/**
 * Dr.Coating - Light Theme Design System
 * Clean & Professional Automotive Aesthetic
 */

/* ========================================
   CSS Variables - Light Color System
======================================== */
:root {
    /* Light Base */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;

    /* Accent Colors */
    --accent-primary: #0ea5e9;
    --accent-secondary: #8b5cf6;
    --accent-tertiary: #f43f5e;
    --accent-gradient: linear-gradient(135deg, #0ea5e9 0%, #8b5cf6 100%);

    /* Text */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    /* Borders */
    --border-subtle: #e2e8f0;
    --border-light: #cbd5e1;
    --border-focus: #0ea5e9;

    /* Shadows */
    --shadow-sm: 0 1px 2px 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-colored: 0 10px 40px -10px rgba(14, 165, 233, 0.3);

    /* Glass */
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.5);
}

/* ========================================
   Base Styles
======================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Subtle Grid Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0,0,0,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,0,0,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
}

/* Gradient Text Effect */
.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Typography
======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    font-weight: 400;
}

/* ========================================
   Form Styles
======================================== */
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    font-size: 1rem;
    font-family: 'Outfit', sans-serif;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25rem;
    padding-right: 3rem;
}

.form-select option {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.form-error {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--accent-tertiary);
}

.form-help {
    margin-top: 0.5rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* ========================================
   Buttons
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
}

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

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-colored);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 14px 44px -10px rgba(14, 165, 233, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--border-subtle);
}

.btn-outline {
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
}

.btn-outline:hover:not(:disabled) {
    background: rgba(14, 165, 233, 0.1);
}

.btn-danger {
    background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
    color: white;
}

.btn-white {
    background: white;
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

.btn-white:hover:not(:disabled) {
    box-shadow: var(--shadow-lg);
}

.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* ========================================
   Cards
======================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    overflow: hidden;
}

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

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
}

/* Premium Card */
.card-premium {
    border: 2px solid transparent;
    background: linear-gradient(white, white) padding-box,
                var(--accent-gradient) border-box;
}

/* ========================================
   Alerts
======================================== */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    border: 1px solid;
}

.alert-success {
    background: #f0fdf4;
    border-color: #bbf7d0;
    color: #166534;
}

.alert-error {
    background: #fef2f2;
    border-color: #fecaca;
    color: #dc2626;
}

.alert-warning {
    background: #fffbeb;
    border-color: #fde68a;
    color: #d97706;
}

.alert-info {
    background: #f0f9ff;
    border-color: #bae6fd;
    color: #0284c7;
}

/* ========================================
   Tables
======================================== */
.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.table th,
.table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
}

.table th {
    background: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.table tbody tr {
    transition: background 0.2s;
}

.table tbody tr:hover {
    background: var(--bg-secondary);
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 12px;
}

/* ========================================
   Star Rating
======================================== */
.star-rating {
    display: inline-flex;
    gap: 2px;
    font-size: 1rem;
}

.star-rating .star {
    color: var(--border-light);
    cursor: pointer;
    transition: all 0.2s;
}

.star-rating .star.active {
    color: #fbbf24;
}

/* ========================================
   Progress Steps
======================================== */
.steps {
    display: flex;
    justify-content: space-between;
    position: relative;
    margin-bottom: 2rem;
}

.steps::before {
    content: '';
    position: absolute;
    top: 1.25rem;
    left: 3rem;
    right: 3rem;
    height: 2px;
    background: var(--border-subtle);
}

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

.step-number {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 2px solid var(--border-subtle);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    transition: all 0.3s;
}

.step.active .step-number {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.step.completed .step-number {
    background: #22c55e;
    border-color: #22c55e;
    color: white;
}

.step-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    font-weight: 500;
}

.step.active .step-label {
    color: var(--accent-primary);
}

/* ========================================
   Loading Spinner
======================================== */
.spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========================================
   Modal
======================================== */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-primary);
    border-radius: 20px;
    max-width: 500px;
    width: 90%;
    padding: 2rem;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

/* ========================================
   Badges
======================================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
}

.badge-primary {
    background: #e0f2fe;
    color: #0369a1;
}

.badge-success {
    background: #dcfce7;
    color: #166534;
}

.badge-warning {
    background: #fef3c7;
    color: #d97706;
}

.badge-danger {
    background: #fee2e2;
    color: #dc2626;
}

.badge-premium {
    background: var(--accent-gradient);
    color: white;
}

/* ========================================
   Navigation
======================================== */
.nav-link {
    position: relative;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: color 0.2s;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: all 0.3s;
    transform: translateX(-50%);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

/* ========================================
   Glass Effect (Light Version)
======================================== */
.glass {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Service Cards
======================================== */
.service-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.service-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 3.5rem;
    height: 3.5rem;
    margin: 0 auto 1rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

/* ========================================
   Stats
======================================== */
.stat-card {
    text-align: center;
    padding: 1.5rem;
}

.stat-number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ========================================
   Hero Section
======================================== */
.hero-gradient {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f5f3ff 100%);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--text-primary);
}

/* ========================================
   Animations
======================================== */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

/* ========================================
   Responsive
======================================== */
@media (max-width: 640px) {
    .hide-mobile { display: none !important; }
    .card-body { padding: 1.25rem; }
    .btn { padding: 0.625rem 1.25rem; font-size: 0.875rem; }
}

@media (min-width: 641px) {
    .hide-desktop { display: none !important; }
}

/* ========================================
   Utility Classes
======================================== */
.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Selection */
::selection {
    background: rgba(14, 165, 233, 0.2);
    color: var(--text-primary);
}