/* ═══════════════════════════════════════════════
   CULTIVER L'EAU — Styles
   ═══════════════════════════════════════════════ */

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

:root {
  --water-deep: #1a3a4a;
  --water-mid: #2d6a7a;
  --water-light: #5ba4b5;
  --water-pale: #d0eef5;
  --earth-dark: #3d2b1f;
  --earth-mid: #6b4c3b;
  --earth-light: #a0785a;
  --earth-pale: #e8ddd0;
  --green-dark: #2d5a3d;
  --green-mid: #4a8c5c;
  --green-light: #7bc47f;
  --sand: #f5f0e8;
  --cream: #faf8f4;
  --text: #1a1a1a;
  --text-muted: #5a5a5a;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(26,58,74,0.08);
  --shadow-hover: 0 12px 40px rgba(26,58,74,0.15);
  --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--cream);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ─── HERO ─── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 120% 80% at 50% 100%, rgba(93,164,181,0.15), transparent),
    radial-gradient(ellipse 80% 60% at 20% 20%, rgba(74,140,92,0.1), transparent);
  z-index: 0;
}

.hero-content { position: relative; z-index: 1; max-width: 800px; }

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: var(--water-pale);
  color: var(--water-deep);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 1.05;
  color: var(--water-deep);
  margin-bottom: 1.5rem;
}

.hero h1 .accent {
  color: var(--water-mid);
  position: relative;
}

.hero h1 .accent::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 8px;
  background: var(--water-light);
  opacity: 0.3;
  border-radius: 4px;
}

.hero p {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  font-weight: 300;
}

.hero-scroll {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--water-mid);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  animation: bounce 2.5s infinite;
}

.hero-scroll:hover { color: var(--water-deep); }

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ─── WATER DROPS ─── */
.drops {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.drop {
  position: absolute;
  width: 6px;
  height: 10px;
  background: var(--water-light);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  opacity: 0;
  animation: fall linear infinite;
}

@keyframes fall {
  0% { opacity: 0; transform: translateY(-20px) scale(0.8); }
  10% { opacity: 0.25; }
  90% { opacity: 0.25; }
  100% { opacity: 0; transform: translateY(100vh) scale(0.6); }
}

/* ─── PRINCIPLE SECTION ─── */
.principle {
  padding: 6rem 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.principle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}

.principle-card {
  background: white;
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.principle-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.principle-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
}

.principle-icon.water { background: var(--water-pale); }
.principle-icon.earth { background: var(--earth-pale); }
.principle-icon.green { background: #d4edda; }

.principle-card h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 1.3rem;
  margin-bottom: 0.6rem;
  color: var(--water-deep);
}

.principle-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ─── SECTION TITLES ─── */
.section-title {
  text-align: center;
  padding: 0 2rem;
  margin-bottom: 1rem;
}

.section-title h2 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--water-deep);
  margin-bottom: 0.8rem;
}

.section-title p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  font-weight: 300;
}

/* ─── FILTER ─── */
.filter-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0 2rem 3rem;
  max-width: 900px;
  margin: 0 auto;
}

.filter-btn {
  padding: 0.5rem 1.2rem;
  border: 1.5px solid #d0d0d0;
  background: white;
  border-radius: 100px;
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--water-deep);
  color: white;
  border-color: var(--water-deep);
}

/* ─── CARDS GRID ─── */
.cards-section {
  padding: 0 2rem 6rem;
  max-width: 1300px;
  margin: 0 auto;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.8rem;
}

.card {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.card-header {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.card-visual {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  transition: var(--transition);
}

.card:hover .card-visual { transform: scale(1.05); }

.card-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.card-tag.jardin { background: rgba(74,140,92,0.2); color: var(--green-dark); }
.card-tag.urban { background: rgba(45,106,122,0.2); color: var(--water-deep); }
.card-tag.sol { background: rgba(107,76,59,0.2); color: var(--earth-dark); }
.card-tag.amenagement { background: rgba(160,120,90,0.2); color: var(--earth-dark); }

.card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }

.card-body h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 1.35rem;
  color: var(--water-deep);
  margin-bottom: 0.6rem;
}

.card-body .subtitle {
  font-size: 0.8rem;
  color: var(--earth-light);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.card-body p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.card-footer {
  padding: 0 1.5rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--water-mid);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: var(--transition);
}

.card-link:hover { color: var(--water-deep); gap: 0.5rem; }

/* ─── MODAL ─── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26,58,74,0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active { opacity: 1; pointer-events: all; }

.modal {
  background: white;
  border-radius: var(--radius);
  max-width: 680px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
  transform: translateY(30px) scale(0.95);
  transition: transform 0.3s ease;
}

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

.modal-visual {
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.9);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover { background: white; transform: scale(1.1); }

.modal-content { padding: 2rem 2.5rem 2.5rem; }

.modal-content h2 {
  font-family: 'DM Serif Display', serif;
  font-size: 2rem;
  color: var(--water-deep);
  margin-bottom: 0.4rem;
}

.modal-content .modal-subtitle {
  font-size: 0.85rem;
  color: var(--earth-light);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1.2rem;
}

.modal-content p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 1.2rem;
}

.modal-content h4 {
  font-family: 'DM Serif Display', serif;
  color: var(--water-deep);
  font-size: 1.15rem;
  margin: 1.5rem 0 0.6rem;
}

.modal-content ul {
  padding-left: 1.2rem;
  margin-bottom: 1.2rem;
}

.modal-content li {
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 0.3rem;
  font-size: 0.95rem;
}

.modal-source {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1.2rem;
  background: var(--water-pale);
  color: var(--water-deep);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
}

.modal-source:hover { background: var(--water-light); color: white; }

/* ─── SOURCES ─── */
.sources {
  padding: 4rem 2rem 6rem;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.sources h2 {
  font-family: 'DM Serif Display', serif;
  font-size: 2rem;
  color: var(--water-deep);
  margin-bottom: 1.5rem;
}

.sources-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
}

.sources-list a {
  padding: 0.5rem 1rem;
  background: white;
  border: 1px solid #e0e0e0;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.sources-list a:hover {
  border-color: var(--water-mid);
  color: var(--water-deep);
  box-shadow: var(--shadow);
}

/* ─── FOOTER ─── */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid #e8e4de;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .principle-grid { grid-template-columns: 1fr; }
  .cards-grid { grid-template-columns: 1fr; }
  .modal-content { padding: 1.5rem; }
  .modal-content h2 { font-size: 1.6rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2.5rem; }
  .filter-bar { gap: 0.4rem; }
  .filter-btn { font-size: 0.78rem; padding: 0.4rem 0.9rem; }
}

/* ─── ANIMATIONS ─── */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}