/* ============================================
   Goder.io -- Custom CSS
   Modern dark theme with terminal accents
   ============================================ */

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

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2128;
    --bg-card: #161b22;
    --border-default: #30363d;
    --border-muted: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-green: #3fb950;
    --accent-green-dim: rgba(63, 185, 80, 0.15);
    --accent-green-glow: rgba(63, 185, 80, 0.25);
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'SF Mono', 'Consolas', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    --max-width: 960px;
    --radius: 8px;
    --radius-lg: 12px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    min-height: 100vh;
}

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

a:hover {
    opacity: 0.8;
}

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

/* --- Container --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- Navbar --- */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
    border-bottom: 1px solid var(--border-default);
}

.navbar-brand {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.navbar-brand:hover {
    color: var(--accent-green);
    opacity: 1;
}

.navbar-links {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.navbar-links a {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius);
    transition: color 0.2s, background-color 0.2s;
}

.navbar-links a:hover {
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    opacity: 1;
}

.navbar-links .prompt {
    color: var(--text-muted);
    user-select: none;
}

/* --- Section spacing --- */
.section {
    padding: 5rem 0;
}

.section--alt {
    background-color: var(--bg-secondary);
}

/* --- Hero --- */
.hero {
    padding: 6rem 0 4rem;
    text-align: center;
}

.hero-title {
    font-family: var(--font-mono);
    font-size: 4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.5;
}

.hero-subtitle .cursor {
    display: inline-block;
    width: 0.6em;
    height: 1.15em;
    background-color: var(--accent-green);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.7rem 1.5rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

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

.btn--primary:hover {
    background-color: #2ea043;
    border-color: #2ea043;
    opacity: 1;
}

.btn--ghost {
    background-color: transparent;
    color: var(--text-secondary);
    border-color: var(--border-default);
}

.btn--ghost:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    opacity: 1;
}

/* --- Terminal Window --- */
.terminal {
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--bg-tertiary);
}

.terminal-titlebar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-default);
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot--red { background-color: #ff5f57; }
.terminal-dot--yellow { background-color: #febc2e; }
.terminal-dot--green { background-color: #28c840; }

.terminal-title {
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    padding-right: 3rem; /* offset for dots to visually center */
}

.terminal-body {
    padding: 1.25rem 1.5rem;
}

.terminal-body img {
    width: 100%;
}

/* --- Screenshot section --- */
.screenshot-section {
    padding: 3rem 0 5rem;
    background-color: var(--bg-primary);
}

/* --- Section Headings --- */
.section-heading {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.section-heading .accent {
    color: var(--accent-green);
}

/* --- Feature Cards --- */
.features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.feature-card {
    padding: 1.5rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    transition: border-color 0.2s, box-shadow 0.3s;
}

.feature-card:hover {
    border-color: var(--accent-green);
    box-shadow: 0 0 20px var(--accent-green-dim);
}

.feature-card--wide {
    grid-column: 1 / -1;
}

.feature-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-green);
    background-color: var(--accent-green-dim);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    margin-bottom: 0.75rem;
    letter-spacing: 0.02em;
}

.feature-title {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Install Code Block --- */
.install-code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 2;
    padding: 1.25rem 1.5rem;
    color: var(--text-primary);
}

.install-code .prompt {
    color: var(--accent-green);
    user-select: none;
}

.install-code .comment {
    color: var(--text-muted);
}

.install-code .line {
    display: block;
}

.install-prereq {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.install-prereq code {
    font-family: var(--font-mono);
    background-color: var(--accent-green-dim);
    color: var(--accent-green);
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* --- Footer --- */
.footer {
    padding: 2.5rem 0;
    text-align: center;
    border-top: 1px solid var(--border-default);
    color: var(--text-muted);
    font-size: 0.85rem;
}

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

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

/* --- Responsive --- */
@media (max-width: 768px) {
    .hero {
        padding: 4rem 0 3rem;
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .section {
        padding: 3.5rem 0;
    }

    .section-heading {
        font-size: 1.5rem;
    }

    .navbar {
        padding: 0.75rem 1rem;
    }

    .navbar-links a {
        padding: 0.3rem 0.5rem;
        font-size: 0.8rem;
    }

    .terminal-title {
        display: none;
    }

    .terminal-titlebar {
        padding: 0.6rem 0.75rem;
    }

    .install-code {
        font-size: 0.8rem;
        padding: 1rem;
        overflow-x: auto;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}