter-spacing:-1px;line-height:1}
.progress-wrap{
  margin-top:14px;background:var(--surface2);
  border-radius:99px;height:6px;overflow:hidden;
  border:1px solid var(--border);
}
.progress-bar{
  height:100%;border-radius:99px;
  background:linear-gradient(90deg,var(--accent),var(--primary-l));
  transition:width 1s ease;
}
.no-event{text-align:center;padding:32px 0;color:var(--text2);font-size:.9rem;line-height:1.8}

/* ═══════════════════════════════ STATS ROW ═════════════════════════════════ */
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:22px}
.stat-chip{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r);padding:16px 10px;text-align:center;
  box-shadow:var(--shadow-card);transition:var(--trans);
}
.stat-chip:hover{border-color:rgba(124,58,237,0.3);transform:translateY(-2px);box-shadow:var(--shadow)}
.stat-num{
  display:block;font-size:1.7rem;font-weight:800;line-height:1;
  background:linear-gradient(135deg,var(--primary-l),var(--accent));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  margin-bottom:6px;
}
.stat-label{font-size:.62rem;color:var(--text3);font-weight:600;letter-spacing:.3px;text-transform:uppercase}

/* ═══════════════════════════════ TODAY SCHEDULE ════════════════════════════ */
.today-schedule{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
.today-class-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r);padding:14px 16px;
  display:flex;align-items:center;gap:14px;
  box-shadow:var(--shadow-card);transition:var(--trans);
}
.today-class-card:hover{border-color:var(--border-hover);transform:translateX(2px)}
.today-class-card.current-class{
  border-color:rgba(124,58,237,0.35);
  border-left:3px solid var(--primary);
  background:var(--primary-dim);
}
.today-class-card.past-class{opacity:.45}
.class-type-dot{width:11px;height:11px;border-radius:3px;flex-shrink:0}
.dot-theory{background:var(--accent)}
.dot-lab{background:var(--amber)}
.class-card-info{flex:1;min-width:0}
.class-card-name{font-size:.92rem;font-weight:700;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.class-card-meta{font-size:.75rem;color:var(--text2);margin-top:3px;font-weight:500}
.class-card-time{text-align:right;flex-shrink:0}
.class-card-time-start{font-size:.82rem;font-weight:800;color:var(--accent);display:block}
.class-card-time-end{font-size:.7rem;color:var(--text3);font-weight:500}

/* ═══════════════════════════════ EXAM BANNER ═══════════════════════════════ */
.next-exam-banner{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r);padding:18px 18px 16px;margin-bottom:20px;
  border-left:3px solid var(--pink);box-shadow:var(--shadow-card);
}
.exam-course{font-size:1rem;font-weight:800;color:var(--text);margin-bottom:4px}
.exam-meta{font-size:.78rem;color:var(--text2);margin-bottom:10px;font-weight:500}
.exam-countdown-big{
  font-size:1.25rem;font-weight:800;color:var(--pink);letter-spacing:-0.3px;
}

