/*
 * Respondami website styles
 * Colors derived from the application's gh-dark theme
 */

/* ─── CSS Custom Properties ─── */
:root {
    /* Background colors */
    --bg: #212830;
    --bg-dark: #151B23;
    --bg-light: #2a313c;
    --bg-active: #262c36;

    /* Text colors */
    --text: #d1d7e0;
    --text-muted: #9198a1;
    --text-dim: #656c76;

    /* Accent colors */
    --accent: #478be6;
    --accent-hover: #539bf5;

    /* Semantic colors */
    --green: #3e8a41;
    --red: #e5534b;
    --orange: #c69026;
    --cyan: #2a9ea8;
    --blue: #539bf5;
    --blue-bright: #4a8ed6;
    --purple: #b083f0;

    /* Borders */
    --border: #3d444d;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-xxl: 6rem;

    /* Layout */
    --max-width: 1100px;
    --header-height: 60px;
    --border-radius: 8px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

h1, h2, h3, h4 {
    line-height: 1.2;
    color: var(--text);
}

h1 {
    font-size: 2.8rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
    text-align: center;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

p {
    margin-bottom: var(--space-md);
}

ul {
    list-style: none;
}

/* ─── Hero ─── */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(
        180deg,
        var(--bg-dark) 0%,
        var(--bg) 60%,
        var(--bg) 100%
    );
    position: relative;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
        ellipse at 50% 0%,
        rgba(71, 139, 230, 0.08) 0%,
        transparent 60%
    );
    pointer-events: none;
}

.hero-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    position: relative;
    z-index: 1;
}

.logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.02em;
}

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

.nav-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--text);
}

.github-link {
    color: var(--text-muted) !important;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.hero-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: var(--space-lg);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    text-align: center;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: #fff;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

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

/* ─── Demo Section ─── */
.demo-section {
    padding: var(--space-xl) var(--space-lg);
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: center;
}

.demo-terminal {
    width: 100%;
    max-width: 900px;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background-color: var(--bg-dark);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.demo-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.demo-terminal img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* ─── Features ─── */
.features {
    padding: var(--space-xxl) var(--space-lg);
    max-width: var(--max-width);
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.feature-card {
    background-color: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
    color: var(--text);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ─── Philosophy ─── */
.philosophy {
    padding: var(--space-xxl) var(--space-lg);
    background-color: var(--bg-dark);
}

.philosophy-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.philosophy-content > p {
    font-size: 1.1rem;
    margin-bottom: var(--space-lg);
}

.philosophy-list {
    text-align: left;
    display: inline-block;
    margin-bottom: var(--space-lg);
}

.philosophy-list li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
    color: var(--text-muted);
}

.philosophy-list li strong {
    color: var(--text);
}

.philosophy-note {
    font-size: 0.9rem;
    color: var(--text-dim);
    font-style: italic;
    margin-top: var(--space-lg);
}

/* ─── Screenshots ─── */
.screenshots {
    padding: var(--space-xxl) var(--space-lg);
    max-width: var(--max-width);
    margin: 0 auto;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.screenshot-item {
    background-color: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}

.screenshot-link {
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.screenshot-link:hover .screenshot-item {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.screenshot-item {
    transition: border-color 0.2s ease, transform 0.2s ease;
}

/* ─── Lightbox ─── */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-lg);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.lightbox-overlay:target {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-overlay img {
    max-width: 95%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-lg);
    font-size: 2.5rem;
    color: var(--text);
    text-decoration: none;
    line-height: 1;
    transition: color 0.2s ease;
}

.lightbox-close:hover {
    color: var(--accent);
}

.screenshot-caption {
    padding: var(--space-md);
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
    text-align: center;
}

/* ─── Installation ─── */
.install {
    padding: var(--space-xxl) var(--space-lg);
    background-color: var(--bg-dark);
}

.install-content {
    max-width: 700px;
    margin: 0 auto;
}

.install-step {
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
}

.install-step h3 {
    margin-bottom: var(--space-md);
    color: var(--accent);
}

.install-step ul {
    list-style: disc;
    padding-left: var(--space-lg);
    color: var(--text-muted);
}

.install-step li {
    margin-bottom: var(--space-xs);
}

.install-step pre {
    background-color: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--space-md);
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.5;
}

.install-step code {
    font-family: "JetBrains Mono", "Fira Code", "Cascadia Code",
        "Source Code Pro", monospace;
    color: var(--text);
}

/* ─── Footer ─── */
.footer {
    border-top: 1px solid var(--border);
    padding: var(--space-xl) var(--space-lg);
    background-color: var(--bg);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-left .logo {
    margin-bottom: var(--space-xs);
}

.footer-left p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0;
}

.footer-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-sm);
}

.footer-right a {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--text-muted);
    font-weight: 500;
}

.footer-right a:hover {
    color: var(--text);
}

.github-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.github-icon svg {
    width: 24px;
    height: 24px;
}

.license {
    color: var(--text-dim);
    font-size: 0.8rem;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    :root {
        --space-xxl: 4rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    .hero-nav {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
    }

    .btn {
        width: 100%;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-right {
        align-items: center;
    }
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-dim);
}