*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f1117;
  --bg2:#161b25;
  --bg3:#1e2535;
  --bg4:#252d40;
  --border:#2a3348;
  --border2:#3a4a6a;
  --text:#e8edf5;
  --text2:#8a9bbf;
  --text3:#5a6a8a;
  --accent:#3d7fff;
  --accent2:#2563eb;
  --accent-glow:rgba(61,127,255,0.15);
  --green:#22c55e;
  --amber:#f59e0b;
  --red:#ef4444;
  --purple:#a78bfa;
  --r:10px;
  --r2:14px;
}
html,body{height:100%;font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);overflow:hidden}
a{color:inherit;text-decoration:none}
button{font-family:'DM Sans',sans-serif;cursor:pointer}
input{font-family:'DM Sans',sans-serif}

/* ── LOGIN SCREEN ── */
#login-screen {
  position: fixed; inset: 0; background: var(--bg); z-index: 9999;
  display: flex; align-items: center; justify-content: center;
}
.login-card {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--r2);
  padding: 32px 28px; width: 100%; max-width: 360px;
  display: flex; flex-direction: column; gap: 16px; box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.login-title { font-size: 20px; font-weight: 600; color: var(--text); text-align: center; margin-bottom: 8px;}
.login-input {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; font-size: 14px; color: var(--text); outline: none; transition: border-color 0.2s;
}
.login-input::placeholder { color: var(--text3); }
.login-input:focus { border-color: var(--accent); }
.login-btn {
  background: var(--accent); color: #fff; border: none; border-radius: 8px;
  padding: 12px; font-size: 14px; font-weight: 600; cursor: pointer; margin-top: 8px; transition: background 0.2s;
}
.login-btn:hover { background: var(--accent2); }
.login-btn:disabled { opacity: 0.7; cursor: not-allowed; }
.login-error { color: var(--red); font-size: 12.5px; text-align: center; min-height: 18px; font-weight: 500;}

/* ── LAYOUT ── */
.app{display:flex;height:100dvh;overflow:hidden}

/* ── SIDEBAR ── */
.sidebar{
  width:230px;min-width:230px;
  background:var(--bg2);
  border-right:1px solid var(--border);
  display:flex;flex-direction:column;
  overflow-y:auto;overflow-x:hidden;
}
.sidebar::-webkit-scrollbar{width:4px}
.sidebar::-webkit-scrollbar-thumb{background:var(--border2);border-radius:4px}

.sidebar-logo{
  padding:20px 18px 16px;
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;gap:10px;
  flex-shrink:0;
}
.logo-icon{
  width:34px;height:34px;
  background:var(--accent);
  border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  font-family:'Space Mono',monospace;font-size:13px;font-weight:700;color:#fff;
  flex-shrink:0;
}
.logo-text{font-size:14px;font-weight:600;color:var(--text);letter-spacing:-0.3px}
.logo-sub{font-size:11px;color:var(--text3);margin-top:1px}

.nav-section{padding:12px 10px 4px}
.nav-label{
  font-size:10px;font-weight:600;color:var(--text3);
  letter-spacing:0.8px;text-transform:uppercase;
  padding:0 8px;margin-bottom:4px;
}
.nav-item{
  display:flex;align-items:center;gap:10px;
  padding:8px 10px;border-radius:var(--r);
  border:none;background:none;width:100%;text-align:left;
  color:var(--text2);font-size:13.5px;font-weight:400;
  transition:all 0.15s;cursor:pointer;
  margin-bottom:1px;
}
.nav-item:hover{background:var(--bg3);color:var(--text)}
.nav-item.active{background:var(--accent-glow);color:var(--accent);font-weight:500}
.nav-icon{width:16px;height:16px;flex-shrink:0}

/* ── MAIN ── */
.main{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}

.topbar{
  background:var(--bg2);border-bottom:1px solid var(--border);
  padding:0 24px;height:56px;
  display:flex;align-items:center;gap:14px;flex-shrink:0;
}
.topbar-title{font-size:15px;font-weight:600;color:var(--text);flex:1}

.avatar{
  width:32px;height:32px;background:var(--accent);
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:600;color:#fff;cursor:pointer;flex-shrink:0;
  overflow: hidden;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }

