/* ============================================================
   COLLIDEX - Modern SaaS Website Stylesheet
   Dark Theme | Tech/AI Design Language
   ============================================================ */

/* --- CSS Variables --- */
:root {
    --color-bg: #09090b;
    --color-bg-alt: #0f0f12;
    --color-surface: #111114;
    --color-surface-hover: #1a1a1f;
    --color-border: #1e1e25;
    --color-border-light: #2a2a35;

    --color-primary: #1b6db5;
    --color-primary-light: #3a8fd4;
    --color-primary-dark: #145a96;
    --color-secondary: #06b6d4;
    --color-secondary-light: #22d3ee;
    --color-accent: #2196F3;

    --gradient-primary: linear-gradient(135deg, #1b6db5 0%, #06b6d4 100%);
    --gradient-accent: linear-gradient(135deg, #145a96 0%, #1b6db5 50%, #06b6d4 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(27,109,181,0.1) 0%, rgba(6,182,212,0.1) 100%);
    --gradient-text: linear-gradient(135deg, #f1f5f9 0%, #94a3b8 100%);
    --gradient-hero-text: linear-gradient(135deg, #ffffff 0%, #1b6db5 50%, #06b6d4 100%);

    --color-text: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-text-heading: #ffffff;

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

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --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 32px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 40px rgba(27,109,181,0.15);

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    --container-max: 1200px;
    --container-narrow: 800px;
    --section-padding: 120px;
    --header-height: 72px;
}

/* --- Light Mode --- */
[data-theme="light"] {
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-surface: #f1f5f9;
    --color-surface-hover: #e2e8f0;
    --color-border: #e2e8f0;
    --color-border-light: #cbd5e1;

    --color-primary-light: #1567a8;
    --color-secondary-light: #0891b2;

    --gradient-subtle: linear-gradient(135deg, rgba(27,109,181,0.06) 0%, rgba(6,182,212,0.06) 100%);
    --gradient-text: linear-gradient(135deg, #0f172a 0%, #475569 100%);
    --gradient-hero-text: linear-gradient(135deg, #0f172a 0%, #1b6db5 50%, #06b6d4 100%);

    --color-text: #1e293b;
    --color-text-secondary: #475569;
    --color-text-muted: #64748b;
    --color-text-heading: #0f172a;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --shadow-glow: 0 4px 20px rgba(27,109,181,0.1);
}

/* Light mode – element-specific overrides */
[data-theme="light"] .nav.scrolled,
[data-theme="light"] .nav.menu-open {
    background: rgba(255, 255, 255, 0.92);
}

[data-theme="light"] .nav__link:hover,
[data-theme="light"] .nav__link.active {
    background: rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .arch__tag {
    background: rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .nav__logo img,
[data-theme="light"] .footer__brand img {
    filter: brightness(0);
}

@media (max-width: 1100px) {
    [data-theme="light"] .nav__links {
        background: #ffffff;
    }
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

html[lang="de"] {
    hyphens: auto;
    -webkit-hyphens: auto;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-secondary-light);
}

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

ul, ol {
    list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    overflow-wrap: break-word;
    hyphens: auto;
    -webkit-hyphens: auto;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
}

h4 {
    font-size: 1.125rem;
}

p {
    color: var(--color-text-secondary);
    max-width: 640px;
}

.text-gradient {
    background: var(--gradient-hero-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-accent {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.container--narrow {
    max-width: var(--container-narrow);
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section--sm {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-header p {
    margin: 16px auto 0;
    max-width: 600px;
    font-size: 1.125rem;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--gradient-subtle);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
}

.section-badge svg {
    width: 14px;
    height: 14px;
}

/* --- Grid --- */
.grid {
    display: grid;
    gap: 24px;
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .grid--4,
    .grid--3,
    .grid--2 { grid-template-columns: 1fr; }
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    text-decoration: none;
    line-height: 1.4;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn--primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 0 20px rgba(27,109,181,0.3);
}

.btn--primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 30px rgba(27,109,181,0.5);
    color: #fff;
}

.btn--secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border-light);
}

.btn--secondary:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

.btn--ghost {
    background: transparent;
    color: var(--color-text-secondary);
    padding: 8px 16px;
}

.btn--ghost:hover {
    color: var(--color-text);
}

.btn--lg {
    padding: 16px 36px;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.btn-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
    transition: all var(--transition-base);
    border-bottom: 1px solid transparent;
}

.nav.scrolled,
.nav.menu-open {
    background: rgba(9, 9, 11, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom-color: var(--color-border);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-text-heading);
    letter-spacing: -0.02em;
    text-decoration: none;
}

