/* ══════════════════════════════════════
   PREMIUM DESIGN SYSTEM — INHA Portal
   ══════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{font-family:'Inter',system-ui,sans-serif;-webkit-font-smoothing:antialiased;}

:root {
  --primary:#6366F1; --primary-dark:#4F46E5; --primary-deeper:#3730A3;
  --violet:#8B5CF6;
  --grad: linear-gradient(135deg,#4F46E5 0%,#7C3AED 100%);
  --grad-subtle: linear-gradient(135deg,rgba(99,102,241,.08),rgba(124,58,237,.08));
  /* Light mode */
  --bg:#F0F2FF; --surface:#FFFFFF; --surface-2:#F7F8FF; --surface-3:#EEF0FF;
  --border:rgba(99,102,241,.12); --border-2:#E5E7EB;
  --text-1:#1E1B4B; --text-2:#4B5563; --text-3:#9CA3AF;
  --shadow-xs:0 1px 3px rgba(79,70,229,.06);
  --shadow-sm:0 2px 8px rgba(79,70,229,.08),0 0 0 1px rgba(99,102,241,.06);
  --shadow-md:0 4px 20px rgba(79,70,229,.1),0 0 0 1px rgba(99,102,241,.06);
  --shadow-lg:0 12px 40px rgba(79,70,229,.12),0 0 0 1px rgba(99,102,241,.08);
  --shadow-xl:0 24px 56px rgba(79,70,229,.16),0 0 0 1px rgba(99,102,241,.1);
  /* Sidebar — light mode */
  --sb-bg:#FFFFFF; --sb-border:rgba(99,102,241,.1);
  --sb-text:#64748B; --sb-text-active:#1E1B4B;
  --sb-section:#9CA3AF;
  --sb-hover:rgba(99,102,241,.06); --sb-hover-text:#4F46E5;
  --sb-user-bg:rgba(99,102,241,.05); --sb-user-border:rgba(99,102,241,.1);
  --sb-uname:#1E1B4B; --sb-uid:#9CA3AF;
  --sb-logout:rgba(99,102,241,.06); --sb-logout-clr:#64748B;
  --nav-h:68px; --sidebar-w:260px; --radius:14px; --radius-lg:20px;
}

/* ── DARK MODE ── */
[data-theme="dark"] {
  --bg:#07091A; --surface:#0F1022; --surface-2:#131428; --surface-3:#161730;
  --border:rgba(255,255,255,.07); --border-2:rgba(255,255,255,.1);
  --text-1:#F1F3FF; --text-2:#9CA3AF; --text-3:#4B5563;
  --shadow-sm:0 2px 8px rgba(0,0,0,.4); --shadow-md:0 4px 20px rgba(0,0,0,.5);
  --shadow-lg:0 12px 40px rgba(0,0,0,.6); --shadow-xl:0 24px 56px rgba(0,0,0,.7);
  /* Sidebar — dark mode */
  --sb-bg:#0F0D23; --sb-border:rgba(255,255,255,.07);
  --sb-text:rgba(255,255,255,.55); --sb-text-active:#F3F4F6;
  --sb-section:rgba(255,255,255,.2);
  --sb-hover:rgba(255,255,255,.07); --sb-hover-text:rgba(255,255,255,.8);
  --sb-user-bg:rgba(255,255,255,.05); --sb-user-border:rgba(255,255,255,.08);
  --sb-uname:rgba(255,255,255,.85); --sb-uid:rgba(255,255,255,.3);
  --sb-logout:rgba(255,255,255,.04); --sb-logout-clr:rgba(255,255,255,.3);
}

body{background:var(--bg);color:var(--text-1);min-height:100vh;display:flex;flex-direction:column;
  transition:background .3s,color .3s;}

/* ── SCROLLBAR ── */
::-webkit-scrollbar{width:6px;height:6px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:rgba(99,102,241,.25);border-radius:99px;}
::-webkit-scrollbar-thumb:hover{background:rgba(99,102,241,.45);}

/* ══ NAVBAR ══ */
.navbar{
  position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:100;
  background:rgba(240,242,255,.82);backdrop-filter:blur(20px) saturate(200%);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;padding:0 28px;
  transition:background .3s;
}
[data-theme="dark"] .navbar{background:rgba(7,9,26,.85);}

.nav-logo{display:flex;align-items:center;gap:12px;text-decoration:none;}
.nav-logo-icon{
  width:38px;height:38px;border-radius:10px;flex-shrink:0;
  background:var(--grad);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(79,70,229,.4);
}
.nav-logo span{font-size:16px;font-weight:800;color:var(--text-1);letter-spacing:-.03em;}
.nav-right{display:flex;align-items:center;gap:10px;}

.icon-btn{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--border);
  background:var(--surface);display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:all .2s;color:var(--text-2);font-size:17px;
}
.icon-btn:hover{background:var(--surface-3);border-color:rgba(99,102,241,.3);color:var(--primary);}

.notif-wrap{position:relative;}
.notif-dot{position:absolute;top:7px;right:7px;width:7px;height:7px;
  background:#EF4444;border-radius:50%;border:2px solid var(--surface);}

