/* ===== Design Tokens ===== */
:root {
    --vl-font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --vl-font-mono: ui-monospace, "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;

    /* Brand */
    --vl-pink-start: #f200cf;
    --vl-pink-end: #ff278f;

    /* Light palette */
    --vl-bg: #ffffff;
    --vl-bg-alt: #f5f5f8;
    --vl-surface: #ffffff;
    --vl-text: #1a1a2e;
    --vl-text-secondary: #555570;
    --vl-border: #e0e0e8;
    --vl-link: #7c3aed;
    --vl-link-hover: #5b21b6;

    /* Hero */
    --vl-hero-bg: #fdf2f8;
    --vl-hero-text: #1a1a2e;

    /* CTA */
    --vl-cta-bg: #fdf2f8;
    --vl-cta-text: #1a1a2e;

    /* Code block */
    --vl-code-bg: #1e1e2e;
    --vl-code-text: #cdd6f4;

    /* Buttons */
    --vl-btn-primary-bg: #d6249f;
    --vl-btn-primary-text: #ffffff;
    --vl-btn-primary-hover: #b91c8a;
    --vl-btn-secondary-bg: transparent;
    --vl-btn-secondary-text: #1a1a2e;
    --vl-btn-secondary-border: #c0c0cc;
    --vl-btn-secondary-hover-bg: #f0f0f4;

    /* Cards */
    --vl-card-bg: #ffffff;
    --vl-card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    --vl-card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.1);

    /* Logo text fill */
    --vl-logo-fill: #2e333d;

    /* Step icon */
    --vl-icon-color: #d6249f;

    /* Footer */
    --vl-footer-bg: #f5f5f8;
    --vl-footer-text: #555570;

    /* Nav */
    --vl-nav-bg: var(--vl-bg);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --vl-bg: #111118;
        --vl-bg-alt: #1a1a24;
        --vl-surface: #1e1e2e;
        --vl-text: #e4e4ef;
        --vl-text-secondary: #a0a0b8;
        --vl-border: #2e2e40;
        --vl-link: #c084fc;
        --vl-link-hover: #d8b4fe;

        --vl-hero-bg: #1a1020;
        --vl-hero-text: #e4e4ef;

        --vl-cta-bg: #1a1020;
        --vl-cta-text: #e4e4ef;

        --vl-btn-primary-bg: #d6249f;
        --vl-btn-primary-text: #ffffff;
        --vl-btn-primary-hover: #e84ab5;
        --vl-btn-secondary-bg: transparent;
        --vl-btn-secondary-text: #e4e4ef;
        --vl-btn-secondary-border: #444460;
        --vl-btn-secondary-hover-bg: #2a2a3a;

        --vl-card-bg: #1e1e2e;
        --vl-card-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
        --vl-card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.4);

        --vl-logo-fill: #ebecf0;

        --vl-icon-color: #e84ab5;

        --vl-footer-bg: #1a1a24;
        --vl-footer-text: #a0a0b8;

        --vl-nav-bg: #111118;
    }
}

[data-theme="dark"] {
    --vl-bg: #111118;
    --vl-bg-alt: #1a1a24;
    --vl-surface: #1e1e2e;
    --vl-text: #e4e4ef;
    --vl-text-secondary: #a0a0b8;
    --vl-border: #2e2e40;
    --vl-link: #c084fc;
    --vl-link-hover: #d8b4fe;

    --vl-hero-bg: #1a1020;
    --vl-hero-text: #e4e4ef;

    --vl-cta-bg: #1a1020;
    --vl-cta-text: #e4e4ef;

    --vl-btn-primary-bg: #d6249f;
    --vl-btn-primary-text: #ffffff;
    --vl-btn-primary-hover: #e84ab5;
    --vl-btn-secondary-bg: transparent;
    --vl-btn-secondary-text: #e4e4ef;
    --vl-btn-secondary-border: #444460;
    --vl-btn-secondary-hover-bg: #2a2a3a;

    --vl-card-bg: #1e1e2e;
    --vl-card-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --vl-card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.4);

    --vl-logo-fill: #ebecf0;

