:root {
    --bg-color: #0f172a;
    --sidebar-bg: #1e293b;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --success-color: #10b981;
    --border-color: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo i {
    color: var(--accent-color);
    font-size: 1.8rem;
}

.nav-links {
    list-style: none;
}

.nav-links li {
    margin-bottom: 0.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 400;
    font-size: 1.1rem;
    padding: 12px 16px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    transform: translateX(5px);
}

.nav-links a.active {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-glow);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 3rem;
    overflow-y: auto;
}

.header {
    margin-bottom: 3rem;
}
.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}
.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Cards */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.4);
}

/* Forms & Tables */
.table-container {
    overflow-x: auto;
    margin-top: 1rem;
}
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
th {
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}
td {
    color: #e2e8f0;
}

.input-field {
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 8px 12px;
    border-radius: 8px;
    width: 100px;
    font-family: 'Outfit';
    transition: border 0.3s ease;
}
.input-field:focus {
    outline: none;
    border-color: var(--accent-color);
}

.btn-update {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}
.btn-update:hover {
    background: #2563eb;
    box-shadow: 0 0 10px var(--accent-glow);
}

/* Uploader Zone */
.upload-zone {
    border: 2px dashed var(--accent-color);
    border-radius: 20px;
    padding: 4rem 2rem;
    text-align: center;
    background: rgba(59, 130, 246, 0.05);
    cursor: pointer;
    transition: all 0.3s ease;
}
.upload-zone:hover {
    background: rgba(59, 130, 246, 0.1);
    transform: scale(1.02);
}
.upload-zone i {
    font-size: 4rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}
.upload-zone h3 {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}
.upload-zone p {
    color: var(--text-secondary);
}