/* =============================================
   oi.gg – Stylesheet
   Alle Farben und Abstände als CSS-Variablen
   für einfache Anpassung
   ============================================= */

:root {
    /* Farben (leicht anpassbar) */
    --color-bg:          #0a0a0f;
    --color-bg-alt:      #111118;
    --color-bg-card:     #16161f;
    --color-bg-card-hover: #1c1c28;
    --color-surface:     #1e1e2a;
    --color-border:      rgba(255,255,255,0.08);
    --color-border-hover:rgba(255,255,255,0.15);

    --color-text:        #e8e8f0;
    --color-text-muted:  #8888a0;
    --color-text-subtle: #5a5a70;

    --color-primary:     #6366f1;
    --color-primary-hover:#818cf8;
    --color-primary-glow: rgba(99,102,241,0.25);
    --color-accent:      #22d3ee;
    --color-accent-glow: rgba(34,211,238,0.15);

    --color-success:     #22c55e;
    --color-warning:     #f59e0b;
    --color-error:       #ef4444;

    /* Typografie */
    --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-size-xs:   0.75rem;
    --font-size-sm:   0.875rem;
    --font-size-base: 1rem;
    --font-size-lg:   1.125rem;
    --font-size-xl:   1.25rem;
    --font-size-2xl:  1.5rem;
    --font-size-3xl:  2rem;
    --font-size-4xl:  2.5rem;
    --font-size-5xl:  3.5rem;

    /* Abstände */
    --space-xs:  0.25rem;
    --space-sm:  0.5rem;
    --space-md:  1rem;
    --space-lg:  1.5rem;
    --space-xl:  2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Radien */
    --radius-sm:  0.375rem;
    --radius-md:  0.75rem;
    --radius-lg:  1rem;
    --radius-xl:  1.5rem;
    --radius-full:9999px;

    /* Schatten */
    --shadow-sm:  0 1px 2px rgba(0,0,0,0.3);
    --shadow-md:  0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg:  0 8px 30px rgba(0,0,0,0.5);
    --shadow-glow:0 0 40px var(--color-primary-glow);

    /* Transition */
    --transition: 0.2s ease;

    /* Safe Area */
    --safe-top:    env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left:   env(safe-area-inset-left, 0px);
    --safe-right:  env(safe-area-inset-right, 0px);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 16px; }
body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
}
a { color: var(--color-primary-hover); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }
a:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* Skip Link (Barrierefreiheit) */
.skip-link {
    position: absolute; top: -100%; left: var(--space-md);
    background: var(--color-primary); color: #fff;
    padding: var(--space-sm) var(--space-md); border-radius: var(--radius-sm);
    z-index: 10000; font-size: var(--font-size-sm);
}
.skip-link:focus { top: var(--space-md); }

/* =============================================
   HEADER / NAVIGATION
   ============================================= */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(10,10,15,0.85);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--safe-top) var(--safe-right) 0 var(--safe-left);
}
.nav-container {
    max-width: 1200px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
}
.nav-logo { display: flex; align-items: center; text-decoration: none; }
.logo-text { font-size: var(--font-size-2xl); font-weight: 800; color: var(--color-text); letter-spacing: -0.02em; }
.logo-dot { color: var(--color-primary); }
.nav-links { display: flex; gap: var(--space-xl); align-items: center; }
.nav-links a { color: var(--color-text-muted); font-size: var(--font-size-sm); font-weight: 500; transition: color var(--transition); }
.nav-links a:hover { color: var(--color-text); }
.nav-cta {
    background: var(--color-primary) !important; color: #fff !important;
    padding: var(--space-sm) var(--space-lg) !important;
    border-radius: var(--radius-full) !important;
    font-weight: 600 !important;
}
.nav-cta:hover { background: var(--color-primary-hover) !important; }

