/**
 * Eurabelt Fuels Onboarding Portal
 * Premium Stylesheet
 * Version: 2.0.0
 * 
 * Brand Colors:
 * - Navy Deep: #0a1628
 * - Navy Mid: #142238
 * - Navy Light: #1e3a5f
 * - Gold Primary: #c9a227
 * - Gold Light: #d4b84a
 * - Gold Dark: #9a7b1c
 */

/* ============================================================
   CSS Custom Properties (Variables)
   ============================================================ */
:root {
    /* Eurabelt Brand - Navy */
    --navy-deep: #0a1628;
    --navy-mid: #142238;
    --navy-light: #1e3a5f;
    
    /* Eurabelt Brand - Gold */
    --gold-primary: #c9a227;
    --gold-light: #d4b84a;
    --gold-dark: #9a7b1c;
    --gold-muted: rgba(201, 162, 39, 0.3);
    
    /* Semantic Colors */
    --color-primary: var(--navy-deep);
    --color-primary-light: var(--navy-light);
    --color-primary-dark: #050d17;
    --color-secondary: var(--gold-primary);
    --color-secondary-light: var(--gold-light);
    --color-secondary-dark: var(--gold-dark);
    
    /* UI Colors */
    --color-success: #28a745;
    --color-success-light: #34ce57;
    --color-warning: #ffc107;
    --color-warning-light: #ffcd39;
    --color-danger: #dc3545;
    --color-danger-light: #e4606d;
    --color-info: #17a2b8;
    --color-info-light: #1fc8e3;
    
    /* Neutrals */
    --white: #ffffff;
    --color-white: #ffffff;
    --color-gray-50: #f8f9fa;
    --color-gray-100: #f1f3f5;
    --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-gray-900: #212529;
    --color-black: #000000;
    
    /* Text Colors */
    --text-on-dark: #ffffff;
    --text-on-dark-secondary: rgba(255, 255, 255, 0.85);
    --text-on-dark-muted: rgba(255, 255, 255, 0.6);
    --text-on-light: #212529;
    --text-on-light-secondary: #495057;
    --text-on-light-muted: #6c757d;
    
    /* Typography */
    --font-heading: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.25);
    --shadow-gold: 0 4px 20px rgba(201, 162, 39, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
}

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

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

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-on-light);
    background-color: var(--color-gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* Dark body variant for pages with dark backgrounds */
body.dark {
    background-color: var(--navy-deep);
    color: var(--text-on-dark);
}

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-4);
    color: inherit;
}

h1 { font-size: clamp(2rem, 5vw, var(--font-size-5xl)); }
h2 { font-size: clamp(1.75rem, 4vw, var(--font-size-4xl)); }
h3 { font-size: clamp(1.5rem, 3vw, var(--font-size-3xl)); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-4);
}

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

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

.text-gold { color: var(--gold-primary); }
.text-white { color: var(--white); }
.text-muted { color: var(--text-on-light-muted); }
.text-center { text-align: center; }

/* ============================================================
   Layout
   ============================================================ */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

.container-sm { max-width: 640px; }
.container-md { max-width: 768px; }
.container-lg { max-width: 1024px; }

/* ============================================================
   Header & Navigation
   ============================================================ */
.header {
    background: linear-gradient(135deg, var(--navy-deep) 0%, var(--navy-mid) 100%);
    color: var(--text-on-dark);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-lg);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--white);
}

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

.nav-main {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.nav-link {
    color: var(--text-on-dark-secondary);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: all var(--transition);
    text-decoration: none;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.nav-link.active {
    background: var(--gold-primary);
    color: var(--navy-deep);
}

/* ============================================================
   Cards
   ============================================================ */
.card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
    background: var(--color-gray-50);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--navy-deep);
    margin: 0;
}

.card-body {
    padding: var(--spacing-6);
}

.card-footer {
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--color-gray-200);
    background: var(--color-gray-50);
}

/* Dark card variant */
.card-dark {
    background: var(--navy-mid);
    color: var(--text-on-dark);
    border: 1px solid rgba(201, 162, 39, 0.2);
}

.card-dark .card-header {
    background: var(--navy-deep);
    border-color: rgba(201, 162, 39, 0.2);
}

.card-dark .card-title {
    color: var(--white);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1.5;
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--navy-deep) 0%, var(--navy-mid) 100%);
    color: var(--white);
    border-color: var(--navy-deep);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-gold {
    background: linear-gradient(135deg, var(--gold-primary) 0%, var(--gold-dark) 100%);
    color: var(--navy-deep);
    border-color: var(--gold-primary);
    box-shadow: var(--shadow-gold);
}

.btn-gold:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(201, 162, 39, 0.4);
}

.btn-outline {
    background: transparent;
    border-color: var(--gold-primary);
    color: var(--gold-primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--gold-primary);
    color: var(--navy-deep);
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text-on-light-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-gray-100);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-base);
}

.btn-block {
    width: 100%;
}

/* ============================================================
   Forms
   ============================================================ */
.form-group {
    margin-bottom: var(--spacing-6);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-on-light);
    margin-bottom: var(--spacing-2);
}

