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

:root {
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #111827;
    --muted: #64748b;
    --border: #e2e8f0;

    --primary: #2563eb;
    --primary-dark: #1d4ed8;

    --accent: #06b6d4;

    --shadow:
        0 15px 45px rgba(15, 23, 42, 0.08);
}

body.dark {
    --bg: #0f172a;
    --surface: #172033;
    --text: #f8fafc;
    --muted: #94a3b8;
    --border: #334155;

    --shadow:
        0 15px 45px rgba(0, 0, 0, 0.25);
}

body {
    font-family:
        Inter,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;

    background: var(--bg);
    color: var(--text);

    line-height: 1.6;

    transition:
        background 0.25s ease,
        color 0.25s ease;
}

.container {
    width: min(1120px, 92%);
    margin: auto;
}


/* HEADER */

.site-header {
    background: var(--surface);

    position: sticky;
    top: 0;

    z-index: 1000;

    border-bottom: 1px solid var(--border);
}

.nav-container {
    height: 70px;

    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 24px;
    font-weight: 800;

    text-decoration: none;
    color: var(--text);
}

.logo span {
    color: var(--primary);
}

nav {
    display: flex;
    gap: 28px;
}

nav a {
    text-decoration: none;
    color: var(--muted);

    font-weight: 600;
    font-size: 14px;
}

nav a:hover {
    color: var(--primary);
}

.theme-button {
    border: 1px solid var(--border);

    background: var(--surface);

    width: 42px;
    height: 42px;

    border-radius: 12px;

    cursor: pointer;

    font-size: 18px;
}


/* HERO */

.hero {
    padding:
        75px 0
        55px;

    text-align: center;

    background:
        radial-gradient(
            circle at top,
            rgba(37, 99, 235, 0.10),
            transparent 42%
        );
}

.eyebrow {
    color: var(--primary);

    font-size: 13px;
    font-weight: 800;

    letter-spacing: 1.5px;

    text-transform: uppercase;

    margin-bottom: 10px;
}

.hero h1 {
    font-size:
        clamp(
            38px,
            7vw,
            64px
        );

    line-height: 1.05;

    letter-spacing: -2px;
}

.hero-subtitle {
    max-width: 650px;

    margin:
        18px auto
        35px;

    color: var(--muted);

    font-size: 18px;
}


/* TEST CARD */

.test-card {
    width: min(780px, 100%);

    margin: auto;

    padding: 28px;

    background: var(--surface);

    border: 1px solid var(--border);

    border-radius: 24px;

    box-shadow: var(--shadow);
}

.selection-group {
    margin-bottom: 25px;
}

.selection-title {
    font-size: 13px;
    font-weight: 800;

    margin-bottom: 12px;

    text-transform: uppercase;

    color: var(--muted);
}

.option-buttons {
    display: flex;
    justify-content: center;

    flex-wrap: wrap;

    gap: 10px;
}

.option-buttons button {
    padding: 11px 17px;

    border: 1px solid var(--border);

    background: var(--surface);

    color: var(--text);

    border-radius: 10px;

    cursor: pointer;

    font-weight: 700;
}

.option-buttons button:hover {
    border-color: var(--primary);

    color: var(--primary);
}

.option-buttons button.active {
    background: var(--primary);

    border-color: var(--primary);

    color: white;
}


/* BUTTONS */

.primary-button,
.secondary-button {
    border: 0;

    border-radius: 12px;

    padding: 14px 26px;

    font-size: 15px;
    font-weight: 800;

    cursor: pointer;
}

.primary-button {
    color: white;

    background:
        linear-gradient(
            135deg,
            var(--primary),
            var(--accent)
        );

    min-width: 190px;
}

.primary-button:hover {
    opacity: 0.92;
}

.secondary-button {
    background: var(--surface);

    color: var(--text);

    border: 1px solid var(--border);
}


/* TYPING TEST */

.typing-section {
    padding:
        40px 0
        70px;
}

.typing-card {
    background: var(--surface);

    border:
        1px solid
        var(--border);

    border-radius: 22px;

    padding: 30px;

    box-shadow: var(--shadow);
}

.typing-stats {
    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    margin-bottom: 24px;

    border-bottom:
        1px solid
        var(--border);

    padding-bottom: 20px;
}

.typing-stats div {
    text-align: center;
}

.typing-stats span {
    display: block;

    font-size: 27px;
    font-weight: 800;

    color: var(--primary);
}

.typing-stats small {
    color: var(--muted);
}

.text-display {
    font-family:
        "Courier New",
        monospace;

    font-size: 20px;

    line-height: 1.9;

    min-height: 140px;

    padding: 22px;

    border-radius: 14px;

    background: var(--bg);

    border:
        1px solid
        var(--border);

    margin-bottom: 16px;
}

#typingInput {
    width: 100%;

    min-height: 130px;

    padding: 18px;

    font-size: 18px;

    color: var(--text);

    background: var(--surface);

    border:
        2px solid
        var(--border);

    border-radius: 14px;

    resize: vertical;

    outline: none;

    margin-bottom: 16px;
}

#typingInput:focus {
    border-color: var(--primary);
}


/* SECTIONS */

.section-heading {
    text-align: center;

    margin-bottom: 35px;
}

.section-heading h2 {
    font-size:
        clamp(
            28px,
            4vw,
            40px
        );

    margin-bottom: 10px;
}

.section-heading p:not(.eyebrow) {
    color: var(--muted);
}


/* QUICK TESTS */

.quick-tests,
.practice-section,
.seo-section,
.faq-section {
    padding: 75px 0;
}

