/* =============================================
   EXAM PORTAL - Global Stylesheet
   ============================================= */

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

:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #e0e7ff;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #d97706;
    --bg: #f0f2f5;
    --white: #ffffff;
    --card: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --border: #e2e8f0;
    --radius: 10px;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

a { text-decoration: none; color: var(--primary); }
a:hover { color: var(--primary-dark); }

/* ---- Navbar ---- */
.navbar {
    background: var(--primary);
    color: white;
    padding: 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    box-shadow: 0 2px 8px rgba(79,70,229,0.3);
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar .brand { font-size: 1.4rem; font-weight: 700; color: white; letter-spacing: 1px; }
.navbar .brand span { color: #a5b4fc; }
.navbar nav a { color: rgba(255,255,255,0.85); margin-left: 20px; font-size: 0.9rem; transition: color 0.2s; }
.navbar nav a:hover { color: white; }
.navbar nav a.btn-nav { background: rgba(255,255,255,0.2); padding: 6px 14px; border-radius: 20px; }
.navbar nav a.btn-nav:hover { background: rgba(255,255,255,0.35); }

/* ---- Container ---- */
.container { max-width: 1100px; margin: 0 auto; padding: 30px 20px; }
.container-sm { max-width: 500px; margin: 60px auto; padding: 0 20px; }

/* ---- Cards ---- */
.card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px;
    margin-bottom: 20px;
}
.card-header { border-bottom: 1px solid var(--border); padding-bottom: 15px; margin-bottom: 20px; }
.card-header h2 { font-size: 1.2rem; color: var(--text); }

/* ---- Auth Forms ---- */
.auth-card {
    background: white;
    border-radius: 14px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.1);
    padding: 40px;
}
.auth-card h2 { text-align: center; font-size: 1.6rem; color: var(--primary); margin-bottom: 6px; }
.auth-card .subtitle { text-align: center; color: var(--muted); font-size: 0.9rem; margin-bottom: 28px; }
.auth-logo { text-align: center; font-size: 2.5rem; margin-bottom: 10px; }

/* ---- Form Elements ---- */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--text);
    transition: border-color 0.2s, box-shadow 0.2s;
    background: #fafafa;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
    background: white;
}
.form-group textarea { resize: vertical; min-height: 80px; }

/* ---- Buttons ---- */
.btn { display: inline-block; padding: 10px 22px; border-radius: 8px; border: none; cursor: pointer; font-size: 0.95rem; font-weight: 600; transition: all 0.2s; text-align: center; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); color: white; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(79,70,229,0.3); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #15803d; color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #b91c1c; color: white; }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: white; }
.btn-block { display: block; width: 100%; }
.btn-sm { padding: 6px 14px; font-size: 0.82rem; }
.btn-white { background: white; color: var(--primary); }
.btn-white:hover { background: #f1f5f9; color: var(--primary-dark); }

/* ---- Alerts ---- */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 0.9rem; font-weight: 500; }
.alert-success { background: #dcfce7; color: #16a34a; border: 1px solid #bbf7d0; }
.alert-danger  { background: #fee2e2; color: #dc2626; border: 1px solid #fecaca; }
.alert-warning { background: #fef3c7; color: #d97706; border: 1px solid #fde68a; }
.alert-info    { background: var(--primary-light); color: var(--primary-dark); border: 1px solid #c7d2fe; }

/* ---- Tables ---- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table th { background: #f8fafc; padding: 12px 16px; text-align: left; font-weight: 600; color: var(--muted); border-bottom: 2px solid var(--border); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; }
table td { padding: 12px 16px; border-bottom: 1px solid var(--border); color: var(--text); }
table tr:last-child td { border-bottom: none; }
table tr:hover td { background: #f8fafc; }

/* ---- Stats Grid ---- */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; margin-bottom: 30px; }
.stat-card { background: white; border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); border-left: 4px solid var(--primary); }
.stat-card.green  { border-color: var(--success); }
.stat-card.orange { border-color: var(--warning); }
.stat-card .stat-num { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-card.green  .stat-num { color: var(--success); }
.stat-card.orange .stat-num { color: var(--warning); }
.stat-card .stat-label { font-size: 0.8rem; color: var(--muted); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.5px; }

/* ---- Exam Cards Grid ---- */
.exam-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.exam-card { background: white; border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; border-top: 4px solid var(--primary); transition: transform 0.2s, box-shadow 0.2s; }
.exam-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.exam-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.exam-card p  { color: var(--muted); font-size: 0.88rem; margin-bottom: 14px; }
.exam-meta { display: flex; gap: 14px; margin-bottom: 16px; }
.exam-meta span { font-size: 0.8rem; color: var(--muted); display: flex; align-items: center; gap: 4px; }