.notif-btn{
  background:var(--bg3);border:1px solid var(--border);
  border-radius:8px;width:34px;height:34px;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;position:relative;flex-shrink:0;
  margin-left: auto;
}

.content{flex:1;overflow-y:auto;padding:20px 24px;display:flex;flex-direction:column;gap:18px}
.content::-webkit-scrollbar{width:4px}
.content::-webkit-scrollbar-thumb{background:var(--border2);border-radius:4px}

/* PAGE SECTIONS */
.page{display:none;flex-direction:column;gap:18px}
.page.active{display:flex}

/* ── CARDS ── */
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.stat-card{
  background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--r2);padding:16px 18px;
}
.stat-label{font-size:11px;color:var(--text3);font-weight:500;letter-spacing:0.3px;text-transform:uppercase;margin-bottom:8px}
.stat-val{font-size:22px;font-weight:600;color:var(--text);font-family:'Space Mono',monospace;margin-bottom:4px}
.stat-sub{font-size:12px;color:var(--text3)}
.stat-sub .up{color:var(--green)}
.stat-sub .dn{color:var(--red)}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.three-col{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
.card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r2);padding:18px 20px}
.full-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r2);padding:18px 20px}
.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.card-title{font-size:13px;font-weight:600;color:var(--text);letter-spacing:-0.2px}
.card-action{font-size:12px;color:var(--accent);cursor:pointer;font-weight:500}

/* EXAM ITEMS */
.exam-item{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--border)}
.exam-item:last-child{border-bottom:none;padding-bottom:0}
.exam-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.exam-info{flex:1;min-width:0}
.exam-name{font-size:13px;font-weight:500;color:var(--text);margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.exam-date{font-size:11px;color:var(--text3)}
.exam-badge{font-size:11px;font-weight:500;padding:2px 8px;border-radius:20px;white-space:nowrap}
.badge-upcoming{background:rgba(61,127,255,0.15);color:var(--accent)}
.badge-live{background:rgba(239,68,68,0.15);color:var(--red)}
.badge-done{background:rgba(34,197,94,0.12);color:var(--green)}

/* SUBJECT BARS */
.subject-bar{margin-bottom:10px}
.subject-bar:last-child{margin-bottom:0}
.sb-top{display:flex;justify-content:space-between;margin-bottom:5px}
.sb-name{font-size:12px;color:var(--text2);font-weight:500}
.sb-val{font-size:12px;color:var(--text3);font-family:'Space Mono',monospace}
.sb-track{height:5px;background:var(--bg4);border-radius:4px;overflow:hidden}
.sb-fill{height:100%;border-radius:4px}

/* CLASS ITEMS */
.class-item{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px solid var(--border)}
.class-item:last-child{border-bottom:none;padding-bottom:0}
.class-time{font-size:11px;color:var(--text3);font-family:'Space Mono',monospace;min-width:48px}
.class-info{flex:1;min-width:0}
.class-name{font-size:13px;font-weight:500;color:var(--text);margin-bottom:1px}
.class-teacher{font-size:11px;color:var(--text3)}
.class-btn{
  background:var(--accent);color:#fff;border:none;
  border-radius:6px;padding:5px 12px;
  font-size:11px;font-weight:600;
}
.class-btn.gray{background:var(--bg3);color:var(--text2);border:1px solid var(--border)}

/* NOTICE */
.notice-item{
  padding:10px 12px;background:var(--bg3);
  border-radius:var(--r);margin-bottom:8px;
  border-left:3px solid var(--accent);
}
.notice-item:last-child{margin-bottom:0}
.notice-item.amber{border-left-color:var(--amber)}
.notice-item.red{border-left-color:var(--red)}
.notice-title{font-size:13px;font-weight:500;color:var(--text);margin-bottom:2px}
.notice-time{font-size:11px;color:var(--text3)}

