/*
 * TRANSPORTS VERICEL - Site Web Corporate
 * Thème: L'Élégance Parisienne de Luxe
 * Palette: Deep Noir (#050505), Ivory Silk (#F9F9F9), Royal Gold (#D4AF37)
 * Typographie: Didot/Bodoni (titres), Montserrat (corps)
 * Conforme WCAG 2.1 AA
 */

/* ========================================
   VARIABLES CSS & THÈME DE COULEURS
   ======================================== */
:root {
    /* Couleurs principales - Mode Clair (Luxe Parisien) */
    --color-deep-noir: #050505;
    --color-ivory-silk: #F9F9F9;
    --color-royal-gold: #D4AF37;
    --color-royal-gold-light: #E8C869;
    --color-royal-gold-dark: #B8941F;
    --color-neutral: #E8E8E8;
    --color-background: #FFFFFF;
    --color-text: #1A1A1A;
    --color-text-muted: #666666;
    --color-border: rgba(212, 175, 55, 0.3);
    --color-shadow: rgba(5, 5, 5, 0.1);

    /* Typographie - Parisian Luxury */
    --font-primary: 'Montserrat', 'Helvetica Neue', Arial, sans-serif;
    --font-secondary: 'Lato', 'Segoe UI', Tahoma, sans-serif;
    --font-serif: 'Didot', 'Bodoni MT', 'Times New Roman', serif;

    /* Espacement */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Bordures */
    --border-thin: 0.5px solid var(--color-border);
    --border-radius: 2px;

    /* Ombres */
    --shadow-subtle: 0 2px 8px var(--color-shadow);
    --shadow-medium: 0 4px 16px var(--color-shadow);
    --shadow-elegant: 0 8px 32px rgba(212, 175, 55, 0.15);

    /* Z-index */
    --z-header: 1000;
    --z-dropdown: 999;
    --z-modal: 10000;
}

/* Mode Sombre */
[data-theme="dark"] {
    --color-deep-noir: #F9F9F9;
    --color-ivory-silk: #1A1A1A;
    --color-royal-gold: #D4AF37;
    --color-neutral: #2A2A2A;
    --color-background: #050505;
    --color-text: #F9F9F9;
    --color-text-muted: #AAAAAA;
    --color-border: rgba(212, 175, 55, 0.4);
    --color-shadow: rgba(249, 249, 249, 0.1);
    --shadow-elegant: 0 8px 32px rgba(212, 175, 55, 0.25);
}

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

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

body {
    font-family: var(--font-secondary);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.7;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

/* ========================================
   TYPOGRAPHIE
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.3;
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-md);
    color: var(--color-deep-noir);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h5 { font-size: clamp(1rem, 2vw, 1.5rem); }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
    color: var(--color-text-muted);
}

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

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

/* ========================================
   HEADER & NAVIGATION
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    background: transparent;
    transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
    padding: var(--spacing-md) 0;
}

.header.scrolled {
    background: rgba(249, 249, 249, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-subtle);
    padding: var(--spacing-sm) 0;
}

[data-theme="dark"] .header.scrolled {
    background: rgba(5, 5, 5, 0.95);
}

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

.header__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.header__logo svg {
    width: 234px;
    height: 70px;
    transition: transform var(--transition-normal);
}

.header__logo:hover svg {
    transform: scale(1.02);
}

.header__logo-text {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    color: var(--color-deep-noir);
}

.header__logo-accent {
    color: var(--color-royal-gold);
}

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

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

.header__nav-link {
    position: relative;
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-deep-noir);
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-royal-gold);
    transition: width var(--transition-normal);
}

.header__nav-link:hover {
    color: var(--color-royal-gold);
}

.header__nav-link:hover::after,
.header__nav-link.active::after {
    width: 100%;
}

.header__nav-icon {
    font-size: 1.2rem;
    margin-right: var(--spacing-xs);
}

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

/* Toggle Thème */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-deep-noir);
    transition: color var(--transition-fast), transform var(--transition-normal);
}

.theme-toggle:hover {
    color: var(--color-royal-gold);
    transform: rotate(15deg);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
}

/* Menu Mobile */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    flex-direction: column;
    gap: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-deep-noir);
    transition: all var(--transition-normal);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--color-background);
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu__close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--color-deep-noir);
    cursor: pointer;
}

.mobile-menu__nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
}

.mobile-menu__link {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 300;
    color: var(--color-deep-noir);
    transition: color var(--transition-fast);
}

.mobile-menu__link:hover {
    color: var(--color-royal-gold);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero__media {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: blur(3px);
    transform: scale(1.05);
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(5, 5, 5, 0.7) 0%, rgba(5, 5, 5, 0.4) 100%);
}

.hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--spacing-xl);
    max-width: 900px;
    animation: fadeInUp 1s ease;
}

