/* Derive Website - Shared Styles */
/* Matching PWA Design System */

:root {
    /* Colors - Sage Palette */
    --sage-50: #f6f8f7;
    --sage-100: #e8efec;
    --sage-200: #d1dfd9;
    --sage-300: #adc5bc;
    --sage-400: #7fa99b;
    --sage-500: #5f8a7d;
    --sage-600: #4a6f65;
    --sage-700: #3d5a53;
    --sage-800: #344a44;
    --sage-900: #2d3f3a;

    /* Gradients */
    --gradient-light: linear-gradient(135deg, #e8efec 0%, #f6f8f7 100%);
    --gradient-dark: linear-gradient(135deg, #1a1f2e 0%, #0f1419 100%);

    /* Glassmorphism */
    --glass-light: rgba(255, 255, 255, 0.7);
    --glass-dark: rgba(26, 31, 46, 0.7);
    --glass-border-light: rgba(255, 255, 255, 0.3);
    --glass-border-dark: rgba(255, 255, 255, 0.1);

    /* Text Colors */
    --text-primary-light: #1a1f2e;
    --text-secondary-light: #4a5568;
    --text-primary-dark: #f7fafc;
    --text-secondary-dark: #cbd5e0;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Light Mode (Default) */
body {
    background: var(--gradient-light);
    color: var(--text-primary-light);
}

/* Dark Mode */
body.dark-mode {
    background: var(--gradient-dark);
    color: var(--text-primary-dark);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
/* Header */
header {
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

body header {
    background: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid var(--glass-border-light);
}

body.dark-mode header {
    background: rgba(26, 31, 46, 0.85);
    border-bottom: 1px solid var(--glass-border-dark);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: inherit;
}

.logo img {
    max-width: 60px;
    max-height: 60px;
    width: auto;
    height: auto;
    transition: all 0.3s ease;
}

/* Hide dark logo variant - we only use the plain logo on white background */
.logo-dark {
    display: none;
}

/* Nav removed */
nav {
    display: none;
}

nav a {
    text-decoration: none;
    color: inherit;
    font-weight: 500;
    transition: color 0.2s ease;
}

nav a:hover {
    color: var(--sage-500);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 0.25rem;
    background: rgba(127, 169, 155, 0.08);
    padding: 0.25rem;
    border-radius: var(--radius-md);
}

body.dark-mode .lang-switcher {
    background: rgba(127, 169, 155, 0.12);
}

.lang-btn {
    background: transparent;
    border: none;
    padding: 0.4rem 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--sage-600);
    font-weight: 500;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

body.dark-mode .lang-btn {
    color: var(--sage-400);
}

.lang-btn:hover {
    background: rgba(127, 169, 155, 0.15);
    color: var(--sage-700);
}

body.dark-mode .lang-btn:hover {
    background: rgba(127, 169, 155, 0.2);
    color: var(--sage-300);
}

.lang-btn.active {
    background: var(--sage-500);
    color: white;
}

body.dark-mode .lang-btn.active {
    background: var(--sage-500);
    color: white;
}

.theme-toggle {
    background: rgba(127, 169, 155, 0.08);
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    color: var(--sage-600);
    border-radius: var(--radius-md);
}

body.dark-mode .theme-toggle {
    background: rgba(127, 169, 155, 0.12);
    color: var(--sage-400);
}

.theme-toggle:hover {
    background: rgba(127, 169, 155, 0.15);
    color: var(--sage-700);
}

body.dark-mode .theme-toggle:hover {
    background: rgba(127, 169, 155, 0.2);
    color: var(--sage-300);
}

/* Hero Section */
.hero {
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--sage-500), var(--sage-700));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .tagline {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
}

body .tagline {
    color: var(--text-secondary-light);
}

body.dark-mode .tagline {
    color: var(--text-secondary-dark);
}

.hero .subtitle {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--sage-400);
    color: white;
}

.btn-primary:hover {
    background: var(--sage-500);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(127, 169, 155, 0.3);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--sage-400);
    color: var(--sage-500);
}

body.dark-mode .btn-secondary {
    color: var(--sage-300);
}

.btn-secondary:hover {
    background: var(--sage-400);
    color: white;
}

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

/* Glass Cards */
.card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

body .card {
    background: var(--glass-light);
    border: 1px solid var(--glass-border-light);
}

body.dark-mode .card {
    background: var(--glass-dark);
    border: 1px solid var(--glass-border-dark);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Features Grid */
.features {
    padding: var(--spacing-2xl) 0;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card h3 {
    font-size: 1.5rem;
    color: var(--sage-500);
}

.feature-card-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.feature-icon {
    flex-shrink: 0;
}

.feature-icon svg {
    color: var(--sage-500);
    opacity: 0.8;
}

/* Footer */
footer {
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
    text-align: center;
}

body footer {
    border-top: 1px solid var(--glass-border-light);
}

body.dark-mode footer {
    border-top: 1px solid var(--glass-border-dark);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-links a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--sage-500);
}

.copyright {
    font-size: 0.875rem;
}

body .copyright {
    color: var(--text-secondary-light);
}

body.dark-mode .copyright {
    color: var(--text-secondary-dark);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero .tagline {
        font-size: 1.25rem;
    }

    nav ul {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .header-content {
        /* Keep row layout on mobile */
        flex-direction: row;
        gap: var(--spacing-sm);
    }

    .features h2 {
        font-size: 2rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}