/* ═══════════════════════════════ SCHEDULE GRID ══════════════════════════════ */
.routine-grid{display:flex;flex-direction:column;gap:14px}
.day-block{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r);overflow:hidden;
  box-shadow:var(--shadow-card);
}
.day-block-header{
  background:var(--surface2);padding:12px 16px;
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;
}
.day-block-title{font-size:.88rem;font-weight:800;color:var(--text)}
.day-today-badge{
  font-size:.65rem;font-weight:700;padding:2px 8px;
  background:var(--primary-dim);color:var(--primary-l);
  border-radius:20px;letter-spacing:.3px;text-transform:uppercase;
  border:1px solid rgba(124,58,237,0.2);
}
.day-block-body{padding:12px;display:flex;flex-direction:column;gap:8px}
.class-row{
  background:var(--surface2);border:1px solid var(--border);
  border-radius:var(--r-sm);padding:13px 14px;
  display:flex;align-items:center;gap:12px;transition:var(--trans);
}
.class-row:hover{border-color:var(--border-hover);transform:translateX(3px)}
.class-row-info{flex:1;min-width:0}
.class-row-name{font-size:.88rem;font-weight:700;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.class-row-meta{font-size:.73rem;color:var(--text2);margin-top:3px;font-weight:500}
.class-row-actions{display:flex;gap:5px;flex-shrink:0}
.gap-row{
  display:flex;align-items:center;gap:10px;
  padding:4px 2px;color:var(--text3);font-size:.7rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.5px;
}
.gap-row::before,.gap-row::after{
  content:'';flex:1;height:1px;
  background:var(--border);
  border-radius:99px;
}
.gap-row span{
  display:inline-flex;align-items:center;gap:5px;
  padding:3px 10px;
  background:var(--surface3);
  border:1px solid var(--border);
  border-radius:20px;
  color:var(--text3);
  white-space:nowrap;
  flex-shrink:0;
}
.btn-edit,.btn-del{
  border:none;border-radius:6px;padding:6px 10px;
  font-size:.72rem;font-weight:700;transition:var(--trans);
}
.btn-edit{background:var(--amber-dim);color:var(--amber)}
.btn-edit:hover{background:rgba(251,191,36,0.25)}
.btn-del{background:var(--pink-dim);color:var(--pink)}
.btn-del:hover{background:rgba(244,114,182,0.25)}

/* ═══════════════════════════════ EXAM LIST ══════════════════════════════════ */
.exam-list{display:flex;flex-direction:column;gap:10px}
.exam-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r);padding:18px;
  box-shadow:var(--shadow-card);transition:var(--trans);
}
.exam-card:hover{border-color:var(--border-hover)}
.exam-card.expired{opacity:.4}
.exam-card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:8px}
.exam-card-course{font-size:1rem;font-weight:800;color:var(--text)}
.exam-card-actions{display:flex;gap:5px}
.exam-card-meta{font-size:.8rem;color:var(--text2);margin-bottom:10px;font-weight:500}
.exam-card-countdown{
  font-size:.82rem;font-weight:700;color:var(--pink);
  display:inline-flex;align-items:center;gap:5px;
  padding:4px 12px;background:var(--pink-dim);
  border-radius:20px;border:1px solid rgba(244,114,182,0.2);
}
.exam-card-notes{
  font-size:.76rem;color:var(--text3);margin-top:10px;
  font-style:italic;line-height:1.5;
}

/* ═══════════════════════════════ SEARCH TAB ════════════════════════════════ */
.search-box{
  display:flex;align-items:center;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r);padding:13px 16px;gap:12px;margin-bottom:14px;
  box-shadow:var(--shadow-card);transition:var(--trans);
}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-dim)}
.search-icon-svg{color:var(--text3);flex-shrink:0}
.search-box input{
  flex:1;background:transparent;border:none;outline:none;
  color:var(--text);font-size:.9rem;font-weight:500;
}
.search-box input::placeholder{color:var(--text3)}
.search-clear{
  background:transparent;border:none;color:var(--text3);
  font-size:1.1rem;padding:2px;display:flex;
  transition:var(--trans);border-radius:4px;
}
.search-clear:hover{color:var(--text);background:var(--surface2)}
.search-results{
  display:flex;flex-direction:column;gap:8px;
  max-height:420px;overflow-y:auto;margin-bottom:14px;
}
.search-result-item{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r);padding:16px;
  box-shadow:var(--shadow-card);transition:var(--trans);
}
.search-result-item:hover{border-color:var(--primary);transform:translateX(2px)}
.search-result-title{font-size:.92rem;font-weight:800;color:var(--accent);margin-bottom:5px}
.search-result-meta{font-size:.78rem;color:var(--text2);font-weight:500}
.search-result-schedules{font-size:.73rem;color:var(--text3);margin-top:5px;line-height:1.5}
.btn-add-course{
  margin-top:12px;padding:8px 16px;
  background:linear-gradient(135deg,var(--primary),var(--primary-l));
  color:#fff;border:none;border-radius:6px;
  font-size:.8rem;font-weight:700;transition:var(--trans);
  box-shadow:0 2px 8px rgba(124,58,237,0.3);
}
.btn-add-course:hover{box-shadow:0 4px 14px rgba(124,58,237,0.45);transform:translateY(-1px)}
.divider-or{
  display:flex;align-items:center;gap:14px;margin:22px 0;
  color:var(--text3);font-size:.75rem;font-weight:700;
  text-transform:uppercase;letter-spacing:1px;
}
.divider-or::before,.divider-or::after{content:'';flex:1;height:1px;background:var(--border)}

