/* 
   Zen Dawn Theme 
   Modern, calm, and interactive self-growth blog
*/

:root {
    /* Color Palette - Light Theme (Default) */
    --bg-primary: #FAF9F6; /* Off-white */
    --bg-secondary: #FFFFFF;
    --text-primary: #2D3748; /* Deep charcoal */
    --text-secondary: #718096;
    --text-muted: #A0AEC0;
    
    /* Accents */
    --accent-primary: #8A9A86; /* Sage green */
    --accent-primary-hover: #7b8f77;
    --accent-secondary: #E29578; /* Terracotta peach */
    
    /* UI Elements */
    --border-color: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    
    /* Shadows */
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    --shadow-hover: 0 25px 35px -5px rgba(0, 0, 0, 0.08), 0 15px 15px -5px rgba(0, 0, 0, 0.04);
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --max-width: 1200px;
    --nav-height: 80px;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --bg-primary: #1A202C;
    --bg-secondary: #2D3748;
    --text-primary: #F7FAFC;
    --text-secondary: #E2E8F0;
    --text-muted: #A0AEC0;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(26, 32, 44, 0.8);
    --glass-border: rgba(255, 255, 255, 0.05);
    
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 25px 35px -5px rgba(0, 0, 0, 0.4);
}

/* CSS Reset & Global Settings */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 500;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

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

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

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

/* Glassmorphism Utilities */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
}

/* Typography Utility Classes */
.badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background-color: rgba(138, 154, 134, 0.15); /* light sage */
    color: var(--accent-primary);
    border-radius: 2rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    border-radius: 3rem;
    font-weight: 500;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.btn-primary {
    background-color: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(138, 154, 134, 0.39);
}

.btn-primary:hover {
    background-color: var(--accent-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(138, 154, 134, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--text-primary);
    background-color: rgba(0,0,0,0.02);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.glass-nav {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--accent-primary);
    font-size: 1.4rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent-primary);
    transition: width var(--transition-normal);
}

.nav-link.active::after {
    width: 100%;
}

.theme-toggle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--accent-secondary);
    transform: rotate(15deg);
}

/* Hero Section */
.hero {
    padding-top: calc(var(--nav-height) + 4rem);
    padding-bottom: 4rem;
    max-width: var(--max-width);
    margin: 0 auto;
    padding-inline: 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: 80vh;
}

.hero-content {
    animation: fadeUp 1s ease-out forwards;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 90%;
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.reader-count {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.avatars {
    display: flex;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--bg-primary);
    margin-left: -10px;
    background-size: cover;
    background-color: var(--border-color); /* Fallback */
}
.avatar:first-child { margin-left: 0; background-image: url('https://i.pravatar.cc/100?img=1'); }
.avatar:nth-child(2) { background-image: url('https://i.pravatar.cc/100?img=2'); }
.avatar:nth-child(3) { background-image: url('https://i.pravatar.cc/100?img=3'); }


.hero-visual {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeLeft 1.2s ease-out forwards;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    z-index: -1;
    opacity: 0.6;
}

.orb-1 {
    width: 300px;
    height: 300px;
    background: var(--accent-primary);
    top: 10%;
    right: 10%;
    animation: float 10s infinite ease-in-out;
}

.orb-2 {
    width: 250px;
    height: 250px;
    background: var(--accent-secondary);
    bottom: 10%;
    left: 0;
    animation: float 8s infinite ease-in-out reverse;
}

.hero-featured-card {
    padding: 2.5rem;
    border-radius: 24px;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    z-index: 1;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    transition: transform var(--transition-normal);
}

.hero-featured-card:hover {
    transform: translateY(-10px);
}

.card-tag {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    display: block;
}

.hero-featured-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.hero-featured-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.read-more i {
    transition: transform var(--transition-fast);
}

.hero-featured-card:hover .read-more i {
    transform: translateX(4px);
}

/* Filters Section */
.blog-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem;
}

.filters-section {
    margin-bottom: 3rem;
    position: relative;
}

.filter-scroll {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 1rem;
    scrollbar-width: none; /* Firefox */
}

.filter-scroll::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
}

.filter-chip {
    padding: 0.6rem 1.2rem;
    border-radius: 2rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.filter-chip:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.filter-chip.active {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

/* Post Grid */
.post-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 3rem 2rem;
    margin-bottom: 4rem;
}

.post-card {
    display: flex;
    flex-direction: column;
    border-radius: 20px;
    background-color: var(--bg-secondary);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    opacity: 0; /* for animation */
    transform: translateY(20px);
    animation: fadeUp 0.6s ease-out forwards;
}

.post-card:nth-child(2) { animation-delay: 0.1s; }
.post-card:nth-child(3) { animation-delay: 0.2s; }

.post-card:hover {
    transform: translateY(-8px) !important; /* override animation */
    box-shadow: var(--shadow-hover);
}

.card-image-wrapper {
    position: relative;
    padding-top: 60%; /* 16:9 Aspect Ratio approx */
    overflow: hidden;
}

.card-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-color: var(--border-color); /* placeholder color */
    transition: transform var(--transition-slow);
}

.post-card:hover .card-image {
    transform: scale(1.05);
}

.like-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-muted);
    transition: all var(--transition-fast);
    z-index: 2;
    box-shadow: var(--shadow-sm);
}

.like-btn:hover {
    color: #ff4757;
    transform: scale(1.1);
}

.like-btn.liked {
    color: #ff4757;
}

/* Like animation */
@keyframes heartBurst {
    0% { transform: scale(1); }
    50% { transform: scale(1.4); }
    100% { transform: scale(1); }
}

.like-btn.liked i {
    font-weight: 900; /* FontAwesome solid */
    animation: heartBurst 0.4s ease-out;
}

.card-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.meta-tag {
    color: var(--accent-primary);
    font-weight: 500;
}

.card-title {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    line-height: 1.3;
}

.card-title a {
    color: var(--text-primary);
}

.card-title a:hover {
    color: var(--accent-primary);
}

.card-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.card-footer .date {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.read-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.post-card:hover .read-link {
    color: var(--accent-primary);
}

.load-more-container {
    text-align: center;
    margin-top: 2rem;
}

/* Footer */
.site-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 5rem 2rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
    max-width: 300px;
}

.footer-newsletter h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.footer-newsletter p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.subscribe-form {
    display: flex;
    gap: 0.5rem;
}

.subscribe-form input {
    flex-grow: 1;
    padding: 0.8rem 1.2rem;
    border-radius: 2rem;
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition-fast);
}

.subscribe-form input:focus {
    border-color: var(--accent-primary);
}

.subscribe-form button {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: var(--text-primary);
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.subscribe-form button:hover {
    background-color: var(--accent-primary);
    transform: translateX(2px);
}

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: var(--text-muted);
    font-size: 1.2rem;
}

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

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes float {
    0% { transform: translateY(0px) translateX(0px); }
    33% { transform: translateY(-30px) translateX(20px); }
    66% { transform: translateY(20px) translateX(-20px); }
    100% { transform: translateY(0px) translateX(0px); }
}

/* Responsive Variables */
@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: calc(var(--nav-height) + 2rem);
    }
    
    .hero-subtitle {
        margin: 0 auto 2.5rem;
    }
    
    .hero-cta {
        justify-content: center;
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .hero-visual {
        height: 400px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none; /* In a real app, add a hamburger menu */
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}