:root {
    /* Color Palette - Premium Navy & White */
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --primary-dark: #172554;
    --primary-soft: rgba(30, 58, 138, 0.05);
    
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;

    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-on-primary: #ffffff;

    --border: #e2e8f0;
    --border-focus: #1e3a8a;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease-in-out;
}

/* Global Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background: linear-gradient(135deg, #f8fafc 0%, #eff6ff 100%);
    color: var(--text-main);
    min-height: 100vh;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--primary-dark);
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: 1rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    padding: 2rem;
    transition: var(--transition-base);
}

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

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

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

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

input, select, textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    border-radius: 0.625rem;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-main);
    transition: var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-soft);
}

/* Buttons */
button, .btn {
    padding: 0.6rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    background-color: var(--primary);
    color: white;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    box-shadow: 0 4px 6px -1px rgba(30, 58, 138, 0.1), 0 2px 4px -1px rgba(30, 58, 138, 0.06);
}

button:hover, .btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(30, 58, 138, 0.3);
}

.btn-secondary {
    background: white;
    color: var(--secondary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--bg-main);
    color: var(--primary);
    border-color: var(--primary-light);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--primary-soft);
    transform: translateY(-1px);
}

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

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

/* Tables */
.table-container {
    width: 100%;
    overflow-x: auto;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
}

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

th {
    background: #f8fafc;
    padding: 1rem;
    text-align: left;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border);
}

td {
    padding: 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-main);
}

tr:hover td {
    background: var(--bg-main);
}

/* Badges */
.badge {
    display: inline-flex;
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: capitalize;
}

.badge-info { background: #e0f2fe; color: #0369a1; }
.badge-success { background: #dcfce7; color: #15803d; }
.badge-danger { background: #fee2e2; color: #b91c1c; }

/* Utils */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.w-full { width: 100%; }

/* Modal System */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 1rem;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    animation: slideUp 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}