/* Design tokens */
:root {
    --color-primary: #4f46e5;
    --color-secondary: #7c3aed;
    --color-accent: #f59e0b;
    --color-success: #10b981;
    --color-danger: #ef4444;
    --color-warning: #f97316;
    --color-text: #111827;
    --color-muted: #6b7280;
    --color-bg: #f9fafb;
    --color-card: #ffffff;
    --color-border: #e5e7eb;
    --shadow-sm: 0 8px 24px rgba(17, 24, 39, 0.08);
    --shadow-md: 0 18px 48px rgba(17, 24, 39, 0.12);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --font-main: Inter, Poppins, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* Dark theme */
:root[data-theme="dark"] {
    --color-text: #f9fafb;
    --color-muted: #cbd5e1;
    --color-bg: #0f172a;
    --color-card: #111827;
    --color-border: #334155;
    --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.32);
    --shadow-md: 0 18px 48px rgba(0, 0, 0, 0.42);
}

/* Base elements */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-main);
    line-height: 1.6;
    text-rendering: optimizeLegibility;
}

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

a:hover {
    color: var(--color-secondary);
}

img {
    display: block;
    max-width: 100%;
}

button,
input,
select,
textarea {
    font: inherit;
}

/* Accessibility */
.skip-link {
    position: absolute;
    left: var(--space-4);
    top: -48px;
    z-index: 1000;
    border-radius: var(--radius-sm);
    background: var(--color-primary);
    color: #ffffff;
    padding: var(--space-2) var(--space-4);
    transition: top 180ms ease;
}

.skip-link:focus {
    top: var(--space-4);
    color: #ffffff;
}

:focus-visible {
    outline: 3px solid rgba(79, 70, 229, 0.35);
    outline-offset: 3px;
}

/* Header and navigation */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(249, 250, 251, 0.86);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(229, 231, 235, 0.75);
    transition: box-shadow 180ms ease, background 180ms ease;
}

:root[data-theme="dark"] .site-header {
    background: rgba(15, 23, 42, 0.86);
}

.site-header.is-scrolled {
    box-shadow: var(--shadow-sm);
}

.navbar {
    min-height: 72px;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text);
    font-weight: 800;
}

.brand-icon {
    display: inline-grid;
    width: 38px;
    height: 38px;
    place-items: center;
    border-radius: 12px;
    overflow: hidden;
    background: transparent;
    color: #ffffff;
    box-shadow: 0 10px 24px rgba(79, 70, 229, 0.24);
}

.brand-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.nav-link {
    color: var(--color-text);
    font-weight: 600;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.icon-button {
    display: inline-grid;
    width: 40px;
    height: 40px;
    place-items: center;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    background: var(--color-card);
    color: var(--color-text);
}

/* Buttons */
.btn {
    border-radius: var(--radius-sm);
    font-weight: 700;
}

.btn-primary {
    border-color: var(--color-primary);
    background: var(--color-primary);
}

.btn-primary:hover {
    border-color: var(--color-secondary);
    background: var(--color-secondary);
}

.btn-outline-primary {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-outline-primary:hover {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: #ffffff;
}

/* Homepage */
.hero-section {
    padding: 88px 0 56px;
    background:
        radial-gradient(circle at 15% 20%, rgba(245, 158, 11, 0.14), transparent 28%),
        linear-gradient(135deg, rgba(79, 70, 229, 0.09), rgba(124, 58, 237, 0.08));
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: var(--space-7);
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    margin-bottom: var(--space-3);
    color: var(--color-primary);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

.hero-copy h1,
.typing-hero h1 {
    max-width: 820px;
    margin: 0 0 var(--space-4);
    font-size: clamp(2.4rem, 5vw, 4.7rem);
    font-weight: 800;
    line-height: 1.04;
}

.hero-copy p,
.typing-hero p {
    max-width: 680px;
    color: var(--color-muted);
    font-size: 1.12rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.hero-preview {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-card);
    box-shadow: var(--shadow-md);
    padding: var(--space-6);
}

.preview-toolbar {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}

.preview-toolbar span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-border);
}

