:root {
    --brand-900: #0f1d3a;
    --brand-800: #15306b;
    --brand-700: #1f4da3;
    --brand-500: #4f86ff;
    --brand-100: #edf4ff;
    --surface-strong: rgba(255, 255, 255, 0.96);
    --surface-muted: rgba(255, 255, 255, 0.78);
    --surface-border: rgba(122, 148, 198, 0.2);
    --text-strong: #162033;
    --text-muted: #5d6a7e;
    --success-500: #159f6c;
    --warning-500: #d9891b;
    --danger-500: #d64545;
    --shadow-soft: 0 18px 48px rgba(15, 29, 58, 0.12);
    --shadow-card: 0 20px 40px rgba(21, 48, 107, 0.12);
}

body {
    background:
        radial-gradient(circle at top left, rgba(79, 134, 255, 0.16), transparent 30%),
        radial-gradient(circle at top right, rgba(21, 159, 108, 0.12), transparent 26%),
        linear-gradient(180deg, #f5f8ff 0%, #eef3fb 48%, #f9fbff 100%);
    color: var(--text-strong);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
    background-size: 64px 64px;
    pointer-events: none;
    opacity: 0.3;
    z-index: -2;
}

header {
    background: rgba(255, 255, 255, 0.78) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.55);
    box-shadow: 0 12px 32px rgba(15, 29, 58, 0.08) !important;
}

.logo {
    letter-spacing: -0.03em;
}

.logo-icon {
    background: linear-gradient(145deg, var(--brand-800), var(--brand-500)) !important;
    box-shadow: 0 10px 24px rgba(21, 48, 107, 0.24);
}

.nav-links a,
.user-profile a {
    color: var(--text-muted) !important;
}

.nav-links a:hover,
.user-profile a:hover {
    color: var(--brand-800) !important;
}

.btn {
    border-radius: 14px !important;
    font-weight: 600 !important;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--brand-800), var(--brand-500)) !important;
    box-shadow: 0 14px 28px rgba(31, 77, 163, 0.2);
}

.btn-outline {
    border-color: rgba(21, 48, 107, 0.2) !important;
    color: var(--brand-800) !important;
    background: rgba(255, 255, 255, 0.78) !important;
}

.btn-outline:hover {
    background: var(--brand-800) !important;
    color: #fff !important;
}

.message,
.modal-content,
.question-container,
.results-section,
.attempt-section,
.admin-content,
.question-grid-container,
.timer-container,
.form-container,
.analytics-col,
.analytics-full,
.stat-card,
.quiz-card,
.data-table,
.question-item {
    box-shadow: var(--shadow-card) !important;
}

.hero {
    padding-top: 96px !important;
    padding-bottom: 96px !important;
}

.hero .container {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.9fr);
    gap: 36px;
    align-items: center;
}

.hero-content {
    max-width: none !important;
}

.hero h1 {
    font-size: clamp(3rem, 5vw, 4.75rem) !important;
    letter-spacing: -0.05em;
    color: var(--brand-900) !important;
}

.hero p {
    max-width: 62ch;
    font-size: 1.08rem !important;
    color: var(--text-muted) !important;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    margin-bottom: 18px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--surface-border);
    color: var(--brand-800);
    font-size: 0.86rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero-points {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 26px;
}

.hero-point {
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid var(--surface-border);
    border-radius: 18px;
    padding: 16px 18px;
}

.hero-point strong {
    display: block;
    margin-bottom: 6px;
    color: var(--brand-900);
}

.hero-point span {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.aircraft-icon {
    justify-self: end;
    align-self: center;
    font-size: clamp(8rem, 16vw, 14rem);
    color: rgba(21, 48, 107, 0.12);
    transform: rotate(-12deg);
}

.dashboard,
.admin-container,
.container > .results-section,
.container > .attempt-section {
    position: relative;
    z-index: 1;
}

.section-title h2,
.page-title,
.attempt-header h2,
.results-section h2 {
    color: var(--brand-900) !important;
    letter-spacing: -0.04em;
}

.category-filter,
.results-section,
.attempt-section,
.admin-header,
.admin-tabs,
.admin-content,
.question-grid-container,
.timer-container {
    border: 1px solid var(--surface-border);
}

.category-filter,
.results-section,
.attempt-section,
.admin-content,
.question-grid-container,
.timer-container,
.form-container,
.analytics-col,
.analytics-full {
    background: var(--surface-strong) !important;
}

.category-filter {
    padding: 18px 22px;
    margin-bottom: 26px;
    border-radius: 20px;
}

.form-control,
.form-group input,
.form-group textarea,
.form-group select,
.text-answer-container textarea {
    border-radius: 14px !important;
    border-color: rgba(21, 48, 107, 0.14) !important;
    background: rgba(255, 255, 255, 0.92);
}

.quiz-card {
    border: 1px solid rgba(79, 134, 255, 0.14) !important;
    border-radius: 24px !important;
    overflow: hidden;
}

.quiz-card:hover {
    transform: translateY(-8px) !important;
}

.exam-card {
    border: 1px solid rgba(214, 69, 69, 0.2) !important;
}

.exam-card .quiz-header {
    background: linear-gradient(135deg, #5c1017, #b62534) !important;
}

.exam-badge {
    background: rgba(214, 69, 69, 0.18) !important;
    color: #ffe4e4 !important;
}

.quiz-header {
    background: linear-gradient(135deg, var(--brand-900), var(--brand-700)) !important;
}

.quiz-body,
.quiz-footer,
.results-section,
.attempt-section,
.admin-content,
.question-container,
.question-grid-container {
    background: var(--surface-strong) !important;
}