.nav-user{font-size:13px;font-weight:600;color:var(--text-2);}
.avatar{
  width:38px;height:38px;border-radius:10px;flex-shrink:0;
  background:var(--grad);
  display:flex;align-items:center;justify-content:center;color:#fff;
  font-weight:800;font-size:13px;letter-spacing:.02em;cursor:pointer;
  box-shadow:0 4px 12px rgba(79,70,229,.3);
}

/* ══ SIDEBAR ══ */
.sidebar{
  position:fixed;top:var(--nav-h);left:0;bottom:0;width:var(--sidebar-w);
  background:var(--sb-bg);border-right:1px solid var(--sb-border);
  padding:20px 14px;display:flex;flex-direction:column;gap:2px;
  overflow-y:auto;transition:background .3s,border-color .3s,transform .3s cubic-bezier(.4,0,.2,1),box-shadow .3s;
  box-shadow:2px 0 12px rgba(99,102,241,.06);
}
.sidebar-section{font-size:10px;font-weight:700;color:var(--sb-section);
  letter-spacing:.1em;text-transform:uppercase;padding:14px 12px 6px;}
.nav-item{
  display:flex;align-items:center;gap:11px;padding:10px 13px;
  border-radius:10px;text-decoration:none;color:var(--sb-text);
  font-size:13.5px;font-weight:500;transition:all .18s;
}
.nav-item:hover{background:var(--sb-hover);color:var(--sb-hover-text);}
.nav-item.active{
  background:linear-gradient(135deg,rgba(99,102,241,.15),rgba(124,58,237,.1));
  color:var(--primary-dark);font-weight:700;
  border:1px solid rgba(99,102,241,.25);
  box-shadow:0 2px 8px rgba(79,70,229,.1);
}
[data-theme="dark"] .nav-item.active{
  background:linear-gradient(135deg,rgba(99,102,241,.3),rgba(124,58,237,.2));
  color:#E0E7FF;border-color:rgba(99,102,241,.3);
  box-shadow:0 2px 8px rgba(79,70,229,.2);
}
.nav-item .icon{font-size:16px;width:20px;text-align:center;flex-shrink:0;}
.nav-badge{margin-left:auto;background:rgba(99,102,241,.15);color:var(--primary-dark);
  font-size:10px;font-weight:800;border-radius:99px;padding:2px 7px;letter-spacing:.02em;}
[data-theme="dark"] .nav-badge{background:rgba(99,102,241,.35);color:#C7D2FE;}
.nav-divider{height:1px;background:var(--sb-border);margin:8px 0;}
.sidebar-bottom{margin-top:auto;}
.logout-btn{display:flex;align-items:center;gap:11px;padding:10px 13px;
  border-radius:10px;text-decoration:none;color:var(--sb-logout-clr);font-size:13.5px;
  cursor:pointer;transition:all .18s;border:none;background:none;width:100%;font-family:'Inter',sans-serif;}
.logout-btn:hover{background:rgba(239,68,68,.1);color:#EF4444;}

/* User card in sidebar */
.sidebar-user{
  background:var(--sb-user-bg);border:1px solid var(--sb-user-border);
  border-radius:12px;padding:12px 14px;display:flex;align-items:center;gap:10px;margin-bottom:12px;
  transition:background .3s,border-color .3s;
}
.sidebar-user .uname{font-size:13px;font-weight:700;color:var(--sb-uname);}
.sidebar-user .uid{font-size:11px;color:var(--sb-uid);margin-top:1px;}
.sidebar-user .av{width:34px;height:34px;border-radius:8px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px;font-weight:800;flex-shrink:0;}

/* ══ MAIN ══ */
.main{margin-top:var(--nav-h);margin-left:var(--sidebar-w);padding:32px 36px;flex:1;}

/* ══ PAGE HEADER ══ */
.page-header{margin-bottom:28px;}
.page-header h1{font-size:24px;font-weight:800;color:var(--text-1);letter-spacing:-.04em;}
.page-header .subtitle{font-size:14px;color:var(--text-3);margin-top:5px;font-weight:400;}

/* ══ CARDS ══ */
.card{
  background:var(--surface);border-radius:var(--radius-lg);
  border:1px solid var(--border);box-shadow:var(--shadow-sm);
  transition:box-shadow .25s,border-color .25s;
}
.card:hover{box-shadow:var(--shadow-md);}
.card-inner{padding:24px 26px;}
.card-title{font-size:14px;font-weight:700;color:var(--text-1);letter-spacing:-.01em;
  display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.card-link{font-size:12.5px;color:var(--primary);text-decoration:none;font-weight:600;}
.card-link:hover{text-decoration:underline;color:var(--primary-dark);}

