/**
 * ARTIFICIUM - Stylesheet
 * Design elegante, minimal e mobile-first
 * Palette: Nero/Antracite, Oro, Bianco
 */

/* =====================================================
   CSS Variables
   ===================================================== */
:root {
    /* Colors */
    --color-primary: #1a1a2e;
    --color-primary-dark: #0f0f1a;
    --color-primary-light: #25253d;
    --color-accent: #d4af37;
    --color-accent-light: #e8c967;
    --color-accent-dark: #b8942f;
    --color-white: #ffffff;
    --color-gray-100: #f8f9fa;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-success: #28a745;
    --color-danger: #dc3545;
    --color-warning: #ffc107;
    
    /* Typography */
    --font-heading: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Raleway', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(212, 175, 55, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-gray-800);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-primary);
}

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

a:hover {
    color: var(--color-accent-light);
}

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

/* =====================================================
   Login Page
   ===================================================== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-md);
    background: 
        radial-gradient(ellipse at top, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
        linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    animation: fadeInUp 0.6s ease-out;
}

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

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xxl);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(212, 175, 55, 0.2);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-logo {
    font-size: 3rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    text-shadow: var(--shadow-glow);
}

.login-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.login-subtitle {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    font-weight: 400;
}

.login-form .form-group {
    margin-bottom: var(--spacing-lg);
}

.login-form label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-sm);
}

.login-form input {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1rem;
    font-family: var(--font-body);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    background: var(--color-white);
}

.login-form input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-body);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    color: var(--color-primary);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background: var(--color-gray-300);
    color: var(--color-gray-800);
}

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

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

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-icon {
    padding: var(--spacing-sm);
    border-radius: 50%;
    width: 36px;
    height: 36px;
}

.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
}

.alert-error {
    background: rgba(220, 53, 69, 0.1);
    border: 1px solid rgba(220, 53, 69, 0.3);
    color: var(--color-danger);
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    border: 1px solid rgba(40, 167, 69, 0.3);
    color: var(--color-success);
}

/* =====================================================
   Navigation
   ===================================================== */
.main-nav {
    background: var(--color-primary);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.nav-logo:hover {
    color: var(--color-accent);
}

.logo-icon {
    font-size: 1.75rem;
    color: var(--color-accent);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    position: relative;
    transition: var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    left: 0;
    transition: var(--transition-fast);
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    top: 7px;
}

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle.active .hamburger::after {
    transform: rotate(-45deg);
    top: 0;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-links a {
    color: var(--color-gray-300);
    font-size: 0.9rem;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-accent);
    background: rgba(212, 175, 55, 0.1);
}

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
    list-style: none;
    box-shadow: var(--shadow-lg);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: flex;
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-name {
    color: var(--color-gray-300);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-logout {
    color: var(--color-gray-400);
    font-size: 0.875rem;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-logout:hover {
    color: var(--color-danger);
    background: rgba(220, 53, 69, 0.1);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-primary);
        flex-direction: column;
        align-items: stretch;
        padding: var(--spacing-lg);
        gap: var(--spacing-lg);
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-links {
        flex-direction: column;
        align-items: stretch;
    }
    
    .nav-links a {
        padding: var(--spacing-md);
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        margin-top: var(--spacing-sm);
        padding-left: var(--spacing-lg);
    }
    
    .nav-user {
        flex-direction: column;
        padding-top: var(--spacing-lg);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
}

/* =====================================================
   Main Content
   ===================================================== */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: calc(100vh - 180px);
}

.page-header {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.page-title {
    font-size: 2rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    color: var(--color-gray-400);
    font-size: 1rem;
}

/* =====================================================
   Dashboard Cards
   ===================================================== */
.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(212, 175, 55, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card:hover::before {
    opacity: 1;
}

.card-link {
    color: inherit;
    display: block;
}

.card-link:hover {
    color: inherit;
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
    color: var(--color-primary);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--color-gray-600);
    font-size: 0.9rem;
}

.card-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent-dark);
    margin-bottom: var(--spacing-sm);
}

.card-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--color-accent);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

/* Admin Card */
.card.card-admin {
    border: 2px solid rgba(212, 175, 55, 0.3);
}

.card.card-admin .card-icon {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-accent);
}

/* =====================================================
   Forms
   ===================================================== */
.form-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1rem;
    font-family: var(--font-body);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    background: var(--color-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
}

