/* ===== Variables ===== */
:root {
  --red: #E31837; --dark: #1A1A2E; --navy: #16213E; --blue: #0F3460;
  --blue2: #1565C0; --success: #27AE60; --warning: #F39C12; --danger: #E74C3C;
  --g100: #F8F9FA; --g200: #E9ECEF; --g300: #DEE2E6; --g400: #ADB5BD;
  --g600: #6C757D; --g800: #343A40; --white: #fff;
  --font: 'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  --sh1: 0 2px 8px rgba(0,0,0,.08); --sh2: 0 4px 20px rgba(0,0,0,.13);
  --sh3: 0 8px 40px rgba(0,0,0,.18); --r: 12px; --rs: 8px; --tr: .22s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--g100);color:var(--g800);min-height:100vh;overflow-x:hidden}
button{font-family:var(--font);cursor:pointer}
input,select,textarea{font-family:var(--font)}
a{color:inherit;text-decoration:none}

/* ===== Page System ===== */
.page{display:none}
.page.active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.page-anim{animation:fadeUp .28s ease}

/* Login page: always on top when active */
#pageLogin.active{
  position:relative;
  z-index:1000;
  background:linear-gradient(160deg,var(--dark),var(--blue));
  min-height:100vh;
  display:flex!important;
  align-items:center;
  justify-content:center;
  padding:24px;
}

/* ===== TOP HEADER ===== */
.top-header{background:linear-gradient(135deg,var(--dark) 0%,var(--navy) 50%,var(--blue) 100%);color:#fff;position:sticky;top:0;z-index:200;box-shadow:var(--sh2)}
.header-inner{max-width:1240px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo-wrap{display:flex;align-items:center;gap:12px}
.logo-badge{background:var(--red);color:#fff;font-weight:800;font-size:17px;padding:5px 12px;border-radius:6px;letter-spacing:1px}
.logo-text h1{font-size:17px;font-weight:700}
.logo-text p{font-size:11px;opacity:.65;margin-top:1px}
.header-right{display:flex;align-items:center;gap:16px}
.header-user{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.85)}
.user-avatar{width:32px;height:32px;border-radius:50%;background:var(--red);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;color:#fff;flex-shrink:0}
.header-progress{display:flex;align-items:center;gap:8px;font-size:12px;color:rgba(255,255,255,.75)}
.prog-bar{width:120px;height:5px;background:rgba(255,255,255,.2);border-radius:3px;overflow:hidden}
.prog-fill{height:100%;background:linear-gradient(90deg,#4CAF50,#81C784);border-radius:3px;transition:width .5s}
.logout-btn{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);color:rgba(255,255,255,.85);padding:5px 14px;border-radius:20px;font-size:12px;font-weight:600;transition:all var(--tr)}
.logout-btn:hover{background:rgba(255,255,255,.22);color:#fff}

/* ===== LOGIN PAGE ===== */
.login-card{background:#fff;border-radius:20px;padding:48px 44px;width:100%;max-width:420px;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.login-logo{text-align:center;margin-bottom:32px}
.login-logo .logo-badge{display:inline-block;font-size:22px;padding:8px 20px;margin-bottom:12px}
.login-logo h2{font-size:20px;font-weight:700;color:var(--dark);margin-bottom:4px}
.login-logo p{font-size:13px;color:var(--g600)}
.form-group{margin-bottom:18px}
.form-label{display:block;font-size:13px;font-weight:600;color:var(--g800);margin-bottom:6px}
.form-input{width:100%;padding:11px 14px;border:2px solid var(--g200);border-radius:var(--rs);font-size:14px;color:var(--g800);transition:border var(--tr);outline:none;background:#fff}
.form-input:focus{border-color:var(--blue)}
.form-input.error{border-color:var(--danger)}
.login-btn{width:100%;padding:13px;background:linear-gradient(135deg,var(--red),#c0392b);color:#fff;font-size:15px;font-weight:700;border:none;border-radius:50px;margin-top:8px;transition:all var(--tr);box-shadow:0 4px 14px rgba(227,24,55,.35)}
.login-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(227,24,55,.5)}
.login-error{color:var(--danger);font-size:13px;text-align:center;margin-top:10px;display:none}
.login-error.show{display:block}
.login-hint{font-size:12px;color:var(--g400);text-align:center;margin-top:20px}
.role-tag{display:inline-block;font-size:10px;font-weight:700;padding:2px 8px;border-radius:10px;text-transform:uppercase;letter-spacing:.5px}
.role-admin{background:#FCE4EC;color:#C62828}
.role-manager{background:#E3F2FD;color:#1565C0}
.role-user{background:#E8F5E9;color:#2E7D32}