/* ══ STAT CARDS ══ */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px;}
.stat-card{
  background:var(--surface);border-radius:var(--radius-lg);border:1px solid var(--border);
  padding:22px 24px;box-shadow:var(--shadow-sm);display:flex;align-items:center;gap:18px;
  transition:all .25s;cursor:default;
}
.stat-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px);}
.stat-icon{
  width:52px;height:52px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;font-size:24px;flex-shrink:0;
}
.stat-icon.indigo{background:linear-gradient(135deg,rgba(99,102,241,.15),rgba(79,70,229,.2));}
.stat-icon.violet{background:linear-gradient(135deg,rgba(139,92,246,.15),rgba(124,58,237,.2));}
.stat-icon.emerald{background:linear-gradient(135deg,rgba(16,185,129,.15),rgba(5,150,105,.2));}
.stat-icon.amber{background:linear-gradient(135deg,rgba(245,158,11,.15),rgba(217,119,6,.2));}
.stat-label{font-size:12px;color:var(--text-3);font-weight:500;letter-spacing:.01em;margin-bottom:4px;}
.stat-value{font-size:26px;font-weight:800;color:var(--text-1);letter-spacing:-.04em;line-height:1;}
.stat-sub{font-size:11.5px;color:var(--text-3);margin-top:3px;}

/* ══ WELCOME BANNER ══ */
.welcome-banner{
  background:linear-gradient(130deg,#3730A3 0%,#4F46E5 40%,#6D28D9 75%,#7C3AED 100%);
  border-radius:var(--radius-lg);padding:32px 36px;margin-bottom:24px;
  color:#fff;position:relative;overflow:hidden;
  box-shadow:0 12px 40px rgba(79,70,229,.35);
}
.welcome-banner::before{
  content:'';position:absolute;inset:0;
  background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.welcome-banner::after{
  content:'🎓';position:absolute;right:36px;top:50%;transform:translateY(-50%);
  font-size:90px;opacity:.1;pointer-events:none;
}
.welcome-banner h2{font-size:26px;font-weight:800;letter-spacing:-.04em;margin-bottom:6px;}
.welcome-banner p{font-size:15px;opacity:.75;font-weight:400;}
.welcome-chip{
  display:inline-flex;align-items:center;gap:6px;margin-top:16px;
  background:rgba(255,255,255,.15);backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.25);border-radius:99px;
  padding:6px 14px;font-size:12.5px;font-weight:700;
}

/* ══ BUTTONS ══ */
.btn{display:inline-flex;align-items:center;gap:7px;padding:9px 18px;border-radius:10px;
  font-size:13.5px;font-weight:600;font-family:'Inter',sans-serif;cursor:pointer;
  transition:all .2s;border:none;text-decoration:none;letter-spacing:.005em;}
.btn-grad{background:var(--grad);color:#fff;
  box-shadow:0 4px 16px rgba(79,70,229,.35),0 0 0 1px rgba(255,255,255,.1) inset;}
.btn-grad:hover{transform:translateY(-1px);box-shadow:0 6px 22px rgba(79,70,229,.5);}
.btn-grad:active{transform:translateY(0);}
.btn-outline{background:var(--surface);color:var(--primary);border:1.5px solid var(--border);
  box-shadow:var(--shadow-xs);}
.btn-outline:hover{border-color:rgba(99,102,241,.4);background:var(--surface-3);}
.btn-danger{background:rgba(239,68,68,.1);color:#EF4444;border:1.5px solid rgba(239,68,68,.2);}
.btn-danger:hover{background:rgba(239,68,68,.18);border-color:rgba(239,68,68,.4);}
.btn-ghost{background:transparent;color:var(--text-2);border:1.5px solid var(--border-2);}
.btn-ghost:hover{background:var(--surface-3);color:var(--primary);border-color:var(--border);}
.btn-warn{background:rgba(245,158,11,.1);color:#D97706;border:1.5px solid rgba(245,158,11,.25);cursor:not-allowed;}
.btn-muted{background:var(--surface-2);color:var(--text-3);border:1.5px solid var(--border-2);cursor:not-allowed;}

/* ══ BADGES ══ */
.badge{display:inline-flex;align-items:center;gap:4px;
  font-size:11px;font-weight:700;padding:3px 9px;border-radius:99px;letter-spacing:.03em;}
.badge-green {background:rgba(16,185,129,.12);color:#059669;border:1px solid rgba(16,185,129,.2);}
.badge-amber {background:rgba(245,158,11,.12);color:#B45309;border:1px solid rgba(245,158,11,.2);}
.badge-red   {background:rgba(239,68,68,.1);color:#DC2626;border:1px solid rgba(239,68,68,.2);}
.badge-blue  {background:rgba(99,102,241,.1);color:var(--primary-dark);border:1px solid rgba(99,102,241,.2);}
.badge-gray  {background:rgba(0,0,0,.05);color:var(--text-3);border:1px solid var(--border-2);}
[data-theme="dark"] .badge-gray{background:rgba(255,255,255,.06);color:var(--text-3);border-color:var(--border);}

/* ══ PROGRESS BAR ══ */
.progress-wrap{margin-bottom:14px;}
.progress-head{display:flex;justify-content:space-between;font-size:12.5px;font-weight:500;
  color:var(--text-2);margin-bottom:7px;}
.progress-head span:last-child{font-weight:700;color:var(--primary);}
.progress-bar{height:7px;background:var(--surface-3);border-radius:99px;overflow:hidden;
  border:1px solid var(--border);}
.progress-fill{height:100%;border-radius:99px;transition:width .5s cubic-bezier(.4,0,.2,1);}
.fill-grad{background:var(--grad);}
.fill-green{background:linear-gradient(90deg,#10B981,#34D399);}
.fill-violet{background:linear-gradient(90deg,#8B5CF6,#A78BFA);}

