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

:root {
  --clr-bg: #f5f9f5;
  --clr-surface: #ffffff;
  --clr-primary: #1a4a2e;
  --clr-primary-light: #2d7a4f;
  --clr-accent: #0077b6;
  --clr-accent-light: #48cae4;
  --clr-text: #1c2b1e;
  --clr-muted: #5a6b5e;
  --clr-border: #d4e6d8;
  --clr-card: #eef5f0;
  --font-sans: system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --radius: 12px;
  --max-w: 1100px;
}

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

body {
  font-family: var(--font-sans);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--clr-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* === Layout === */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

section { padding-block: 4rem; }

/* === Buttons === */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  line-height: 1.2;
}

.btn-primary {
  background: var(--clr-primary);
  color: #fff;
  border-color: var(--clr-primary);
}
.btn-primary:hover { background: var(--clr-primary-light); border-color: var(--clr-primary-light); }

.btn-ghost {
  background: transparent;
  color: var(--clr-primary);
  border-color: var(--clr-primary);
}
.btn-ghost:hover { background: var(--clr-primary); color: #fff; }

.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-full { width: 100%; text-align: center; }

/* === Header === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 249, 245, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--clr-border);
  padding-block: 1rem;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--clr-primary);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.logo span { color: var(--clr-accent); }

.site-header nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-header nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-muted);
  transition: color 0.15s;
}
.site-header nav a:hover { color: var(--clr-primary); }

/* === Hero === */
.hero {
  background: linear-gradient(135deg, #e8f5ec 0%, #d6edf8 100%);
  padding-block: 5rem 4rem;
}

.hero .container {
  display: grid;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 700px) {
  .hero .container { grid-template-columns: 1fr 1fr; }
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--clr-primary);
}

.hero-sub {
  margin-top: 1rem;
  font-size: 1.125rem;
  color: var(--clr-muted);
  max-width: 540px;
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.water-orb {
  width: 280px;
  height: 280px;
  border-radius: 40% 60% 55% 45% / 50% 40% 60% 50%;
  background: linear-gradient(160deg, var(--clr-accent-light) 0%, var(--clr-accent) 55%, var(--clr-primary) 100%);
  opacity: 0.28;
  animation: float 7s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) scale(1);
    border-radius: 40% 60% 55% 45% / 50% 40% 60% 50%;
  }
  50% {
    transform: translateY(-14px) scale(1.04);
    border-radius: 55% 45% 42% 58% / 46% 54% 48% 52%;
  }
}

/* === Products === */
.products { background: var(--clr-surface); }

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--clr-primary);
}

.section-sub {
  margin-top: 0.5rem;
  color: var(--clr-muted);
  font-size: 1.0625rem;
}

.product-grid {
  margin-top: 2.5rem;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .product-grid { grid-template-columns: repeat(3, 1fr); }
}

.product-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  position: relative;
  transition: box-shadow 0.2s, transform 0.2s;
}
.product-card:hover {
  box-shadow: 0 6px 28px rgba(0, 119, 182, 0.12);
  transform: translateY(-2px);
}

.product-card--featured {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
}
.product-card--featured h3,
.product-card--featured p { color: #fff; }
.product-card--featured .product-sizes { color: rgba(255, 255, 255, 0.65); }

.product-badge {
  display: inline-block;
  background: var(--clr-accent-light);
  color: var(--clr-primary);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.product-icon { font-size: 2rem; margin-bottom: 0.75rem; }

.product-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-primary);
}

.product-card p {
  margin-top: 0.5rem;
  color: var(--clr-muted);
  font-size: 0.9375rem;
}

.product-sizes {
  display: block;
  margin-top: 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--clr-muted);
  letter-spacing: 0.05em;
}

/* === Story === */
.story { background: linear-gradient(135deg, #f0f7f2 0%, #e8f4fb 100%); }

.story-grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 700px) {
  .story-grid { grid-template-columns: 1fr 1fr; }
}

.story-text p {
  margin-top: 1rem;
  color: var(--clr-muted);
  font-size: 1.0625rem;
}
.story-text h2 { margin-bottom: 0.25rem; }

.story-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stat {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--clr-primary);
  letter-spacing: -0.03em;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--clr-muted);
  margin-top: 0.25rem;
  line-height: 1.4;
}

/* === Why === */
.why { background: var(--clr-surface); }

.why-grid {
  margin-top: 2.5rem;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .why-grid { grid-template-columns: repeat(3, 1fr); }
}

.why-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
}

.why-icon {
  font-size: 1.75rem;
  margin-bottom: 0.875rem;
  display: block;
}

.why-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--clr-primary);
}

.why-card p {
  margin-top: 0.5rem;
  color: var(--clr-muted);
  font-size: 0.9375rem;
}

/* === FAQ === */
.faq { background: var(--clr-bg); }

.faq-list {
  margin-top: 2rem;
  display: grid;
  gap: 0.75rem;
}

details {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  transition: border-color 0.15s;
}
details[open] { border-color: var(--clr-primary); }

summary {
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  color: var(--clr-primary);
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+";
  font-size: 1.375rem;
  font-weight: 300;
  flex-shrink: 0;
  color: var(--clr-accent);
  line-height: 1;
}
details[open] summary::after { content: "−"; }

details p {
  margin-top: 1rem;
  color: var(--clr-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* === Order / Contact === */
.order {
  background: linear-gradient(135deg, #1a4a2e 0%, #0a2a40 100%);
  color: #fff;
}

.order-box {
  max-width: 580px;
  margin-inline: auto;
  text-align: center;
}

.order h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 800;
  color: #fff;
}

.order > .container > .order-box > p {
  margin-top: 0.75rem;
  color: rgba(255, 255, 255, 0.72);
  font-size: 1.0625rem;
}

.contact-form {
  margin-top: 2rem;
  text-align: left;
  display: grid;
  gap: 1rem;
}

.form-row { display: grid; gap: 0.375rem; }

label {
  font-size: 0.875rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.88);
}

input, textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  color: #fff;
  font-size: 0.9375rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input::placeholder, textarea::placeholder { color: rgba(255, 255, 255, 0.4); }
input:hover, textarea:hover { border-color: rgba(255, 255, 255, 0.45); }
input:focus, textarea:focus {
  border-color: var(--clr-accent-light);
  outline: none;
  box-shadow: 0 0 0 3px rgba(72, 202, 228, 0.28);
}
textarea { resize: vertical; }

.contact-form .btn-primary {
  background: var(--clr-accent-light);
  color: var(--clr-primary);
  border-color: var(--clr-accent-light);
  margin-top: 0.5rem;
  font-size: 1rem;
  padding: 0.875rem;
  font-weight: 700;
}
.contact-form .btn-primary:hover { background: #fff; border-color: #fff; }

/* === Footer === */
.site-footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding-block: 3rem 2rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 700px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

.footer-brand p {
  margin-top: 0.5rem;
  color: var(--clr-muted);
  font-size: 0.9rem;
}

.site-footer nav ul {
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.site-footer nav a {
  color: var(--clr-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
}
.site-footer nav a:hover { color: var(--clr-primary); }

.footer-contact p {
  color: var(--clr-muted);
  font-size: 0.9rem;
  line-height: 2;
}

.footer-copy {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--clr-border);
  font-size: 0.8rem;
  color: var(--clr-muted);
}