/* ===== CHANGE PASSWORD MODAL ===== */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:500;align-items:center;justify-content:center;padding:24px}
.modal-overlay.show{display:flex}
.modal-box{background:#fff;border-radius:var(--r);padding:36px;width:100%;max-width:440px;box-shadow:var(--sh3);animation:fadeUp .25s ease}
.modal-title{font-size:18px;font-weight:700;color:var(--dark);margin-bottom:6px}
.modal-desc{font-size:13px;color:var(--g600);margin-bottom:24px;line-height:1.6}
.modal-actions{display:flex;gap:10px;margin-top:24px;justify-content:flex-end}
.btn{padding:10px 24px;border:none;border-radius:50px;font-size:13px;font-weight:600;transition:all var(--tr)}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--dark)}
.btn-danger{background:var(--red);color:#fff}
.btn-danger:hover{background:#c0392b}
.btn-ghost{background:var(--g200);color:var(--g600)}
.btn-ghost:hover{background:var(--g300)}
.btn-success{background:var(--success);color:#fff}
.btn-success:hover{background:#219a52}
.btn-sm{padding:6px 16px;font-size:12px}
.btn-xs{padding:4px 12px;font-size:11px}

/* ===== DASHBOARD ===== */
.dash-hero{background:linear-gradient(160deg,var(--navy),var(--blue));color:#fff;padding:52px 24px 70px;text-align:center;position:relative;overflow:hidden}
.dash-hero::before{content:'';position:absolute;top:-40%;left:-10%;width:50%;height:180%;background:radial-gradient(circle,rgba(227,24,55,.15) 0%,transparent 60%);pointer-events:none}
.hero-pill{display:inline-block;background:rgba(227,24,55,.2);border:1px solid rgba(227,24,55,.4);color:#ff8fa3;font-size:11px;font-weight:600;letter-spacing:1.5px;padding:4px 14px;border-radius:20px;text-transform:uppercase;margin-bottom:18px}
.hero-title{font-size:34px;font-weight:800;line-height:1.2;margin-bottom:10px}
.hero-title span{color:var(--red)}
.hero-sub{font-size:15px;opacity:.72;max-width:520px;margin:0 auto 28px;line-height:1.7}
.hero-stats{display:flex;justify-content:center;gap:36px;flex-wrap:wrap}
.h-stat-num{font-size:26px;font-weight:800;display:block}
.h-stat-lbl{font-size:11px;opacity:.6;margin-top:2px}

/* ===== COURSE CARDS ===== */
.section-wrap{max-width:1200px;margin:-28px auto 0;padding:0 24px 60px}
.sec-title{font-size:20px;font-weight:700;color:var(--g800);margin-bottom:20px;display:flex;align-items:center;gap:10px}
.sec-title::before{content:'';width:4px;height:20px;background:var(--red);border-radius:2px}
.courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.course-card{background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:var(--sh1);cursor:pointer;border:2px solid transparent;transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr)}
.course-card:hover{transform:translateY(-4px);box-shadow:var(--sh3);border-color:var(--g200)}
.course-card.passed{border-color:#C8E6C9}
.card-top{padding:18px 18px 14px}
.c-icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:10px}
.c-mod{font-size:10px;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:5px}
.c-title{font-size:15px;font-weight:700;color:var(--g800);line-height:1.4;margin-bottom:6px}
.c-desc{font-size:12px;color:var(--g600);line-height:1.55}
.prog-wrap{height:4px;background:var(--g200);border-radius:2px;margin-top:10px;overflow:hidden}
.card-bot{padding:10px 18px 14px;border-top:1px solid var(--g200);display:flex;justify-content:space-between;align-items:center}
.c-meta{display:flex;gap:12px;font-size:11px;color:var(--g600)}
.status-badge{font-size:10px;font-weight:700;padding:3px 9px;border-radius:20px}
.s-none{background:var(--g100);color:var(--g600)}
.s-pass{background:#D4EDDA;color:#155724}
.s-fail{background:#F8D7DA;color:#721C24}