.nav__logo:hover {
    color: var(--color-text-heading);
}

.nav__logo-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav__logo-icon svg {
    width: 20px;
    height: 20px;
    color: #fff;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav__link {
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-text);
    background: rgba(255,255,255,0.05);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav__lang-switcher {
    position: relative;
}

.nav__lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-sans);
    text-transform: uppercase;
    transition: all var(--transition-fast);
}

.nav__lang-btn:hover {
    border-color: var(--color-border-light);
    color: var(--color-text);
}

.nav__lang-btn svg {
    width: 14px;
    height: 14px;
}

.nav__lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 6px;
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-lg);
}

.nav__lang-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav__lang-dropdown a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav__lang-dropdown a:hover,
.nav__lang-dropdown a.active {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

/* More dropdown */
.nav__more {
    position: relative;
}

.nav__more-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
}

.nav__more-btn:hover,
.nav__more-btn.active {
    color: var(--color-text);
    background: rgba(255,255,255,0.05);
}

[data-theme="light"] .nav__more-btn:hover,
[data-theme="light"] .nav__more-btn.active {
    background: rgba(0,0,0,0.05);
}

.nav__more-btn svg {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-fast);
}

.nav__more-btn.open svg {
    transform: rotate(180deg);
}

.nav__more-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 6px;
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
}

.nav__more-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav__more-menu .nav__link {
    display: block;
    width: 100%;
}

/* Mobile menu */
.nav__mobile-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-text);
}

.nav__mobile-toggle svg {
    width: 24px;
    height: 24px;
}

@media (max-width: 1100px) {
    .nav__links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        height: calc(100vh - var(--header-height));
        height: calc(100dvh - var(--header-height));
        z-index: 999;
        flex-direction: column;
        background: var(--color-bg);
        padding: 16px 24px;
        gap: 2px;
        transform: translateX(100%);
        transition: transform var(--transition-base);
        border-top: 1px solid var(--color-border);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nav__links.open {
        transform: translateX(0);
    }

    .nav__link {
        width: 100%;
        padding: 8px 16px;
        font-size: 1rem;
    }

    .nav__mobile-toggle {
        display: flex;
    }

    .nav__actions .btn {
        display: none;
    }

    /* More dropdown: flatten on mobile */
    .nav__more {
        width: 100%;
    }

    .nav__more-btn {
        display: none;
    }

    .nav__more-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: transparent;
        border: none;
        padding: 0;
        box-shadow: none;
        min-width: unset;
    }

    .nav__more-menu .nav__link {
        width: 100%;
        padding: 8px 16px;
        font-size: 1rem;
    }
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--header-height) + 60px) 24px 80px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 800px;
    height: 800px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(27,109,181,0.12) 0%, transparent 70%);
    top: -300px;
    right: -200px;
    animation: heroFloat 25s ease-in-out infinite;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(6,182,212,0.08) 0%, transparent 70%);
    bottom: -200px;
    left: -100px;
    animation: heroFloat 20s ease-in-out infinite reverse;
    pointer-events: none;
}

@keyframes heroFloat {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(30px, -20px); }
    66% { transform: translate(-20px, 20px); }
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: min(900px, 100%);
    overflow-wrap: break-word;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(27,109,181,0.1);
    border: 1px solid rgba(27,109,181,0.2);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary-light);
    margin-bottom: 32px;
    letter-spacing: 0.02em;
}

.hero__title {
    margin-bottom: 24px;
    line-height: 1.1;
    hyphens: auto;
    -webkit-hyphens: auto;
    overflow-wrap: break-word;
}

.hero__subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 640px;
    margin: 0 auto 40px;
    line-height: 1.6;
}

.hero__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Page heroes (not homepage) */
.hero--page {
    min-height: auto;
    padding: calc(var(--header-height) + 80px) 24px 80px;
}

.hero--page .hero__content {
    max-width: 760px;
}

/* Grid background pattern */
.grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(27,109,181,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(27,109,181,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 0%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 0%, transparent 100%);
    pointer-events: none;
}

/* --- Cards --- */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-subtle);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    color: var(--color-primary-light);
}

.card__icon svg {
    width: 24px;
    height: 24px;
}

.card__title {
    font-size: 1.125rem;
    margin-bottom: 10px;
}

.card__text {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.card--feature {
    padding: 40px;
}

.card--highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
}

/* Large feature card */
.card--large {
    padding: 48px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.card--large .card__content {
    order: 1;
}