.hero__title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 300;
    letter-spacing: 0.1em;
    color: #FFFFFF;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero__subtitle {
    font-family: var(--font-primary);
    font-size: clamp(1rem, 2vw, 1.3rem);
    font-weight: 300;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    text-transform: uppercase;
}

.hero__accent {
    color: var(--color-royal-gold);
}

/* ========================================
   BOUTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    border: var(--border-thin);
    border-radius: 0;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn--primary {
    background: var(--color-deep-noir);
    color: var(--color-ivory-silk);
    border-color: var(--color-deep-noir);
}

.btn--primary:hover {
    background: var(--color-royal-gold);
    border-color: var(--color-royal-gold);
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: var(--shadow-elegant);
}

.btn--outline {
    background: transparent;
    color: var(--color-deep-noir);
    border-color: var(--color-deep-noir);
}

.btn--outline:hover {
    background: var(--color-deep-noir);
    color: var(--color-ivory-silk);
    transform: translateY(-2px);
}

.btn--gold {
    background: var(--color-royal-gold);
    color: #FFFFFF;
    border-color: var(--color-royal-gold);
}

.btn--gold:hover {
    background: transparent;
    color: var(--color-royal-gold);
    transform: translateY(-2px);
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.section--dark {
    background: var(--color-deep-noir);
    color: var(--color-ivory-silk);
}

.section--light {
    background: var(--color-ivory-silk);
}

.section__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: blur(3px);
    z-index: 0;
}

.section__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 5, 5, 0.85);
    z-index: 1;
}

.section__content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

.section__title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 300;
    letter-spacing: 0.1em;
    color: var(--color-deep-noir);
    margin-bottom: var(--spacing-sm);
}

.section--dark .section__title {
    color: var(--color-ivory-silk);
}

.section__subtitle {
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    color: var(--color-royal-gold);
    text-transform: uppercase;
}

/* ========================================
   CARTES
   ======================================== */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.card {
    background: var(--color-background);
    border: var(--border-thin);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-royal-gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

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

.card:hover::before {
    transform: scaleX(1);
}

.card__icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-md);
    color: var(--color-royal-gold);
}

.card__title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
    color: var(--color-deep-noir);
}

.card__text {
    color: var(--color-text-muted);
    line-height: 1.8;
}

/* ========================================
   GRILLES & MISE EN PAGE
   ======================================== */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid--2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid--2,
    .grid--3,
    .grid--4 { grid-template-columns: 1fr; }
}

/* ========================================
   FORMULAIRES
   ======================================== */
.form {
    max-width: 600px;
    margin: 0 auto;
}

.form__group {
    margin-bottom: var(--spacing-md);
}

.form__label {
    display: block;
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-deep-noir);
    margin-bottom: var(--spacing-xs);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-secondary);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-background);
    border: var(--border-thin);
    border-radius: 0;
    transition: all var(--transition-fast);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--color-royal-gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.form__textarea {
    min-height: 150px;
    resize: vertical;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--color-deep-noir);
    color: var(--color-ivory-silk);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer__container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer__title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    color: var(--color-royal-gold);
    margin-bottom: var(--spacing-md);
}

.footer__text {
    color: rgba(249, 249, 249, 0.7);
    line-height: 1.8;
}

.footer__links {
    list-style: none;
}

.footer__link {
    display: block;
    color: rgba(249, 249, 249, 0.7);
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-royal-gold);
}

.footer__contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: rgba(249, 249, 249, 0.7);
}

.footer__contact-icon {
    color: var(--color-royal-gold);
    flex-shrink: 0;
}

.footer__bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(249, 249, 249, 0.1);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.footer__copyright {
    color: rgba(249, 249, 249, 0.5);
    font-size: 0.9rem;
}

.footer__legal-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer__legal-link {
    color: rgba(249, 249, 249, 0.5);
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

.footer__legal-link:hover {
    color: var(--color-royal-gold);
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

/* ========================================
   UTILITAIRES
   ======================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-accent { color: var(--color-royal-gold); }
.text-muted { color: var(--color-text-muted); }

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

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   ACCESSIBILITÉ
   ======================================== */
:focus-visible {
    outline: 2px solid var(--color-royal-gold);
    outline-offset: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-deep-noir);
    color: var(--color-ivory-silk);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 10001;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --spacing-xl: 2.5rem;
        --spacing-xxl: 4rem;
    }

    .header__nav-list {
        gap: var(--spacing-md);
    }

    .header__nav-link {
        font-size: 0.8rem;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-xxl: 3rem;
    }

    .header__nav {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .header__logo svg {
        width: 180px;
        height: 54px;
    }

    .hero__title {
        letter-spacing: 0.05em;
    }

    .section__title {
        letter-spacing: 0.05em;
    }

    .cards {
        grid-template-columns: 1fr;
    }

    .footer__bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ========================================
   IMPRESSION
   ======================================== */
@media print {
    .header,
    .footer,
    .btn,
    .theme-toggle {
        display: none;
    }

    body {
        color: #000;
        background: #fff;
    }
}