/* Theme colors */
.t1 .c-icon{background:#FFEBEE;color:#C62828} .t1 .c-mod{color:#C62828}
.t2 .c-icon{background:#E3F2FD;color:#1565C0} .t2 .c-mod{color:#1565C0}
.t3 .c-icon{background:#E8F5E9;color:#2E7D32} .t3 .c-mod{color:#2E7D32}
.t4 .c-icon{background:#F3E5F5;color:#6A1B9A} .t4 .c-mod{color:#6A1B9A}
.t5 .c-icon{background:#FFF3E0;color:#E65100} .t5 .c-mod{color:#E65100}
.t6 .c-icon{background:#E0F2F1;color:#00695C} .t6 .c-mod{color:#00695C}
.t7 .c-icon{background:#FFF8E1;color:#F57F17} .t7 .c-mod{color:#F57F17}
.t8 .c-icon{background:#ECEFF1;color:#37474F} .t8 .c-mod{color:#37474F}
.t9 .c-icon{background:#E8EAF6;color:#283593} .t9 .c-mod{color:#283593}
.t10 .c-icon{background:#E8F5E9;color:#1B5E20} .t10 .c-mod{color:#1B5E20}

/* ===== COURSE DETAIL ===== */
.course-hdr{background:linear-gradient(135deg,var(--dark),var(--blue));color:#fff;padding:36px 24px 0}
.course-hdr-inner{max-width:900px;margin:0 auto}
.back-btn{display:inline-flex;align-items:center;gap:6px;color:rgba(255,255,255,.65);font-size:12px;background:none;border:none;margin-bottom:18px;transition:color var(--tr)}
.back-btn:hover{color:#fff}
.course-hdr-title{font-size:26px;font-weight:800;margin-bottom:8px}
.course-hdr-sub{opacity:.72;font-size:14px;line-height:1.6;margin-bottom:0}
.tab-row{max-width:900px;margin:20px auto 0;display:flex;gap:3px;padding:0 0}
.tab-btn{padding:9px 22px;border:none;border-radius:8px 8px 0 0;font-size:13px;font-weight:600;background:rgba(255,255,255,.15);color:rgba(255,255,255,.65);cursor:pointer;transition:all var(--tr);position:relative;top:1px}
.tab-btn.active{background:#fff;color:var(--blue)}
.tab-btn:hover:not(.active){background:rgba(255,255,255,.25);color:#fff}
.course-body{max-width:900px;margin:0 auto;padding:0 0 60px}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* ===== LESSON CONTENT ===== */
.lesson-block{background:#fff;border-radius:var(--r);padding:28px 32px;margin-top:18px;box-shadow:var(--sh1)}
.lesson-block h2{font-size:19px;font-weight:700;color:var(--blue);margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--g200)}
.lesson-block h3{font-size:15px;font-weight:700;color:var(--g800);margin:18px 0 8px}
.lesson-block p{font-size:13px;line-height:1.8;color:var(--g600);margin-bottom:10px}
.lesson-block ul,.lesson-block ol{padding-left:20px;margin-bottom:12px}
.lesson-block li{font-size:13px;line-height:1.8;color:var(--g600);margin-bottom:4px}
.lesson-block li strong{color:var(--g800)}
.info-box{border-radius:var(--rs);padding:14px 18px;margin:14px 0;display:flex;gap:10px;align-items:flex-start}
.ib-tip{background:#E3F2FD;border-left:4px solid #1976D2}
.ib-warn{background:#FFF8E1;border-left:4px solid #F9A825}
.ib-imp{background:#FCE4EC;border-left:4px solid #E91E63}
.ib-ok{background:#E8F5E9;border-left:4px solid #388E3C}
.ib-icon{font-size:16px;flex-shrink:0;margin-top:2px}
.ib-text{font-size:12px;line-height:1.7;color:#444}
.ib-text strong{display:block;margin-bottom:3px;color:#333}
.step-list{list-style:none!important;padding:0!important}
.step-item{display:flex;gap:14px;align-items:flex-start;margin-bottom:16px;padding:14px;background:var(--g100);border-radius:var(--rs)}
.step-num{width:28px;height:28px;border-radius:50%;background:var(--blue);color:#fff;font-weight:700;font-size:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.step-content h4{font-size:13px;font-weight:700;color:var(--g800);margin-bottom:4px}
.step-content p{font-size:12px;color:var(--g600);line-height:1.6;margin:0}
.tt{width:100%;border-collapse:collapse;font-size:12px;margin:12px 0}
.tt th{background:var(--blue);color:#fff;padding:8px 12px;text-align:left;font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.4px}
.tt td{padding:8px 12px;border-bottom:1px solid var(--g200);color:#555;vertical-align:top}
.tt tr:hover td{background:var(--g100)}
.tt td:first-child{font-weight:600;color:var(--g800)}
.code-inline{background:#EEF4FF;color:#1565C0;font-family:monospace;font-size:13px;padding:3px 8px;border-radius:4px;font-weight:600}

