/* ============================================================
   PLOMBIER URGENCE LAUSANNE — Stylesheet
   Palette : Bleu professionnel + Orange urgence + Blanc neutre
   Mobile-first · CSS Variables · Zero dependency
   ============================================================ */

:root {
  /* Palette */
  --color-primary:       #0A4F8B;   /* Bleu plomberie profond */
  --color-primary-dark:  #063761;   /* Hover/active */
  --color-primary-light: #1A6EBF;   /* Accents */
  --color-accent:        #F57C00;   /* Orange urgence */
  --color-accent-dark:   #E65100;   /* Hover accent */
  --color-white:         #FFFFFF;
  --color-bg:            #F5F7FA;
  --color-bg-alt:        #EAF0FA;   /* Section alternée */
  --color-text:          #1A1A2E;
  --color-text-muted:    #5A6880;
  --color-border:        #D0DCF0;
  --color-success:       #2E7D32;

  /* Urgence */
  --color-urgency-bg:    #C62828;
  --color-urgency-text:  #FFFFFF;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  6rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Shadows */
  --shadow-sm: 0 1px 4px rgba(10,79,139,0.08);
  --shadow-md: 0 4px 20px rgba(10,79,139,0.14);
  --shadow-lg: 0 12px 40px rgba(10,79,139,0.18);

  /* Transitions */
  --transition: 0.22s ease;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea, select { font-family: inherit; }

/* ── CONTAINER ── */
.container {
  width: 100%;
  max-width: 1140px;
  margin-inline: auto;
  padding-inline: var(--space-sm);
}

/* ── URGENCY BAR ── */
.urgency-bar {
  background: var(--color-urgency-bg);
  color: var(--color-urgency-text);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: 0.55rem var(--space-sm);
  font-size: 0.82rem;
  font-weight: 600;
  flex-wrap: wrap;
  text-align: center;
}
.urgency-cta {
  background: var(--color-white);
  color: var(--color-urgency-bg);
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.85rem;
  transition: opacity var(--transition);
}
.urgency-cta:hover { opacity: 0.85; }

/* ── HEADER ── */
.site-header {
  background: var(--color-white);
  border-bottom: 2px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-block: 0.9rem;
  flex-wrap: wrap;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.logo-icon { font-size: 2rem; }
.logo-name {
  display: block;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.logo-tagline {
  display: block;
  font-size: 0.72rem;
  color: var(--color-text-muted);
  font-weight: 500;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}
.main-nav a {
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
  transition: background var(--transition), color var(--transition);
}
.main-nav a:hover { background: var(--color-bg); color: var(--color-primary); }
.main-nav .nav-cta {
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 999px;
  padding: 0.5rem 1.2rem;
}
.main-nav .nav-cta:hover { background: var(--color-accent-dark); color: var(--color-white); }

/* ── HERO ── */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(6,55,97,0.88) 0%,
    rgba(10,79,139,0.75) 50%,
    rgba(10,79,139,0.40) 100%
  );
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  color: var(--color-white);
  padding-block: var(--space-xl);
  max-width: 680px;
}
.hero-badge {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  margin-bottom: var(--space-sm);
}
.hero-title {
  font-size: clamp(2rem, 6vw, 3.4rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}
.hero-title em {
  font-style: normal;
  color: var(--color-accent);
}
.hero-subtitle {
  font-size: clamp(0.98rem, 2.2vw, 1.15rem);
  opacity: 0.9;
  max-width: 520px;
  margin-bottom: var(--space-md);
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}
.hero-trust {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  font-size: 0.82rem;
  font-weight: 600;
  opacity: 0.88;
}
.hero-trust span {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-align: center;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
  box-shadow: 0 4px 18px rgba(245,124,0,0.35);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245,124,0,0.45);
}
.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.6);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--color-white);
}
.btn-full { width: 100%; }

/* ── SECTION BASE ── */
.section { padding-block: var(--space-lg); }
.section--alt { background: var(--color-bg-alt); }

.section-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.02em;
}
.section-title::after {
  content: '';
  display: block;
  width: 56px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 999px;
  margin: 0.6rem auto 0;
}
.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 540px;
  margin-inline: auto;
  margin-bottom: var(--space-md);
  line-height: 1.7;
}

/* ── SERVICES ── */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}
.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.service-icon {
  font-size: 2.4rem;
  margin-bottom: 0.75rem;
}
.service-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}
.service-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}
.service-tag {
  display: inline-block;
  background: var(--color-bg-alt);
  color: var(--color-primary);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
}

/* ── WHY ── */
.why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}
.why-item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 4px solid var(--color-primary);
  transition: box-shadow var(--transition);
}
.why-item:hover { box-shadow: var(--shadow-md); }
.why-icon { font-size: 2.2rem; }
.why-item h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
}
.why-item p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}
.why-item strong { color: var(--color-primary); }

/* ── CONTACT ── */
.contact { background: var(--color-primary); }
.contact .section-title { color: var(--color-white); }
.contact .section-title::after { background: var(--color-accent); }
.contact .section-subtitle { color: rgba(255,255,255,0.75); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 1rem 1.2rem;
  color: var(--color-white);
}
.contact-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 0.1rem; }
.contact-item strong {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.7;
  margin-bottom: 0.2rem;
}
.contact-item a {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  text-decoration: underline;
}
.contact-item a:hover { opacity: 0.85; }
.contact-item span { font-size: 0.95rem; }

/* Form */
.contact-form {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: var(--shadow-lg);
}
.contact-form label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(10,79,139,0.12);
}

/* ── FOOTER ── */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.7);
  padding-block: var(--space-md);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-align: center;
}
.footer-logo {
  font-size: 1rem;
  color: var(--color-white);
}
.footer-legal {
  font-size: 0.78rem;
  line-height: 1.65;
  max-width: 700px;
  margin-inline: auto;
}
.footer-credits {
  font-size: 0.72rem;
  opacity: 0.6;
}
.footer-credits a {
  color: var(--color-white);
  text-decoration: underline;
}
.footer-credits a:hover { opacity: 0.8; }

/* ── MEDIA QUERIES ── */
@media (min-width: 480px) {
  .urgency-bar { font-size: 0.88rem; }
  .logo-name { font-size: 1.15rem; }
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-md); }

  .header-inner { flex-wrap: nowrap; }
  .main-nav { gap: 0.4rem; }

  .hero { min-height: 90vh; }
  .hero-content { padding-block: var(--space-xl); }

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

  .section { padding-block: 5rem; }
}

@media (min-width: 1024px) {
  .hero-content { max-width: 720px; }
  .contact-grid { grid-template-columns: 5fr 7fr; }
}

/* ── FOCUS ACCESSIBILITY ── */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ── SCROLL REVEAL SUBTLETY ── */
@media (prefers-reduced-motion: no-preference) {
  .service-card,
  .why-item {
    animation: fadeUp 0.45s ease both;
  }
  .service-card:nth-child(2) { animation-delay: 0.1s; }
  .service-card:nth-child(3) { animation-delay: 0.2s; }
  .why-item:nth-child(2)     { animation-delay: 0.1s; }
  .why-item:nth-child(3)     { animation-delay: 0.2s; }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}