/**
 * ============================================
 * GESTOR DE FACTURAS - DESIGN SYSTEM
 * Modern, Premium UI Styles
 * ============================================
 */

/* ============================================
   CSS VARIABLES - Design Tokens
   ============================================ */
:root {
    /* Color Palette - Modern & Vibrant */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;

    /* Success Colors */
    --success-50: #f0fdf4;
    --success-100: #dcfce7;
    --success-500: #22c55e;
    --success-600: #16a34a;
    --success-700: #15803d;

    /* Warning Colors */
    --warning-50: #fffbeb;
    --warning-100: #fef3c7;
    --warning-500: #f59e0b;
    --warning-600: #d97706;
    --warning-700: #b45309;

    /* Danger Colors */
    --danger-50: #fef2f2;
    --danger-100: #fee2e2;
    --danger-500: #ef4444;
    --danger-600: #dc2626;
    --danger-700: #b91c1c;

    /* Neutral Colors - Dark Mode Optimized */
    --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;

    /* Dark Background */
    --bg-dark: #0f172a;
    --bg-dark-secondary: #1e293b;
    --bg-dark-tertiary: #334155;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.5);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-index */
    --z-dropdown: 1000;
    --z-modal: 2000;
    --z-toast: 3000;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-image:
        linear-gradient(rgba(17, 24, 39, 0.85), rgba(17, 24, 39, 0.85)),
        url('../assets/background.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    color: var(--gray-100);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--gray-50);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-300);
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */

/* Container */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Card */
.card {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-50);
    margin: 0;
}

.card-body {
    padding: var(--spacing-md) 0;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-cols-1 {
    grid-template-columns: repeat(1, 1fr);
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {

    .grid-cols-4,
    .grid-cols-3,
    .grid-cols-2 {
        grid-template-columns: 1fr;
    }
}

/* Flex Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-sm {
    gap: var(--spacing-sm);
}

.gap-md {
    gap: var(--spacing-md);
}

.gap-lg {
    gap: var(--spacing-lg);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Button Variants */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-600), var(--success-700));
    color: white;
    box-shadow: 0 4px 14px rgba(22, 163, 74, 0.4);
}

.btn-success:hover {
    background: linear-gradient(135deg, var(--success-500), var(--success-600));
    box-shadow: 0 6px 20px rgba(22, 163, 74, 0.6);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-600), var(--warning-700));
    color: white;
    box-shadow: 0 4px 14px rgba(217, 119, 6, 0.4);
}

.btn-warning:hover {
    background: linear-gradient(135deg, var(--warning-500), var(--warning-600));
    box-shadow: 0 6px 20px rgba(217, 119, 6, 0.6);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-600), var(--danger-700));
    color: white;
    box-shadow: 0 4px 14px rgba(220, 38, 38, 0.4);
}

.btn-danger:hover {
    background: linear-gradient(135deg, var(--danger-500), var(--danger-600));
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--gray-100);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Button Sizes */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--gray-200);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--gray-100);
    font-size: 0.875rem;
    transition: all var(--transition-base);
}

.form-control:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-500);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control::placeholder {
    color: var(--gray-500);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-file {
    display: block;
    width: 100%;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--gray-300);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
}

.form-file:hover {
    border-color: var(--primary-500);
    background: rgba(59, 130, 246, 0.05);
}

/* Form Input & Select Aliases */
.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--gray-100);
    font-size: 0.875rem;
    transition: all var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-500);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input::placeholder {
    color: var(--gray-500);
}

.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--gray-100);
    font-size: 0.875rem;
    transition: all var(--transition-base);
    cursor: pointer;
}

.form-select:focus {
    outline: none;
    border-color: var(--primary-500);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Fix select dropdown options background */
.form-select option {
    background: var(--bg-dark-secondary);
    color: var(--gray-100);
    padding: 0.5rem;
}

.form-control option,
.form-textarea option {
    background: var(--bg-dark-secondary);
    color: var(--gray-100);
}


/* Custom Checkbox Styling */
input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    cursor: pointer;
    position: relative;
    transition: all var(--transition-base);
    flex-shrink: 0;
}

input[type="checkbox"]:hover {
    border-color: var(--primary-400);
    background: rgba(59, 130, 246, 0.1);
}

input[type="checkbox"]:checked {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    border-color: var(--primary-500);
}

input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 0.875rem;
    font-weight: bold;
}

input[type="checkbox"]:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Checkbox Label Styling */
label:has(input[type="checkbox"]) {
    cursor: pointer;
    user-select: none;
    transition: color var(--transition-fast);
}

label:has(input[type="checkbox"]):hover {
    color: var(--primary-300);
}


/* ============================================
   BADGES & STATUS
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: rgba(59, 130, 246, 0.2);
    color: var(--primary-300);
    border: 1px solid var(--primary-500);
}

.badge-success {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success-300);
    border: 1px solid var(--success-500);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-300);
    border: 1px solid var(--warning-500);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-300);
    border: 1px solid var(--danger-500);
}

.badge-gray {
    background: rgba(156, 163, 175, 0.2);
    color: var(--gray-300);
    border: 1px solid var(--gray-500);
}

/* ============================================
   TABLE
   ============================================ */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.table thead {
    background: rgba(255, 255, 255, 0.05);
}

.table th {
    padding: 1rem;
    text-align: left;
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-300);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--gray-200);
}

.table tbody tr {
    transition: background var(--transition-fast);
}

.table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

/* ============================================
   MODAL
   ============================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-dark-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: var(--gray-50);
}

.modal-close {
    background: none;
    border: none;
    color: var(--gray-400);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    line-height: 1;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--gray-100);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.toast-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.toast {
    background: var(--bg-dark-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    min-width: 300px;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--gray-50);
}

.toast-message {
    font-size: 0.875rem;
    color: var(--gray-300);
    margin: 0;
}

.toast-success {
    border-left: 4px solid var(--success-500);
}

.toast-error {
    border-left: 4px solid var(--danger-500);
}

.toast-warning {
    border-left: 4px solid var(--warning-500);
}

.toast-info {
    border-left: 4px solid var(--primary-500);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-50);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.navbar-menu {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.navbar-link {
    color: var(--gray-300);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.navbar-link:hover {
    color: var(--gray-50);
    background: rgba(255, 255, 255, 0.1);
}

.navbar-link.active {
    color: var(--gray-50);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.2));
    border-left: 3px solid var(--primary-500);
    font-weight: 600;
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-left {
    text-align: left;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mt-xl {
    margin-top: var(--spacing-xl);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

/* Loading Spinner */
.spinner {
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary-500);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }

    .navbar-menu {
        display: none;
    }

    .modal {
        width: 95%;
    }

    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }

    .toast {
        min-width: auto;
    }
}