/* ===== CSS Variables & Design Tokens ===== */
:root {
    /* Colors - Light Fresh Palette with Orange, Green & White */
    --color-bg-primary: #fefefe;
    --color-bg-secondary: #f8faf8;
    --color-bg-card: rgba(255, 255, 255, 0.9);
    --color-bg-card-hover: rgba(255, 255, 255, 1);

    /* Accent Colors - Orange & Green */
    --color-accent-primary: #f97316;
    --color-accent-secondary: #22c55e;
    --color-accent-tertiary: #16a34a;
    --color-gradient-start: #f97316;
    --color-gradient-end: #22c55e;

    /* Text Colors */
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;

    /* Effects */
    --color-glow: rgba(249, 115, 22, 0.3);
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-hover: rgba(249, 115, 22, 0.4);

    /* Typography */
    --font-display: 'Space Grotesk', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;

    /* Spacing */
    --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;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

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

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

/* ===== Animated Background ===== */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
}

.gradient-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    pointer-events: none;
    z-index: -1;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent-primary), transparent 70%);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
    opacity: 0.3;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--color-accent-secondary), transparent 70%);
    bottom: 10%;
    left: -100px;
    animation-delay: -5s;
    opacity: 0.25;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--color-accent-tertiary), transparent 70%);
    top: 50%;
    right: 20%;
    animation-delay: -10s;
    opacity: 0.2;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    25% {
        transform: translate(30px, -30px) scale(1.05);
    }

    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }

    75% {
        transform: translate(20px, 10px) scale(1.02);
    }
}

/* ===== Layout ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-lg) 0;
    background: linear-gradient(to bottom, var(--color-bg-primary), transparent);
    backdrop-filter: blur(12px);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-text-primary);
    transition: var(--transition-base);
}

.logo:hover {
    transform: scale(1.02);
}

.logo-icon {
    font-size: 1.25rem;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

.nav-link:hover {
    color: var(--color-text-primary);
    border-color: var(--color-border-hover);
    background: var(--color-bg-card);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-4xl) 0;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-accent-tertiary);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease forwards;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease 0.1s forwards;
    opacity: 0;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
}

.hero-actions {
    animation: fadeInUp 0.6s ease 0.3s forwards;
    opacity: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    color: white;
    box-shadow: 0 4px 24px var(--color-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px var(--color-glow);
}

.btn-secondary {
    background: var(--color-bg-card);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-border-hover);
    background: var(--color-bg-card-hover);
}

.btn-large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1.1rem;
}

/* ===== Featured Section ===== */
.featured {
    padding: var(--space-4xl) 0;
}

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

.section-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    max-width: 500px;
    margin: 0 auto;
}

/* ===== Model Card ===== */
.model-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    backdrop-filter: blur(12px);
    transition: var(--transition-slow);
}

.model-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.model-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1;
}

.model-3d-placeholder {
    perspective: 800px;
}

.cube {
    width: 150px;
    height: 150px;
    position: relative;
    transform-style: preserve-3d;
    animation: rotateCube 15s linear infinite;
}

.cube-face {
    position: absolute;
    width: 150px;
    height: 150px;
    border: 2px solid var(--color-accent-primary);
    background: rgba(99, 102, 241, 0.05);
    backdrop-filter: blur(4px);
}

.cube-front {
    transform: translateZ(75px);
}

.cube-back {
    transform: translateZ(-75px) rotateY(180deg);
}

.cube-right {
    transform: translateX(75px) rotateY(90deg);
}

.cube-left {
    transform: translateX(-75px) rotateY(-90deg);
}

.cube-top {
    transform: translateY(-75px) rotateX(90deg);
}

.cube-bottom {
    transform: translateY(75px) rotateX(-90deg);
}

@keyframes rotateCube {
    0% {
        transform: rotateX(-20deg) rotateY(0deg);
    }

    100% {
        transform: rotateX(-20deg) rotateY(360deg);
    }
}

.model-glow {
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--color-glow), transparent 70%);
    filter: blur(40px);
    z-index: -1;
}

.model-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.model-stats {
    display: flex;
    gap: var(--space-xl);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.stat-icon {
    font-size: 1.25rem;
    color: var(--color-accent-primary);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.model-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===== CTA Section ===== */
.cta {
    padding: var(--space-4xl) 0;
}

.cta-content {
    text-align: center;
    padding: var(--space-3xl);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(6, 182, 212, 0.05));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(12px);
}

.cta-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.cta-text {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--space-xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== Footer ===== */
.footer {
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
}

.footer-text {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .model-card {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .model-visual {
        order: -1;
    }

    .model-stats {
        justify-content: center;
    }

    .model-info {
        text-align: center;
        align-items: center;
    }

    .cube {
        width: 120px;
        height: 120px;
    }

    .cube-face {
        width: 120px;
        height: 120px;
    }

    .cube-front {
        transform: translateZ(60px);
    }

    .cube-back {
        transform: translateZ(-60px) rotateY(180deg);
    }

    .cube-right {
        transform: translateX(60px) rotateY(90deg);
    }

    .cube-left {
        transform: translateX(-60px) rotateY(-90deg);
    }

    .cube-top {
        transform: translateY(-60px) rotateX(90deg);
    }

    .cube-bottom {
        transform: translateY(60px) rotateX(-90deg);
    }
}
/* ===== Calculator Section ===== */
.calculator {
    padding: var(--space-4xl) 0;
}

.calculator-card {
    max-width: 680px;
    margin: 0 auto;
    grid-template-columns: 1fr;
}

.calculator-form {
    gap: var(--space-lg);
}

.calc-row {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.calc-row label {
    font-weight: 600;
    color: var(--color-text-secondary);
}

.calc-row input {
    width: 100%;
    padding: 0.85rem 1rem;
    font: inherit;
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: var(--transition-fast);
}

.calc-row input:focus {
    border-color: var(--color-border-hover);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.15);
}

.calculator-form .btn {
    width: 100%;
}

.calculator-result {
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.calculator-result strong {
    display: block;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

#resultaat {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.2rem);
    font-weight: 700;
    color: var(--color-accent-tertiary);
}

@media (max-width: 768px) {
    .calculator-card {
        padding: var(--space-xl);
    }
}