/* Mobile Nav Toggle */
.nav-toggle {
    display: none; background: none; border: none; cursor: pointer;
    width: 44px; height: 44px; position: relative;
    flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.nav-toggle span {
    display: block; width: 22px; height: 2px; background: var(--color-text);
    border-radius: 2px; transition: all var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* =============================================
   BUTTONS
   ============================================= */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    font-family: var(--font-family); font-weight: 600;
    border: none; border-radius: var(--radius-full); cursor: pointer;
    transition: all var(--transition); text-decoration: none;
    min-height: 44px; min-width: 44px;
}
.btn-sm { padding: var(--space-sm) var(--space-lg); font-size: var(--font-size-sm); }
.btn-lg { padding: var(--space-md) var(--space-2xl); font-size: var(--font-size-base); }
.btn-primary {
    background: var(--color-primary); color: #fff;
    box-shadow: 0 4px 15px var(--color-primary-glow);
}
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: 0 6px 25px var(--color-primary-glow); color: #fff; }
.btn-outline {
    background: transparent; color: var(--color-text);
    border: 1px solid var(--color-border-hover);
}
.btn-outline:hover { border-color: var(--color-text-muted); background: rgba(255,255,255,0.05); color: var(--color-text); }

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
    position: relative; overflow: hidden;
    padding: calc(120px + var(--safe-top)) var(--space-lg) var(--space-4xl);
    min-height: 90vh; display: flex; align-items: center;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-gradient {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, var(--color-primary-glow), transparent),
        radial-gradient(ellipse 60% 40% at 80% 50%, var(--color-accent-glow), transparent);
}
.hero-particles {
    position: absolute; inset: 0;
    background-image:
        radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.15), transparent),
        radial-gradient(1px 1px at 30% 60%, rgba(255,255,255,0.1), transparent),
        radial-gradient(1px 1px at 60% 30%, rgba(255,255,255,0.12), transparent),
        radial-gradient(1px 1px at 80% 70%, rgba(255,255,255,0.08), transparent),
        radial-gradient(1.5px 1.5px at 50% 50%, rgba(99,102,241,0.2), transparent);
}
.hero-container { position: relative; z-index: 1; max-width: 900px; margin: 0 auto; text-align: center; }
.hero-badge {
    display: inline-block;
    background: rgba(99,102,241,0.15); color: var(--color-primary-hover);
    padding: var(--space-xs) var(--space-lg); border-radius: var(--radius-full);
    font-size: var(--font-size-sm); font-weight: 600; letter-spacing: 0.05em;
    border: 1px solid rgba(99,102,241,0.2); margin-bottom: var(--space-xl);
}
.hero-title {
    font-size: clamp(2.5rem, 6vw, var(--font-size-5xl));
    font-weight: 800; line-height: 1.1;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-muted) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-lg);
}
.hero-subtitle {
    font-size: clamp(1rem, 2vw, var(--font-size-xl));
    color: var(--color-text-muted); max-width: 600px; margin: 0 auto var(--space-2xl);
    line-height: 1.7;
}
.hero-actions { display: flex; gap: var(--space-md); justify-content: center; flex-wrap: wrap; margin-bottom: var(--space-3xl); }

/* Demo Bar */
.demo-bar {
    display: inline-flex; align-items: center; gap: 0;
    background: var(--color-bg-card); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: var(--space-md) var(--space-xl);
    font-family: "SF Mono", "Fira Code", monospace; font-size: var(--font-size-sm);
    overflow: hidden; flex-wrap: wrap; justify-content: center;
}
.demo-protocol { color: var(--color-text-subtle); }
.demo-domain { color: var(--color-accent); font-weight: 700; }
.demo-slash { color: var(--color-text-subtle); }
.demo-code { color: var(--color-primary-hover); font-weight: 600; }
.demo-arrow { color: var(--color-text-subtle); margin: 0 var(--space-md); }
.demo-target { color: var(--color-text-muted); font-size: var(--font-size-xs); }

/* =============================================
   SECTIONS (Allgemein)
   ============================================= */
.section-container { max-width: 1200px; margin: 0 auto; padding: var(--space-4xl) var(--space-lg); }
.section-header { text-align: center; margin-bottom: var(--space-3xl); }
.section-badge {
    display: inline-block;
    background: rgba(99,102,241,0.1); color: var(--color-primary-hover);
    padding: var(--space-xs) var(--space-md); border-radius: var(--radius-full);
    font-size: var(--font-size-xs); font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
    margin-bottom: var(--space-md);
}
.section-title {
    font-size: clamp(1.75rem, 4vw, var(--font-size-4xl));
    font-weight: 700; letter-spacing: -0.02em; margin-bottom: var(--space-md);
}
.section-subtitle { color: var(--color-text-muted); font-size: var(--font-size-lg); max-width: 600px; margin: 0 auto; }

