/* ============================================================
 * base.css — Reset, Typografie, Animationen
 * ============================================================
 * Globale Basis-Styles. Keine Komponenten-Logik hier.
 * ============================================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---- Subtle Grain Texture ---- */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.025;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- Typography ---- */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
    transition: color var(--transition);
}

h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.4rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }

p {
    color: var(--text-secondary);
    transition: color var(--transition);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

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

em {
    font-style: italic;
    color: var(--accent);
}

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

/* ---- Selection ---- */
::selection {
    background: var(--accent-soft);
    color: var(--text-primary);
}

/* ---- Mode-Conditional Content ---- */
.desc-human { display: block; }
.desc-coder { display: none; }
[data-mode="coder"] .desc-human { display: none; }
[data-mode="coder"] .desc-coder { display: block; }

/* Inline variants */
.inline-human { display: inline; }
.inline-coder { display: none; }
[data-mode="coder"] .inline-human { display: none; }
[data-mode="coder"] .inline-coder { display: inline; }

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

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Scroll-triggered fade */
.fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered children animation */
.stagger > .fade-in:nth-child(1) { transition-delay: 0.05s; }
.stagger > .fade-in:nth-child(2) { transition-delay: 0.1s; }
.stagger > .fade-in:nth-child(3) { transition-delay: 0.15s; }
.stagger > .fade-in:nth-child(4) { transition-delay: 0.2s; }
.stagger > .fade-in:nth-child(5) { transition-delay: 0.25s; }

/* ---- Focus Styles (Accessibility) ---- */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: var(--radius-xs);
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    .fade-in { opacity: 1; transform: none; }
}