/* ══ TOAST ══ */
.toast{
  position:fixed;bottom:28px;right:28px;z-index:999;
  background:var(--surface);border-radius:14px;padding:14px 18px;
  box-shadow:var(--shadow-xl);
  display:flex;align-items:center;gap:12px;min-width:280px;max-width:360px;
  border-left:3px solid #10B981;border:1px solid var(--border);
  transform:translateY(80px);opacity:0;transition:all .4s cubic-bezier(.34,1.56,.64,1);
}
.toast.show{transform:translateY(0);opacity:1;}
.toast.t-warn{border-left-color:#F59E0B;}
.toast.t-err {border-left-color:#EF4444;}
.toast .t-icon{font-size:22px;flex-shrink:0;}
.toast h4{font-size:13.5px;font-weight:700;color:var(--text-1);}
.toast p{font-size:12px;color:var(--text-3);margin-top:2px;}

/* ══ COURSE CARDS ══ */
.course-card{
  background:var(--surface);border-radius:var(--radius-lg);
  border:1px solid var(--border);box-shadow:var(--shadow-xs);
  padding:18px 20px;display:flex;align-items:flex-start;gap:14px;
  transition:all .22s;
}
.course-card:hover{box-shadow:var(--shadow-md);transform:translateY(-1px);}
.course-card.registered{
  border-color:rgba(16,185,129,.3);
  background:linear-gradient(to right,var(--surface),rgba(16,185,129,.04));
}
.course-card.conflict{
  border-color:rgba(245,158,11,.3);
  background:linear-gradient(to right,var(--surface),rgba(245,158,11,.04));
}
.course-card.full{border-color:var(--border);opacity:.7;}
[data-theme="dark"] .course-card.registered{background:linear-gradient(to right,var(--surface),rgba(16,185,129,.06));}
[data-theme="dark"] .course-card.conflict{background:linear-gradient(to right,var(--surface),rgba(245,158,11,.06));}

.color-bar{width:4px;min-height:70px;border-radius:2px;flex-shrink:0;}
.c-body{flex:1;min-width:0;}
.c-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:8px;}
.c-code{font-size:11px;font-weight:700;color:var(--primary);letter-spacing:.06em;
  background:rgba(99,102,241,.1);border-radius:6px;padding:2px 8px;display:inline-block;}
.c-name{font-size:15px;font-weight:700;color:var(--text-1);letter-spacing:-.02em;margin-top:4px;}
.c-meta{display:flex;flex-wrap:wrap;gap:12px;font-size:12.5px;color:var(--text-3);margin-top:7px;}
.c-meta span{display:flex;align-items:center;gap:4px;}
.seat-row{margin-top:10px;display:flex;align-items:center;gap:8px;}
.seat-track{width:100px;height:5px;background:var(--surface-3);border-radius:99px;overflow:hidden;}
.seat-fill{height:100%;border-radius:99px;transition:width .3s;}
.seat-txt{font-size:11px;color:var(--text-3);}
.c-actions{display:flex;flex-direction:column;align-items:flex-end;gap:8px;flex-shrink:0;}
.c-credits{font-size:12px;font-weight:700;color:var(--text-3);}

/* ══ SCHEDULE GRID ══ */
.schedule-wrap{
  background:var(--surface);border-radius:var(--radius-lg);
  border:1px solid var(--border);box-shadow:var(--shadow-sm);overflow:hidden;
}
.grid-head{display:grid;grid-template-columns:72px repeat(5,1fr);
  background:var(--surface-2);border-bottom:1px solid var(--border);}
.head-corner{padding:16px;}
.head-day{padding:14px 10px;text-align:center;border-left:1px solid var(--border);
  font-size:12.5px;font-weight:700;color:var(--text-2);letter-spacing:.01em;}
.head-day.today{color:var(--primary);background:rgba(99,102,241,.07);}
.head-day .hdate{font-size:11px;font-weight:400;color:var(--text-3);margin-top:2px;}
.head-day.today .hdate{color:rgba(99,102,241,.7);}
.time-row{display:grid;grid-template-columns:72px repeat(5,1fr);min-height:60px;
  border-bottom:1px solid var(--border);}
.time-label{padding:10px 12px 0 0;font-size:11px;color:var(--text-3);font-weight:500;
  text-align:right;border-right:1px solid var(--border);position:relative;top:-6px;}
.time-cell{border-left:1px solid rgba(99,102,241,.06);position:relative;min-height:60px;}
.course-block{
  position:absolute;left:3px;right:3px;border-radius:10px;
  padding:7px 9px;cursor:pointer;overflow:hidden;z-index:2;
  transition:transform .18s,box-shadow .18s;
  box-shadow:0 2px 8px rgba(0,0,0,.15);
}
.course-block:hover{transform:scale(1.02);box-shadow:0 4px 16px rgba(0,0,0,.25);z-index:10;}
.course-block h4{font-size:11.5px;font-weight:700;color:#fff;line-height:1.2;}
.course-block p{font-size:10px;color:rgba(255,255,255,.8);margin-top:2px;}
.course-block .cb-room{font-size:10px;color:rgba(255,255,255,.6);margin-top:3px;}
.time-line{position:absolute;left:72px;right:0;height:2px;background:#EF4444;z-index:5;}
.time-line::before{content:'';position:absolute;left:-4px;top:-4px;
  width:10px;height:10px;background:#EF4444;border-radius:50%;}

