/* ============================================================
 * layout.css — Struktur, Navigation, Footer, Responsive
 * ============================================================
 * Alles was die Seite zusammenhält. Keine Komponenten-Details.
 * ============================================================ */

/* ---- Container ---- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    position: relative;
    z-index: 1;
}

section {
    padding: var(--space-4xl) 0;
}

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

/* ---- Grids ---- */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
}

.split-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

/* ---- Mode Toggle ---- */
.mode-toggle-wrap {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 40px;
    padding: 6px 16px 6px 6px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
}

.mode-toggle-wrap:hover {
    box-shadow: var(--shadow-lg);
}

.mode-toggle {
    position: relative;
    width: 52px;
    height: 28px;
    background: var(--border);
    border-radius: 14px;
    cursor: pointer;
    transition: background var(--transition);
    border: none;
    outline: none;
    -webkit-appearance: none;
}

.mode-toggle::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background: var(--bg-card);
    border-radius: 50%;
    transition: transform var(--transition), background var(--transition);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

[data-mode="coder"] .mode-toggle {
    background: var(--accent);
}

[data-mode="coder"] .mode-toggle::after {
    transform: translateX(24px);
    background: var(--bg-primary);
}

.mode-label {
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    user-select: none;
    letter-spacing: 0.02em;
    transition: color var(--transition);
}

/* ---- Navigation ---- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 900;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    padding: 0 var(--space-lg);
    transition: all var(--transition);
    opacity: 0.97;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-height);
}

.nav-brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition);
}

.nav-links {
    display: flex;
    gap: 28px;
    list-style: none;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition);
    letter-spacing: 0.01em;
}

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

/* Mobile Menu Toggle */
.nav-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    color: var(--text-primary);
}

.nav-menu-btn svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
}

/* ---- Hero ---- */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding-top: calc(var(--nav-height) + 40px);
}

.hero-content {
    max-width: 720px;
}

.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--accent);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 20px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.2s;
}

[data-mode="coder"] .hero-eyebrow::before {
    content: '$ ';
    color: var(--text-muted);
}

.hero h1 {
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.4s;
}

.hero-text {
    font-size: 19px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 36px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.6s;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.8s;
}

/* ---- Coder-Only Sections ---- */
.coder-only {
    display: none;
}

[data-mode="coder"] .coder-only {
    display: block;
}

/* ---- Footer ---- */
.footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
    text-align: center;
    transition: border-color var(--transition);
}

.footer-brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.footer-sub {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin: var(--space-md) 0;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition);
}

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

.footer-legal {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: var(--space-md);
}

.footer-legal a {
    color: var(--text-muted);
    text-decoration: underline;
}

.footer-easter {
    display: inline-block;
    cursor: default;
    user-select: none;
}

/* ---- App Page Layout ---- */
.page-hero {
    padding-top: calc(var(--nav-height) + 60px);
    padding-bottom: var(--space-3xl);
}

.page-hero-inner {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xl);
}

.page-hero-icon {
    width: 96px;
    height: 96px;
    border-radius: 22px;
    flex-shrink: 0;
    overflow: hidden;
}

.page-hero-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.breadcrumb {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

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

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

/* ============================================================
 * RESPONSIVE
 * ============================================================ */

@media (max-width: 768px) {
    /* Nav */
    .nav-links { display: none; }
    .nav-links.open { 
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border);
        padding: var(--space-md) var(--space-lg);
        gap: var(--space-md);
    }
    .nav-menu-btn { display: block; }

    /* Toggle */
    .mode-toggle-wrap {
        top: 14px;
        right: 14px;
        padding: 4px 12px 4px 4px;
    }

    /* Hero */
    .hero { min-height: 80vh; padding-top: calc(var(--nav-height) + 20px); }

    /* Grids */
    .split-grid { grid-template-columns: 1fr; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }

    /* Sections */
    section { padding: 60px 0; }

    /* Page Hero */
    .page-hero-inner { flex-direction: column; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.8rem; }
    .hero-text { font-size: 16px; }
    .hero-cta { flex-direction: column; }
    .hero-cta .btn { width: 100%; justify-content: center; }
    .container { padding: 0 var(--space-md); }
}