.quiz-footer,
.attempt-header,
.review-item,
.data-table td,
.data-table th,
.results-table td,
.results-table th {
    border-color: rgba(21, 48, 107, 0.08) !important;
}

.status-badge {
    border-radius: 999px !important;
    padding: 8px 14px !important;
    font-weight: 700 !important;
}

.status-not-started {
    background: rgba(79, 134, 255, 0.12) !important;
    color: var(--brand-700) !important;
}

.status-in-progress {
    background: rgba(217, 137, 27, 0.14) !important;
    color: #9a6512 !important;
}

.status-completed {
    background: rgba(21, 159, 108, 0.14) !important;
    color: #117552 !important;
}

.status-failed {
    background: rgba(214, 69, 69, 0.12) !important;
    color: #a63030 !important;
}

.results-table,
.data-table {
    overflow: hidden;
    border-radius: 18px;
}

.results-table th,
.data-table th {
    background: linear-gradient(135deg, var(--brand-900), var(--brand-700)) !important;
}

.results-table tr:hover,
.data-table tr:hover {
    background: rgba(79, 134, 255, 0.05) !important;
}

.user-dropdown,
.user-dropdown-mobile,
.modal-content {
    border: 1px solid rgba(21, 48, 107, 0.12);
}

.user-dropdown a,
.user-dropdown-mobile a {
    display: flex;
    align-items: center;
    gap: 10px;
}

.admin-header {
    background: linear-gradient(135deg, #10244d 0%, #1f4da3 70%, #63a7ff 100%) !important;
    border-radius: 28px !important;
    box-shadow: var(--shadow-soft);
}

.admin-tabs {
    background: rgba(255, 255, 255, 0.56) !important;
    border-radius: 20px !important;
}

.tab {
    border-radius: 14px !important;
}

.tab.active {
    background: linear-gradient(135deg, var(--brand-800), var(--brand-500)) !important;
    border-color: transparent !important;
}

.stat-card {
    background: linear-gradient(160deg, #173572 0%, #2d63c8 60%, #74b0ff 100%) !important;
    border-radius: 24px !important;
}

.score-circle,
.score-inner {
    box-shadow: 0 16px 30px rgba(15, 29, 58, 0.14);
}

.view-btn {
    padding: 10px 14px;
    border: none;
    border-radius: 12px;
    background: rgba(31, 77, 163, 0.1);
    color: var(--brand-800);
    font-weight: 600;
    cursor: pointer;
}

.view-btn:hover {
    background: var(--brand-800);
    color: #fff;
}

.no-results,
.no-quizzes {
    padding: 48px 24px !important;
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(237, 244, 255, 0.92));
    border: 1px dashed rgba(21, 48, 107, 0.18);
}

.auth-intro,
.two-factor-card,
.security-panel,
.security-summary-card,
.security-method-card {
    border: 1px solid var(--surface-border);
    background: rgba(255, 255, 255, 0.88);
}

.auth-intro {
    padding: 18px 20px;
    border-radius: 18px;
    margin-bottom: 22px;
}

.auth-intro h3,
.security-summary-card h3,
.security-panel h3 {
    margin: 8px 0;
    color: var(--brand-900);
    letter-spacing: -0.03em;
}

.auth-intro-label,
.security-eyebrow {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--brand-700);
}

.auth-intro p,
.security-summary-card p,
.security-panel p,
.security-method-card span {
    color: var(--text-muted);
}

.two-factor-card {
    border-radius: 20px;
    padding: 22px;
}

.two-factor-form .form-footer {
    margin-top: 14px;
}

.two-factor-actions,
.security-actions,
.inline-status-row,
.two-factor-admin-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.security-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
    padding: 22px 24px;
    border-radius: 22px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-card);
}

.security-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 9px 14px;
    font-size: 0.86rem;
    font-weight: 700;
}

.security-method-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.security-method-card {
    appearance: none;
    border-radius: 22px;
    padding: 20px;
    text-align: left;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.security-method-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-soft);
}

.security-method-card strong {
    display: block;
    margin: 12px 0 8px;
    color: var(--brand-900);
    font-size: 1rem;
}

.security-method-icon {
    display: inline-flex;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    align-items: center;
    justify-content: center;
    background: rgba(79, 134, 255, 0.12);
    color: var(--brand-700);
    font-size: 1.1rem;
}

.security-summary-card {
    border-radius: 22px;
    padding: 20px;
}

.secret-display {
    margin: 14px 0;
    padding: 14px 16px;
    border-radius: 14px;
    background: var(--brand-900);
    color: #fff;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    letter-spacing: 0.18em;
    word-break: break-word;
}

.recovery-code-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 14px;
    padding-left: 20px;
}

.compact-card {
    padding: 16px;
}

.compact-list {
    margin-top: 10px;
}

.muted-inline {
    color: var(--text-muted);
    font-size: 0.92rem;
}

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
    }

    .aircraft-icon {
        justify-self: start;
        font-size: 6rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: 68px !important;
        padding-bottom: 68px !important;
    }

    .hero-points {
        grid-template-columns: 1fr;
    }

    .security-panel,
    .security-method-grid {
        grid-template-columns: 1fr;
    }

    .security-panel {
        flex-direction: column;
        align-items: flex-start;
    }

    .recovery-code-list {
        grid-template-columns: 1fr;
    }

    .category-filter,
    .results-section,
    .attempt-section,
    .admin-content {
        padding: 18px !important;
    }

    .results-table,
    .data-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}