/* ===== EXAM PAGE ===== */
.exam-wrap{max-width:780px;margin:0 auto;padding:20px 20px 60px}
.exam-hdr{background:#fff;border-radius:var(--r);padding:14px 20px;margin-bottom:18px;box-shadow:var(--sh1);display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.exam-name{font-size:14px;font-weight:700;color:var(--g800)}
.exam-info{display:flex;align-items:center;gap:14px}
.q-dots{display:flex;gap:5px;flex-wrap:wrap}
.q-dot{width:9px;height:9px;border-radius:50%;background:var(--g200);transition:background var(--tr)}
.q-dot.cur{background:var(--blue)}
.q-dot.ok{background:var(--success)}
.q-dot.ng{background:var(--danger)}
.q-dot.to{background:var(--warning)}
.timer-ring{width:50px;height:50px;position:relative}
.timer-ring svg{transform:rotate(-90deg);width:50px;height:50px}
.tr-bg{fill:none;stroke:var(--g200);stroke-width:4}
.tr-fill{fill:none;stroke:var(--blue);stroke-width:4;stroke-linecap:round;stroke-dasharray:138;stroke-dashoffset:0;transition:stroke-dashoffset 1s linear,stroke .3s}
.timer-txt{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:13px;font-weight:700;color:var(--g800)}
.q-card{background:#fff;border-radius:var(--r);padding:28px;box-shadow:var(--sh1);margin-bottom:16px}
.q-num{font-size:11px;font-weight:700;color:var(--g400);text-transform:uppercase;letter-spacing:1px;margin-bottom:10px}
.q-text{font-size:16px;font-weight:600;color:var(--g800);line-height:1.6;margin-bottom:24px}
.q-opts{display:flex;flex-direction:column;gap:10px}
.q-opt{display:flex;align-items:flex-start;gap:12px;padding:12px 16px;border:2px solid var(--g200);border-radius:var(--rs);cursor:pointer;font-size:13px;color:#555;line-height:1.5;background:#fff;text-align:left;width:100%;transition:all var(--tr)}
.q-opt:hover:not(.dis){border-color:var(--blue);background:#EEF4FF;color:var(--blue)}
.q-opt.sel{border-color:var(--blue);background:#EEF4FF;color:var(--blue)}
.q-opt.cor{border-color:var(--success);background:#E8F5E9;color:#2E7D32}
.q-opt.err{border-color:var(--danger);background:#FFEBEE;color:#C62828}
.q-opt.rev{border-color:var(--success);background:#E8F5E9;color:#2E7D32}
.q-opt.dis{cursor:not-allowed}
.opt-letter{width:26px;height:26px;border-radius:50%;background:var(--g100);color:var(--g600);font-weight:700;font-size:11px;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all var(--tr)}
.q-opt.sel .opt-letter,.q-opt.cor .opt-letter,.q-opt.rev .opt-letter{background:var(--blue);color:#fff}
.q-opt.cor .opt-letter,.q-opt.rev .opt-letter{background:var(--success)}
.q-opt.err .opt-letter{background:var(--danger);color:#fff}
.q-explain{margin-top:14px;padding:12px 15px;background:#E8F0FE;border-radius:var(--rs);font-size:12px;color:#1A3A6B;line-height:1.7;display:none}
.q-explain.show{display:block}
.exam-nav{display:flex;justify-content:space-between;align-items:center}