.preview-toolbar span:nth-child(1) {
    background: var(--color-danger);
}

.preview-toolbar span:nth-child(2) {
    background: var(--color-accent);
}

.preview-toolbar span:nth-child(3) {
    background: var(--color-success);
}

.preview-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.preview-stats span {
    border-radius: var(--radius-sm);
    background: rgba(79, 70, 229, 0.08);
    color: var(--color-primary);
    padding: var(--space-3);
    font-weight: 800;
    text-align: center;
}

.section-pad {
    padding: 64px 0;
}

.content-hero {
    padding: 64px 0 40px;
    background:
        radial-gradient(circle at 80% 10%, rgba(245, 158, 11, 0.14), transparent 30%),
        linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(124, 58, 237, 0.07));
}

.content-hero h1 {
    max-width: 920px;
    margin: 0 0 var(--space-4);
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.08;
}

.content-hero p {
    max-width: 760px;
    color: var(--color-muted);
    font-size: 1.12rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
}

.exam-card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-5);
}

.content-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
}

.toc-card,
.article-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-card);
    box-shadow: var(--shadow-sm);
    padding: var(--space-5);
}

.toc-card {
    display: none;
}

.toc-card h2,
.article-card h2 {
    font-size: 1.25rem;
    font-weight: 800;
}

.toc-card a {
    display: block;
    margin-top: var(--space-2);
    color: var(--color-muted);
    font-weight: 700;
}

.article-card {
    font-size: 1.03rem;
}

.article-card h2 {
    margin-top: var(--space-6);
}

.article-card h2:first-child {
    margin-top: 0;
}

.article-card h3 {
    margin-top: var(--space-5);
    font-size: 1.08rem;
    font-weight: 800;
}

.quick-facts-table th {
    width: 220px;
    color: var(--color-muted);
}

.practice-cta,
.disclaimer-box,
.sample-passage {
    border: 1px solid rgba(79, 70, 229, 0.2);
    border-radius: var(--radius-md);
    background: rgba(79, 70, 229, 0.06);
    padding: var(--space-5);
}

.practice-cta {
    display: flex;
    justify-content: space-between;
    gap: var(--space-4);
    align-items: center;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
}

.link-grid a,
.article-list article {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: rgba(249, 250, 251, 0.72);
    padding: var(--space-3);
    font-weight: 700;
}

:root[data-theme="dark"] .link-grid a,
:root[data-theme="dark"] .article-list article {
    background: rgba(15, 23, 42, 0.72);
}

.article-list {
    display: grid;
    gap: var(--space-4);
}

.article-list h3 {
    margin-top: 0;
}

.feature-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-card);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
}

.feature-card i {
    margin-bottom: var(--space-4);
    color: var(--color-primary);
    font-size: 2rem;
}

.feature-card h2 {
    font-size: 1.2rem;
    font-weight: 800;
}

.feature-card p {
    color: var(--color-muted);
}

.section-heading {
    max-width: 760px;
    margin-bottom: var(--space-5);
}

.section-heading h2 {
    margin: 0 0 var(--space-3);
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    font-weight: 800;
}

.section-heading p {
    color: var(--color-muted);
}

.latest-typists-section {
    background: linear-gradient(180deg, rgba(79, 70, 229, 0.06), transparent);
}

.latest-typists-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--space-4);
}

.typist-card {
    display: grid;
    gap: var(--space-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-card);
    box-shadow: var(--shadow-sm);
    padding: var(--space-4);
}

.typist-rank {
    display: inline-flex;
    width: max-content;
    border-radius: 999px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--color-primary);
    padding: 0.2rem 0.65rem;
    font-weight: 800;
}

.typist-card h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 800;
}

.typist-card p,
.typist-card small {
    margin: 0;
    color: var(--color-muted);
}

.typist-card strong {
    color: var(--color-primary);
    font-size: 1.75rem;
    line-height: 1;
}

.typist-empty-card {
    grid-column: 1 / -1;
    align-items: start;
    max-width: 520px;
}

/* Typing page layout */
.typing-shell {
    min-height: 100vh;
    padding: 32px 0 72px;
    background:
        linear-gradient(180deg, rgba(79, 70, 229, 0.08), transparent 300px),
        var(--color-bg);
}

.breadcrumb-wrap {
    margin-bottom: var(--space-5);
}

.breadcrumb {
    margin: 0;
}

.typing-hero {
    display: flex;
    justify-content: space-between;
    gap: var(--space-5);
    align-items: flex-end;
    margin-bottom: var(--space-5);
}

.typing-hero h1 {
    font-size: clamp(2rem, 4vw, 3.6rem);
}

.typing-status-pill {
    flex: 0 0 auto;
    border: 1px solid rgba(16, 185, 129, 0.35);
    border-radius: 999px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    padding: var(--space-2) var(--space-4);
    font-weight: 800;
}

.engine-panel,
.result-panel {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-card);
    box-shadow: var(--shadow-sm);
    padding: var(--space-5);
}

.typing-toolbar {
    display: grid;
    grid-template-columns: repeat(6, minmax(140px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.typing-toolbar label {
    display: grid;
    gap: var(--space-2);
    color: var(--color-muted);
    font-size: 0.84rem;
    font-weight: 800;
}

.form-select,
.typing-input {
    border-color: var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-card);
    color: var(--color-text);
}

.participant-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.9fr);
    gap: var(--space-5);
    align-items: end;
    margin-bottom: var(--space-5);
    border: 1px solid rgba(245, 158, 11, 0.28);
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(79, 70, 229, 0.06));
    padding: var(--space-5);
}

.participant-panel h2 {
    margin: 0 0 var(--space-2);
    font-size: 1.35rem;
    font-weight: 800;
}

.participant-panel p {
    margin: 0;
    color: var(--color-muted);
}

.participant-fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
}

.participant-fields label {
    display: grid;
    gap: var(--space-2);
    color: var(--color-muted);
    font-size: 0.84rem;
    font-weight: 800;
}

.name-warning {
    grid-column: 1 / -1;
    color: var(--color-danger) !important;
    font-weight: 800;
}

.stats-grid,
.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
    gap: var(--space-3);
}

.stat-card {
    min-height: 92px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: linear-gradient(180deg, rgba(79, 70, 229, 0.04), transparent);
    padding: var(--space-4);
}

.stat-card span {
    display: block;
    color: var(--color-muted);
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
}

.stat-card strong {
    display: block;
    margin-top: var(--space-2);
    color: var(--color-text);
    font-size: 1.55rem;
    font-weight: 800;
    line-height: 1;
}

.stat-card.highlight {
    border-color: rgba(79, 70, 229, 0.3);
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.16), rgba(245, 158, 11, 0.1));
}

.engine-progress {
    height: 10px;
    margin: var(--space-5) 0;
    border-radius: 999px;
    background: rgba(79, 70, 229, 0.1);
}

.engine-progress .progress-bar {
    width: 0;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transition: width 120ms linear;
}

.passage-card {
    display: grid;
    gap: var(--space-4);
}

.passage-text {
    min-height: 210px;
    max-height: 360px;
    overflow-x: hidden;
    overflow-y: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: rgba(249, 250, 251, 0.72);
    color: var(--color-text);
    padding: var(--space-5);
    font-size: 1.35rem;
    line-height: 2;
    white-space: pre-wrap;
    word-break: break-word;
    overflow-wrap: anywhere;
    scroll-behavior: smooth;
}

:root[data-theme="dark"] .passage-text {
    background: rgba(15, 23, 42, 0.72);
}

.char {
    display: inline;
    position: relative;
    border-radius: 4px;
    padding: 1px 1px;
}

.char.correct {
    color: var(--color-success);
}

.char.incorrect {
    background: rgba(239, 68, 68, 0.16);
    color: var(--color-danger);
}

.char.current {
    background: rgba(245, 158, 11, 0.18);
    color: var(--color-text);
    box-shadow: inset 0 -2px 0 var(--color-accent);
}

.char.current::after {
    position: absolute;
    left: 0;
    top: 12%;
    width: 2px;
    height: 76%;
    border-radius: 999px;
    background: var(--color-accent);
    content: "";
    animation: cursorBlink 900ms steps(2, start) infinite;
}

.char.next {
    background: rgba(79, 70, 229, 0.08);
}

.typing-input {
    min-height: 150px;
    padding: var(--space-4);
    resize: vertical;
}

.completion-flash {
    display: none;
    border: 1px solid rgba(16, 185, 129, 0.24);
    border-radius: var(--radius-sm);
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    padding: var(--space-3) var(--space-4);
    font-weight: 800;
}