/* ---- Badges ---- */
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-success { background: #dcfce7; color: var(--success); }
.badge-danger  { background: #fee2e2; color: var(--danger); }
.badge-warning { background: #fef3c7; color: var(--warning); }

/* ---- Exam Timer ---- */
#timer-box {
    position: fixed;
    top: 70px; right: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
    padding: 16px 22px;
    text-align: center;
    z-index: 99;
    border-top: 4px solid var(--primary);
    min-width: 130px;
}
#timer-box .timer-label { font-size: 0.75rem; color: var(--muted); margin-bottom: 4px; }
#timer-display { font-size: 1.8rem; font-weight: 700; color: var(--primary); font-family: monospace; }
#timer-display.danger { color: var(--danger); animation: pulse 1s infinite; }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ---- Question Card ---- */
.question-card { background: white; border-radius: var(--radius); box-shadow: var(--shadow); padding: 26px; margin-bottom: 20px; }
.question-num { font-size: 0.78rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 10px; }
.question-text { font-size: 1.05rem; font-weight: 600; color: var(--text); margin-bottom: 18px; line-height: 1.5; }
.options-list { list-style: none; }
.options-list li { margin-bottom: 10px; }
.options-list label { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border: 2px solid var(--border); border-radius: 8px; cursor: pointer; transition: all 0.15s; font-size: 0.95rem; }
.options-list label:hover { border-color: var(--primary); background: var(--primary-light); }
.options-list input[type="radio"]:checked + label,
.options-list li:has(input:checked) label { border-color: var(--primary); background: var(--primary-light); font-weight: 600; }
.options-list input[type="radio"] { display: none; }

/* ---- Result Page ---- */
.result-circle { width: 130px; height: 130px; border-radius: 50%; border: 8px solid var(--primary); display: flex; flex-direction: column; align-items: center; justify-content: center; margin: 0 auto 20px; }
.result-circle .score-num { font-size: 2.2rem; font-weight: 800; color: var(--primary); }
.result-circle .score-total { font-size: 0.85rem; color: var(--muted); }
.result-pass { border-color: var(--success); }
.result-pass .score-num { color: var(--success); }
.result-fail { border-color: var(--danger); }
.result-fail .score-num { color: var(--danger); }

/* ---- Page Header ---- */
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.page-header h1 { font-size: 1.5rem; color: var(--text); }
.page-header p  { color: var(--muted); font-size: 0.9rem; margin-top: 4px; }

/* ---- Hero Section ---- */
.hero { background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%); color: white; padding: 80px 20px; text-align: center; }
.hero h1 { font-size: 2.8rem; font-weight: 800; margin-bottom: 16px; }
.hero p  { font-size: 1.1rem; opacity: 0.9; margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-btns .btn { padding: 13px 30px; font-size: 1rem; }

/* ---- Features Section ---- */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; padding: 60px 20px; max-width: 1000px; margin: 0 auto; }
.feature-item { text-align: center; }
.feature-icon { font-size: 2.5rem; margin-bottom: 14px; }
.feature-item h3 { font-size: 1rem; margin-bottom: 8px; }
.feature-item p  { color: var(--muted); font-size: 0.88rem; }

/* ---- Footer ---- */
.footer { text-align: center; padding: 20px; color: var(--muted); font-size: 0.82rem; border-top: 1px solid var(--border); margin-top: 40px; }

/* ---- Responsive ---- */
@media (max-width: 600px) {
    .hero h1 { font-size: 1.8rem; }
    .navbar { padding: 0 15px; }
    .container { padding: 20px 15px; }
    #timer-box { position: relative; top: 0; right: 0; margin-bottom: 20px; width: 100%; }
}

/* ---- Admin Sidebar Layout ---- */
.admin-layout { display: flex; min-height: calc(100vh - 60px); }
.sidebar { width: 230px; background: white; box-shadow: 2px 0 8px rgba(0,0,0,0.05); padding: 24px 0; flex-shrink: 0; }
.sidebar a { display: flex; align-items: center; gap: 10px; padding: 11px 24px; color: var(--muted); font-size: 0.9rem; font-weight: 500; transition: all 0.15s; border-left: 3px solid transparent; }
.sidebar a:hover,
.sidebar a.active { color: var(--primary); background: var(--primary-light); border-left-color: var(--primary); }
.sidebar .menu-title { padding: 6px 24px 10px; font-size: 0.72rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.8px; font-weight: 600; margin-top: 10px; }
.admin-main { flex: 1; padding: 30px; overflow: auto; }