/* 
   FoYoMi - Premium Pet Products
   Design System & Global Styles 
*/

:root {
    /* Colors */
    --color-primary: #0F172A; /* Deep Navy */
    --color-secondary: #3B82F6; /* Vibrant Blue */
    --color-accent: #06B6D4; /* Cyan */
    --color-background: #F8FAFC; /* Very Light Blue-Grey */
    --color-surface: #FFFFFF;
    --color-text-main: #1E293B;
    --color-text-muted: #64748B;
    --color-border: #E2E8F0;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Outfit', system-ui, -apple-system, sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);

    /* Radius */
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-background);
    color: var(--color-text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-primary);
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Header / Nav */
.site-header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: var(--spacing-sm) 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-weight: 500;
    color: var(--color-text-muted);
}

.nav-link:hover, .nav-link.active {
    color: var(--color-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: #1e293b; /* slightly lighter */
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-border);
    color: var(--color-text-main);
}

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

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    max-width: 500px;
}

.hero-image {
    position: relative;
}

.hero-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: transform 0.5s ease;
}

.hero-image:hover img {
    transform: scale(1.02);
}

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

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: 2.5rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    padding: var(--spacing-md);
    background: var(--color-background);
    border-radius: var(--radius-lg);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-secondary);
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.feature-desc {
    color: var(--color-text-muted);
}

/* Manuals Page */
.manuals-section {
    padding: var(--spacing-lg) 0;
    min-height: 60vh;
}

.manual-list {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
}

.manual-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    transition: background 0.2s;
}

.manual-item:last-child {
    border-bottom: none;
}

.manual-item:hover {
    background-color: var(--color-background);
}

.manual-info h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

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

/* Footer */
.site-footer {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

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

.footer-logo {
    font-family: var(--font-display);
    font-weight: bold;
    font-size: 1.25rem;
}

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

/* Responsive */
@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: var(--spacing-lg) 0;
    }

    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }
}