/* =========================================================
   IUSolutions — style.css
   Direction artistique : "Plan de chantier / Bleu d'architecte"
   ========================================================= */

:root {
  /* Palette stricte — ne pas ajouter de couleurs */
  --color-blueprint: #1B3A5C;
  --color-tracing: #EDF3F7;
  --color-graphite: #2B2E33;
  --color-chalk: #F7F7F5;
  --color-orange: #E8590C;

  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;

  --container-width: 1140px;
  --transition: all 0.3s ease;

  --font-display: 'Archivo', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, Segoe UI, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--color-chalk);
  color: var(--color-graphite);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

h1, h2, h3 {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}

/* ---------- Utility: mono / technical labels ---------- */

.label-mono {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(27, 58, 92, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(247, 247, 245, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-chalk);
  letter-spacing: -0.01em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.92rem;
  font-weight: 500;
}

.main-nav a {
  color: rgba(247, 247, 245, 0.75);
  transition: var(--transition);
}

.main-nav a:hover {
  color: var(--color-chalk);
}

.nav-cta {
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--color-orange);
  color: var(--color-chalk) !important;
}

.nav-cta:hover {
  background: #ff6c1f;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-body);
}

.btn-primary {
  background: var(--color-orange);
  color: var(--color-chalk);
  box-shadow: 0 8px 22px rgba(232, 89, 12, 0.35);
}

.btn-primary:hover {
  background: #ff6c1f;
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(232, 89, 12, 0.45);
}

.btn-outline {
  background: transparent;
  border-color: rgba(43, 46, 51, 0.3);
  color: var(--color-graphite);
}

.btn-outline:hover {
  background: rgba(43, 46, 51, 0.06);
  transform: translateY(-2px);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background: var(--color-blueprint);
  color: var(--color-chalk);
  padding: 140px 0 90px;
  overflow: hidden;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(247, 247, 245, 0.07) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, rgba(247, 247, 245, 0.07) 0 1px, transparent 1px 40px);
}

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

.hero-drag-hint {
  color: rgba(247, 247, 245, 0.65);
  margin-bottom: 14px;
}

.hero-content h1 {
  font-size: clamp(1.9rem, 4.4vw, 2.9rem);
  font-weight: 800;
  line-height: 1.18;
  margin: 30px auto 18px;
  max-width: 760px;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: rgba(247, 247, 245, 0.78);
  margin: 0 auto 30px;
  max-width: 540px;
}

/* ---------- Compare card (carte de verre épaisse flottante) ---------- */

.compare-card {
  position: relative;
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 6px;
  border-radius: 20px;
  background: rgba(247, 247, 245, 0.08);
  border: 1px solid rgba(247, 247, 245, 0.25);
  backdrop-filter: blur(26px) saturate(1.15);
  -webkit-backdrop-filter: blur(26px) saturate(1.15);
  box-shadow:
    0 2px 4px rgba(0, 0, 0, 0.25),
    0 16px 32px rgba(0, 0, 0, 0.35),
    0 50px 100px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(247, 247, 245, 0.45),
    inset 0 -1px 0 rgba(0, 0, 0, 0.3);
}

.compare-card::before {
  content: "";
  position: absolute;
  inset: -24px;
  z-index: -1;
  border-radius: 32px;
  background: radial-gradient(circle at 50% 25%, rgba(247, 247, 245, 0.18), transparent 70%);
  filter: blur(28px);
}

/* ---------- Compare slider (avant / après) ---------- */

.compare-slider {
  position: relative;
  width: 100%;
  aspect-ratio: 1918 / 910;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(247, 247, 245, 0.2);
  cursor: default;
  touch-action: none;
  user-select: none;
}

.compare-slider:focus-visible {
  outline: 2px solid var(--color-orange);
  outline-offset: 3px;
}

.compare-image {
  position: absolute;
  inset: 0;
}

.compare-after {
  z-index: 1;
}

.compare-before {
  z-index: 2;
  clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
}

.compare-tag {
  position: absolute;
  top: 12px;
  z-index: 4;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 4px 9px;
  border-radius: 4px;
  background: rgba(27, 58, 92, 0.85);
  color: var(--color-chalk);
}

