/* === CSS Variables === */
:root {
    --primary: #8b0000;
    --primary-hover: #6b0000;
    --primary-light: #fdf2f2;
    --accent: #ffd700;
    --accent-hover: #ffb300;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --success: #16a34a;
    --success-bg: #f0fdf4;
    --success-text: #166534;
    --warning-bg: #fffbeb;
    --warning-text: #92400e;
    --error-bg: #fef2f2;
    --error-text: #991b1b;
    --info-bg: #eff6ff;
    --info-text: #1e40af;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,.1);
}

/* === Reset === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--gray-50);
}

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

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

/* === Typography === */
h1, h2, h3, h4 {
    line-height: 1.3;
    color: var(--gray-900);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }

/* === Forms === */
label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
    color: var(--gray-700);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="datetime-local"],
textarea,
select {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    color: var(--gray-800);
    background: #fff;
    transition: border-color 0.15s;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(139, 0, 0, 0.1);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

/* === Buttons === */
.btn {
    display: inline-block;
    padding: 0.55rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: background 0.15s, transform 0.1s;
    line-height: 1.5;
}

.btn:hover {
    text-decoration: none;
}

.btn:active {
    transform: scale(0.98);
}

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

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

.btn-danger {
    background: var(--danger);
    color: #fff;
}

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

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

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

/* === Tables === */
.table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

th, td {
    padding: 0.6rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

th {
    font-weight: 600;
    color: var(--gray-600);
    background: var(--gray-50);
    white-space: nowrap;
}

th a {
    color: var(--gray-600);
}

tbody tr:hover {
    background: var(--gray-50);
}

/* === Flash Messages === */
.flash {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

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

.flash-error {
    background: var(--error-bg);
    color: var(--error-text);
}

.flash-warning {
    background: var(--warning-bg);
    color: var(--warning-text);
}

.flash-info {
    background: var(--info-bg);
    color: var(--info-text);
}

/* === Cards === */
.card {
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
}

/* === Utilities === */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-500); }
.text-sm { font-size: 0.85rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--gray-500);
}

/* === Actions cell === */
.actions {
    white-space: nowrap;
}

.actions form {
    display: inline;
}