/* ══ MINI GRID ══ */
.mini-grid{border:1px solid var(--border);border-radius:10px;overflow:hidden;font-size:11px;}
.mini-grid-head{display:grid;grid-template-columns:38px repeat(5,1fr);
  background:var(--surface-2);border-bottom:1px solid var(--border);}
.mini-cell-head{padding:5px 3px;text-align:center;font-weight:700;color:var(--text-3);
  border-right:1px solid var(--border);font-size:9.5px;letter-spacing:.04em;}
.mini-row{display:grid;grid-template-columns:38px repeat(5,1fr);min-height:20px;}
.mini-time{padding:3px 5px;font-size:9.5px;color:var(--text-3);text-align:right;
  border-right:1px solid var(--border);border-bottom:1px solid rgba(99,102,241,.06);}
.mini-slot{border-right:1px solid rgba(99,102,241,.06);border-bottom:1px solid rgba(99,102,241,.06);position:relative;}
.mini-block{position:absolute;inset:1px;border-radius:3px;display:flex;align-items:center;
  justify-content:center;font-size:8.5px;font-weight:800;color:#fff;overflow:hidden;white-space:nowrap;padding:0 2px;}

/* ══ FILTERS ══ */
.filter-chip{
  display:inline-flex;align-items:center;padding:5px 11px;border-radius:99px;
  font-size:12px;font-weight:600;border:1.5px solid var(--border-2);
  color:var(--text-2);cursor:pointer;margin:3px 3px 3px 0;transition:all .15s;
  background:var(--surface);
}
.filter-chip:hover{border-color:rgba(99,102,241,.3);color:var(--primary);}
.filter-chip.active{border-color:rgba(99,102,241,.4);background:rgba(99,102,241,.1);color:var(--primary-dark);font-weight:700;}
[data-theme="dark"] .filter-chip{background:var(--surface-2);border-color:var(--border);}
[data-theme="dark"] .filter-chip.active{background:rgba(99,102,241,.15);border-color:rgba(99,102,241,.35);}

/* ══ SEARCH INPUT ══ */
.search-wrap{position:relative;margin-bottom:16px;}
.search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-3);}
.search-input{
  width:100%;padding:12px 14px 12px 42px;
  background:var(--surface);border:1.5px solid var(--border-2);border-radius:12px;
  font-size:13.5px;color:var(--text-1);outline:none;font-family:'Inter',sans-serif;
  transition:border-color .2s,box-shadow .2s;
}
.search-input::placeholder{color:var(--text-3);}
.search-input:focus{border-color:rgba(99,102,241,.5);box-shadow:0 0 0 3px rgba(99,102,241,.12);}
[data-theme="dark"] .search-input{background:var(--surface-2);border-color:var(--border);}

/* ══ REGISTERED LIST ══ */
.reg-item{display:flex;align-items:center;gap:10px;padding:10px 0;
  border-bottom:1px solid var(--border);}
.reg-item:last-child{border-bottom:none;}
.reg-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0;}
.reg-info h5{font-size:12.5px;font-weight:700;color:var(--text-1);}
.reg-info p{font-size:11px;color:var(--text-3);margin-top:2px;}
.reg-remove{margin-left:auto;background:none;border:none;cursor:pointer;
  color:var(--text-3);font-size:14px;transition:color .15s;}
.reg-remove:hover{color:#EF4444;}

/* ══ INFO ROWS (Profile) ══ */
.info-row{display:flex;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--border);}
.info-row:last-child{border-bottom:none;}
.info-label{font-size:12px;font-weight:600;color:var(--text-3);width:150px;flex-shrink:0;padding-top:1px;letter-spacing:.01em;}
.info-value{font-size:14px;color:var(--text-1);font-weight:500;}

/* ══ CONTENT LAYOUT ══ */
.content-row{display:grid;grid-template-columns:1fr 340px;gap:20px;}
.col-stack{display:flex;flex-direction:column;gap:18px;}
.sidebar-stack{display:flex;flex-direction:column;gap:16px;position:sticky;top:calc(var(--nav-h) + 20px);}

/* ══ ACTION CARDS (dashboard) ══ */
.actions-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.action-card{
  display:flex;align-items:center;gap:14px;padding:16px;
  border-radius:14px;border:1.5px solid var(--border-2);
  text-decoration:none;color:var(--text-1);background:var(--surface);
  transition:all .22s;cursor:pointer;
}
.action-card:hover{border-color:rgba(99,102,241,.3);background:var(--surface-3);
  transform:translateY(-2px);box-shadow:var(--shadow-md);}
.action-card:hover .ac-icon{background:var(--grad);box-shadow:0 4px 12px rgba(79,70,229,.3);}
.action-card:hover .ac-icon span{filter:brightness(10);}
.ac-icon{width:44px;height:44px;border-radius:12px;background:var(--surface-3);
  display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;
  border:1px solid var(--border);transition:all .22s;}
.ac-title{font-size:13.5px;font-weight:700;color:var(--text-1);}
.ac-sub{font-size:11.5px;color:var(--text-3);margin-top:2px;}

