/* =========================================
   THEME VARIABLES - NOIR & BLANC
   ========================================= */

:root {
    /* PRIMARY COLORS - Dark/Black */
    --primary: #000000;
    --primary-light: #1f2937;
    --primary-lighter: #374151;
    --primary-lightest: #4b5563;
    
    /* NEUTRAL COLORS - White/Gray */
    --neutral: #ffffff;
    --neutral-dark: #f9fafb;
    --neutral-darker: #f3f4f6;
    --neutral-darkest: #e5e7eb;
    --neutral-gray: #d1d5db;
    --neutral-gray-dark: #9ca3af;
    --neutral-gray-darker: #6b7280;
    
    /* SECONDARY COLORS - Gray Gradients */
    --secondary: #6b7280;
    --secondary-light: #9ca3af;
    --secondary-lighter: #d1d5db;
    --secondary-lightest: #e5e7eb;
    
    /* STATE COLORS */
    --success: #059669;
    --success-light: #10b981;
    --warning: #d97706;
    --warning-light: #f59e0b;
    --danger: #dc2626;
    --danger-light: #ef4444;
    --info: #1e40af;
    --info-light: #3b82f6;
    
    /* SEMANTIC COLORS */
    --bg-primary: var(--primary);
    --bg-secondary: #0f172a;
    --bg-surface: var(--neutral);
    --bg-surface-dark: #f9fafb;
    --bg-surface-darker: #f3f4f6;
    
    --text-primary: var(--neutral);
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --text-inverted: var(--primary);
    --text-muted: #6b7280;
    
    --border-primary: #1f2937;
    --border-secondary: #374151;
    --border-light: #d1d5db;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* TRANSITION */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
}

/* =========================================
   DARK MODE (Optional)
   ========================================= */

@media (prefers-color-scheme: dark) {
    :root {
        --bg-surface: #1f2937;
        --bg-surface-dark: #111827;
        --text-primary: #f3f4f6;
    }
}

/* =========================================
   BASE STYLES
   ========================================= */

body {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    transition: background-color var(--transition-base),
                color var(--transition-base);
}

/* =========================================
   NAVIGATION
   ========================================= */

nav {
    background-color: var(--bg-primary);
    border-color: var(--border-primary);
    box-shadow: var(--shadow-md);
}

nav a {
    color: var(--text-secondary);
    transition: color var(--transition-base);
}

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

/* =========================================
   FORMS
   ========================================= */

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #000;
}

.form-control {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-light);
    color: var(--text-inverted);
    transition: border-color var(--transition-base),
                box-shadow var(--transition-base);
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(107, 114, 128, 0.1);
}

.form-check-input {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
}

.form-check-input:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(107, 114, 128, 0.1);
}

/* Form errors - globally visible on light backgrounds */
.form-error-message,
.form-errors ul li,
.form-errors li,
.invalid-feedback,
.text-danger,
ul.form-errors,
ul.form-errors li {
    color: #b91c1c !important;
    font-weight: 600;
    background: #fee2e2;
    padding: 4px 8px;
    border-radius: 6px;
    display: inline-block;
}

/* =========================================
   BUTTONS
   ========================================= */

.btn {
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

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

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

.btn-secondary {
    background-color: var(--neutral-darker);
    color: var(--text-inverted);
}

.btn-secondary:hover {
    background-color: var(--neutral-darkest);
}

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

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

.btn-success {
    background-color: var(--success);
    color: var(--neutral);
}

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

.btn-warning {
    background-color: var(--warning);
    color: var(--neutral);
}

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

.btn-info {
    background-color: var(--info);
    color: var(--neutral);
}

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

/* =========================================
   ALERTS
   ========================================= */

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid;
    transition: all var(--transition-base);
}

.alert-success {
    background-color: #d1fae5;
    border-color: var(--success);
    color: #065f46;
}

.alert-danger {
    background-color: #fee2e2;
    border-color: var(--danger);
    color: #7f1d1d;
}

.alert-warning {
    background-color: #fef3c7;
    border-color: var(--warning);
    color: #78350f;
}

.alert-info {
    background-color: #dbeafe;
    border-color: var(--info);
    color: #082f49;
}

/* =========================================
   CARDS
   ========================================= */

.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base),
                transform var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* =========================================
   UTILITIES
   ========================================= */

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

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

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

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

.bg-surface {
    background-color: var(--bg-surface);
}

.border {
    border-color: var(--border-primary);
}

.border-light {
    border-color: var(--border-light);
}

/* =========================================
   GRADIENTS
   ========================================= */

.gradient-dark {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

.gradient-neutral {
    background: linear-gradient(135deg, var(--neutral-gray-darker) 0%, var(--neutral-gray) 100%);
}

.gradient-light {
    background: linear-gradient(135deg, #e5e7eb 0%, #f3f4f6 100%);
}