/**
 * CLEARR - Main Stylesheet
 * MVP Version 1.0
 * Design: Modern, Clean, Fast, Responsive
 */

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

:root {
    /* Colors */
    --color-primary: #0A2540;
    --color-secondary: #2ECC71;
    --color-white: #FFFFFF;
    --color-dark: #1a1a1a;
    --color-gray-100: #f7f9fc;
    --color-gray-200: #e5e9f0;
    --color-gray-300: #cbd2dc;
    --color-gray-400: #9aa5b1;
    --color-gray-500: #7b8794;
    --color-gray-600: #616e7c;
    --color-danger: #e74c3c;
    --color-warning: #f39c12;
    --color-info: #3498db;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-primary);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-600);
}

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

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

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(-1 * var(--spacing-sm));
}

.col {
    flex: 1;
    padding: 0 var(--spacing-sm);
}

.col-2 { flex: 0 0 50%; max-width: 50%; }
.col-3 { flex: 0 0 33.333%; max-width: 33.333%; }
.col-4 { flex: 0 0 25%; max-width: 25%; }

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

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

.nav-link {
    color: var(--color-primary);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-link:hover {
    color: var(--color-secondary);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1;
}

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

.btn-primary:hover {
    background: #27ae60;
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: #0d3459;
    color: var(--color-white);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-lg {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
    display: block;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0d3459 100%);
    color: var(--color-white);
    padding: var(--spacing-xxl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero h1 {
    color: var(--color-white);
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 800;
}

.hero p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero .btn {
    margin: var(--spacing-sm);
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.card-text {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

/* ============================================
   PRICING CARDS
   ============================================ */
.pricing-cards {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.pricing-card {
    flex: 1;
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.pricing-card:hover {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-xl);
    transform: translateY(-10px);
}

.pricing-card.featured {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
}

.pricing-card .badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-lg);
    background: var(--color-secondary);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.pricing-plan {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.pricing-price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.pricing-period {
    color: var(--color-gray-500);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-lg);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.pricing-features li {
    padding: var(--spacing-xs) 0;
    color: var(--color-gray-600);
}

.pricing-features li:before {
    content: "✓";
    color: var(--color-secondary);
    font-weight: bold;
    margin-right: var(--spacing-xs);
}

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-family: var(--font-family);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.1);
}

.form-control::placeholder {
    color: var(--color-gray-400);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%230A2540' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* ============================================
   TABLES
   ============================================ */
.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table thead {
    background: var(--color-gray-100);
}

.table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    padding: 1rem;
    border-top: 1px solid var(--color-gray-200);
    color: var(--color-gray-600);
}

.table tr:hover {
    background: var(--color-gray-100);
}

/* ============================================
   BADGES
   ============================================ */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background: rgba(46, 204, 113, 0.1);
    color: var(--color-secondary);
}

.badge-warning {
    background: rgba(243, 156, 18, 0.1);
    color: var(--color-warning);
}

.badge-danger {
    background: rgba(231, 76, 60, 0.1);
    color: var(--color-danger);
}

.badge-info {
    background: rgba(52, 152, 219, 0.1);
    color: var(--color-info);
}

.badge-secondary {
    background: var(--color-gray-200);
    color: var(--color-gray-600);
}

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

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.alert-success {
    background: rgba(46, 204, 113, 0.1);
    color: var(--color-secondary);
    border-left: 4px solid var(--color-secondary);
}

.alert-danger {
    background: rgba(231, 76, 60, 0.1);
    color: var(--color-danger);
    border-left: 4px solid var(--color-danger);
}

.alert-warning {
    background: rgba(243, 156, 18, 0.1);
    color: var(--color-warning);
    border-left: 4px solid var(--color-warning);
}

.alert-info {
    background: rgba(52, 152, 219, 0.1);
    color: var(--color-info);
    border-left: 4px solid var(--color-info);
}

/* ============================================
   DASHBOARD LAYOUT
   ============================================ */
.dashboard {
    display: flex;
    min-height: 100vh;
    background: var(--color-gray-100);
}

.sidebar {
    width: 260px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
}

.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    margin-left: 260px;
}

.sidebar-logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xl);
    color: var(--color-white);
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: var(--spacing-xs);
}

.sidebar-menu a {
    display: block;
    padding: 0.75rem 1rem;
    color: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
}

.main-content {
    flex: 1;
    padding: var(--spacing-lg);
}

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

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

.page-subtitle {
    color: var(--color-gray-500);
}

/* ============================================
   STATS CARDS
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.stat-label {
    color: var(--color-gray-500);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
}

.stat-change {
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.stat-change.positive {
    color: var(--color-secondary);
}

.stat-change.negative {
    color: var(--color-danger);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xxl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.footer-section {
    flex: 1;
}

.footer-title {
    color: var(--color-white);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-links a:hover {
    color: var(--color-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ============================================
   ANIMATIONS & EFFECTS
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
    opacity: 0;
}

.fade-in.delay-1 {
    animation-delay: 0.2s;
}

.fade-in.delay-2 {
    animation-delay: 0.4s;
}

.header-animate {
    animation: slideDown 0.6s ease-out;
}

.card-animate {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-animate:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

/* Steps Grid for How it Works */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.step-card {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.step-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    display: inline-block;
    width: 80px;
    height: 80px;
    line-height: 80px;
    background: linear-gradient(135deg, var(--color-secondary), #27ae60);
    color: var(--color-white);
    font-size: 2.5rem;
    font-weight: 800;
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
}

.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0d3459 100%);
    color: white;
}

/* Hero animations */
.hero-content {
    animation: fadeIn 1s ease-out;
}

/* ============================================
   MODAL
   ============================================ */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

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

.modal-content {
    background-color: var(--color-white);
    margin: auto;
    padding: 0;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-xl);
    animation: slideDown 0.3s ease;
}

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

.modal-header h3 {
    margin: 0;
    color: var(--color-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-gray-500);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

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

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

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-200);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

.sidebar-menu a i {
    margin-right: 0.5rem;
    width: 18px;
    text-align: center;
}

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

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 992px) {
    .pricing-cards {
        flex-direction: column;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .dashboard {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
    }
    
    .col-2, .col-3, .col-4 {
        flex: 0 0 100%;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    
    .hero h1 {
        font-size: 2.25rem;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    /* Steps grid: 2 par ligne sur mobile */
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .step-number {
        width: 60px;
        height: 60px;
        line-height: 60px;
        font-size: 2rem;
    }
    
    .step-card {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    /* Steps grid: 1 par ligne sur très petit mobile */
    .steps-grid {
        grid-template-columns: 1fr;
    }
}