/* =============================================
   FEATURES
   ============================================= */
.features { background: var(--color-bg-alt); }
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-xl);
}
.feature-card {
    background: var(--color-bg-card); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: var(--space-2xl);
    transition: all var(--transition);
}
.feature-card:hover {
    border-color: var(--color-border-hover);
    background: var(--color-bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.feature-icon {
    width: 48px; height: 48px; margin-bottom: var(--space-lg);
    color: var(--color-primary-hover);
}
.feature-icon svg { width: 100%; height: 100%; }
.feature-title { font-size: var(--font-size-xl); font-weight: 600; margin-bottom: var(--space-sm); }
.feature-text { color: var(--color-text-muted); font-size: var(--font-size-sm); line-height: 1.7; }

/* =============================================
   HOW IT WORKS
   ============================================= */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    counter-reset: step;
}
.step-card {
    text-align: center; padding: var(--space-2xl);
    position: relative;
}
.step-number {
    font-size: var(--font-size-5xl); font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; line-height: 1; margin-bottom: var(--space-md);
    opacity: 0.6;
}
.step-title { font-size: var(--font-size-xl); font-weight: 600; margin-bottom: var(--space-sm); }
.step-text { color: var(--color-text-muted); font-size: var(--font-size-sm); line-height: 1.7; }

/* =============================================
   CTA SECTION
   ============================================= */
.cta-section { padding-bottom: var(--space-4xl); }
.cta-card {
    background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(34,211,238,0.05));
    border: 1px solid rgba(99,102,241,0.2);
    border-radius: var(--radius-xl); padding: var(--space-4xl) var(--space-2xl);
    text-align: center;
}
.cta-title { font-size: clamp(1.5rem, 3vw, var(--font-size-3xl)); font-weight: 700; margin-bottom: var(--space-md); }
.cta-text { color: var(--color-text-muted); font-size: var(--font-size-lg); margin-bottom: var(--space-2xl); max-width: 500px; margin-left: auto; margin-right: auto; }

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-alt);
    padding-bottom: var(--safe-bottom);
}
.footer-container { max-width: 1200px; margin: 0 auto; padding: var(--space-3xl) var(--space-lg) var(--space-xl); }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}
.footer-logo { text-decoration: none; display: inline-block; margin-bottom: var(--space-md); }
.footer-tagline { color: var(--color-text-muted); font-size: var(--font-size-sm); margin-bottom: var(--space-sm); }
.footer-company { color: var(--color-text-subtle); font-size: var(--font-size-xs); }
.footer-links-group h3 { font-size: var(--font-size-sm); font-weight: 600; margin-bottom: var(--space-md); color: var(--color-text); }
.footer-links-group ul { display: flex; flex-direction: column; gap: var(--space-sm); }
.footer-links-group a { color: var(--color-text-muted); font-size: var(--font-size-sm); }
.footer-links-group li:not(:has(a)) { color: var(--color-text-muted); font-size: var(--font-size-sm); }
.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-lg);
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-md);
}
.footer-bottom p { color: var(--color-text-subtle); font-size: var(--font-size-xs); }
.footer-legal-links a { color: var(--color-text-subtle); font-size: var(--font-size-xs); }
.footer-legal-links .divider { color: var(--color-text-subtle); margin: 0 var(--space-sm); }

/* =============================================
   COOKIE BANNER
   ============================================= */
.cookie-banner {
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 9999;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-md) var(--space-lg) calc(var(--space-md) + var(--safe-bottom));
    box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
}
.cookie-inner {
    max-width: 1200px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between; gap: var(--space-lg);
    flex-wrap: wrap;
}
.cookie-text h4 { font-size: var(--font-size-sm); font-weight: 600; margin-bottom: var(--space-xs); }
.cookie-text p { color: var(--color-text-muted); font-size: var(--font-size-xs); line-height: 1.5; }
.cookie-text a { color: var(--color-primary-hover); }