/* ═══════════════════════════════ FORMS ══════════════════════════════════════ */
.form-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r-lg);padding:22px;
  box-shadow:var(--shadow-card);
}
.form-card-title{
  font-size:1rem;font-weight:800;margin-bottom:20px;
  color:var(--text);display:flex;align-items:center;gap:8px;letter-spacing:-0.2px;
}
.form-card-title svg{color:var(--primary-l)}
.form-group{margin-bottom:14px}
.form-group label{
  display:block;font-size:.78rem;color:var(--text2);
  font-weight:700;margin-bottom:7px;letter-spacing:.2px;
}
.form-group input,.form-group select{
  width:100%;padding:11px 14px;
  background:var(--surface2);border:1px solid var(--border);
  border-radius:var(--r-sm);color:var(--text);font-size:.88rem;
  outline:none;transition:var(--trans);font-weight:500;
}
.form-group input:focus,.form-group select:focus{
  border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-dim);
}
.form-group select{
  appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' viewBox='0 0 24 24' stroke='%238b9ab5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;
  padding-right:36px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.day-pills{display:flex;flex-wrap:wrap;gap:7px}
.day-pill{
  padding:8px 14px;border:1px solid var(--border);
  background:var(--surface2);color:var(--text2);border-radius:20px;
  font-size:.8rem;font-weight:700;transition:var(--trans);
}
.day-pill:hover{border-color:var(--primary-l);color:var(--primary-l)}
.day-pill.active{
  background:linear-gradient(135deg,var(--primary),var(--primary-l));
  color:#fff;border-color:transparent;
  box-shadow:0 2px 8px rgba(124,58,237,0.35);
}

/* ═══════════════════════════════ BOTTOM SHEET ══════════════════════════════ */
.sheet-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.55);backdrop-filter:blur(4px);z-index:200}
.bottom-sheet{
  position:fixed;bottom:0;left:0;right:0;
  background:var(--surface);border-radius:24px 24px 0 0;
  border-top:1px solid var(--border);
  padding:14px 20px 36px;z-index:201;
  animation:slideUp .3s cubic-bezier(0.16,1,0.3,1);
}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:translateY(0)}}
.sheet-handle{
  width:44px;height:4px;background:var(--text3);
  border-radius:99px;margin:0 auto 20px;opacity:.4;
}
.sheet-title{font-size:1.05rem;font-weight:800;margin-bottom:16px;color:var(--text);letter-spacing:-0.2px}
.sheet-option{
  display:flex;align-items:center;gap:14px;width:100%;
  background:var(--surface2);border:1px solid var(--border);
  border-radius:var(--r);padding:15px;margin-bottom:10px;
  transition:var(--trans);
}
.sheet-option:hover{border-color:var(--primary);background:var(--primary-dim);transform:translateX(4px)}
.sheet-opt-icon{
  display:flex;align-items:center;justify-content:center;
  width:42px;height:42px;background:var(--surface3);
  border-radius:11px;color:var(--primary-l);flex-shrink:0;
  border:1px solid var(--border);
}
.sheet-opt-title{font-size:.9rem;font-weight:700;color:var(--text);text-align:left;margin-bottom:2px}
.sheet-opt-sub{font-size:.75rem;color:var(--text2);text-align:left}

