/* Base variables (Light Theme) */
:root {
    --bg-main: #f5f5f7;
    --bg-card: rgba(255, 255, 255, 0.7);
    --bg-sidebar: rgba(255, 255, 255, 0.8);
    --accent: #0071e3;
    --accent-hover: #0077ed;
    --text-main: #1d1d1f;
    --text-dim: #86868b;
    --border: rgba(0, 0, 0, 0.1);
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
    --glass-blur: blur(20px);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --glass-border: rgba(255, 255, 255, 0.4);
}

/* Dark Theme overrides via class or media query */
@media (prefers-color-scheme: dark) {
    :root:not(.light-mode) {
        --bg-main: #000000;
        --bg-card: rgba(28, 28, 30, 0.7);
        --bg-sidebar: rgba(28, 28, 30, 0.8);
        --accent: #0a84ff;
        --accent-hover: #409cff;
        --text-main: #f5f5f7;
        --text-dim: #a1a1a6;
        --border: rgba(255, 255, 255, 0.1);
        --shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
        --glass-border: rgba(255, 255, 255, 0.1);
    }
}

body.dark-mode {
    --bg-main: #000000;
    --bg-card: rgba(28, 28, 30, 0.7);
    --bg-sidebar: rgba(28, 28, 30, 0.8);
    --accent: #0a84ff;
    --accent-hover: #409cff;
    --text-main: #f5f5f7;
    --text-dim: #a1a1a6;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: all 0.3s ease;
    min-height: 100vh;
}

/* Background Blobs */
.background-blobs {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    overflow: hidden;
    opacity: 0.5;
}
.blob {
    position: absolute;
    width: 800px; height: 800px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    filter: blur(100px);
    opacity: 0.15;
    border-radius: 50%;
    animation: move 25s infinite alternate;
}
@keyframes move {
    from { transform: translate(-20%, -20%); }
    to { transform: translate(30%, 30%); }
}

/* Navigation */
nav {
    padding: 1.2rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}

.logo { 
    display: flex; 
    align-items: center; 
    gap: 12px; 
    font-size: 1.5rem; 
    font-weight: 800; 
    color: var(--text-main); 
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 40px; height: 40px; 
    background: var(--accent); 
    border-radius: 12px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    color: white;
}

.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}
.nav-links a:hover { color: var(--accent); }

/* Glass Card */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
    padding: 2rem;
    transition: var(--transition);
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

/* Premium Button */
.apple-btn {
    background: var(--accent);
    color: #ffffff !important;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.apple-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.02);
}

.apple-btn-secondary {
    background: var(--border);
    color: var(--text-main) !important;
}

.apple-btn-secondary:hover {
    background: var(--glass-border);
    color: var(--text-main) !important;
}

/* Inputs */
.apple-input {
    background: var(--border);
    border: 1px solid transparent;
    padding: 14px 18px;
    border-radius: 12px;
    color: var(--text-main);
    width: 100%;
    font-size: 1rem;
    transition: var(--transition);
}

.apple-input:focus {
    outline: none;
    background: var(--bg-card);
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

/* Section Header */
.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

/* List Items (Mini Cards) */
.list-item {
    display: flex;
    align-items: center;
    padding: 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    margin-bottom: 0.8rem;
    transition: var(--transition);
}

.list-item:hover {
    background: var(--border);
}

/* Badges */
.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-success { background: rgba(52, 199, 89, 0.1); color: #34c759; }
.badge-warning { background: rgba(255, 159, 10, 0.1); color: #ff9f0a; }

/* Sidebar Navigation */
.nav-sidebar {
    width: 260px;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: var(--bg-sidebar);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--border);
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    z-index: 100;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 12px;
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 4px;
    transition: var(--transition);
}

.nav-link:hover {
    background: var(--border);
}
.nav-link.active {
    background: var(--accent);
    color: white !important;
}
.nav-link.active i {
    color: white !important;
}

.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
    color: var(--accent);
}

/* Dashboard Container */
.main-content {
    margin-left: 260px;
    padding: 3rem;
    max-width: 1200px;
}

@media (max-width: 768px) {
    .nav-sidebar { width: 80px; padding: 2rem 1rem; }
    .nav-link span { display: none; }
    .main-content { margin-left: 80px; padding: 1.5rem; }
}
/* Navigation styles */
.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.lang-switcher {
    display: flex;
    background: var(--border);
    padding: 4px;
    border-radius: 12px;
    gap: 4px;
}

.lang-btn {
    padding: 6px 12px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-dim);
    transition: var(--transition);
}

.lang-btn:hover {
    color: var(--text-main);
}

.lang-btn.active {
    background: var(--bg-card);
    color: var(--text-main);
    box-shadow: var(--shadow);
}

body.dark-mode .lang-btn.active {
    background: var(--accent);
    color: #fff;
}