/* TIMETABLE */
.tt-grid{display:grid;grid-template-columns:60px repeat(6,1fr);gap:1px;background:var(--border);border-radius:var(--r);overflow:hidden;font-size:12px}
.tt-cell{background:var(--bg2);padding:8px 10px}
.tt-header{background:var(--bg3);font-weight:600;font-size:11px;color:var(--text3);text-transform:uppercase;letter-spacing:0.5px}
.tt-time{font-family:'Space Mono',monospace;font-size:11px;color:var(--text3)}
.tt-class{border-radius:6px;padding:6px 8px;font-size:11px;font-weight:500}
.tt-phy{background:rgba(61,127,255,0.15);color:var(--accent)}
.tt-chem{background:rgba(167,139,250,0.15);color:var(--purple)}
.tt-math{background:rgba(34,197,94,0.12);color:var(--green)}
.tt-empty{color:var(--text3);font-size:11px}
.tt-select{background:var(--bg3);border:1px solid var(--border);border-radius:8px;padding:6px 12px;font-size:13px;color:var(--text);outline:none;cursor:pointer;text-overflow:ellipsis;white-space:nowrap;overflow:hidden;}
.tt-select:focus{border-color:var(--accent);}

/* EXAM HALL */
.exam-hall-item{
  display:flex;align-items:center;gap:16px;
  padding:14px 16px;background:var(--bg3);
  border:1px solid var(--border);border-radius:var(--r2);margin-bottom:10px;
}
.exam-hall-item:last-child{margin-bottom:0}
.exam-hall-icon{
  width:42px;height:42px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.exam-hall-info{flex:1;min-width:0}
.exam-hall-name{font-size:14px;font-weight:600;color:var(--text);margin-bottom:3px}
.exam-hall-meta{font-size:12px;color:var(--text3)}
.exam-hall-right{text-align:right;flex-shrink:0}
.exam-hall-score{font-size:16px;font-weight:700;font-family:'Space Mono',monospace}
.exam-hall-rank{font-size:11px;color:var(--text3);margin-top:2px}
.start-btn{
  background:var(--accent);color:#fff;border:none;
  border-radius:8px;padding:8px 16px;font-size:12px;font-weight:600;cursor:pointer;
  margin-top:6px;
}
.start-btn.gray{background:var(--bg4);color:var(--text2);border:1px solid var(--border)}
.start-btn:disabled{opacity:0.55;cursor:not-allowed}