.card--large .card__visual {
    order: 2;
}

.card--large.card--reverse .card__content {
    order: 2;
}

.card--large.card--reverse .card__visual {
    order: 1;
}

@media (max-width: 768px) {
    .card--large {
        grid-template-columns: 1fr;
        padding: 32px;
    }
    .card--large .card__content,
    .card--large .card__visual,
    .card--large.card--reverse .card__content,
    .card--large.card--reverse .card__visual {
        order: unset;
    }
}

/* --- Stats --- */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--color-border);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.stat {
    background: var(--color-surface);
    padding: 40px 32px;
    text-align: center;
}

.stat__number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text-heading);
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.stat__number .text-gradient-accent {
    font-size: inherit;
    font-weight: inherit;
}

.stat__label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats {
        grid-template-columns: 1fr;
    }
}

/* --- Architecture Visualization --- */
.arch {
    max-width: 800px;
    margin: 0 auto;
}

.arch__layer {
    padding: 28px 32px;
    border: 1px solid var(--color-border);
    text-align: center;
    position: relative;
    transition: all var(--transition-base);
}

.arch__layer:first-child {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.arch__layer:last-child {
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.arch__layer + .arch__layer {
    border-top: none;
}

.arch__layer--app {
    background: rgba(27,109,181,0.08);
    border-color: rgba(27,109,181,0.3);
}

.arch__layer--platform {
    background: rgba(6,182,212,0.06);
    border-color: rgba(6,182,212,0.2);
}

.arch__layer--infra {
    background: rgba(139,92,246,0.05);
    border-color: rgba(139,92,246,0.2);
}

.arch__layer-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: 8px;
    font-weight: 600;
}

.arch__layer-title {
    font-size: 1.125rem;
    font-weight: 700;
}

.arch__layer-items {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 12px;
}

.arch__tag {
    padding: 4px 14px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

/* --- Process Flow --- */
.process-flow {
    display: flex;
    align-items: center;
    gap: 16px;
    overflow-x: auto;
    padding: 24px 0;
}

.process-flow__step {
    flex-shrink: 0;
    padding: 16px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-align: center;
    min-width: 140px;
}

.process-flow__step-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
}

.process-flow__step-sub {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.process-flow__arrow {
    flex-shrink: 0;
    color: var(--color-primary);
    display: flex;
}

.process-flow__arrow svg {
    width: 20px;
    height: 20px;
}

/* --- Feature List --- */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-list__item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.feature-list__item svg {
    width: 20px;
    height: 20px;
    color: var(--color-success);
    flex-shrink: 0;
    margin-top: 2px;
}

/* --- Visual Placeholder --- */
.visual-placeholder {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    position: relative;
    overflow: hidden;
}

.visual-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(27,109,181,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(27,109,181,0.05) 1px, transparent 1px);
    background-size: 24px 24px;
}

.visual-placeholder__content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* --- CTA Section --- */
.cta-section {
    text-align: center;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 50% 80% at 50% 0%, rgba(27,109,181,0.08) 0%, transparent 100%);
    pointer-events: none;
}

.cta-section .container {
    position: relative;
    z-index: 1;
}

.cta-section h2 {
    margin-bottom: 16px;
}

.cta-section p {
    margin: 0 auto 32px;
    font-size: 1.125rem;
}

/* --- Form --- */
.form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 600px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-input,
.form-textarea,
.form-select {
    padding: 12px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    transition: border-color var(--transition-fast);
    outline: none;
    width: 100%;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(27,109,181,0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-muted);
}

.form-textarea {
    min-height: 140px;
    resize: vertical;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-message {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    display: none;
}

.form-message--success {
    display: block;
    background: rgba(34,197,94,0.1);
    border: 1px solid rgba(34,197,94,0.3);
    color: var(--color-success);
}

.form-message--error {
    display: block;
    background: rgba(239,68,68,0.1);
    border: 1px solid rgba(239,68,68,0.3);
    color: var(--color-error);
}

.honeypot {
    position: absolute;
    left: -9999px;
    opacity: 0;
    height: 0;
    width: 0;
    overflow: hidden;
}

/* --- Footer --- */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 80px 0 40px;
    background: var(--color-bg);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 64px;
}

@media (max-width: 1100px) {
    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 480px) {
    .footer__grid {
        grid-template-columns: 1fr;
    }
}

.footer__brand p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 16px;
    max-width: 300px;
}

.footer__col-title {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text);
    margin-bottom: 20px;
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer__links a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-text);
}

.footer__bottom {
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer__copyright {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.footer__bottom-links {
    display: flex;
    gap: 24px;
}

.footer__bottom-links a {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

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

/* --- Scroll Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in-delay-1 { transition-delay: 100ms; }
.fade-in-delay-2 { transition-delay: 200ms; }
.fade-in-delay-3 { transition-delay: 300ms; }
.fade-in-delay-4 { transition-delay: 400ms; }