/* ══ SCHEDULE TODAY LIST ══ */
.class-item{display:flex;align-items:center;gap:14px;padding:13px 0;border-bottom:1px solid var(--border);}
.class-item:last-child{border-bottom:none;}
.class-time{font-size:11.5px;color:var(--text-3);font-weight:600;width:72px;flex-shrink:0;text-align:right;}
.class-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0;}
.class-info h4{font-size:13.5px;font-weight:700;color:var(--text-1);}
.class-info p{font-size:12px;color:var(--text-3);margin-top:2px;}

/* ══ ANNOUNCEMENTS ══ */
.ann-item{padding:13px 0;border-bottom:1px solid var(--border);}
.ann-item:last-child{border-bottom:none;}
.ann-head{display:flex;align-items:center;gap:8px;margin-bottom:4px;}
.ann-title{font-size:13.5px;font-weight:700;color:var(--text-1);}
.ann-text{font-size:12.5px;color:var(--text-2);}
.ann-date{font-size:11px;color:var(--text-3);margin-top:4px;}

/* ══ GPA DISPLAY ══ */
.gpa-display{text-align:center;padding:20px 16px;
  background:linear-gradient(135deg,rgba(99,102,241,.08),rgba(124,58,237,.08));
  border-radius:14px;border:1px solid var(--border);margin-bottom:16px;}
.gpa-number{font-size:54px;font-weight:900;color:var(--primary);line-height:1;letter-spacing:-.04em;}
.gpa-max{font-size:16px;color:var(--text-3);}
.gpa-label{font-size:12px;color:var(--text-3);margin-top:6px;}
.gpa-chip{display:inline-block;background:rgba(16,185,129,.12);color:#059669;
  border:1px solid rgba(16,185,129,.2);font-size:11.5px;font-weight:700;
  padding:4px 12px;border-radius:99px;margin-top:8px;}

/* ══ GRADE ROWS ══ */
.grade-row{display:flex;align-items:center;justify-content:space-between;
  padding:10px 0;border-bottom:1px solid var(--border);font-size:13px;}
.grade-row:last-child{border-bottom:none;}
.grade-course{font-weight:700;color:var(--text-1);}
.grade-badge{font-size:12.5px;font-weight:800;padding:4px 12px;border-radius:99px;}
.grade-A{background:rgba(16,185,129,.12);color:#059669;border:1px solid rgba(16,185,129,.2);}
.grade-B{background:rgba(99,102,241,.1);color:var(--primary-dark);border:1px solid rgba(99,102,241,.2);}

/* ══ EMPTY STATE ══ */
.empty{text-align:center;padding:44px 20px;color:var(--text-3);}
.empty .ei{font-size:40px;margin-bottom:10px;}
.empty p{font-size:14px;line-height:1.6;}

/* ══ CREDIT METER ══ */
.credits-meter{text-align:center;padding:8px 0;}
.credits-big{font-size:42px;font-weight:900;color:var(--primary);letter-spacing:-.04em;line-height:1;}
.credits-max{font-size:13px;color:var(--text-3);margin-top:2px;}
.credits-bar-wrap{margin:12px 0;height:8px;background:var(--surface-3);
  border-radius:99px;overflow:hidden;border:1px solid var(--border);}
.credits-bar-fill{height:100%;border-radius:99px;background:var(--grad);transition:width .5s cubic-bezier(.4,0,.2,1);}
.credits-warn{font-size:12px;color:#B45309;font-weight:600;margin-top:6px;
  padding:7px 12px;background:rgba(245,158,11,.1);border-radius:8px;
  border:1px solid rgba(245,158,11,.2);}

/* ══ PROFILE HERO ══ */
.profile-hero{
  background:linear-gradient(130deg,#3730A3 0%,#4F46E5 40%,#6D28D9 75%,#7C3AED 100%);
  border-radius:var(--radius-lg);padding:36px 40px;margin-bottom:24px;
  display:flex;align-items:center;gap:28px;color:#fff;position:relative;overflow:hidden;
  box-shadow:0 16px 48px rgba(79,70,229,.35);
}
.profile-hero::before{content:'';position:absolute;inset:0;
  background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");}
.avatar-hero{width:92px;height:92px;border-radius:20px;flex-shrink:0;
  background:rgba(255,255,255,.2);border:3px solid rgba(255,255,255,.4);
  display:flex;align-items:center;justify-content:center;
  font-size:34px;font-weight:900;color:#fff;letter-spacing:-2px;
  backdrop-filter:blur(8px);}
.hero-name{font-size:28px;font-weight:900;letter-spacing:-.05em;margin-bottom:4px;}
.hero-sub{font-size:15px;opacity:.75;}
.hero-tags{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap;}
.hero-tag{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);
  color:#fff;font-size:12px;font-weight:600;padding:5px 12px;border-radius:99px;
  backdrop-filter:blur(4px);}

