:root {
    --bg-color: #0f172a;
    --text-color: #e2e8f0;
    --accent-color: #34d399;
    --header-bg: #0f172a;
    --footer-bg: #0f172a;
    --card-bg: #1e293b;
    --card-border: #34d399;
    --terminal-bg: #0f172a;
    --terminal-text: #e2e8f0;
    --badge-bg: #34d39920; /* 20% opacity */
    --badge-text: #34d399;
    --button-primary-bg: var(--accent-color);
    --button-primary-text: #000;
    --button-secondary-bg: transparent;
    --button-secondary-text: var(--text-color);
    --button-secondary-border: var(--accent-color);
    --input-bg: #1e293b;
    --input-text: #e2e8f0;
}

/* Make sure we use the tokens for spacing and radius */
:root {
    --radius-button: 9999px;
    --radius-card: 12px;
    --radius-window: 12px;
    --shadow-panel: 0 0 40px rgba(52, 211, 153, 0.15), 0 0 80px rgba(52, 211, 153, 0.05);
    --spacing-section: 96px;
    --spacing-card: 24px;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, "Segoe UI", sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    background-image: 
        linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 20px 20px;
    color-scheme: dark;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--bg-color);
    color: var(--text-color);
    padding: 8px;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

header {
    background-color: var(--header-bg);
    padding: 1rem 0;
    border-bottom: 1px solid var(--card-border);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

header .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

header .logo-square {
    width: 32px;
    height: 32px;
    background: var(--accent-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: #000;
    font-size: 1.2rem;
}

header .logo-text {
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 1.8rem;
    margin: 0;
    letter-spacing: -0.02em;
    color: var(--text-color);
}

header nav ul {
    display: flex;
    gap: 1rem;
    list-style: none;
}

header nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
}

header nav a:hover {
    text-decoration: underline;
}

header .star-button {
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-button);
    cursor: pointer;
    font-weight: 600;
}

header .star-button:hover {
    opacity: 0.9;
}

main {
    padding: 2rem 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero .badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    background: var(--badge-bg);
    color: var(--badge-text);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.hero .badge .dot {
    width: 6px;
    height: 6px;
    background: var(--accent-color);
    border-radius: 50%;
}

.hero h2 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0 0 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0;
    line-height: 1;
}

.hero h2 span {
    display: block;
}

.hero h2 span:first-child {
    color: var(--text-color);
}

.hero h2 span.accent {
    color: var(--accent-color);
}

.hero p {
    color: var(--text-color);
    max-width: 600px;
    margin: 0 auto 2rem;
    font-size: 1.125rem;
}

.button-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.button-primary,
.button-secondary {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-button);
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    border: none;
    transition: opacity 0.2s;
}

.button-primary {
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
}

.button-primary:hover {
    opacity: 0.9;
}

.button-secondary {
    background: var(--button-secondary-bg);
    color: var(--button-secondary-text);
    border: 2px solid var(--button-secondary-border);
}

.button-secondary:hover {
    background: rgba(95, 199, 146, 0.1);
}

.instruction-block {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-card);
    padding: 2rem;
    margin: 2rem auto;
    max-width: 600px;
    position: relative;
}

.instruction-block .label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.instruction-block pre {
    background: none;
    padding: 0;
    margin: 0 0 1rem;
    overflow-x: auto;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--terminal-text);
}

.instruction-block code {
    display: block;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--terminal-text);
}

#copy-button {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
}

#copy-button:hover {
    opacity: 0.9;
}

#copy-feedback {
    position: absolute;
    top: 100%;
    left: 1rem;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    min-height: 1.2em;
    color: var(--accent-color);
}

.terminal-window {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-window);
    padding: 2rem;
    margin: 2rem auto;
    max-width: 800px;
}

.terminal-window h3 {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.terminal-window .note {
    font-size: 0.875rem;
    color: #888;
    margin-left: 0.5rem;
}

.terminal {
    background: var(--terminal-bg);
    color: var(--terminal-text);
    border-radius: var(--radius-window);
    overflow: hidden;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.terminal-controls {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem;
    background: #000;
}

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

.terminal-controls .control.red { background: #ef4444; }
.terminal-controls .control.yellow { background: #eab308; }
.terminal-controls .control.green { background: #22c55e; }

.terminal-body {
    padding: 1rem;
    background: var(--terminal-bg);
}

.terminal-body pre {
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.4;
}

.how-it-works,
.why-it-exists,
.rules-example,
.for-developers {
    padding: 2rem 0;
}

.how-it-works h2,
.why-it-exists h2,
.rules-example h2,
.for-developers h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-color);
    text-align: center;
}

.cards {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-card);
    padding: 1.5rem;
}

.card h3 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.card p {
    color: var(--text-color);
    line-height: 1.5;
}

footer {
    background: var(--footer-bg);
    color: #888;
    text-align: center;
    padding: 2rem 0;
    font-size: 0.875rem;
    border-top: 1px solid var(--card-border);
}

footer a {
    color: #888;
    text-decoration: underline;
}

footer a:hover {
    text-decoration: none;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Optional light theme - we are not implementing it, but we can set color-scheme */
:root {
    color-scheme: dark;
}