.form-label.required::after {
    content: ' *';
    color: var(--color-danger);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    color: var(--text-on-light);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    background: var(--white);
    border-color: var(--gold-primary);
    box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.15);
}

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

.form-input.is-invalid {
    border-color: var(--color-danger);
}

.form-help {
    font-size: var(--font-size-sm);
    color: var(--text-on-light-muted);
    margin-top: var(--spacing-2);
}

.form-error {
    font-size: var(--font-size-sm);
    color: var(--color-danger);
    margin-top: var(--spacing-2);
}

/* Dark form variant */
.form-dark .form-label {
    color: var(--text-on-dark);
}

.form-dark .form-input {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.2);
}

.form-dark .form-input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--gold-primary);
}

.form-dark .form-input::placeholder {
    color: var(--text-on-dark-muted);
}

/* ============================================================
   Badges
   ============================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary { background: rgba(10, 22, 40, 0.1); color: var(--navy-deep); }
.badge-secondary { background: var(--color-gray-200); color: var(--color-gray-700); }
.badge-success { background: rgba(40, 167, 69, 0.15); color: var(--color-success); }
.badge-warning { background: rgba(255, 193, 7, 0.15); color: #856404; }
.badge-danger { background: rgba(220, 53, 69, 0.15); color: var(--color-danger); }
.badge-info { background: rgba(23, 162, 184, 0.15); color: var(--color-info); }
.badge-gold { background: rgba(201, 162, 39, 0.15); color: var(--gold-dark); }

/* ============================================================
   Tables
   ============================================================ */
.table-wrapper {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: var(--spacing-4);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.table th {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-on-light-secondary);
    background: var(--color-gray-50);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

/* ============================================================
   Alerts
   ============================================================ */
.alert {
    padding: var(--spacing-4) var(--spacing-5);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-4);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
}

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

.alert-warning {
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid rgba(255, 193, 7, 0.3);
    color: #856404;
}

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

.alert-info {
    background: rgba(23, 162, 184, 0.1);
    border: 1px solid rgba(23, 162, 184, 0.3);
    color: var(--color-info);
}

/* ============================================================
   Progress Steps
   ============================================================ */
.progress-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
    margin-bottom: var(--spacing-8);
}

.progress-steps::before {
    content: '';
    position: absolute;
    top: 24px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-gray-200);
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
    flex: 1;
}

.progress-step-circle {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--white);
    border: 3px solid var(--color-gray-300);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--color-gray-400);
    transition: all var(--transition);
}

.progress-step.active .progress-step-circle {
    border-color: var(--gold-primary);
    color: var(--gold-primary);
    box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.2);
}

.progress-step.completed .progress-step-circle {
    border-color: var(--color-success);
    background: var(--color-success);
    color: var(--white);
}

.progress-step-label {
    margin-top: var(--spacing-3);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-on-light-muted);
    text-align: center;
}

.progress-step.active .progress-step-label,
.progress-step.completed .progress-step-label {
    color: var(--text-on-light);
}

/* ============================================================
   Dashboard Stats
   ============================================================ */
.stat-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--gold-primary);
}

.stat-card-value {
    font-family: var(--font-heading);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--navy-deep);
    margin-bottom: var(--spacing-1);
}

.stat-card-label {
    font-size: var(--font-size-sm);
    color: var(--text-on-light-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================================
   Sidebar Layout (Admin)
   ============================================================ */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: linear-gradient(180deg, var(--navy-deep) 0%, var(--navy-mid) 100%);
    color: var(--text-on-dark);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: var(--z-fixed);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-4);
    overflow-y: auto;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-lg);
    color: var(--text-on-dark-secondary);
    text-decoration: none;
    margin-bottom: var(--spacing-1);
    transition: all var(--transition);
}

.sidebar-nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.sidebar-nav-item.active {
    background: var(--gold-primary);
    color: var(--navy-deep);
}

.main-content {
    flex: 1;
    margin-left: 280px;
    background: var(--color-gray-50);
}

.main-header {
    background: var(--white);
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.main-body {
    padding: var(--spacing-6);
}

/* ============================================================
   Loading & Spinners
   ============================================================ */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--gold-primary);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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

/* ============================================================
   Utilities
   ============================================================ */
.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.py-4 { padding-top: var(--spacing-4); padding-bottom: var(--spacing-4); }
.py-6 { padding-top: var(--spacing-6); padding-bottom: var(--spacing-6); }
.px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
.px-6 { padding-left: var(--spacing-6); padding-right: var(--spacing-6); }

.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-2 { gap: var(--spacing-2); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }

.grid { display: grid; gap: var(--spacing-6); }
.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); }

.hidden { display: none; }
.w-full { width: 100%; }
.rounded-lg { border-radius: var(--radius-lg); }
.shadow { box-shadow: var(--shadow-md); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--spacing-4);
    }
    
    .header-inner {
        padding: var(--spacing-3) var(--spacing-4);
    }
}