/* 🎨 DevDA Blog - Modern Design with Sidebar v3 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

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

:root {
    /* Colors - Premium Palette */
    --primary: #7c3aed;
    --primary-light: #a78bfa;
    --primary-dark: #5b21b6;
    --secondary: #06b6d4;
    --secondary-light: #22d3ee;
    --secondary-dark: #0891b2;
    --accent: #ec4899;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    /* Light Mode */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.1);
    
    /* Dark Mode */
    --dark-bg-primary: #0f172a;
    --dark-bg-secondary: #1e293b;
    --dark-bg-tertiary: #334155;
    --dark-text-primary: #f1f5f9;
    --dark-text-secondary: #cbd5e1;
    --dark-text-light: #94a3b8;
    --dark-border: #475569;
    
    /* Spacing & Radius */
    --radius-xs: 6px;
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease-in-out;
    
    /* Sidebar */
    --sidebar-width: 280px;
}

body.dark-mode {
    --bg-primary: var(--dark-bg-primary);
    --bg-secondary: var(--dark-bg-secondary);
    --bg-tertiary: var(--dark-bg-tertiary);
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --text-light: var(--dark-text-light);
    --border: var(--dark-border);
}

html, body {
    height: 100%;
}

body {
    font-family: 'Inter', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* ============ MAIN LAYOUT WITH SIDEBAR ============ */
body.with-sidebar {
    display: flex;
    min-height: 100vh;
}

/* ============ SIDEBAR ============ */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-primary);
    border-right: 1px solid var(--border);
    padding: 24px 16px;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.sidebar.collapsed {
    width: 80px;
}

.sidebar .logo {
    font-size: 20px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.sidebar.collapsed .logo span {
    display: none;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-nav-item {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 500;
}

.sidebar-nav-item:hover {
    background: var(--bg-secondary);
    color: var(--primary);
}

.sidebar-nav-item.active {
    background: var(--primary);
    color: white;
}

.sidebar-nav-item icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-nav-item.text {
    flex: 1;
}

.sidebar.collapsed .sidebar-nav-item.text {
    display: none;
}

/* Hamburger toggle */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1000;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: 8px 12px;
    cursor: pointer;
    font-size: 20px;
}

/* ============ NAVBAR ============ */
.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

body.dark-mode .navbar {
    background: rgba(15, 23, 42, 0.95);
}

.navbar .container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.navbar .logo {
    font-size: 18px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
}

.nav-menu li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.nav-menu li a:hover {
    color: var(--primary);
    background: var(--bg-secondary);
}

/* ============ MAIN CONTENT ============ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

body.with-sidebar .container {
    margin-left: var(--sidebar-width);
    padding-top: 20px;
}

body.with-sidebar.sidebar-collapsed .container {
    margin-left: 80px;
}

/* ============ BUTTONS ============ */
.btn {
    padding: 10px 18px;
    border-radius: var(--radius-md);
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

/* ============ HERO SECTION ============ */
.hero {
    text-align: center;
    padding: 60px 20px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.05), rgba(6, 182, 212, 0.05));
    border-radius: var(--radius-lg);
    margin-bottom: 40px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.hero p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============ CARDS ============ */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-header {
    margin-bottom: 16px;
}

.card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.card-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ============ PROFILE CARD ============ */
.profile-card {
    text-align: center;
    padding: 40px 20px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(6, 182, 212, 0.1));
    border: 1px solid var(--border);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    border: 4px solid var(--bg-primary);
    box-shadow: var(--shadow-lg);
}

.profile-name {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 8px;
}

.profile-status {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
}

.profile-status.online {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.profile-status.offline {
    background: rgba(107, 114, 128, 0.2);
    color: var(--text-light);
}

.profile-status.busy {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.profile-stats {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin: 20px 0;
    padding: 20px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ============ ACHIEVEMENTS ============ */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.badge {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(6, 182, 212, 0.1));
    border: 2px solid var(--border);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 28px;
    padding: 12px;
    text-align: center;
}

.badge:hover {
    transform: scale(1.1);
    border-color: var(--primary);
}

.badge-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* ============ LEADERBOARD ============ */
.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary);
}

.leaderboard-rank {
    font-size: 20px;
    font-weight: 800;
    color: var(--primary);
    min-width: 40px;
}

.leaderboard-rank.gold {
    color: #f59e0b;
}

.leaderboard-rank.silver {
    color: #9ca3af;
}

.leaderboard-rank.bronze {
    color: #d97706;
}

.leaderboard-user {
    flex: 1;
}

.leaderboard-username {
    font-weight: 600;
    color: var(--text-primary);
}

.leaderboard-score {
    font-size: 12px;
    color: var(--text-secondary);
}

.leaderboard-points {
    font-size: 18px;
    font-weight: 800;
    color: var(--secondary);
}

/* ============ TABLES ============ */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

thead {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border);
}

th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    color: var(--text-secondary);
}

td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

tr:hover {
    background: var(--bg-secondary);
}

/* ============ FORMS ============ */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 14px;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

/* ============ DARK MODE TOGGLE ============ */
.dark-mode-toggle {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.dark-mode-toggle:hover {
    background: var(--bg-secondary);
}

/* ============ POSTS GRID ============ */
.posts-preview {
    margin-top: 60px;
}

.posts-preview h2 {
    font-size: 28px;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 16px;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    
    .sidebar-nav {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 4px;
    }
    
    .sidebar-nav-item {
        padding: 8px 12px;
        font-size: 13px;
    }
    
    body.with-sidebar .container {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: block;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .achievements-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
    
    .profile-stats {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px 12px;
    }
    
    .hero {
        padding: 40px 16px;
    }
    
    .hero h1 {
        font-size: 24px;
    }
    
    .profile-avatar {
        width: 90px;
        height: 90px;
        font-size: 36px;
    }
    
    .nav-menu {
        gap: 4px;
    }
    
    th, td {
        padding: 8px 12px;
        font-size: 12px;
    }
}