/* RESULT MODAL */
.result-modal-card{background:var(--bg2);border:1px solid var(--border2);border-radius:12px;max-width:860px;width:100%;max-height:86vh;overflow:auto}
.result-title{font-size:15px;color:var(--text);font-weight:700;line-height:1.35}
.result-sub{font-size:12px;color:var(--text3);margin-top:4px}
.result-hero{display:grid;grid-template-columns:1.4fr repeat(3,minmax(0,1fr));gap:10px;margin-top:12px}
.result-hero-score{background:linear-gradient(135deg,rgba(61,127,255,0.22),rgba(34,197,94,0.12));border:1px solid rgba(61,127,255,0.34);border-radius:12px;padding:16px;min-width:0}
.result-hero-label{font-size:11px;color:var(--text2);font-weight:700;text-transform:uppercase;letter-spacing:0.5px}
.result-hero-value{font-size:34px;color:var(--text);font-family:'Space Mono',monospace;font-weight:700;line-height:1.1;margin-top:8px;word-break:break-word}
.result-hero-sub{font-size:12px;color:var(--text3);margin-top:6px}
.result-hero-stat{background:var(--bg3);border:1px solid var(--border);border-radius:12px;padding:14px;min-width:0}
.result-hero-stat .result-value{font-size:18px;margin-top:8px}
.result-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:10px}
.result-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.result-metric{padding:10px;background:var(--bg3);border:1px solid var(--border);border-radius:8px;min-width:0}
.result-label{font-size:10.5px;color:var(--text3);text-transform:uppercase;font-weight:700;letter-spacing:0.4px}
.result-value{font-size:13px;color:var(--text);font-family:'Space Mono',monospace;margin-top:3px;word-break:break-word}
.result-section-title{margin-top:14px;font-size:13px;color:var(--text);font-weight:700}
.result-chip-row{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.result-chip{font-size:11px;color:var(--text2);background:var(--bg3);border:1px solid var(--border);border-radius:999px;padding:4px 8px}
.subject-result-card{padding:12px;background:var(--bg3);border:1px solid var(--border);border-radius:10px;margin-top:8px}
.subject-result-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.subject-result-name{font-size:13px;color:var(--text);font-weight:700}
.subject-result-score{font-size:22px;color:var(--accent);font-family:'Space Mono',monospace;font-weight:700;white-space:nowrap;line-height:1}
.subject-highlight-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:10px}
.subject-result-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;margin-top:8px}
.mini-metric{background:var(--bg2);border:1px solid var(--border);border-radius:7px;padding:7px;min-width:0}
.mini-label{font-size:10px;color:var(--text3)}
.mini-value{font-size:12px;color:var(--text);font-family:'Space Mono',monospace;margin-top:2px;word-break:break-word}
.mini-metric.major{background:rgba(61,127,255,0.09);border-color:rgba(61,127,255,0.25)}
.mini-metric.major .mini-value{font-size:14px;color:var(--text);font-weight:700}
.result-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.result-link{font-size:12px;color:var(--accent);border:1px solid rgba(61,127,255,0.3);background:rgba(61,127,255,0.1);border-radius:8px;padding:7px 10px}
.leaderboard-wrap{margin-top:8px;border:1px solid var(--border);border-radius:10px;overflow:auto;background:var(--bg3)}
.leaderboard-table{width:100%;border-collapse:collapse;min-width:560px;font-size:12px}
.leaderboard-table th,.leaderboard-table td{padding:8px 10px;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}
.leaderboard-table th{font-size:10.5px;color:var(--text3);text-transform:uppercase;background:var(--bg4);font-weight:700;letter-spacing:0.4px}
.leaderboard-table td{color:var(--text2)}
.leaderboard-table tr:last-child td{border-bottom:none}
.leaderboard-rank{color:var(--accent);font-family:'Space Mono',monospace;font-weight:700}
.leaderboard-score{color:var(--text);font-family:'Space Mono',monospace;font-weight:700}
.leaderboard-subjects{display:flex;gap:5px;flex-wrap:wrap}
.leaderboard-subject{border:1px solid var(--border);background:var(--bg2);border-radius:999px;padding:2px 7px;color:var(--text2);font-family:'Space Mono',monospace;font-size:11px}
.leaderboard-card-list{display:none;flex-direction:column;gap:8px;margin-top:8px}
.leaderboard-card{background:var(--bg3);border:1px solid var(--border);border-radius:10px;padding:10px}
.leaderboard-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}
.leaderboard-rank-pill{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(61,127,255,0.14);border:1px solid rgba(61,127,255,0.28);color:var(--accent);font-family:'Space Mono',monospace;font-weight:700;flex-shrink:0}
.leaderboard-card-score{text-align:right}
.leaderboard-card-score .leaderboard-score{font-size:18px;display:block}

/* MESSAGES */
#page-messages.active { display: flex; flex-direction: row; height: calc(100vh - 114px); gap: 16px; padding: 0; }
.msg-sidebar {
  width: 320px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--r2);
  display: flex; flex-direction: column; flex-shrink: 0; overflow: hidden;
}
.msg-content {
  flex: 1; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--r2);
  display: flex; flex-direction: column; min-width: 0; overflow: hidden;
}
.msg-group-item {
  display: flex; align-items: center; gap: 12px; padding: 12px; background: var(--bg3);
  border: 1px solid var(--border); border-radius: var(--r); cursor: pointer; transition: all 0.15s;
}
.msg-group-item:hover, .msg-group-item.active { border-color: var(--accent); }
.msg-group-item.unread { border-left: 3px solid var(--accent); }
.msg-group-icon { width: 38px; height: 38px; border-radius: 50%; object-fit: cover; background: var(--bg4); flex-shrink: 0; }
.msg-group-icon-fallback {
  width: 38px; height: 38px; border-radius: 50%; background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600; flex-shrink: 0;
}
.msg-bubble {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 12px 12px 12px 2px;
  padding: 12px 16px; width: fit-content; max-width: 85%; align-self: flex-start;
}
.msg-bubble-text { font-size: 13px; color: var(--text); line-height: 1.5; white-space: pre-wrap; word-break: break-word; }
.msg-bubble-meta { font-size: 11px; color: var(--text3); margin-top: 6px; text-align: right; }
.msg-back{
  display:none;
  background:var(--bg4);
  border:1px solid var(--border);
  color:var(--text2);
  border-radius:8px;
  padding:6px 10px;
  font-size:12px;
  font-weight:600;
}