.compare-tag--before {
  left: 12px;
}

.compare-tag--after {
  right: 12px;
}

.compare-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.compare-handle-line {
  position: absolute;
  left: 0;
  top: -10px;
  bottom: -10px;
  width: 5px;
  border-radius: 999px;
  transform: translateX(-2.5px) rotate(5deg);
  transform-origin: center;
  background: linear-gradient(
    180deg,
    rgba(247, 247, 245, 0) 0%,
    var(--color-chalk) 12%,
    var(--color-chalk) 88%,
    rgba(247, 247, 245, 0) 100%
  );
  box-shadow:
    0 0 10px rgba(247, 247, 245, 0.85),
    0 0 26px rgba(247, 247, 245, 0.45);
}

/* ---------- Captures avant / après ---------- */

.compare-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

/* ---------- Sections generic ---------- */

.section {
  padding: 100px 0;
  position: relative;
}

.section-kicker {
  color: var(--color-orange);
  margin-bottom: 12px;
}

.section-kicker--light {
  color: rgba(247, 247, 245, 0.85);
}

.section-title {
  font-size: clamp(1.7rem, 3.2vw, 2.3rem);
  font-weight: 800;
  margin-bottom: 14px;
}

.section-title--light {
  color: var(--color-chalk);
}

.section-subtitle {
  color: rgba(43, 46, 51, 0.65);
  font-size: 1.02rem;
  max-width: 560px;
  margin-bottom: 48px;
}

.section-subtitle--light {
  color: rgba(247, 247, 245, 0.75);
}

/* Reveal-on-scroll base state */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Ruler strip (motif technique de transition) ---------- */

.ruler-strip {
  height: 14px;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(43, 46, 51, 0.35) 0 1px,
    transparent 1px 16px
  );
  background-position: bottom;
}

.ruler-strip--dark {
  background-color: var(--color-chalk);
}

/* ---------- Diagnostic ---------- */

.diagnostic {
  background: var(--color-tracing);
}

.diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.diagnostic-item {
  position: relative;
  padding: 26px 24px;
  background: var(--color-chalk);
  border: 1px solid rgba(43, 46, 51, 0.1);
}

.diagnostic-item::before,
.diagnostic-item::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--color-blueprint);
}

.diagnostic-item::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid;
  border-left: 2px solid;
}

.diagnostic-item::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid;
  border-right: 2px solid;
}

.diagnostic-tag {
  color: var(--color-orange);
  display: block;
  margin-bottom: 10px;
}

.diagnostic-item h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.diagnostic-item p {
  color: rgba(43, 46, 51, 0.68);
  font-size: 0.92rem;
}

/* ---------- Plan (réalisations) / Glass cards ---------- */

.plan {
  background: var(--color-blueprint);
  color: var(--color-chalk);
}

.blueprint-grid-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(247, 247, 245, 0.05) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, rgba(247, 247, 245, 0.05) 0 1px, transparent 1px 40px);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.glass-card {
  display: block;
  background: rgba(237, 243, 247, 0.08);
  border: 1px solid rgba(247, 247, 245, 0.18);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}

.glass-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
  background: rgba(237, 243, 247, 0.13);
  border-color: rgba(247, 247, 245, 0.32);
}

.glass-card--placeholder {
  cursor: default;
}

.glass-card--placeholder:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.25);
}

.card-mockup {
  padding: 16px;
}

.mini-mockup {
  border-radius: var(--radius-sm);
  border: 1px solid rgba(247, 247, 245, 0.16);
  background: linear-gradient(155deg, rgba(247, 247, 245, 0.1), rgba(247, 247, 245, 0.02));
  padding: 12px;
  height: 160px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mini-mockup-topbar {
  width: 36%;
  height: 7px;
  border-radius: 4px;
  background: rgba(247, 247, 245, 0.35);
}

.mini-mockup-hero {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mini-mockup-line {
  display: block;
  border-radius: 4px;
  background: rgba(247, 247, 245, 0.3);
}

.mini-mockup-line--lg {
  width: 78%;
  height: 11px;
}

.mini-mockup-line--sm {
  width: 52%;
  height: 7px;
  background: rgba(247, 247, 245, 0.18);
}

.mini-mockup-cta {
  width: 54px;
  height: 12px;
  border-radius: 999px;
  background: var(--color-orange);
  margin-top: 2px;
}

