/* ===== CSS Custom Properties (Design System) ===== */
:root {
    /* Colors from Heimr logo */
    --bg-primary: #0a192f;
    --bg-secondary: #0d1b2a;
    --bg-card: rgba(13, 27, 42, 0.7);

    /* Gradient colors (cyan to teal from logo) */
    --accent-cyan: #00d9ff;
    --accent-teal: #00ffa3;
    --accent-glow-cyan: rgba(0, 217, 255, 0.3);
    --accent-glow-teal: rgba(0, 255, 163, 0.3);

    /* Text colors */
    --text-primary: #e6f1ff;
    --text-secondary: #8892b0;
    --text-muted: #5a6a8a;

    /* Fonts */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

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

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

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

html {
    scroll-behavior: smooth;
}

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

/* ===== Animated Background ===== */
.bg-gradient {
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow-cyan), transparent),
        radial-gradient(ellipse 60% 40% at 80% 100%, var(--accent-glow-teal), transparent),
        linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    z-index: -2;
}

.circuit-lines {
    position: fixed;
    inset: 0;
    z-index: -1;
    opacity: 0.03;
    background-image:
        linear-gradient(var(--accent-cyan) 1px, transparent 1px),
        linear-gradient(90deg, var(--accent-cyan) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) var(--space-lg);
    background: rgba(10, 25, 47, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(100, 255, 218, 0.1);
    transition: var(--transition-normal);
}

.nav {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--text-primary);
}

.nav-logo-img {
    height: 80px;
    width: 80px;
    object-fit: cover;
    border-radius: 50%;
    clip-path: circle(50%);
    filter: drop-shadow(0 0 12px var(--accent-glow-teal));
    transition: var(--transition-normal);
}

.nav-logo-img:hover {
    filter: drop-shadow(0 0 20px var(--accent-glow-teal));
    transform: scale(1.05);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--accent-teal);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-teal));
    transition: var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link--github {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: rgba(0, 255, 163, 0.1);
    border: 1px solid rgba(0, 255, 163, 0.3);
    border-radius: var(--radius-full);
    color: var(--accent-teal);
}

.nav-link--github:hover {
    background: rgba(0, 255, 163, 0.2);
    border-color: var(--accent-teal);
}

.nav-link--github::after {
    display: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ===== Hero Section - Single Column Centered ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(80px + var(--space-lg)) var(--space-xl) var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.hero-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-lg);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--accent-teal);
    font-weight: 500;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 700px;
}

/* ===== Tools Section ===== */
.tools-section {
    width: 100%;
    margin: var(--space-lg) 0;
}

.tools-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.tools-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
}

.tool-badge {
    padding: var(--space-sm) var(--space-md);
    background: rgba(0, 255, 163, 0.1);
    border: 1px solid rgba(0, 255, 163, 0.3);
    border-radius: var(--radius-full);
    color: var(--accent-teal);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.tool-badge:hover {
    background: rgba(0, 255, 163, 0.2);
    border-color: var(--accent-teal);
    transform: translateY(-2px);
}

.coming-soon {
    margin-top: var(--space-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
    opacity: 0.8;
}

/* ===== Feature Cards Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
    width: 100%;
    margin-top: var(--space-xl);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid rgba(100, 255, 218, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    backdrop-filter: blur(10px);
    text-align: left;
    transition: var(--transition-normal);
}

.feature-card:hover {
    border-color: rgba(0, 255, 163, 0.4);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px var(--accent-glow-teal);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: var(--space-sm);
    font-weight: 600;
}

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

/* ===== Install Section ===== */
.install-section {
    margin: var(--space-md) 0;
}

.install-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.install-box {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(100, 255, 218, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    backdrop-filter: blur(10px);
}

.install-command {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--accent-teal);
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: rgba(0, 255, 163, 0.1);
    border: 1px solid rgba(0, 255, 163, 0.3);
    border-radius: var(--radius-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--accent-teal);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.copy-btn:hover {
    background: rgba(0, 255, 163, 0.2);
    border-color: var(--accent-teal);
}

.copy-btn.copied {
    background: var(--accent-teal);
    color: var(--bg-primary);
}

/* ===== Buttons ===== */
.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-top: var(--space-md);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    cursor: pointer;
}

.btn--primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
    color: var(--bg-primary);
    border: none;
    box-shadow: 0 4px 20px var(--accent-glow-teal);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow-teal);
}

.btn--secondary {
    background: transparent;
    color: var(--accent-teal);
    border: 2px solid var(--accent-teal);
}

.btn--secondary:hover {
    background: rgba(0, 255, 163, 0.1);
    transform: translateY(-2px);
}

/* ===== Example Section ===== */
.example-section {
    padding: var(--space-xl) var(--space-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.example-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    font-size: 1rem;
}

.demo-link {
    margin-top: var(--space-lg);
    text-align: center;
}

.code-block {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(100, 255, 218, 0.15);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    overflow-x: auto;
}

.code-block pre {
    margin: 0;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    white-space: pre-wrap;
}

/* ===== Footer ===== */
.footer {
    padding: var(--space-xl) var(--space-lg) var(--space-lg);
    border-top: 1px solid rgba(100, 255, 218, 0.1);
    margin-top: var(--space-xl);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.footer-tagline {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--accent-teal);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(100, 255, 218, 0.05);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== Mobile Responsive ===== */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: calc(80px + var(--space-lg)) var(--space-lg) var(--space-lg);
    }

    .hero-left {
        order: -1;
    }

    .hero-logo-img {
        max-width: 400px;
    }

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

    .hero-actions {
        justify-content: center;
    }

    .install-box {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 25, 47, 0.98);
        padding: var(--space-lg);
        border-bottom: 1px solid rgba(100, 255, 218, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-logo-img {
        max-width: 300px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .example-section {
        padding: var(--space-lg);
    }

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