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

.form-hint {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    margin-top: var(--spacing-xs);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.form-actions .btn {
    flex: 1;
}

/* Calculation Preview */
.calculation-preview {
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    border: 1px dashed var(--color-accent);
}

.calculation-preview h4 {
    font-size: 0.9rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.calculation-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.calculation-row:last-child {
    border-bottom: none;
    font-weight: 600;
    color: var(--color-accent-dark);
}

/* =====================================================
   Tables
   ===================================================== */
.table-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    overflow-x: auto;
}

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

.data-table th,
.data-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.data-table th {
    font-weight: 600;
    color: var(--color-gray-700);
    background: var(--color-gray-100);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table tr:hover {
    background: var(--color-gray-50);
}

.data-table .amount {
    font-weight: 600;
    color: var(--color-accent-dark);
}

.data-table .status {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
}

.status-paid {
    background: rgba(40, 167, 69, 0.1);
    color: var(--color-success);
}

.status-pending {
    background: rgba(255, 193, 7, 0.2);
    color: var(--color-gray-800);
}

.table-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Mobile Tables */
@media (max-width: 768px) {
    .data-table thead {
        display: none;
    }
    
    .data-table tr {
        display: block;
        margin-bottom: var(--spacing-md);
        border: 1px solid var(--color-gray-200);
        border-radius: var(--radius-md);
        padding: var(--spacing-md);
    }
    
    .data-table td {
        display: flex;
        justify-content: space-between;
        padding: var(--spacing-sm);
        border-bottom: 1px solid var(--color-gray-100);
    }
    
    .data-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--color-gray-600);
    }
    
    .data-table td:last-child {
        border-bottom: none;
    }
}

/* =====================================================
   Payment Section
   ===================================================== */
.payment-summary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.payment-summary h2 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
    opacity: 0.8;
}

.payment-summary .total-amount {
    font-size: 3rem;
    font-weight: 700;
    font-family: var(--font-heading);
}

.payment-summary .btn {
    margin-top: var(--spacing-lg);
    background: var(--color-primary);
    color: var(--color-accent);
}

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

/* =====================================================
   Footer
   ===================================================== */
.main-footer {
    background: var(--color-primary-dark);
    padding: var(--spacing-xl);
    text-align: center;
    border-top: 1px solid rgba(212, 175, 55, 0.2);
}

.footer-text {
    color: var(--color-gray-400);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.footer-logo {
    color: var(--color-accent);
    font-size: 1.2rem;
    margin-right: var(--spacing-sm);
}

.footer-copy {
    color: var(--color-gray-600);
    font-size: 0.8rem;
}

/* =====================================================
   Utilities
   ===================================================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-gray-500); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-accent { color: var(--color-accent); }

.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.hidden { display: none !important; }

/* =====================================================
   Animations
   ===================================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

.animate-fade { animation: fadeIn 0.3s ease-out; }
.animate-slide { animation: slideIn 0.4s ease-out; }

/* Stagger animation for cards */
.dashboard-cards .card:nth-child(1) { animation-delay: 0ms; }
.dashboard-cards .card:nth-child(2) { animation-delay: 50ms; }
.dashboard-cards .card:nth-child(3) { animation-delay: 100ms; }
.dashboard-cards .card:nth-child(4) { animation-delay: 150ms; }
.dashboard-cards .card:nth-child(5) { animation-delay: 200ms; }
.dashboard-cards .card:nth-child(6) { animation-delay: 250ms; }

.dashboard-cards .card {
    animation: slideIn 0.5s ease-out backwards;
}

/* =====================================================
   Modal
   ===================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    padding: var(--spacing-md);
}

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

.modal {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform var(--transition-fast);
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-200);
}

.modal-title {
    font-size: 1.25rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-gray-500);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.modal-close:hover {
    color: var(--color-gray-800);
}

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

.empty-state-icon {
    font-size: 4rem;
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-lg);
}

.empty-state h3 {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-sm);
}

/* =====================================================
   Responsive Adjustments
   ===================================================== */
@media (max-width: 576px) {
    .login-card {
        padding: var(--spacing-xl);
    }
    
    .login-title {
        font-size: 1.5rem;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .card {
        padding: var(--spacing-lg);
    }
    
    .card-amount {
        font-size: 1.5rem;
    }
    
    .payment-summary .total-amount {
        font-size: 2.5rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
}