/* ==========================================================================
   SOSMOTEUR - FEUILLE DE STYLE PRINCIPALE
   Conception : Ingénierie & Reprogrammation Moteur (100% Cartographie & Électronique)
   Domaine : sosmoteur.com | Contact : contact@sosmoteur.com
   ========================================================================== */

:root {
    /* Palette Automobile & Racing */
    --color-primary: #e30a17;
    --color-primary-hover: #c40713;
    --color-primary-subtle: rgba(227, 10, 23, 0.08);
    --color-primary-glow: rgba(227, 10, 23, 0.35);

    --color-dark-bg: #0c0d10;
    --color-dark-surface: #14161b;
    --color-dark-card: #191c23;
    --color-dark-border: #262a34;

    --color-light-bg: #f8f9fb;
    --color-light-surface: #ffffff;
    --color-light-border: #e2e5ea;

    --color-text-main: #111827;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;
    --color-text-white: #ffffff;

    --color-success: #10b981;
    --color-warning: #f59e0b;

    /* Typographies */
    --font-heading: 'Oswald', sans-serif;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;

    /* Rayons & Ombres */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --shadow-soft: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
    --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.06), 0 0 1px 1px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 20px 35px -8px rgba(0, 0, 0, 0.12), 0 0 1px 1px rgba(227, 10, 23, 0.2);
    --shadow-red-glow: 0 8px 25px rgba(227, 10, 23, 0.35);

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-medium: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-light-surface);
    color: var(--color-text-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6, .font-heading {
    font-family: var(--font-heading);
    letter-spacing: 0.02em;
    font-weight: 700;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* ==========================================================================
   COMPOSANTS & UTILITAIRES DE DESIGN
   ========================================================================== */

/* Dégradé Racing */
.bg-gradient-red {
    background: linear-gradient(135deg, #e30a17 0%, #b3040f 100%);
}

.text-gradient-red {
    background: linear-gradient(135deg, #e30a17 0%, #ff4d58 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Glow & Accents */
.red-glow {
    box-shadow: var(--shadow-red-glow);
}

.subtle-dot-pattern {
    background-image: radial-gradient(rgba(227, 10, 23, 0.12) 1px, transparent 1px);
    background-size: 24px 24px;
}

/* Badges */
.badge-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 9999px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.badge-tag-red {
    background: var(--color-primary-subtle);
    color: var(--color-primary);
    border: 1px solid rgba(227, 10, 23, 0.2);
}

.badge-tag-dark {
    background: rgba(255, 255, 255, 0.08);
    color: #f1f5f9;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.badge-tag-green {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.25);
}

/* ==========================================================================
   BOUTONS
   ========================================================================== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--color-primary);
    color: #ffffff !important;
    padding: 13px 28px;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-red-glow);
    transition: all var(--transition-fast);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(227, 10, 23, 0.45);
}

.btn-outline-dark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: transparent;
    color: var(--color-text-main);
    border: 2px solid var(--color-dark-bg);
    padding: 11px 26px;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
}

.btn-outline-dark:hover {
    background: var(--color-dark-bg);
    color: #ffffff;
    transform: translateY(-2px);
}

.btn-white {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: #ffffff;
    color: var(--color-dark-bg) !important;
    padding: 13px 30px;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-fast);
}

.btn-white:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.22);
}

/* ==========================================================================
   NAVIGATION & HEADER
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--color-light-border);
    z-index: 999;
    transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.top-bar {
    background: var(--color-dark-bg);
    color: var(--color-text-light);
    font-size: 0.78rem;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-dark-border);
}

.nav-link {
    font-weight: 500;
    font-size: 0.88rem;
    color: #334155;
    padding: 6px 2px;
    position: relative;
    transition: color var(--transition-fast);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

/* ==========================================================================
   CARTES DE PRESTATIONS
   ========================================================================== */
.service-card {
    background: #ffffff;
    border: 1px solid var(--color-light-border);
    border-radius: var(--radius-lg);
    padding: 30px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all var(--transition-medium);
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-6px);
    border-color: rgba(227, 10, 23, 0.35);
    box-shadow: var(--shadow-hover);
}

.service-card.card-featured {
    border: 2px solid rgba(227, 10, 23, 0.4);
    box-shadow: 0 8px 25px rgba(227, 10, 23, 0.08);
}

.service-card.card-featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-primary);
}