/* --- Divider --- */
.divider {
    height: 1px;
    background: var(--color-border);
    border: none;
    margin: 0;
}

/* --- Contact Page Layout --- */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

@media (max-width: 768px) {
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-info__item {
    display: flex;
    gap: 16px;
}

.contact-info__icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-subtle);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    color: var(--color-primary-light);
    flex-shrink: 0;
}

.contact-info__icon svg {
    width: 20px;
    height: 20px;
}

.contact-info__label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.contact-info__value {
    font-size: 0.9375rem;
    color: var(--color-text);
}

/* --- Utilities --- */
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mt-64 { margin-top: 64px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }

/* --- Responsive Base --- */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }
}

@media (max-width: 640px) {
    :root {
        --section-padding: 60px;
    }

    .hero {
        padding-top: calc(var(--header-height) + 40px);
        min-height: auto;
        padding-bottom: 60px;
    }

    .card--feature {
        padding: 28px;
    }

    .stat__number {
        font-size: 2rem;
    }

    .hero__canvas {
        opacity: 0.5;
    }
}

/* --- Module Tags / Pills --- */
.module-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.module-tag {
    padding: 6px 14px;
    background: rgba(27,109,181,0.08);
    border: 1px solid rgba(27,109,181,0.15);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--color-primary-light);
    font-weight: 500;
}

/* --- Security badges / Trust --- */
.trust-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

@media (max-width: 640px) {
    .trust-grid {
        grid-template-columns: 1fr;
    }
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.trust-item svg {
    width: 24px;
    height: 24px;
    color: var(--color-success);
    flex-shrink: 0;
}

.trust-item span {
    font-size: 0.9375rem;
    color: var(--color-text);
    font-weight: 500;
}

/* --- Timeline / Steps --- */
.steps {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
}

.step {
    display: flex;
    gap: 24px;
    padding: 32px 0;
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 19px;
    top: 72px;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.step__number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 0.875rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.step__content h3 {
    margin-bottom: 8px;
}

.step__content p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

/* --- Legal Pages (Impressum/Datenschutz) --- */
.card--feature h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

.card--feature h3 {
    font-size: 1.125rem;
    color: var(--color-text-heading);
}

.card--feature p + p {
    margin-top: 12px;
}

/* --- Theme Toggle --- */
.nav__theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.nav__theme-toggle:hover {
    border-color: var(--color-border-light);
    color: var(--color-text);
    background: var(--color-surface-hover);
}

.nav__theme-toggle svg {
    width: 18px;
    height: 18px;
}

/* --- Hero Canvas Background --- */
.hero--home {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero__canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* --- Pillar Card Illustrations --- */
.card__illustration {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-subtle);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
}

.card__illustration::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0.05;
}

.card__illustration svg {
    width: 36px;
    height: 36px;
    color: var(--color-primary-light);
    position: relative;
    z-index: 1;
}

/* --- Architecture Layer Icons --- */
.arch__layer-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 4px;
}

.arch__layer-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.arch__layer-icon svg {
    width: 28px;
    height: 28px;
}

.arch__layer--app .arch__layer-icon {
    color: var(--color-primary-light);
}

.arch__layer--platform .arch__layer-icon {
    color: var(--color-secondary);
}

.arch__layer--infra .arch__layer-icon {
    color: #a78bfa;
}

/* Animated connecting dots between arch layers */
.arch__connector {
    display: flex;
    justify-content: center;
    padding: 4px 0;
}

.arch__connector svg {
    width: 24px;
    height: 16px;
    color: var(--color-text-muted);
}

@keyframes archDotPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

.arch__dot-1 { animation: archDotPulse 2s ease-in-out infinite; }
.arch__dot-2 { animation: archDotPulse 2s ease-in-out infinite 0.3s; }
.arch__dot-3 { animation: archDotPulse 2s ease-in-out infinite 0.6s; }

/* --- Stat Icons --- */
.stat__icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-subtle);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    color: var(--color-primary-light);
}

.stat__icon svg {
    width: 24px;
    height: 24px;
}

/* --- Security Section Background --- */
.security-section {
    position: relative;
    overflow: hidden;
}

.security-section__bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    pointer-events: none;
    opacity: 0.04;
}

[data-theme="light"] .security-section__bg {
    opacity: 0.03;
}

/* --- Logo in Nav --- */
.nav__logo img {
    transition: opacity var(--transition-fast);
}

.nav__logo:hover img {
    opacity: 0.85;
}