/* ==========================================
   CORS GmbH - Dark Theme with Red Accents
   Production-Optimized Frontend Implementation
   ========================================== */

:root {
    /* Colors - Dark Theme */
    --color-bg-dark: #0a0a0a;
    --color-bg-darker: #050505;
    --color-bg-card: #141414;
    --color-bg-elevated: #1a1a1a;
    
    /* Brand Colors */
    --color-primary: #DC2626;
    --color-primary-dark: #B91C1C;
    --color-primary-light: #EF4444;
    
    /* Text Colors */
    --color-text-primary: #FAFAFA;
    --color-text-secondary: #A3A3A3;
    --color-text-muted: #737373;
    
    /* Accent Colors */
    --color-accent: #DC2626;
    --color-accent-cyan: #06B6D4;
    
    /* Grid & Border */
    --color-border: #262626;
    --color-grid: rgba(220, 38, 38, 0.08);
    
    /* Typography */
    --font-display: 'Unbounded', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ==========================================
   RESET & BASE
   ========================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    background: var(--color-bg-dark);
    overflow-x: hidden;
    min-height: 100vh;
}

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 900;
    color: var(--color-text-primary);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3.5rem);
}

h3 {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
}

p {
    margin-bottom: var(--space-md);
}

p:last-child {
    margin-bottom: 0;
}

/* ==========================================
   LAYOUT
   ========================================== */

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
}

/* ==========================================
   NAVIGATION
   ========================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-base);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav__logo svg {
    display: block;
    transition: opacity var(--transition-fast);
}

.nav__logo:hover svg {
    opacity: 0.8;
}

.nav__menu {
    display: flex;
    gap: var(--space-xl);
    align-items: center;
}

.nav__link {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
    position: relative;
    padding: 0.5rem 0;
}

.nav__link:hover {
    color: var(--color-text-primary);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__link--cta {
    color: var(--color-text-primary);
    background: var(--color-primary);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-sm);
}

.nav__link--cta::after {
    display: none;
}

.nav__link--cta:hover {
    background: var(--color-primary-dark);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    position: relative;
    z-index: 10;
}

.nav__toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-base);
    display: block;
}

@media (max-width: 768px) {
    .nav__toggle {
        display: flex;
    }
    
    .nav__menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--color-bg-darker);
        border-top: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-lg);
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }
    
    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav__link {
        width: 100%;
        text-align: center;
    }

    .nav__link::after {
        left: 50%;
        transform: translateX(-50%);
    }
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 1rem 2rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
    text-align: center;
    text-decoration: none;
}

.btn--primary {
    background: var(--color-primary);
    color: var(--color-text-primary);
}

.btn--primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(220, 38, 38, 0.3);
}

.btn--ghost {
    background: transparent;
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

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

.btn--large {
    padding: 1.25rem 2.5rem;
    font-size: 1rem;
}

/* ==========================================
   SECTION HEADERS
   ========================================== */

.section-header {
    margin-bottom: var(--space-3xl);
}

.section-header--centered {
    text-align: center;
}

.section-label {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.section-title {
    margin-bottom: var(--space-md);
}

/* ==========================================
   HERO SECTION
   ========================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 var(--space-3xl);
    overflow: hidden;
}

.hero__background {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.grid-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(var(--color-grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridPulse 4s ease-in-out infinite;
}

@keyframes gridPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

.hero__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero__label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.6s ease backwards;
}

.hero__title {
    margin-bottom: var(--space-lg);
}

.hero__title-line {
    display: block;
    animation: fadeInUp 0.8s ease backwards;
}

.hero__title-line:nth-child(1) {
    animation-delay: 0.1s;
}

.hero__title-line:nth-child(2) {
    animation-delay: 0.2s;
    color: var(--color-primary);
}

.hero__text {
    font-size: 1.125rem;
    line-height: 1.7;
    max-width: 540px;
    margin-bottom: var(--space-xl);
    animation: fadeInUp 1s ease backwards 0.3s;
}

.hero__cta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 1.2s ease backwards 0.4s;
    flex-wrap: wrap;
}

.hero__proof {
    display: flex;
    gap: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    animation: fadeInUp 1.4s ease backwards 0.5s;
}