.completion-flash.is-visible {
    display: block;
    animation: completionPulse 900ms ease;
}

.typing-shell:fullscreen {
    overflow: auto;
    background: var(--color-bg);
    padding: var(--space-5);
}

.bottom-toolbar,
.result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.result-panel {
    margin-top: var(--space-5);
}

.result-header {
    display: flex;
    justify-content: space-between;
    gap: var(--space-5);
    margin-bottom: var(--space-5);
}

.result-header h2 {
    margin: 0;
    font-size: 2rem;
    font-weight: 800;
}

.result-header p {
    color: var(--color-muted);
}

.stars {
    color: var(--color-accent);
    font-size: 1.5rem;
    white-space: nowrap;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    background: var(--color-card);
    padding: 48px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: var(--space-7);
}

.footer-brand {
    margin-bottom: var(--space-4);
}

.site-footer h2 {
    font-size: 1rem;
    font-weight: 800;
}

.site-footer p,
.site-footer small {
    color: var(--color-muted);
}

.site-footer a:not(.brand-mark) {
    display: block;
    margin-top: var(--space-2);
    color: var(--color-muted);
}

.footer-bottom {
    margin-top: var(--space-6);
}

/* User dashboard preview */
.dashboard-shell {
    padding: 48px 0 72px;
}

.dashboard-hero {
    display: flex;
    justify-content: space-between;
    gap: var(--space-5);
    align-items: center;
    margin-bottom: var(--space-5);
}

.dashboard-hero h1 {
    margin: 0 0 var(--space-3);
    font-size: clamp(2rem, 4vw, 3.4rem);
    font-weight: 800;
}

.dashboard-hero p {
    color: var(--color-muted);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.admin-grid-two {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-5);
    margin-bottom: var(--space-5);
}

.admin-panel {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-card);
    box-shadow: var(--shadow-sm);
    padding: var(--space-5);
}

.admin-panel h2 {
    margin-bottom: var(--space-4);
    font-size: 1.2rem;
    font-weight: 800;
}

.badge-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
}

.badge-grid span {
    border: 1px solid rgba(79, 70, 229, 0.24);
    border-radius: 999px;
    background: rgba(79, 70, 229, 0.08);
    color: var(--color-primary);
    padding: var(--space-2) var(--space-3);
    font-weight: 800;
    text-align: center;
}

/* Animations */
@keyframes cursorBlink {
    50% {
        opacity: 0;
    }
}

@keyframes completionPulse {
    0% {
        transform: scale(0.98);
        opacity: 0;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Tablet layout */
@media (max-width: 991.98px) {
    .hero-grid,
    .feature-grid,
    .exam-card-grid,
    .footer-grid,
    .participant-panel {
        grid-template-columns: 1fr;
    }

    .latest-typists-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .content-layout {
        grid-template-columns: 1fr;
    }

    .toc-card {
        position: static;
    }

    .typing-toolbar {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .stats-grid,
    .result-grid,
    .dashboard-grid,
    .admin-grid-two {
        grid-template-columns: repeat(3, 1fr);
    }

    .typing-hero,
    .result-header,
    .dashboard-hero,
    .practice-cta {
        align-items: flex-start;
        flex-direction: column;
    }
}

/* Mobile layout */
@media (max-width: 575.98px) {
    .hero-section {
        padding: 56px 0 40px;
    }

    .hero-copy h1,
    .typing-hero h1 {
        font-size: 2.2rem;
    }

    .hero-actions,
    .bottom-toolbar,
    .result-actions {
        flex-direction: column;
    }

    .hero-actions .btn,
    .bottom-toolbar .btn,
    .result-actions .btn {
        width: 100%;
    }

    .preview-stats,
    .typing-toolbar,
    .participant-fields,
    .latest-typists-grid,
    .stats-grid,
    .result-grid,
    .dashboard-grid,
    .admin-grid-two,
    .badge-grid,
    .link-grid {
        grid-template-columns: 1fr;
    }

    .engine-panel,
    .result-panel,
    .hero-preview,
    .feature-card {
        border-radius: var(--radius-md);
        padding: var(--space-4);
    }

    .passage-text {
        min-height: 180px;
        font-size: 1.12rem;
        line-height: 1.9;
    }
}