/* ===== RESULT PAGE ===== */
.result-wrap{max-width:680px;margin:36px auto;padding:0 20px}
.result-card{background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:var(--sh2)}
.result-hero{padding:44px 36px 36px;text-align:center}
.result-icon{width:90px;height:90px;border-radius:50%;margin:0 auto 18px;display:flex;align-items:center;justify-content:center;font-size:40px}
.ri-pass{background:#E8F5E9}
.ri-fail{background:#FFEBEE}
.result-verdict{font-size:26px;font-weight:800;margin-bottom:6px}
.rv-pass{color:var(--success)}
.rv-fail{color:var(--danger)}
.result-score{font-size:52px;font-weight:900;line-height:1;margin:14px 0 6px}
.rs-pass{color:var(--success)}
.rs-fail{color:var(--danger)}
.result-sub{font-size:13px;color:var(--g600)}
.result-msg{font-size:14px;color:var(--g600);margin-top:14px;line-height:1.7}
.result-stats{display:flex;border-top:1px solid var(--g200)}
.r-stat{flex:1;padding:18px;text-align:center;border-right:1px solid var(--g200)}
.r-stat:last-child{border:none}
.r-stat-val{font-size:22px;font-weight:800;color:var(--g800)}
.r-stat-lbl{font-size:11px;color:var(--g400);margin-top:3px}
.result-review{padding:20px 36px 28px;border-top:1px solid var(--g200)}
.result-review h3{font-size:14px;font-weight:700;margin-bottom:14px}
.rev-item{padding:12px 14px;border-radius:var(--rs);margin-bottom:8px;display:flex;gap:10px;align-items:flex-start}
.rev-ok{background:#E8F5E9}
.rev-ng{background:#FFEBEE}
.rev-to{background:#FFF8E1}
.rev-icon{font-size:14px;flex-shrink:0;margin-top:1px}
.rev-text{font-size:12px;line-height:1.6}
.rev-text strong{color:var(--g800);display:block;margin-bottom:3px}
.rev-text span{color:var(--g600)}
.result-actions{padding:20px 36px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap;border-top:1px solid var(--g200)}

/* ===== MY PROFILE ===== */
.profile-wrap{max-width:960px;margin:0 auto;padding:24px}
.profile-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:0}
.pcard{background:#fff;border-radius:var(--r);padding:22px;box-shadow:var(--sh1)}
.pcard h3{font-size:15px;font-weight:700;color:var(--g800);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.score-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--g200);font-size:13px}
.score-row:last-child{border:none}
.score-name{color:var(--g800);font-weight:600}
.score-val{font-weight:700}
.sv-pass{color:var(--success)}
.sv-fail{color:var(--danger)}
.sv-none{color:var(--g400)}

/* ===== ADMIN / MANAGER PAGES ===== */
.admin-wrap{max-width:1200px;margin:0 auto;padding:24px}
.admin-tabs{display:flex;gap:4px;margin-bottom:22px;background:#fff;padding:6px;border-radius:var(--r);box-shadow:var(--sh1);overflow-x:auto}
.admin-tab{padding:9px 20px;border:none;border-radius:var(--rs);font-size:13px;font-weight:600;background:transparent;color:var(--g600);transition:all var(--tr);white-space:nowrap}
.admin-tab.active{background:var(--blue);color:#fff}
.admin-tab:hover:not(.active){background:var(--g100)}
.admin-panel{display:none}
.admin-panel.active{display:block}
.table-card{background:#fff;border-radius:var(--r);box-shadow:var(--sh1);overflow:hidden}
.table-card-hdr{padding:16px 22px;border-bottom:1px solid var(--g200);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.table-card-hdr h3{font-size:15px;font-weight:700;color:var(--g800)}
.search-input{padding:7px 12px;border:2px solid var(--g200);border-radius:var(--rs);font-size:13px;outline:none;transition:border var(--tr);width:220px}
.search-input:focus{border-color:var(--blue)}
.data-table{width:100%;border-collapse:collapse;font-size:13px}
.data-table th{background:var(--g100);color:var(--g600);padding:10px 16px;text-align:left;font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.4px;border-bottom:2px solid var(--g200)}
.data-table td{padding:10px 16px;border-bottom:1px solid var(--g200);color:var(--g700);vertical-align:middle}
.data-table tr:hover td{background:#FAFBFC}
.data-table td:first-child{font-weight:600;color:var(--g800)}
.empty-row td{text-align:center;color:var(--g400);padding:32px;font-style:italic}
.action-btns{display:flex;gap:6px;flex-wrap:wrap}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:22px}
.stat-card{background:#fff;border-radius:var(--r);padding:20px;box-shadow:var(--sh1);display:flex;align-items:center;gap:16px}
.stat-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.si-blue{background:#E3F2FD}
.si-green{background:#E8F5E9}
.si-red{background:#FFEBEE}
.si-orange{background:#FFF3E0}
.stat-num{font-size:28px;font-weight:800;color:var(--g800);line-height:1}
.stat-lbl{font-size:12px;color:var(--g400);margin-top:3px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-row.single{grid-template-columns:1fr}
.form-select{width:100%;padding:9px 12px;border:2px solid var(--g200);border-radius:var(--rs);font-size:13px;color:var(--g800);outline:none;transition:border var(--tr);background:#fff;appearance:none}
.form-select:focus{border-color:var(--blue)}
.upload-zone{border:2px dashed var(--g300);border-radius:var(--rs);padding:28px;text-align:center;cursor:pointer;transition:all var(--tr);background:#FAFBFC}
.upload-zone:hover,.upload-zone.dragover{border-color:var(--blue);background:#EEF4FF}
.upload-icon{font-size:36px;margin-bottom:8px}
.upload-text{font-size:13px;color:var(--g600);line-height:1.6}
.upload-text strong{color:var(--blue)}
.file-list{margin-top:12px;display:flex;flex-direction:column;gap:6px}
.file-item{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:var(--g100);border-radius:var(--rs);font-size:12px}
.file-item-name{display:flex;align-items:center;gap:6px;color:var(--g800);font-weight:600}
.progress-ring-sm{width:20px;height:20px;flex-shrink:0}
.dept-badge{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:20px;font-size:11px;font-weight:600;background:#E3F2FD;color:var(--blue2)}