.hero__proof-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.hero__proof-label {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Tech Grid Visualization */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.tech-grid__item {
    animation: fadeInScale 0.8s ease backwards;
    animation-delay: var(--delay);
}

.tech-grid__bar {
    height: 120px;
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
    position: relative;
    overflow: hidden;
}

.tech-grid__bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    to {
        left: 100%;
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.tech-grid__label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    text-align: center;
}

@media (max-width: 968px) {
    .hero__grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .tech-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-md);
        padding: var(--space-lg);
    }
    
    .tech-grid__bar {
        height: 80px;
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: auto;
        padding: 100px 0 var(--space-2xl);
    }
    
    .hero__cta {
        flex-direction: column;
    }

    .hero__cta .btn {
        width: 100%;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero__proof {
        flex-direction: column;
        gap: var(--space-md);
    }
}

/* ==========================================
   SERVICES SECTION
   ========================================== */

.services {
    padding: var(--space-3xl) 0;
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.service-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.service-card__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.service-card__title {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.service-card__text {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.service-card__list {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-md);
}

.service-card__list li {
    position: relative;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
    padding-left: var(--space-md);
}

.service-card__list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.service-card__link {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

.service-card__link:hover {
    color: var(--color-primary-light);
}

@media (max-width: 968px) {
    .services__grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   WHY SECTION
   ========================================== */

.why {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-darker);
}

.why__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.why__intro {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.why__features {
    display: grid;
    gap: var(--space-lg);
}

.why__feature {
    display: flex;
    gap: var(--space-md);
}

.why__feature-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-bg-dark);
    border-radius: 50%;
    font-weight: 900;
    font-size: 1.125rem;
}

.why__feature-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
}

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

/* Data Visualization */
.data-viz {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: grid;
    gap: var(--space-lg);
}

.data-viz__row {
    display: grid;
    gap: var(--space-md);
}

.data-viz__label {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.data-viz__bar {
    height: 40px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) var(--width));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    padding: 0 var(--space-md);
    position: relative;
    overflow: hidden;
    animation: barExpand 1s ease-out forwards;
    transform-origin: left;
}

@keyframes barExpand {
    from {
        transform: scaleX(0);
    }
    to {
        transform: scaleX(1);
    }
}

.data-viz__value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

@media (max-width: 968px) {
    .why__grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   BENEFITS SECTION
   ========================================== */

.benefits {
    padding: var(--space-3xl) 0;
}

.benefits__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.benefit-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent-cyan));
}

.benefit-card__number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-primary);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: var(--space-md);
}

.benefit-card__title {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.benefit-card__text {
    color: var(--color-text-secondary);
}

@media (max-width: 768px) {
    .benefits__grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   FINAL CTA SECTION
   ========================================== */

.cta-final {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-darker);
}

.cta-final__inner {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-3xl);
    text-align: center;
}

.cta-final__title {
    margin-bottom: var(--space-md);
}

.cta-final__text {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.cta-final__actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .cta-final__inner {
        padding: var(--space-xl);
    }
    
    .cta-final__actions {
        flex-direction: column;
    }

    .cta-final__actions .btn {
        width: 100%;
    }
}

/* ==========================================
   FOOTER
   ========================================== */

.footer {
    background: var(--color-bg-darker);
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-xl);
}

.footer__brand svg {
    margin-bottom: var(--space-md);
}

.footer__tagline {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    max-width: 280px;
}

.footer__links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.footer__heading {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.footer__list li {
    margin-bottom: var(--space-xs);
}

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

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

.footer__bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer__links {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

/* ==========================================
   PAGE-SPECIFIC STYLES
   ========================================== */

.page-hero {
    padding: 140px 0 var(--space-3xl);
    background: var(--color-bg-darker);
    border-bottom: 1px solid var(--color-border);
}

.page-hero__content {
    max-width: 800px;
}

.page-hero__intro {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.page-hero__cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .page-hero {
        padding: 120px 0 var(--space-xl);
    }
    
    .page-hero__cta {
        flex-direction: column;
    }

    .page-hero__cta .btn {
        width: 100%;
    }
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */

.text-center {
    text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }