:root {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #10b981;
    --text-color: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-premium: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Platform Colors */
    --facebook: #1877f2;
    --tiktok: #000000;
    --shopee: #ee4d2d;
    --lazada: #0014ff;
    --line: #00b900;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
}

.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* Typography */
h1, h2, h3 {
    font-weight: 700;
    color: var(--text-color);
}

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

/* Cards */
.card {
    background-color: var(--card-bg);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

input, select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: #f8fafc;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background-color: #ffffff;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #4f46e5 0%, #4338ca 100%);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Navigation */
.nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-light);
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    transition: all 0.2s;
}

.nav-link:hover, .nav-link.active {
    background-color: #f1f5f9;
    color: var(--primary);
}

.nav-link.active {
    font-weight: 600;
}

/* Platform Badges/Indicators */
.platform-card {
    border-top: 4px solid var(--border-color);
}

.platform-card.facebook { border-top-color: var(--facebook); }
.platform-card.tiktok { border-top-color: var(--tiktok); }
.platform-card.shopee { border-top-color: var(--shopee); }
.platform-card.lazada { border-top-color: var(--lazada); }
.platform-card.line-oa { border-top-color: var(--line); }

/* Tables */
.table-container {
    background-color: var(--card-bg);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    margin-top: 1.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    background-color: #f8fafc;
    padding: 1rem;
    font-weight: 600;
    color: var(--text-light);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background-color: #f8fafc;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.3s ease-out forwards;
}

/* TV Mode Styles */
body.tv-mode-active .sidebar {
    display: none !important;
}

body.tv-mode-active .main-content {
    padding: 1.5rem;
    max-width: 100vw;
}

body.tv-mode-active .grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

body.tv-mode-active h2 {
    font-size: 2.5rem;
}

/* Premium Gradient Cards */
.bg-gradient-sales {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white !important;
}
.bg-gradient-ads {
    background: linear-gradient(135deg, #ef4444 0%, #f43f5e 100%);
    color: white !important;
}
.bg-gradient-orders {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white !important;
}
.bg-gradient-roi {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white !important;
}

.bg-gradient-sales h2, .bg-gradient-sales .text-muted, .bg-gradient-sales i,
.bg-gradient-ads h2, .bg-gradient-ads .text-muted, .bg-gradient-ads i,
.bg-gradient-orders h2, .bg-gradient-orders .text-muted, .bg-gradient-orders i,
.bg-gradient-roi h2, .bg-gradient-roi .text-muted, .bg-gradient-roi i {
    color: white !important;
}

.bg-gradient-sales .text-muted,
.bg-gradient-ads .text-muted,
.bg-gradient-orders .text-muted,
.bg-gradient-roi .text-muted {
    opacity: 0.9;
}

.bg-gradient-sales div[style*="background-color"],
.bg-gradient-ads div[style*="background-color"],
.bg-gradient-orders div[style*="background-color"],
.bg-gradient-roi div[style*="background-color"] {
    background-color: rgba(255, 255, 255, 0.2) !important;
}

/* Platform Cards Enhanced */
.platform-card {
    border-top: none;
    border-radius: 1rem;
    overflow: hidden;
}

.platform-card.facebook { border-left: 4px solid var(--facebook); }
.platform-card.tiktok { border-left: 4px solid var(--tiktok); }
.platform-card.shopee { border-left: 4px solid var(--shopee); }
.platform-card.lazada { border-left: 4px solid var(--lazada); }
.platform-card.line-oa { border-left: 4px solid var(--line); }

.platform-card:hover {
    box-shadow: var(--shadow-premium);
}

/* Fallback Logo Styles */
.fallback-logo {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 0.5rem;
    color: white !important;
    font-weight: bold;
    font-size: 1.2rem;
    text-transform: uppercase;
}
.fallback-facebook { background-color: var(--facebook); }
.fallback-tiktok { background-color: var(--tiktok); }
.fallback-shopee { background-color: var(--shopee); }
.fallback-lazada { background-color: var(--lazada); }
.fallback-line-oa { background-color: var(--line); }

/* Login Page Specific */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    padding: 1rem;
}

.login-card {
    background-color: var(--card-bg);
    border-radius: 1.5rem;
    padding: 2.5rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    width: 100%;
    max-width: 400px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.login-card h1 {
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
    color: var(--text-color);
}

.login-card .form-group label {
    color: var(--text-color);
    font-weight: 500;
}

.login-card input {
    background-color: #f8fafc;
    border: 1px solid var(--border-color);
}

.login-card input:focus {
    background-color: #ffffff;
    border-color: var(--primary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 1rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .grid-4 {
        grid-template-columns: 1fr !important;
    }
    
    .grid-3 {
        grid-template-columns: 1fr !important;
    }
}

.responsive-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .responsive-grid {
        grid-template-columns: 1fr;
    }
}