/* ===== TIMEOUT OVERLAY ===== */
.to-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:999;align-items:center;justify-content:center}
.to-overlay.show{display:flex}
.to-box{background:#fff;border-radius:var(--r);padding:36px;text-align:center;max-width:360px;width:90%;box-shadow:var(--sh3);animation:fadeUp .25s ease}
.to-icon{font-size:48px;margin-bottom:14px}
.to-title{font-size:20px;font-weight:700;color:var(--danger);margin-bottom:6px}
.to-desc{font-size:13px;color:var(--g600);margin-bottom:22px;line-height:1.6}

/* ===== START EXAM PANEL ===== */
.start-exam-panel{text-align:center;padding:52px 32px}
.se-icon{font-size:52px;margin-bottom:18px}
.se-title{font-size:20px;font-weight:700;color:var(--g800);margin-bottom:10px}
.se-desc{font-size:14px;color:var(--g600);max-width:440px;margin:0 auto 28px;line-height:1.8}
.start-btn{display:inline-block;padding:13px 44px;background:linear-gradient(135deg,var(--red),#c0392b);color:#fff;font-size:15px;font-weight:700;border:none;border-radius:50px;transition:all var(--tr);box-shadow:0 4px 14px rgba(227,24,55,.35)}
.start-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(227,24,55,.5)}

/* ===== MATERIAL VIEWER ===== */
.mat-list{display:flex;flex-direction:column;gap:8px;margin-top:8px}
.mat-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:#fff;border-radius:var(--rs);box-shadow:var(--sh1);cursor:pointer;transition:all var(--tr)}
.mat-item:hover{background:var(--g100);transform:translateX(3px)}
.mat-icon{font-size:20px;flex-shrink:0}
.mat-info h4{font-size:13px;font-weight:700;color:var(--g800);margin-bottom:2px}
.mat-info p{font-size:11px;color:var(--g400)}
.mat-tag{margin-left:auto;align-self:center;font-size:10px;font-weight:700;padding:2px 8px;border-radius:20px;background:#E3F2FD;color:var(--blue2);white-space:nowrap;display:inline-flex;align-items:center}

/* ===== RESPONSIVE ===== */
@media(max-width:768px){
  .hero-title{font-size:24px} .courses-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr} .profile-grid{grid-template-columns:1fr}
  .header-progress{display:none} .result-stats{flex-wrap:wrap}
  .r-stat{min-width:50%} .result-review{padding:16px}
  .result-actions{flex-direction:column} .admin-wrap{padding:16px}
  .course-body{padding:0 16px 60px}
}