/* ==========================================================================
   SANI ECO - Mobile-First CSS
   Optimisé conversion appels téléphoniques
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-primary: #0066CC;
    --color-primary-dark: #0052A3;
    --color-primary-light: #E6F0FA;
    --color-urgence: #DC2626;
    --color-urgence-dark: #B91C1C;
    --color-success: #059669;
    --color-warning: #F59E0B;

    /* Neutrals */
    --color-text: #1F2937;
    --color-text-light: #6B7280;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F9FAFB;
    --color-border: #E5E7EB;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --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;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
}

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

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-bottom: 80px; /* Space for sticky button */
}

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

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

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

ul {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 600;
    color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.section-subtitle {
    color: var(--color-text-light);
    margin-top: var(--space-sm);
    margin-bottom: var(--space-xl);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

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

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

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

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

.btn-large {
    padding: var(--space-lg) var(--space-xl);
    font-size: var(--font-size-lg);
}

.btn-urgence {
    background-color: var(--color-urgence);
    color: white;
    padding: var(--space-lg) var(--space-xl);
    font-size: var(--font-size-lg);
}

.btn-urgence:hover {
    background-color: var(--color-urgence-dark);
    color: white;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

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

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.nav-desktop {
    display: none;
}

.nav-desktop a {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
}

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

.btn-header-call {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition-base);
}

.nav-mobile {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
    box-shadow: var(--shadow-lg);
}

.nav-mobile.active {
    display: block;
}

.nav-mobile a {
    display: block;
    padding: var(--space-md);
    color: var(--color-text);
    font-weight: 500;
    border-bottom: 1px solid var(--color-border);
}

.nav-mobile a:last-of-type {
    border-bottom: none;
}

.nav-mobile-lang {
    display: flex;
    gap: var(--space-md);
    padding-top: var(--space-md);
    margin-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.nav-mobile-lang a {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.nav-mobile-lang a.active {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
    padding: var(--space-2xl) 0;
    background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 100%);
}

.hero-content {
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    background-color: var(--color-success);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
}

.hero h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
}

.hero h1 strong {
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    margin-bottom: var(--space-xl);
}

.hero-cta .btn {
    width: 100%;
    max-width: 320px;
}

.hero-trust {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: center;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.trust-item .icon {
    color: var(--color-success);
}

/* --------------------------------------------------------------------------
   Reassurance Bar
   -------------------------------------------------------------------------- */
.reassurance-bar {
    background-color: var(--color-text);
    color: white;
    padding: var(--space-lg) 0;
}

.reassurance-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.reassurance-item {
    text-align: center;
    padding: var(--space-sm);
}

.reassurance-item strong {
    display: block;
    font-size: var(--font-size-lg);
}

.reassurance-item span {
    font-size: var(--font-size-xs);
    opacity: 0.8;
}

/* --------------------------------------------------------------------------
   Services
   -------------------------------------------------------------------------- */
.services {
    padding: var(--space-2xl) 0;
}

.services h2 {
    text-align: center;
    font-size: var(--font-size-2xl);
}

.services .section-subtitle {
    text-align: center;
}

.services-grid {
    display: grid;
    gap: var(--space-lg);
}

.service-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: box-shadow var(--transition-base);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-lg);
    background-color: var(--color-primary-light);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon svg {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.service-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
}

.service-card ul {
    text-align: left;
    margin-bottom: var(--space-lg);
}

.service-card li {
    padding: var(--space-sm) 0;
    padding-left: var(--space-lg);
    position: relative;
    color: var(--color-text-light);
}

.service-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 600;
}

/* --------------------------------------------------------------------------
   Why Us
   -------------------------------------------------------------------------- */
.why-us {
    padding: var(--space-2xl) 0;
    background-color: var(--color-bg-alt);
}

.why-us h2 {
    text-align: center;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-xl);
}

.why-grid {
    display: grid;
    gap: var(--space-lg);
}

.why-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.why-number {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    background-color: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.why-content h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-xs);
}

.why-content p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   Process
   -------------------------------------------------------------------------- */
.process {
    padding: var(--space-2xl) 0;
}

.process h2 {
    text-align: center;
    font-size: var(--font-size-2xl);
}

.process .section-subtitle {
    text-align: center;
}

.process-grid {
    display: grid;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.process-step {
    text-align: center;
}

.process-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-md);
    background-color: var(--color-primary-light);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.process-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.process-step h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
}

.process-step p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.process-cta {
    text-align: center;
}

/* --------------------------------------------------------------------------
   Urgence Block
   -------------------------------------------------------------------------- */
.urgence-block {
    padding: var(--space-2xl) 0;
    background: linear-gradient(135deg, var(--color-urgence) 0%, var(--color-urgence-dark) 100%);
    color: white;
}

.urgence-content {
    text-align: center;
}

.urgence-icon {
    margin-bottom: var(--space-lg);
}

.urgence-icon svg {
    width: 48px;
    height: 48px;
    margin: 0 auto;
}

.urgence-text h2 {
    color: white;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
}

.urgence-text p {
    opacity: 0.9;
    margin-bottom: var(--space-md);
}

.urgence-content .btn-urgence {
    background-color: white;
    color: var(--color-urgence);
    margin-top: var(--space-lg);
}

.urgence-content .btn-urgence:hover {
    background-color: var(--color-bg-alt);
}

/* --------------------------------------------------------------------------
   Reviews
   -------------------------------------------------------------------------- */
.reviews {
    padding: var(--space-2xl) 0;
    background-color: var(--color-bg-alt);
}

.reviews-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.reviews-header h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
}

