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

:root {
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #1a1a1d;
    --bg-card: #16161a;
    --bg-hover: #1f1f24;

    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    --accent-primary: #22c55e;
    --accent-secondary: #10b981;
    --accent-glow: rgba(34, 197, 94, 0.4);

    --gradient-start: #22c55e;
    --gradient-mid: #10b981;
    --gradient-end: #06b6d4;

    --border-color: #27272a;
    --border-hover: #3f3f46;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --font-sans:
        "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Consolas, monospace;

    --shadow-glow: 0 0 60px rgba(34, 197, 94, 0.15);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Gradient Background */
.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 100vh;
    background:
        radial-gradient(
            ellipse 80% 50% at 50% -20%,
            rgba(34, 197, 94, 0.15),
            transparent
        ),
        radial-gradient(
            ellipse 60% 40% at 80% 60%,
            rgba(6, 182, 212, 0.08),
            transparent
        ),
        radial-gradient(
            ellipse 50% 30% at 20% 80%,
            rgba(16, 185, 129, 0.1),
            transparent
        );
    pointer-events: none;
    z-index: -1;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    transition: opacity 0.2s;
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

.github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.github-link:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding-top: 6rem;
    padding-bottom: 4rem;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.9rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(
        135deg,
        var(--gradient-start),
        var(--gradient-mid),
        var(--gradient-end)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(
        135deg,
        var(--accent-primary),
        var(--accent-secondary)
    );
    color: #000;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 80px rgba(34, 197, 94, 0.25);
}

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

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

.btn-icon {
    font-size: 1.1rem;
}

/* Section Titles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    letter-spacing: -0.01em;
}

/* Terminal Preview Section */
.preview {
    padding: 6rem 0;
}

.terminal-window {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card), var(--shadow-glow);
    max-width: 800px;
    margin: 0 auto 3rem;
}

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

.terminal-buttons {
    display: flex;
    gap: 0.5rem;
}

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

.terminal-btn.red {
    background: #ff5f57;
}
.terminal-btn.yellow {
    background: #ffbd2e;
}
.terminal-btn.green {
    background: #28ca41;
}

.terminal-title {
    flex: 1;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.terminal-body {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.8;
}

.terminal-line {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.terminal-line.output {
    padding-left: 0;
    color: var(--text-secondary);
}

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

.prompt {
    color: var(--accent-primary);
}

.command {
    color: var(--text-muted);
}

.typing {
    color: var(--text-primary);
}

.success {
    color: var(--accent-primary);
}

.info {
    margin-right: 0.25rem;
}

.terminal-spacer {
    height: 1rem;
}

.terminal-inbox {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-top: 0.5rem;
}

/* TUI Preview Styles */
.tui-badge {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    background: var(--accent-primary);
    color: #000;
    font-weight: 700;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
}

.tui-prompt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.tui-menu {
    margin-bottom: 2rem;
    padding-left: 0.5rem;
}

.tui-menu-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    line-height: 1.8;
    font-size: 0.95rem;
}

.tui-cursor {
    color: #ff79c6;
    font-weight: 700;
}

.tui-cursor-space {
    width: 0.6rem;
    display: inline-block;
}

.tui-option {
    color: var(--text-primary);
}

.tui-option.selected {
    color: #ff79c6;
}

.tui-hint {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.tui-key {
    color: var(--text-secondary);
}

.preview-image-container {
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.preview-image {
    width: 100%;
    height: auto;
    display: block;
}

/* Features Section */
.features {
    padding: 6rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Installation Section */
.installation {
    padding: 6rem 0;
}

.install-methods {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    max-width: 800px;
    margin: 0 auto;
}

.install-method h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.install-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.install-badge {
    padding: 0.3rem 0.8rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 50px;
    position: relative;
    top: -13px;
}

.install-badge.recommended {
    background: rgba(34, 197, 94, 0.15);
    color: var(--accent-primary);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.code-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.code-block.small {
    margin-top: 0.75rem;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.copy-btn {
    padding: 0.3rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-sans);
}

.copy-btn:hover {
    background: var(--accent-primary);
    color: #000;
    border-color: var(--accent-primary);
}

.copy-btn.copied {
    background: var(--accent-primary);
    color: #000;
    border-color: var(--accent-primary);
}

.code-body {
    padding: 1rem 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.code-line {
    display: flex;
    gap: 0.5rem;
    line-height: 2;
}

.code-text {
    color: var(--text-primary);
}

.install-steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.install-step {
    display: flex;
    gap: 1.5rem;
}

.step-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    font-weight: 700;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Usage Section */
.usage {
    padding: 6rem 0;
}

.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 4rem;
}

.usage-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-align: center;
    transition: all 0.2s;
}

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

.usage-keys {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 0 var(--border-color);
}

.or,
.plus {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.usage-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.usage-card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.providers {
    text-align: center;
}

.providers h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.provider-list {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.provider {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-weight: 500;
}

.provider.coming-soon {
    color: var(--text-muted);
    border-style: dashed;
}

.provider-icon {
    font-size: 1.25rem;
}

/* Contact Section */
.contact {
    padding: 6rem 0;
}

.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.contact p {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

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

.contact a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.support-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.support-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary) !important;
    text-decoration: none !important;
    font-weight: 500;
    transition: all 0.2s;
}

.support-link:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

.copyright {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badges,
.hero-title,
.hero-subtitle,
.hero-cta {
    animation: fadeInUp 0.6s ease-out backwards;
}

.hero-badges {
    animation-delay: 0.1s;
}
.hero-title {
    animation-delay: 0.2s;
}
.hero-subtitle {
    animation-delay: 0.3s;
}
.hero-cta {
    animation-delay: 0.4s;
}

/* Responsive */
@media (max-width: 768px) {
    nav {
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links a:not(.github-link) {
        display: none;
    }

    .hero {
        padding-top: 8rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .terminal-body {
        font-size: 0.8rem;
        padding: 1rem;
    }

    .inbox-item {
        grid-template-columns: 80px 1fr;
    }

    .inbox-time {
        display: none;
    }

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

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

    .install-step {
        flex-direction: column;
        gap: 1rem;
    }

    .step-number {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }

    footer {
        padding: 2rem 1rem;
    }

    .footer-links {
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

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

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

    .provider-list {
        flex-direction: column;
        align-items: center;
    }
}