/* ========================================
   Dive Melbourne - Styles
   Mobile-first, Melbourne coastal palette
   ======================================== */

/* ========================================
   CSS Variables - Blue-Grey Coastal Palette
   ======================================== */
:root {
    /* Primary Colors - Blue-Grey */
    --color-primary: #455A64;
    --color-primary-light: #607D8B;
    --color-primary-dark: #263238;

    /* Accent Colors - Cool Blues */
    --color-accent: #5C9EAD;
    --color-accent-light: #88BCC7;
    --color-sand: #E8EAF6;
    --color-seafoam: #B0BEC5;

    /* Neutrals */
    --color-text: #1A2332;
    --color-text-light: #4A5568;
    --color-bg: #FFFFFF;
    --color-bg-accent: #F7FAFC;
    --color-border: #E2E8F0;

    /* Typography */
    --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-heading: 'Georgia', serif;

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

    /* Layout */
    --container-max: 1200px;
    --border-radius: 8px;
    --transition: 0.3s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

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

a:hover {
    color: var(--color-accent);
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary-dark);
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.75rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   Layout Components
   ======================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.content-section {
    padding: var(--spacing-xl) 0;
}

.bg-accent {
    background-color: var(--color-bg-accent);
}

/* ========================================
   Header & Navigation
   ======================================== */
.site-header {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    font-family: var(--font-heading);
}

.nav-brand a:hover {
    color: var(--color-accent-light);
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.nav-menu a {
    color: white;
    font-weight: 500;
    padding: var(--spacing-xs);
}

.nav-menu a:hover {
    color: var(--color-accent-light);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    padding: var(--spacing-xxl) var(--spacing-sm);
    text-align: center;
}

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

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: white;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.cta-button {
    display: inline-block;
    background-color: var(--color-accent);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: bold;
    transition: transform var(--transition), background-color var(--transition);
}

.cta-button:hover {
    background-color: var(--color-accent-light);
    transform: translateY(-2px);
    color: var(--color-primary-dark);
}

/* ========================================
   Cards & Grid
   ======================================== */
.grid {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.card {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.badge {
    display: inline-block;
    background-color: var(--color-seafoam);
    color: var(--color-primary-dark);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: var(--spacing-xs);
}

.info-grid {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.info-card {
    background: white;
    padding: var(--spacing-md);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--border-radius);
}

.info-card h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

/* ========================================
   Ad Container
   ======================================== */
.ad-container {
    max-width: var(--container-max);
    margin: var(--spacing-lg) auto;
    padding: 0 var(--spacing-sm);
    text-align: center;
}

#header-ad {
    min-height: 90px;
    background-color: var(--color-bg-accent);
    border: 1px dashed var(--color-border);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

#header-ad::before {
    content: 'Advertisement';
    color: var(--color-text-light);
    font-size: 0.875rem;
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
    background-color: var(--color-primary-dark);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-xxl);
}

.footer-content {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-sm);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: white;
    opacity: 0.9;
}

.footer-section a:hover {
    opacity: 1;
    color: var(--color-accent-light);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

/* ========================================
   Blog Styles
   ======================================== */
.article-header {
    margin-bottom: var(--spacing-lg);
}

.article-meta {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.article-content {
    max-width: 800px;
}

.article-content h2 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.article-content p {
    margin-bottom: var(--spacing-md);
}

.article-content ul,
.article-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.article-content li {
    margin-bottom: var(--spacing-xs);
}

/* ========================================
   Responsive Design
   ======================================== */

/* Tablet (768px and up) */
@media (min-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .hero h1 {
        font-size: 3rem;
    }

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

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

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

    .container {
        padding: 0 var(--spacing-lg);
    }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
    .hero h1 {
        font-size: 3.5rem;
    }

    .content-section {
        padding: var(--spacing-xxl) 0;
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .site-header,
    .site-footer,
    .ad-container,
    .cta-button {
        display: none;
    }

    body {
        color: black;
        background: white;
    }

    a {
        text-decoration: underline;
    }
}