/* ═══════════════════════════════ MODALS ══════════════════════════════════════ */
.modal-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,0.55);
  backdrop-filter:blur(5px);z-index:300;
  display:flex;align-items:flex-end;justify-content:center;padding:0;
  animation:fadeIn .2s ease;
}
@media(min-width:600px){.modal-overlay{align-items:center;padding:20px}}
.modal-card{
  width:100%;max-width:500px;max-height:92vh;overflow-y:auto;
  border-radius:24px 24px 0 0;padding:24px 22px 36px;
  background:var(--surface);border:1px solid var(--border);
  box-shadow:var(--shadow-lg);
  animation:slideUp .3s cubic-bezier(0.16,1,0.3,1);
}
@media(min-width:600px){
  .modal-card{border-radius:var(--r-xl);animation:scaleUp .3s cubic-bezier(0.16,1,0.3,1)}
}
@keyframes scaleUp{from{opacity:0;transform:scale(0.96)}to{opacity:1;transform:scale(1)}}
.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.modal-header h2{font-size:1.15rem;font-weight:800;letter-spacing:-0.3px}
.modal-close{
  background:var(--surface2);border:1px solid var(--border);
  color:var(--text2);border-radius:50%;width:32px;height:32px;
  display:flex;align-items:center;justify-content:center;transition:var(--trans);
}
.modal-close:hover{background:var(--surface3);color:var(--text);border-color:var(--border-hover)}
.modal-body{display:flex;flex-direction:column;gap:0}

/* Settings */
.setting-group{margin-bottom:22px}
.setting-label{display:block;font-size:.82rem;color:var(--text2);margin-bottom:10px;font-weight:700;letter-spacing:.2px}
.setting-select{
  width:100%;padding:11px 14px;background:var(--surface2);
  border:1px solid var(--border);border-radius:var(--r-sm);
  color:var(--text);font-family:inherit;font-size:.88rem;outline:none;
  appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' viewBox='0 0 24 24' stroke='%238b9ab5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;
  transition:var(--trans);
}
.setting-select:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-dim);outline:none}
.key-row{display:flex;align-items:center;gap:10px}
.mini-key{
  font-size:.72rem;color:var(--accent);word-break:break-all;flex:1;
  background:var(--surface2);padding:10px 14px;
  border-radius:var(--r-sm);border:1px solid var(--border);
  font-family:monospace;letter-spacing:.3px;
}
.theme-switcher{display:flex;background:var(--surface2);border-radius:var(--r-sm);padding:3px;gap:3px;border:1px solid var(--border)}
.theme-btn{
  flex:1;padding:8px 6px;border:none;background:transparent;
  color:var(--text2);border-radius:5px;font-size:.82rem;font-weight:700;
  transition:var(--trans);
}
.theme-btn.active{background:linear-gradient(135deg,var(--primary),var(--primary-l));color:#fff}
.theme-btn:hover:not(.active){color:var(--text);background:var(--surface3)}
.danger-zone{margin-top:24px;padding-top:22px;border-top:1px dashed var(--border)}
.danger-label{font-size:.75rem;color:var(--pink);font-weight:800;text-transform:uppercase;margin-bottom:12px;letter-spacing:1px}

/* Help */
.help-item{display:flex;gap:14px;margin-bottom:18px;align-items:flex-start}
.help-icon{font-size:1.35rem;flex-shrink:0;line-height:1.4}
.help-item div{font-size:.87rem;color:var(--text2);line-height:1.65}
.help-item strong{color:var(--text)}

/* ═══════════════════════════════ SNACKBAR & TOAST ══════════════════════════ */
.snackbar{
  position:fixed;bottom:calc(var(--nav-h) + 16px);left:50%;
  transform:translateX(-50%);
  background:var(--text);color:var(--bg);
  border-radius:var(--r-lg);padding:12px 16px 12px 20px;
  display:flex;align-items:center;gap:16px;z-index:500;
  box-shadow:var(--shadow-lg);white-space:nowrap;font-weight:600;
  animation:toastIn .3s cubic-bezier(0.16,1,0.3,1);
}
.snackbar span{font-size:.85rem}
.btn-snackbar-undo{
  background:var(--bg);color:var(--accent);border:none;
  border-radius:12px;padding:5px 14px;font-size:.8rem;font-weight:800;
}
.toast{
  position:fixed;top:calc(var(--top-h) + 14px);left:50%;
  transform:translateX(-50%);
  background:var(--surface2);border:1px solid var(--border);
  color:var(--text);padding:10px 20px;border-radius:100px;
  font-size:.82rem;font-weight:700;z-index:1000;
  box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:8px;
  animation:toastIn .3s cubic-bezier(0.16,1,0.3,1);
  white-space:nowrap;
}
@keyframes toastIn{from{opacity:0;transform:translate(-50%,-8px)}to{opacity:1;transform:translate(-50%,0)}}