    --vl-icon-color: #e84ab5;

    --vl-footer-bg: #1a1a24;
    --vl-footer-text: #a0a0b8;

    --vl-nav-bg: #111118;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--vl-font-sans);
    color: var(--vl-text);
    background-color: var(--vl-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--vl-link-hover);
}

:focus-visible {
    outline: 2px solid var(--vl-link);
    outline-offset: 2px;
    border-radius: 3px;
}

.btn:focus-visible {
    outline-offset: 3px;
}

/* ===== Skip link ===== */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0.5rem;
    background: var(--vl-btn-primary-bg);
    color: var(--vl-btn-primary-text);
    padding: 0.6rem 1rem;
    border-radius: 0 0 6px 6px;
    font-weight: 600;
    z-index: 100;
    transition: top 0.15s;
}

.skip-link:focus,
.skip-link:focus-visible {
    top: 0;
    color: var(--vl-btn-primary-text);
}

code {
    font-family: var(--vl-font-mono);
    font-size: 0.875em;
    background: var(--vl-bg-alt);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}

/* ===== Layout ===== */
.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.section {
    padding: 4rem 0;
}

/* ===== Grid ===== */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-3 {
    grid-template-columns: 1fr;
}

.grid-2 {
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 960px) {
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
    border-radius: 6px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, transform 0.1s;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

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

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

.btn-secondary {
    background: var(--vl-btn-secondary-bg);
    color: var(--vl-btn-secondary-text);
    border-color: var(--vl-btn-secondary-border);
}

.btn-secondary:hover {
    background: var(--vl-btn-secondary-hover-bg);
    color: var(--vl-btn-secondary-text);
}

.btn-lg {
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
}

.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

/* ===== Navbar ===== */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    background: var(--vl-nav-bg);
}

.navbar-brand a {
    display: flex;
    align-items: center;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.navbar-links a {
    color: var(--vl-text);
    font-weight: 500;
    font-size: 0.95rem;
}

.navbar-links a:hover {
    color: var(--vl-link);
}

.navbar-badges {
    display: none;
    align-items: center;
    gap: 0.75rem;
}

.navbar-badges img {
    height: 20px;
}

.navbar-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    min-width: 44px;
    min-height: 44px;
}

.navbar-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--vl-text);
    border-radius: 1px;
    transition: transform 0.2s, opacity 0.2s;
}

.navbar-menu {
    display: none;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem 0;
}

.navbar-menu.is-open {
    display: flex;
}

.navbar-menu a {
    color: var(--vl-text);
    font-weight: 500;
    padding: 0.25rem 0;
}

@media (min-width: 768px) {
    .navbar-toggle {
        display: none;
    }

    .navbar-menu {
        display: flex;
        flex-direction: row;
        align-items: center;
        padding: 0;
    }

    .navbar-badges {
        display: flex;
    }
}

/* ===== Theme toggle ===== */
.theme-toggle {
    background: none;
    border: 1px solid var(--vl-border);
    border-radius: 6px;
    cursor: pointer;
    padding: 0.55rem;
    min-width: 40px;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--vl-text-secondary);
    transition: color 0.15s;
}

.theme-toggle:hover {
    color: var(--vl-text);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    width: 18px;
    height: 18px;
}

/* Default: hide moon in light, hide sun in dark */
.theme-toggle .icon-moon {
    display: block;
}

.theme-toggle .icon-sun {
    display: none;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-moon {
        display: none;
    }

    :root:not([data-theme="light"]) .theme-toggle .icon-sun {
        display: block;
    }
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

[data-theme="light"] .theme-toggle .icon-moon {
    display: block;
}

[data-theme="light"] .theme-toggle .icon-sun {
    display: none;
}

/* ===== Hero ===== */
.hero {
    background: var(--vl-hero-bg);
    color: var(--vl-hero-text);
    padding: 4rem 0;
}

.hero-inner {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.hero-content {
    flex: 1;
}

.hero h1 {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero p {
    margin-top: 1rem;
    font-size: 1.1rem;
    color: var(--vl-text-secondary);
    line-height: 1.7;
}