/* ══ COURSE PILLS ══ */
.course-pill{display:flex;align-items:center;gap:14px;background:var(--surface);
  border-radius:14px;padding:14px 18px;box-shadow:var(--shadow-xs);
  border:1px solid var(--border);transition:all .2s;}
.course-pill:hover{box-shadow:var(--shadow-md);}
.pill-bar{width:4px;height:44px;border-radius:2px;flex-shrink:0;}
.pill-info h5{font-size:14px;font-weight:700;color:var(--text-1);}
.pill-info p{font-size:12px;color:var(--text-3);margin-top:2px;}
.pill-credits{margin-left:auto;background:var(--surface-3);color:var(--text-2);
  font-size:12px;font-weight:700;padding:5px 12px;border-radius:99px;
  border:1px solid var(--border);}

/* ══ SUM CARDS ══ */
.sum-card{background:var(--surface);border-radius:var(--radius-lg);
  padding:20px 22px;box-shadow:var(--shadow-sm);border:1px solid var(--border);
  transition:all .2s;}
.sum-card:hover{box-shadow:var(--shadow-md);}
.sum-label{font-size:12px;color:var(--text-3);font-weight:500;margin-bottom:6px;letter-spacing:.01em;}
.sum-value{font-size:26px;font-weight:900;color:var(--text-1);letter-spacing:-.04em;}
.sum-sub{font-size:12px;color:var(--text-3);margin-top:3px;}

/* ══ DIVIDER ══ */
.divider-line{height:1px;background:var(--border);margin:20px 0;}

/* ══ INFO ALERT ══ */
.info-alert{
  background:rgba(99,102,241,.08);border:1px solid rgba(99,102,241,.2);
  border-radius:12px;padding:12px 16px;font-size:13px;color:var(--primary-dark);
  margin-bottom:20px;display:flex;align-items:flex-start;gap:10px;line-height:1.5;
}
[data-theme="dark"] .info-alert{color:#A5B4FC;background:rgba(99,102,241,.1);border-color:rgba(99,102,241,.25);}

/* ══ CREDIT BADGE ══ */
.credit-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(99,102,241,.1);color:var(--primary-dark);
  font-size:13px;font-weight:700;padding:8px 16px;border-radius:99px;
  border:1px solid rgba(99,102,241,.2);white-space:nowrap;
}
[data-theme="dark"] .credit-badge{background:rgba(99,102,241,.15);color:#A5B4FC;border-color:rgba(99,102,241,.25);}

/* ══════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════ */

/* Hamburger button — hidden on desktop */
.hamburger{
  display:none;width:38px;height:38px;border-radius:10px;
  border:1px solid var(--border);background:var(--surface);
  align-items:center;justify-content:center;
  cursor:pointer;color:var(--text-2);flex-shrink:0;transition:all .2s;
}
.hamburger:hover{background:var(--surface-3);border-color:rgba(99,102,241,.3);}

/* Sidebar backdrop overlay */
.sb-overlay{
  display:none;position:fixed;inset:0;z-index:150;
  background:rgba(0,0,0,.45);backdrop-filter:blur(3px);
}
.sb-overlay.active{display:block;}

/* Scroll wrapper for schedule grid */
.sched-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius-lg);}
.sched-scroll .schedule-wrap{min-width:620px;border-radius:0;}

/* Mobile filter toggle button */
.filter-toggle{
  display:none;width:100%;padding:10px 14px;margin-bottom:14px;
  border-radius:12px;border:1.5px solid var(--border-2);background:var(--surface);
  font-family:'Inter',sans-serif;font-size:13.5px;font-weight:600;color:var(--text-2);
  cursor:pointer;text-align:left;transition:all .2s;
}
.filter-toggle:hover{border-color:rgba(99,102,241,.3);color:var(--primary);}

/* ── All non-desktop (<1024px): sidebar = slide-in drawer ── */
@media(max-width:1023px){
  .hamburger{display:flex;}
  .sidebar{
    transform:translateX(-110%);z-index:200;box-shadow:none;
    top:0;padding-top:calc(var(--nav-h) + 20px);
  }
  .sidebar.open{transform:translateX(0);box-shadow:8px 0 48px rgba(0,0,0,.28);}
  .main{margin-left:0 !important;}
  .welcome-banner::after{font-size:64px;right:20px;}
}

/* ── Tablet (768–1023px) ── */
@media(min-width:768px) and (max-width:1023px){
  .main{padding:24px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .content-row{grid-template-columns:1fr;}
  .summary-row{grid-template-columns:repeat(2,1fr);}
  .courses-row{grid-template-columns:1fr 1fr;}
  .layout{grid-template-columns:1fr 260px;}
  .layout > .filters{display:none;}
  .filter-toggle{display:block;}
  .grid-3{grid-template-columns:1fr 1fr;}
  .sidebar-stack{position:sticky;top:calc(var(--nav-h) + 20px);}
}

/* ── Mobile (<768px) ── */
@media(max-width:767px){
  :root{--nav-h:58px;--sidebar-w:78vw;}

  .navbar{padding:0 14px;}
  .nav-user{display:none;}
  .nav-logo span{font-size:14px;}
  .nav-right{gap:8px;}

