:root {
    --bg: #f6f8fc;
    --bg-accent: #eef2f8;
    --surface: rgba(255, 255, 255, 0.9);
    --surface-strong: #ffffff;
    --border: rgba(15, 23, 42, 0.08);
    --text: #1d3656;
    --muted: #62748b;
    --primary: #1d3656;
    --primary-deep: #13263f;
    --secondary: #f5871f;
    --warning: #f5871f;
    --danger: #e63946;
    --success: #198754;
    --shadow-lg: 0 24px 70px rgba(29, 54, 86, 0.12);
    --shadow-md: 0 14px 34px rgba(29, 54, 86, 0.08);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
}

html, body {
    min-height: 100%;
}

body {
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(29, 54, 86, 0.12), transparent 28%),
        radial-gradient(circle at top right, rgba(245, 135, 31, 0.14), transparent 24%),
        linear-gradient(180deg, #f2f5fa 0%, #fbfcfe 48%, #eef2f7 100%);
    font-family: "Segoe UI", "Trebuchet MS", Tahoma, sans-serif;
}

a {
    text-decoration: none;
}

.site-shell {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-shell::before,
.site-shell::after {
    content: "";
    position: fixed;
    inset: auto;
    width: 320px;
    height: 320px;
    border-radius: 999px;
    filter: blur(22px);
    z-index: -1;
    opacity: 0.65;
}

.site-shell::before {
    top: 90px;
    left: -120px;
    background: rgba(29, 54, 86, 0.15);
}

.site-shell::after {
    bottom: 40px;
    right: -120px;
    background: rgba(245, 135, 31, 0.14);
}

main {
    flex: 1 0 auto;
    display: flex;
    flex-direction: column;
}

main > .container {
    flex: 1 0 auto;
}

.site-nav {
    backdrop-filter: blur(14px);
    background: rgba(29, 54, 86, 0.92);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-lockup {
    min-width: 0;
}

.brand-wordmark {
    display: block;
    width: auto;
    max-width: 210px;
    height: 54px;
    object-fit: contain;
    object-position: left center;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.97);
    padding: 4px 8px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
    flex-shrink: 0;
}

.brand-text {
    line-height: 1.05;
    min-width: 0;
}

.brand-title {
    color: #fff;
    font-size: 1rem;
    font-weight: 800;
}

.brand-subtitle {
    color: rgba(255, 255, 255, 0.68);
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.workspace-pill {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 999px;
    color: var(--primary);
    background: rgba(245, 135, 31, 0.12);
    border: 1px solid rgba(245, 135, 31, 0.32);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.workspace-link {
    text-decoration: none;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.32);
    transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.workspace-link:hover {
    color: #fff;
    background: rgba(245, 135, 31, 0.26);
    border-color: rgba(245, 135, 31, 0.48);
    transform: translateY(-1px);
}

.topbar-nav {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

.student-topbar {
    background: linear-gradient(180deg, rgba(255,255,255,0.76) 0%, rgba(248,241,233,0.92) 100%);
}

.student-identity {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(245, 135, 31, 0.09);
    border: 1px solid rgba(245, 135, 31, 0.18);
}

.student-identity-label {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--secondary);
}

.student-identity-name {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text);
}

.hero-card,
.exam-card,
.admin-card,
.glass-card {
    border: 1px solid rgba(255, 255, 255, 0.65);
    border-radius: var(--radius-xl);
    background: linear-gradient(180deg, rgba(255,255,255,0.94) 0%, rgba(255,255,255,0.88) 100%);
    box-shadow: var(--shadow-lg);
}

.soft-panel {
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(255,255,255,0.95) 0%, rgba(244,248,255,0.92) 100%);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.hero-split {
    position: relative;
    overflow: hidden;
}

.hero-split::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(120deg, rgba(29, 54, 86, 0.1), transparent 42%),
        linear-gradient(300deg, rgba(245, 135, 31, 0.1), transparent 34%);
    pointer-events: none;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary);
    background: rgba(245, 135, 31, 0.12);
}

.display-title {
    font-size: clamp(2rem, 3vw, 3.35rem);
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.lead-copy {
    color: var(--muted);
    font-size: 1.05rem;
    max-width: 58ch;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 14px;
}

.feature-chip,
.metric-tile {
    padding: 16px 18px;
    border-radius: 18px;
    background: var(--surface-strong);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.category-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 100%;
    padding: 18px;
    border-radius: 18px;
    background: linear-gradient(180deg, rgba(255,255,255,0.96) 0%, rgba(247,249,253,0.92) 100%);
    border: 1px solid rgba(29, 54, 86, 0.1);
    box-shadow: var(--shadow-md);
    color: var(--text);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 34px rgba(29, 54, 86, 0.12);
    border-color: rgba(245, 135, 31, 0.35);
    color: var(--text);
}