.hero .hero-tagline {
    margin-top: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--vl-btn-primary-bg);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero .btn-group {
    margin-top: 2rem;
}

.hero-code {
    flex: 1;
    min-width: 0;
}

@media (min-width: 960px) {
    .hero {
        padding: 5rem 0;
    }

    .hero-inner {
        flex-direction: row;
        align-items: center;
    }

    .hero h1 {
        font-size: 2.75rem;
    }

    .hero-content {
        flex: 5;
    }

    .hero-code {
        flex: 6;
    }
}

/* ===== Code blocks ===== */
.code-block {
    background: var(--vl-code-bg);
    color: var(--vl-code-text);
    border-radius: 10px;
    padding: 1.25rem 1.5rem;
    overflow-x: auto;
    font-family: var(--vl-font-mono);
    font-size: 0.825rem;
    line-height: 1.65;
    white-space: pre;
}

.code-block code {
    background: none;
    padding: 0;
    font-size: inherit;
    white-space: pre;
}

.c-comment {
    color: #6c7086;
}

.c-key {
    color: #89b4fa;
}

.c-string {
    color: #a6e3a1;
}

.c-value {
    color: #f9e2af;
}

.c-output {
    color: #a6e3a1;
}

.c-cmd {
    color: #cdd6f4;
}

/* ===== Section headings ===== */
.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2.5rem;
    letter-spacing: -0.01em;
}

/* ===== Steps ===== */
.step {
    text-align: center;
}

.step-icon {
    color: var(--vl-icon-color);
    margin-bottom: 0.75rem;
}

.step h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step p {
    color: var(--vl-text-secondary);
    font-size: 0.95rem;
}

/* ===== Cards ===== */
.card {
    background: var(--vl-card-bg);
    border: 1px solid var(--vl-border);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: var(--vl-card-shadow);
    transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
    box-shadow: var(--vl-card-shadow-hover);
    transform: translateY(-2px);
}

.card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card p {
    color: var(--vl-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== Features section ===== */
.bg-alt {
    background: var(--vl-bg-alt);
}

/* ===== Install options ===== */
.install-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
    max-width: 720px;
    margin: 0 auto 1rem;
}

@media (min-width: 640px) {
    .install-grid {
        grid-template-columns: 1fr 1fr;
    }

    .install-option:first-child {
        grid-column: 1 / -1;
    }
}

.install-option h3 {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--vl-text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.install-option .code-block {
    padding: 0.9rem 1.1rem;
    font-size: 0.8rem;
    line-height: 1.5;
}

.install-more {
    text-align: center;
    font-size: 0.9rem;
    color: var(--vl-text-secondary);
    margin: 0 auto 2rem;
    max-width: 720px;
}

/* ===== CLI example ===== */
.cli-example {
    max-width: 720px;
    margin: 0 auto;
}

/* ===== CTA ===== */
.cta {
    background: var(--vl-cta-bg);
    text-align: center;
    padding: 4rem 0;
}

.cta h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.cta p {
    color: var(--vl-text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.cta .btn-group {
    justify-content: center;
}

/* ===== Footer ===== */
.footer {
    background: var(--vl-footer-bg);
    color: var(--vl-footer-text);
    padding: 3rem 0 2rem;
}

.footer-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
}

.footer-brand .logo-fill {
    fill: var(--vl-logo-fill);
}

.footer h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--vl-text);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.footer ul {
    list-style: none;
}

.footer li + li {
    margin-top: 0.4rem;
}

.footer a {
    color: var(--vl-footer-text);
    font-size: 0.9rem;
}

.footer a:hover {
    color: var(--vl-link);
}

.footer-bottom {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--vl-border);
    font-size: 0.8rem;
    color: var(--vl-text-secondary);
}

@media (min-width: 640px) {
    .footer-grid {
        grid-template-columns: 2fr repeat(3, 1fr);
    }
}

/* ===== Logo ===== */
.logo-fill {
    fill: var(--vl-logo-fill);
}

/* ===== Utilities ===== */
.text-center {
    text-align: center;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}