.service-icon-box {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: var(--color-primary-subtle);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.45rem;
    margin-bottom: 20px;
    transition: all var(--transition-fast);
}

.service-card:hover .service-icon-box {
    background: var(--color-primary);
    color: #ffffff;
    transform: scale(1.08);
}

.spec-pill {
    background: #f1f5f9;
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-size: 0.78rem;
    color: #475569;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ==========================================================================
   FILTRES DE SERVICES
   ========================================================================== */
.filter-btn {
    padding: 8px 20px;
    border-radius: 9999px;
    font-size: 0.82rem;
    font-weight: 600;
    border: 1px solid var(--color-light-border);
    background: #ffffff;
    color: #475569;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(227, 10, 23, 0.3);
}

/* ==========================================================================
   MONITEUR DE LOGS OBD EN DIRECT (DATA-LOGGING ROUTE)
   Remplace l'image statique par une télémétrie vivante et authentique
   ========================================================================== */
.telemetry-card {
    background: var(--color-dark-surface);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    position: relative;
    overflow: hidden;
}

.telemetry-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #e30a17, #f59e0b, #10b981);
}

.telemetry-screen-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-dark-border);
    padding-bottom: 14px;
    margin-bottom: 18px;
}

.telemetry-status-dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 8px var(--color-success);
    animation: blinkStatus 1.8s infinite;
}

@keyframes blinkStatus {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.telemetry-grid {
    display: grid;
    grid-cols-2;
    gap: 12px;
}

.gauge-item {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    text-align: left;
}

.gauge-label {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-text-light);
    display: flex;
    justify-content: space-between;
}

.gauge-value {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.03em;
    margin-top: 4px;
}

.gauge-value.accent-red {
    color: #ff3344;
}
.gauge-value.accent-orange {
    color: #f59e0b;
}
.gauge-value.accent-green {
    color: #10b981;
}

.live-log-waveform {
    width: 100%;
    height: 70px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: 14px;
    position: relative;
    overflow: hidden;
}

/* ==========================================================================
   BAR CHART COMPARAISON PUISSANCE & COUPLE
   ========================================================================== */
.chart-box {
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    color: #ffffff;
}

.bar-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.bar-tube {
    width: 48px;
    border-radius: 6px 6px 0 0;
    transition: height 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.bar-tube.origin {
    background: #475569;
}

.bar-tube.tuned {
    background: linear-gradient(180deg, #ff2635 0%, #b80510 100%);
    box-shadow: 0 0 18px rgba(227, 10, 23, 0.45);
}

/* ==========================================================================
   ACCORDION FAQ
   ========================================================================== */
.faq-item {
    background: #ffffff;
    border: 1px solid var(--color-light-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item.active {
    border-color: var(--color-primary);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
}

.faq-button {
    width: 100%;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text-main);
    text-align: left;
    transition: color var(--transition-fast);
}

.faq-button:hover {
    color: var(--color-primary);
}

.faq-icon-circle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #f1f5f9;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.faq-item.active .faq-icon-circle {
    transform: rotate(45deg);
    background: var(--color-primary);
    color: #ffffff;
}

.faq-content {
    max-height: 0;
    overflow: hidden;
    padding: 0 24px;
    color: #475569;
    font-size: 0.92rem;
    line-height: 1.7;
    transition: max-height 0.35s ease-out, padding 0.35s ease;
}

.faq-item.active .faq-content {
    max-height: 320px;
    padding-bottom: 24px;
}

/* ==========================================================================
   MODAL DE DEVIS & SIMULATEUR
   ========================================================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(12, 13, 16, 0.75);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

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

.modal-window {
    background: #ffffff;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 540px;
    padding: 32px;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
    transform: scale(0.94) translateY(10px);
    transition: transform var(--transition-fast);
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #f1f5f9;
    color: #64748b;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.modal-close-btn:hover {
    background: var(--color-primary);
    color: #ffffff;
}

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #334155;
    margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--color-light-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--color-text-main);
    background: #ffffff;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(227, 10, 23, 0.12);
}

/* ==========================================================================
   ANIMATIONS DE SCROLL REVEAL (CSS)
   ========================================================================== */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.is-revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .service-card {
        padding: 22px;
    }
    .modal-window {
        padding: 24px;
    }
    .chart-box {
        padding: 18px;
    }
}