/* ═══════════════════════════════ LOADER ══════════════════════════════════════ */
.global-loader{
  position:fixed;inset:0;background:rgba(7,9,15,0.75);
  backdrop-filter:blur(8px);z-index:9998;
  display:flex;align-items:center;justify-content:center;
}
.loader-ring{
  width:44px;height:44px;
  border:3.5px solid rgba(124,58,237,0.2);
  border-top-color:var(--primary-l);
  border-radius:50%;animation:spin .75s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ═══════════════════════════════ EMPTY STATES ══════════════════════════════ */
.empty-state{color:var(--text3);font-size:.88rem;text-align:center;padding:22px 0;line-height:1.9;font-weight:500}
.full-empty{padding:56px 20px}

/* ═══════════════════════════════ RESPONSIVE ════════════════════════════════ */
@media(min-width:768px){
  .main-content{
    margin-left:var(--sidebar-w);
    margin-bottom:0;
    max-width:none;
    padding:28px 32px;
  }
  .bottom-nav{display:none}
  .sidebar{display:flex}
  .snackbar{bottom:20px}

  /* Home tab: proper two-column layout */
  #tab-home{
    display:grid;
    grid-template-columns:1fr 300px;
    gap:0 24px;
    align-items:start;
  }
  .home-main{grid-column:1}
  .home-side{grid-column:2;position:sticky;top:calc(var(--top-h) + 28px)}
  .home-side .section-header{margin-top:0}

  .routine-grid{display:grid;grid-template-columns:repeat(2,1fr)}
  .modal-overlay{align-items:center;padding:20px}
}

@media(min-width:1100px){
  .main-content{padding:32px 40px}
  .routine-grid{grid-template-columns:repeat(3,1fr)}
  #tab-home{grid-template-columns:1fr 320px}
}

/* Glass style overrides — dark theme */
body.theme-dark .hero-card,
body.theme-dark .stat-chip,
body.theme-dark .today-class-card,
body.theme-dark .next-exam-banner,
body.theme-dark .day-block,
body.theme-dark .exam-card,
body.theme-dark .search-result-item,
body.theme-dark .form-card,
body.theme-dark .search-box{
  background:rgba(15,20,32,0.6);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
body.theme-dark .class-row{
  background:rgba(22,30,48,0.7);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
body.theme-dark .sidebar{
  background:rgba(7,9,15,0.75);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
}
/* Remove heavy decorations in glass mode */
.hero-card::before,.hero-card::after{display:none}

/* Retro-specific topbar tint */
body.theme-retro .topbar{background:rgba(253,246,227,0.93)}
body.theme-retro .bottom-nav{background:rgba(251,241,199,0.97)}
body.theme-retro .sidebar{background:var(--surface)}
body.theme-retro .topbar-logo-wrap{filter:drop-shadow(0 0 8px rgba(192,86,33,0.5))}
body.theme-retro .topbar-brand{background:linear-gradient(135deg,var(--accent),var(--primary-l));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* Light-specific overrides */
body.theme-light .topbar-logo-wrap{filter:drop-shadow(0 0 8px rgba(109,40,217,0.45))}
body.theme-light .nav-fab{box-shadow:0 4px 16px rgba(109,40,217,0.45)}
body.theme-light .hero-card::before{background:radial-gradient(circle,rgba(109,40,217,0.08),transparent 70%)}

/* Scrollbar styling */
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px}
::-webkit-scrollbar-thumb:hover{background:var(--text3)}