.mini-mockup-blocks {
  display: flex;
  gap: 8px;
  margin-top: auto;
}

.mini-mockup-blocks span {
  flex: 1;
  height: 30px;
  border-radius: 6px;
  background: rgba(247, 247, 245, 0.12);
}

.card-body {
  padding: 4px 22px 26px;
}

.card-tag {
  color: rgba(247, 247, 245, 0.55);
  display: block;
  margin-bottom: 10px;
}

.card-body h3 {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.card-body p {
  color: rgba(247, 247, 245, 0.68);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.card-link {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--color-chalk);
}

.card-link--muted {
  color: rgba(247, 247, 245, 0.4);
}

/* ---------- Livraison / Pricing ---------- */

.livraison {
  background: var(--color-tracing);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.pricing-card {
  position: relative;
  background: var(--color-chalk);
  border: 1px solid rgba(43, 46, 51, 0.12);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 36px rgba(27, 58, 92, 0.18);
}

.pricing-card--highlight {
  border-color: var(--color-blueprint);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 26px;
  background: var(--color-blueprint);
  color: var(--color-chalk);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
}

.pricing-tag {
  color: var(--color-orange);
  display: block;
  margin-bottom: 16px;
}

.pricing-price {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.pricing-maintenance {
  color: rgba(43, 46, 51, 0.6);
  font-size: 0.86rem;
  margin-bottom: 18px;
}

.pricing-desc {
  color: rgba(43, 46, 51, 0.68);
  font-size: 0.94rem;
  margin-bottom: 20px;
}

.pricing-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.pricing-list li {
  font-size: 0.9rem;
  padding-left: 20px;
  position: relative;
  color: rgba(43, 46, 51, 0.7);
}

.pricing-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-blueprint);
  font-weight: 700;
}

.pricing-card .btn {
  align-self: flex-start;
}

.pricing-note {
  margin-top: 40px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: rgba(43, 46, 51, 0.5);
  text-align: center;
}

/* ---------- À propos ---------- */

.apropos {
  background: var(--color-chalk);
}

.apropos-content {
  max-width: 700px;
}

.apropos-text {
  color: rgba(43, 46, 51, 0.72);
  font-size: 1.04rem;
}

/* ---------- Contact ---------- */

.contact {
  background: var(--color-blueprint);
  color: var(--color-chalk);
}

.contact-content {
  max-width: 620px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-row label {
  font-size: 0.88rem;
  font-weight: 600;
  color: rgba(247, 247, 245, 0.78);
}

.optional {
  font-weight: 400;
  color: rgba(247, 247, 245, 0.45);
}

.form-row input,
.form-row textarea {
  background: rgba(247, 247, 245, 0.08);
  border: 1px solid rgba(247, 247, 245, 0.22);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--color-chalk);
  font-family: inherit;
  font-size: 0.98rem;
  resize: vertical;
  transition: var(--transition);
}

.form-row input::placeholder,
.form-row textarea::placeholder {
  color: rgba(247, 247, 245, 0.4);
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-orange);
  background: rgba(247, 247, 245, 0.12);
}

.contact-form .btn {
  align-self: flex-start;
  margin-top: 6px;
}

.form-feedback {
  font-size: 0.9rem;
  font-weight: 600;
  min-height: 1.2em;
}

.form-feedback.success {
  color: #7fd9c4;
}

.form-feedback.error {
  color: #ff9b7a;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid rgba(247, 247, 245, 0.12);
  padding: 26px 0;
  background: var(--color-blueprint);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(247, 247, 245, 0.55);
}

.footer-logo {
  font-family: var(--font-display);
  font-weight: 700;
  color: rgba(247, 247, 245, 0.85);
}

.footer-link {
  color: rgba(247, 247, 245, 0.75);
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--color-chalk);
}

/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 900px) {
  .cards-grid,
  .pricing-grid,
  .diagnostic-grid {
    grid-template-columns: 1fr;
  }

  .main-nav {
    gap: 16px;
    font-size: 0.85rem;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 70px 0;
  }

  .hero {
    padding: 120px 0 70px;
  }

  .compare-card {
    padding: 4px;
    border-radius: 16px;
  }

  .compare-slider {
    aspect-ratio: 4 / 3;
  }

  .main-nav a:not(.nav-cta) {
    display: none;
  }

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

  /* Réduit le coût du flou sur mobile pour un scroll fluide */
  .glass-card,
  .site-header {
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
  }
}