.quick-grid {
    display: grid;

    grid-template-columns:
        repeat(4, 1fr);

    gap: 16px;
}

.quick-card {
    background: var(--surface);

    border:
        1px solid
        var(--border);

    border-radius: 16px;

    padding: 25px 15px;

    cursor: pointer;

    color: var(--text);

    transition:
        transform 0.2s ease,
        border 0.2s ease;
}

.quick-card:hover {
    transform:
        translateY(-4px);

    border-color:
        var(--primary);
}

.quick-card strong {
    display: block;

    font-size: 18px;

    color: var(--primary);
}

.quick-card span {
    font-size: 13px;

    color: var(--muted);
}


/* RESULTS */

.results-section {
    padding:
        60px 0;

    text-align: center;
}

.result-grid {
    display: grid;

    grid-template-columns:
        repeat(4, 1fr);

    gap: 16px;

    margin-bottom: 30px;
}

.result-card {
    background: var(--surface);

    border:
        1px solid
        var(--border);

    padding: 30px;

    border-radius: 18px;
}

.result-card strong {
    display: block;

    font-size: 35px;

    color: var(--primary);
}

.result-card span {
    color: var(--muted);
}


/* PRACTICE */

.practice-grid {
    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    gap: 20px;
}

.practice-card {
    text-decoration: none;

    color: var(--text);

    background: var(--surface);

    border:
        1px solid
        var(--border);

    border-radius: 18px;

    padding: 30px;

    transition:
        transform 0.2s ease,
        border 0.2s ease;
}

.practice-card:hover {
    transform:
        translateY(-5px);

    border-color:
        var(--primary);
}

.practice-icon {
    width: 54px;
    height: 54px;

    display: flex;

    align-items: center;
    justify-content: center;

    border-radius: 14px;

    background:
        rgba(
            37,
            99,
            235,
            0.1
        );

    color: var(--primary);

    font-weight: 800;

    margin-bottom: 20px;
}

.practice-card h3 {
    margin-bottom: 8px;
}

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


/* DAILY */

.daily-section {
    padding:
        40px 0
        70px;
}

.daily-card {
    padding: 40px;

    border-radius: 22px;

    background:
        linear-gradient(
            135deg,
            rgba(
                37,
                99,
                235,
                0.12
            ),
            rgba(
                6,
                182,
                212,
                0.12
            )
        );

    border:
        1px solid
        var(--border);

    display: flex;

    justify-content: space-between;
    align-items: center;

    gap: 30px;
}

.daily-card h2 {
    margin-bottom: 8px;
}

.daily-card p:not(.eyebrow) {
    color: var(--muted);
}


/* SEO */

.seo-section {
    background: var(--surface);
}

.content-columns {
    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    gap: 30px;
}

.content-columns h3 {
    margin-bottom: 10px;
}

.content-columns p {
    color: var(--muted);
}


/* FAQ */

.faq-grid {
    display: grid;

    grid-template-columns:
        repeat(2, 1fr);

    gap: 18px;
}

.faq-grid article {
    background: var(--surface);

    padding: 25px;

    border:
        1px solid
        var(--border);

    border-radius: 16px;
}

.faq-grid h3 {
    margin-bottom: 10px;
}

.faq-grid p {
    color: var(--muted);
}


/* FOOTER */

footer {
    border-top:
        1px solid
        var(--border);

    padding:
        45px 0
        20px;

    background: var(--surface);
}

.footer-container {
    display: flex;

    justify-content: space-between;
    align-items: center;

    gap: 30px;
}

.footer-container p {
    color: var(--muted);

    margin-top: 6px;
}

.footer-links {
    display: flex;

    gap: 20px;

    flex-wrap: wrap;
}

.footer-links a {
    text-decoration: none;

    color: var(--muted);

    font-size: 14px;
}

.footer-links a:hover {
    color: var(--primary);
}

.copyright {
    text-align: center;

    color: var(--muted);

    font-size: 13px;

    margin-top: 35px;
}


/* HELPERS */

.hidden {
    display: none;
}


/* MOBILE */

@media (max-width: 800px) {

    nav {
        display: none;
    }

    .hero {
        padding:
            55px 0
            40px;
    }

    .hero h1 {
        letter-spacing:
            -1px;
    }

    .test-card {
        padding: 22px;
    }

    .quick-grid,
    .result-grid {
        grid-template-columns:
            repeat(2, 1fr);
    }

    .practice-grid,
    .content-columns,
    .faq-grid {
        grid-template-columns:
            1fr;
    }

    .daily-card {
        flex-direction: column;

        align-items: flex-start;
    }

    .footer-container {
        flex-direction: column;

        align-items: flex-start;
    }

}


@media (max-width: 480px) {

    .quick-grid,
    .result-grid {
        grid-template-columns:
            1fr;
    }

    .typing-card {
        padding: 18px;
    }

    .text-display {
        font-size: 17px;
    }

}