.reviews-rating {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.stars {
    display: flex;
    gap: 2px;
}

.stars svg {
    width: 20px;
    height: 20px;
    color: var(--color-warning);
}

.reviews-grid {
    display: grid;
    gap: var(--space-lg);
}

.review-card {
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.review-stars {
    display: flex;
    gap: 2px;
    margin-bottom: var(--space-md);
}

.review-stars svg {
    width: 16px;
    height: 16px;
    color: var(--color-warning);
}

.review-text {
    font-style: italic;
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

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

.review-author strong {
    color: var(--color-text);
}

.review-author span {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Zones
   -------------------------------------------------------------------------- */
.zones {
    padding: var(--space-2xl) 0;
}

.zones h2 {
    text-align: center;
    font-size: var(--font-size-2xl);
}

.zones .section-subtitle {
    text-align: center;
}

.zones-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.zone-item {
    background-color: var(--color-bg-alt);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.zone-item h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-xs);
}

.zone-item p {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

.link-more {
    display: block;
    text-align: center;
    font-weight: 500;
}

/* --------------------------------------------------------------------------
   Final CTA
   -------------------------------------------------------------------------- */
.final-cta {
    padding: var(--space-2xl) 0;
    background-color: var(--color-primary);
    color: white;
    text-align: center;
}

.final-cta h2 {
    color: white;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
}

.final-cta p {
    opacity: 0.9;
    margin-bottom: var(--space-xl);
}

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

.final-cta .btn-primary:hover {
    background-color: var(--color-bg-alt);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    background-color: var(--color-text);
    color: white;
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-grid {
    display: grid;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.footer-col h4 {
    color: white;
    font-size: var(--font-size-base);
    margin-bottom: var(--space-md);
}

.footer-col ul li {
    margin-bottom: var(--space-sm);
}

.footer-col a {
    color: rgba(255,255,255,0.8);
    font-size: var(--font-size-sm);
}

.footer-col a:hover {
    color: white;
}

.footer-col p {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.footer-phone {
    font-size: var(--font-size-lg) !important;
    font-weight: 600;
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: center;
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    opacity: 0.6;
}

.footer-lang {
    display: flex;
    gap: var(--space-sm);
}

.footer-lang a {
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,0.6);
    font-size: var(--font-size-sm);
}

.footer-lang a.active {
    background-color: white;
    color: var(--color-text);
    border-color: white;
}

/* --------------------------------------------------------------------------
   Sticky Call Button
   -------------------------------------------------------------------------- */
.sticky-call {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-md);
    background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.05) 100%);
    z-index: 99;
}

.btn-sticky-call {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-lg);
    background-color: var(--color-success);
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 700;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    transition: all var(--transition-base);
}

.btn-sticky-call:hover {
    background-color: #047857;
    color: white;
}

.btn-sticky-call svg {
    width: 24px;
    height: 24px;
}

/* --------------------------------------------------------------------------
   Page: Services (Plomberie / Chauffage)
   -------------------------------------------------------------------------- */
.page-hero {
    padding: var(--space-2xl) 0;
    background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 100%);
    text-align: center;
}

.page-hero h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
}

.page-hero p {
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.service-section {
    padding: var(--space-2xl) 0;
}

.service-section:nth-child(even) {
    background-color: var(--color-bg-alt);
}

.problems-grid {
    display: grid;
    gap: var(--space-md);
}

.problem-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md);
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.problem-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    background-color: var(--color-urgence);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.problem-icon svg {
    width: 20px;
    height: 20px;
}

.problem-item h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-xs);
}

.problem-item p {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.brands-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
}

.brand-tag {
    padding: var(--space-sm) var(--space-md);
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* FAQ */
.faq-list {
    display: grid;
    gap: var(--space-md);
}

.faq-item {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--space-md);
    background: none;
    border: none;
    text-align: left;
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 var(--space-md) var(--space-md);
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.faq-item.active .faq-answer {
    display: block;
}

/* --------------------------------------------------------------------------
   Desktop Styles (768px+)
   -------------------------------------------------------------------------- */
@media (min-width: 768px) {
    body {
        padding-bottom: 0;
    }

    /* Header */
    .nav-desktop {
        display: flex;
        gap: var(--space-md);
    }

    .nav-toggle {
        display: none;
    }

    .header-cta {
        display: flex;
        align-items: center;
        gap: var(--space-md);
    }

    /* Hero */
    .hero {
        padding: var(--space-3xl) 0;
    }

    .hero h1 {
        font-size: var(--font-size-4xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .hero-cta .btn {
        width: auto;
    }

    .hero-trust {
        flex-direction: row;
        justify-content: center;
        gap: var(--space-xl);
    }

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

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

    /* Why Us */
    .why-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    /* Zones */
    .zones-list {
        grid-template-columns: repeat(4, 1fr);
    }

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

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }

    /* Sticky Call - Hide on desktop */
    .sticky-call {
        display: none;
    }

    /* Page Hero */
    .page-hero h1 {
        font-size: var(--font-size-3xl);
    }

    /* Problems Grid */
    .problems-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* --------------------------------------------------------------------------
   Large Desktop (1024px+)
   -------------------------------------------------------------------------- */
@media (min-width: 1024px) {
    .container {
        padding: 0 var(--space-xl);
    }

    .hero h1 {
        font-size: 3rem;
    }

    .services h2,
    .why-us h2,
    .process h2,
    .reviews-header h2,
    .zones h2,
    .final-cta h2 {
        font-size: var(--font-size-3xl);
    }
}

/* --------------------------------------------------------------------------
   Accessibility
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Screen reader only */
.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;
}