/* =============================================
   LEGAL PAGES
   ============================================= */
.legal-page { padding-top: calc(100px + var(--safe-top)); min-height: 80vh; }
.legal-container {
    max-width: 800px; margin: 0 auto; padding: var(--space-2xl) var(--space-lg) var(--space-4xl);
}
.legal-container h1 {
    font-size: var(--font-size-3xl); font-weight: 700; margin-bottom: var(--space-2xl);
    letter-spacing: -0.02em;
}
.legal-container h2 { font-size: var(--font-size-xl); font-weight: 600; margin-top: var(--space-2xl); margin-bottom: var(--space-md); color: var(--color-text); }
.legal-container h3 { font-size: var(--font-size-lg); font-weight: 600; margin-top: var(--space-lg); margin-bottom: var(--space-sm); }
.legal-container p { color: var(--color-text-muted); margin-bottom: var(--space-md); line-height: 1.8; }
.legal-container ul { margin-bottom: var(--space-md); padding-left: var(--space-xl); }
.legal-container li { color: var(--color-text-muted); margin-bottom: var(--space-sm); list-style: disc; line-height: 1.7; }
.legal-container code { background: var(--color-bg-card); padding: 2px 6px; border-radius: var(--radius-sm); font-size: var(--font-size-sm); }
.legal-container strong { color: var(--color-text); }
.legal-back { margin-top: var(--space-2xl); }
.legal-back a { font-weight: 500; }

/* Cookie Table */
.cookie-table { width: 100%; border-collapse: collapse; margin: var(--space-md) 0 var(--space-xl); }
.cookie-table th, .cookie-table td {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    text-align: left; font-size: var(--font-size-sm);
}
.cookie-table th { background: var(--color-bg-card); font-weight: 600; color: var(--color-text); }
.cookie-table td { color: var(--color-text-muted); }

/* =============================================
   ERROR PAGES
   ============================================= */
.error-page {
    padding-top: calc(100px + var(--safe-top)); min-height: 80vh;
    display: flex; align-items: center; justify-content: center;
}
.error-container { text-align: center; padding: var(--space-2xl); }
.error-code {
    font-size: clamp(5rem, 15vw, 10rem); font-weight: 800; line-height: 1;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; opacity: 0.4; margin-bottom: var(--space-md);
}
.error-container h1 { font-size: var(--font-size-2xl); font-weight: 700; margin-bottom: var(--space-md); }
.error-container p { color: var(--color-text-muted); margin-bottom: var(--space-2xl); }

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

/* XS: 320-374px */
@media (max-width: 374px) {
    .hero { padding-top: calc(90px + var(--safe-top)); min-height: 80vh; }
    .hero-title { font-size: 2rem; }
    .demo-bar { font-size: var(--font-size-xs); padding: var(--space-sm) var(--space-md); }
    .demo-target { display: none; }
    .demo-arrow { display: none; }
}

/* S-M: bis 767px (Smartphones) */
@media (max-width: 767px) {
    .nav-links { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(10,10,15,0.98); flex-direction: column;
        justify-content: center; align-items: center; gap: var(--space-2xl);
        z-index: 999;
    }
    .nav-links.active { display: flex; }
    .nav-links a { font-size: var(--font-size-xl); }
    .nav-toggle { display: flex; z-index: 1001; }

    .hero { padding-top: calc(100px + var(--safe-top)); min-height: auto; padding-bottom: var(--space-3xl); }
    .hero-actions { flex-direction: column; align-items: center; }

    .footer-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
    .footer-bottom { flex-direction: column; text-align: center; }

    .cookie-inner { flex-direction: column; text-align: center; }
}

/* L: 768-959px (Foldables, kleine Tablets) */
@media (min-width: 768px) and (max-width: 959px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* XL+: 960px+ (Tablets, Desktop) */
@media (min-width: 960px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: repeat(3, 1fr); }
}

/* UHD/4K: 1920px+ */
@media (min-width: 1920px) {
    html { font-size: 18px; }
    .nav-container, .section-container, .footer-container, .legal-container { max-width: 1400px; }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
    html { scroll-behavior: auto; }
}

/* Print */
@media print {
    .site-header, .cookie-banner, .nav-toggle, .hero-bg { display: none !important; }
    body { background: #fff; color: #000; }
    a { color: #000; text-decoration: underline; }
}