  .main{padding:14px 12px 52px;}

  /* Stats: 2 col */
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:16px;}
  .stat-card{padding:14px 12px;gap:10px;}
  .stat-icon{width:40px;height:40px;border-radius:12px;font-size:18px;}
  .stat-value{font-size:20px;}
  .stat-sub{display:none;}

  /* Layout */
  .content-row{grid-template-columns:1fr;}
  .col-stack{gap:12px;}
  .card-inner{padding:14px;}

  /* Quick actions: 2 col */
  .actions-grid{grid-template-columns:1fr 1fr;gap:8px;}
  .action-card{padding:12px 10px;gap:10px;}
  .ac-icon{width:36px;height:36px;font-size:16px;border-radius:10px;}
  .ac-title{font-size:12.5px;}
  .ac-sub{font-size:11px;}

  /* Welcome banner */
  .welcome-banner{padding:20px 16px;}
  .welcome-banner h2{font-size:18px;}
  .welcome-banner p{font-size:13px;}
  .welcome-banner::after{display:none;}
  .welcome-chip{font-size:11px;padding:5px 10px;}

  /* Page header */
  .page-hrow{flex-direction:column;align-items:flex-start;gap:10px;}
  .page-hrow h1{font-size:19px;}
  .credit-badge{font-size:12px;padding:6px 12px;}

  /* Courses layout: stacked */
  .layout{grid-template-columns:1fr;}
  .layout > .filters{display:none;}
  .layout > .filters.show{display:block;margin-bottom:14px;}
  .filter-toggle{display:block;}
  .sidebar-stack{position:static !important;top:auto !important;}

  /* Course cards: stack color-bar top, actions bottom */
  .course-card{flex-wrap:wrap;gap:10px;padding:14px;}
  .color-bar{width:100%;min-height:3px;height:3px;border-radius:2px;order:-1;}
  .c-body{min-width:0;width:100%;}
  .c-actions{flex-direction:row;align-items:center;justify-content:space-between;width:100%;flex-shrink:0;}
  .c-meta{font-size:12px;gap:8px;}

  /* Schedule */
  .summary-row{grid-template-columns:repeat(2,1fr);gap:10px;}
  .courses-row{grid-template-columns:1fr;}
  .sum-value{font-size:22px;}
  .sum-card{padding:14px;}

  /* Profile */
  .grid-2,.grid-3{grid-template-columns:1fr;}
  .profile-hero{padding:20px 16px;flex-direction:column;align-items:flex-start;gap:14px;}
  .avatar-hero{width:64px;height:64px;font-size:22px;border-radius:14px;}
  .hero-name{font-size:22px;}
  .hero-sub{font-size:13px;}
  .hero-tags{gap:6px;margin-top:10px;}
  .hero-tag{font-size:11px;padding:4px 10px;}
  .gpa-number{font-size:44px;}

  /* Info rows */
  .info-label{width:130px;font-size:11.5px;}
  .info-value{font-size:13px;}

  /* Announcements */
  .ann-title{font-size:13px;}

  /* Toast */
  .toast{left:12px;right:12px;bottom:16px;min-width:unset;max-width:unset;}
}

/* ── Small phone (<480px) ── */
@media(max-width:479px){
  :root{--sidebar-w:84vw;}

  .main{padding:10px 10px 52px;}
  .card-inner{padding:12px;}

  /* Navbar compact */
  .nav-right{gap:6px;}
  .icon-btn{width:34px;height:34px;}
  .hamburger{width:34px;height:34px;}
  .avatar{width:34px;height:34px;font-size:12px;}
  .nav-logo span{font-size:13px;}

  /* Stats compact */
  .stats-grid{gap:8px;}
  .stat-card{padding:12px 10px;gap:8px;}
  .stat-value{font-size:19px;}
  .stat-icon{width:36px;height:36px;font-size:16px;}

  /* Welcome */
  .welcome-banner{padding:16px 14px;}
  .welcome-banner h2{font-size:16px;}
  .page-hrow h1{font-size:17px;}

  /* Quick actions: stack label only, hide sub */
  .action-card{flex-direction:column;align-items:flex-start;gap:6px;padding:12px;}
  .ac-sub{display:none;}

  /* Course cards even more compact */
  .course-card{padding:12px;}
  .c-name{font-size:13.5px;}
  .c-meta{font-size:11px;gap:6px;}

  /* Info rows: stack label above value */
  .info-row{flex-direction:column;gap:2px;padding:10px 0;}
  .info-label{width:auto;}
  .info-value{font-size:13px;}

  /* Grade rows: wrap on tiny */
  .grade-row{flex-wrap:wrap;gap:4px;}

  /* Profile hero */
  .hero-name{font-size:20px;}
  .hero-tags{gap:4px;}
  .hero-tag{font-size:10px;padding:3px 8px;}
  .gpa-number{font-size:38px;}

  /* Schedule summary cards */
  .sum-value{font-size:20px;}
  .sum-card{padding:12px;}

  /* Mini grid: allow scroll */
  .mini-grid{overflow-x:auto;}

  /* Toast */
  .toast{left:8px;right:8px;padding:12px 14px;}
  .toast h4{font-size:13px;}
}