.category-card-active {
    border-color: rgba(245, 135, 31, 0.52);
    background: linear-gradient(180deg, rgba(255,248,240,0.98) 0%, rgba(255,255,255,0.95) 100%);
}

.category-card-label {
    font-size: 1rem;
    font-weight: 800;
}

.category-card-copy {
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.45;
}

.feature-chip strong,
.metric-tile strong {
    display: block;
    font-size: 1rem;
}

.feature-chip span,
.metric-tile span {
    display: block;
    color: var(--muted);
    font-size: 0.86rem;
    margin-top: 4px;
}

.metric-tile .metric-value {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
    margin-top: 8px;
}

.big-action {
    min-height: 56px;
    font-size: 1.02rem;
    font-weight: 700;
    border-radius: 16px;
}

.btn {
    border-radius: 14px;
    font-weight: 700;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #29466d 100%);
    border-color: transparent;
    box-shadow: 0 10px 24px rgba(29, 54, 86, 0.24);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: rgba(29, 54, 86, 0.28);
}

.btn-outline-secondary {
    color: #7a4a17;
    border-color: rgba(245, 135, 31, 0.28);
}

.btn-success {
    background: linear-gradient(135deg, #f5871f 0%, #e16f08 100%);
    border-color: transparent;
}

.btn-warning {
    color: #1e1e1e;
    background: linear-gradient(135deg, #ffd39d 0%, #f7ad59 100%);
    border-color: rgba(245, 135, 31, 0.2);
}

.palette-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
    gap: 10px;
}

.palette-btn {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    border: none;
    font-weight: 800;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.25);
}

.palette-current {
    background-color: var(--danger);
    color: #fff;
}

.palette-answered {
    background-color: var(--success);
    color: #fff;
}

.palette-review {
    background-color: #f0ad4e;
    color: #fff;
}

.palette-unanswered {
    background-color: #9aa7bd;
    color: #fff;
}

.option-label {
    border: 2px solid #dce5f2;
    border-radius: 16px;
    padding: 14px 16px;
    margin-bottom: 12px;
    display: block;
    cursor: pointer;
    transition: all 0.2s ease;
    background: #fff;
}

.option-label:hover,
.option-label.selected {
    border-color: var(--primary);
    background: #f8f3ec;
    box-shadow: 0 10px 18px rgba(29, 54, 86, 0.08);
}

.timer-box {
    min-width: 150px;
    background: linear-gradient(135deg, #1d3656 0%, #355680 100%);
    color: #fff;
    border-radius: 18px;
    padding: 13px 20px;
    font-weight: 800;
    text-align: center;
    box-shadow: 0 14px 26px rgba(29, 54, 86, 0.24);
}

.status-pill {
    border-radius: 999px;
    padding: 5px 11px;
    font-size: 0.82rem;
    font-weight: 800;
}

.status-correct {
    background: #d1e7dd;
    color: #0f5132;
}

.status-wrong {
    background: #f8d7da;
    color: #842029;
}

.status-pending {
    background: #e2e8f0;
    color: #435066;
}

.status-review {
    background: #fff3cd;
    color: #8a5d00;
}

.review-item {
    border: 1px solid #e6ebf2;
    border-radius: 16px;
    padding: 14px 16px;
    background: #fff;
}

.search-suggest-wrap {
    position: relative;
}

.search-suggestions {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    z-index: 20;
    display: none;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 18px 34px rgba(17, 33, 66, 0.12);
}

.search-suggestions.show {
    display: block;
}

.section-block {
    border: 1px solid #dbe7ff;
    border-radius: 1.25rem;
    background: #fff;
    margin-bottom: 1.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.section-head {
    background: linear-gradient(90deg, #0c58ff, #13b5a7);
    color: #fff;
    padding: 1rem 1.25rem;
}

.landing-stat {
    padding: 20px;
    border-radius: 20px;
    background: linear-gradient(180deg, #fff 0%, #f6f9ff 100%);
    border: 1px solid var(--border);
}

.landing-stat .value {
    font-size: 2.1rem;
    font-weight: 800;
    line-height: 1;
}

.site-footer {
    color: var(--muted);
    font-size: 0.92rem;
    margin-top: auto;
}

@media (max-width: 991px) {
    .sticky-summary {
        position: static !important;
    }

    .brand-wordmark {
        max-width: 150px;
        height: 44px;
    }

    .brand-subtitle {
        display: none;
    }
}