/* Professional Light Theme Variables */
:root {
    --bg-body: #f8fafc;
    /* Slate 50 */
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    /* Slate 800 */
    --text-secondary: #64748b;
    /* Slate 500 */
    --primary: #2563eb;
    /* Blue 600 */
    --primary-hover: #1d4ed8;
    /* Blue 700 */
    --success: #10b981;
    /* Emerald 500 */
    --danger: #ef4444;
    /* Red 500 */
    --warning: #f59e0b;
    /* Amber 500 */
    --border: #e2e8f0;
    /* Slate 200 */
    --input-bg: #ffffff;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

/* Typography */
h1,
h2,
h3 {
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 1rem;
    color: #0f172a;
}

h1 {
    font-size: 2.25rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-hover);
}

/* Containers */
.container {
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Professional Cards (Replacing Glassmorphism) */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

/* Login Page Layout */
.login-container {
    min-height: calc(100vh - 80px);
    /* Adjust for navbar if present, or just use 100vh */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 2.5rem !important;
}

/* Navigation - Responsive */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: #ffffff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.25rem;
    border-radius: 8px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
}

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

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

.btn-danger {
    background-color: #fef2f2;
    color: var(--danger);
    border-color: #fee2e2;
}

.btn-danger:hover {
    background-color: #fee2e2;
}

.btn-block {
    width: 100%;
}

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

label {
    display: block;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.875rem;
}

input,
select,
textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Tables - Mobile Responsive */
.table-container {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: #f8fafc;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tr:hover {
    background: #f1f5f9;
}

/* Dashboard Grid - Responsive */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin: 0.25rem 0;
    color: #0f172a;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Flash Messages */
.flash-message {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.flash-danger {
    background: #fef2f2;
    color: var(--danger);
    border: 1px solid #fee2e2;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        padding: 1rem;
        gap: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.75rem;
    }

    .nav-links a {
        margin: 0;
        font-size: 0.8rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    .stat-value {
        font-size: 1.75rem;
    }

    .glass-card {
        padding: 1rem;
    }
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-4 {
    margin-top: 1rem;
}

.text-danger {
    color: var(--danger);
}

.text-success {
    color: var(--success);
}

.text-secondary {
    color: var(--text-secondary);
}