:root {
    --bg-color: #0f172a;
    --sidebar-bg: #1e293b;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-border: 1px solid rgba(255, 255, 255, 0.05);
}

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

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

.dashboard-container {
    display: flex;
    width: 100%;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: var(--glass-border);
    display: flex;
    flex-direction: column;
    padding: 2rem 0;
    box-shadow: 4px 0 15px rgba(0, 0, 0, 0.2);
}

.sidebar-header {
    padding: 0 2rem 2rem;
    border-bottom: var(--glass-border);
    margin-bottom: 2rem;
}

.sidebar-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-nav ul {
    list-style: none;
    padding: 0 1rem;
}

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

.sidebar-nav a {
    text-decoration: none;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.sidebar-nav a:hover, .sidebar-nav li.active a {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.top-header {
    height: 80px;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: var(--glass-border);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
}

.top-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--accent);
}

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

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 4rem;
    color: var(--border-color);
    margin-bottom: 1rem;
}

/* Cards & Forms */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: var(--glass-border);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    max-width: 600px;
    margin: 0 auto;
}

.form-header {
    margin-bottom: 2rem;
    text-align: center;
}

.form-header h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.btn-primary {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 1rem;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

/* Results Area */
.results-area {
    margin-top: 2rem;
    background: rgba(15, 23, 42, 0.6);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.results-area h3 {
    margin-bottom: 1rem;
    color: var(--accent);
    font-size: 1.2rem;
}

.code-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.code-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all 0.3s;
}

.code-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent);
}

.code-id {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.code-value {
    font-family: monospace;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 1px;
}