/* COURSES */
.course-card{
  background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--r2);padding:18px;
  display:flex;flex-direction:column;gap:12px;
}
.course-badge{
  display:inline-block;font-size:10px;font-weight:600;
  padding:2px 8px;border-radius:20px;text-transform:uppercase;letter-spacing:0.5px;
  width:fit-content;
}
.course-name{font-size:15px;font-weight:600;color:var(--text)}
.course-sub{font-size:12px;color:var(--text3)}
.course-prog-bar{height:4px;background:var(--bg4);border-radius:4px;overflow:hidden;margin-top:4px}
.course-prog-fill{height:100%;border-radius:4px;background:var(--accent)}
.course-bottom{display:flex;align-items:center;justify-content:space-between}
.course-pct{font-size:12px;color:var(--text2);font-weight:500}
.course-btn{
  background:var(--bg3);color:var(--accent);
  border:1px solid rgba(61,127,255,0.3);border-radius:6px;
  padding:5px 12px;font-size:12px;font-weight:500;cursor:pointer;
}

/* SCROLLBAR */
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:4px}

/* MOBILE */
@media(max-width:768px){
  .sidebar{
    position:fixed;left:0;top:0;bottom:0;z-index:100;
    transform:translateX(-100%);transition:transform 0.25s;
    width:240px;
  }
  .sidebar.open{transform:translateX(0)}
  .main{width:100%}
  .stats-row{grid-template-columns:1fr}
  .stat-card{padding:14px}
  .stat-val{font-size:19px}
  .two-col{grid-template-columns:1fr}
  .three-col{grid-template-columns:1fr}
  .hamburger{display:flex!important}
  .content{padding:14px 14px 90px;height:calc(100dvh - 56px);overflow-y:auto}
  .topbar{padding:0 12px;position:sticky;top:0;z-index:90}
  .topbar-title{font-size:14px}
  .notif-btn{margin-left:0}
  .avatar{width:30px;height:30px}
  .card,.full-card{padding:14px}
  .exam-hall-item{align-items:flex-start;gap:12px;padding:12px}
  .exam-hall-right{text-align:left;margin-left:54px;margin-top:-4px}
  .exam-hall-score{font-size:14px}
  .login-card{max-width:100%;margin:0 14px;padding:24px 18px}
  .result-modal-card{max-height:92dvh;border-radius:10px}
  .result-hero{grid-template-columns:1fr}
  .result-hero-value{font-size:30px}
  .result-grid,.result-grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}
  .subject-result-head{flex-direction:column;gap:4px}
  .subject-highlight-grid{grid-template-columns:1fr}
  .subject-result-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .subject-result-score{font-size:20px}
  .result-title{font-size:14px}
  .leaderboard-wrap{display:none}
  .leaderboard-card-list{display:flex}
  #page-messages.active { flex-direction: column; height: calc(100dvh - 178px); gap: 10px; }
  .msg-sidebar { width: 100%; height: 100%; flex-shrink: 0; }
  .msg-content { width: 100%; height: 100%; flex-shrink: 0; }
  #page-messages.active .msg-content { display: none; }
  #page-messages.active.thread-open .msg-sidebar { display: none; }
  #page-messages.active.thread-open .msg-content { display: flex; }
  .msg-back{display:inline-flex;align-items:center}
  .mobile-dock{display:flex}
}
.hamburger{
  display:none;background:none;border:none;cursor:pointer;
  color:var(--text2);padding:4px;border-radius:6px;
}
.overlay{
  display:none;position:fixed;inset:0;
  background:rgba(0,0,0,0.5);z-index:99;
}

/* MOBILE DOCK */
.mobile-dock{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  height:64px;
  padding:8px max(10px, env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left));
  background:rgba(22,27,37,0.95);
  border-top:1px solid var(--border);
  backdrop-filter:blur(10px);
  z-index:120;
  gap:6px;
}
.dock-btn{
  flex:1;
  border:none;
  border-radius:10px;
  background:transparent;
  color:var(--text3);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:10px;
  font-weight:600;
}
.dock-btn svg{width:16px;height:16px}
.dock-btn.active{background:var(--accent-glow);color:var(--accent)}

/* EMPTY STATE */
.empty{padding:40px 0;text-align:center;color:var(--text3);font-size:14px}