:root {
  /* Light defaults */
  --bg: #ffffff;
  --bg-soft: #f4f6f8;
  --text: #0b3d3b;
  --muted: #4a6867;
  --card: #ffffff;
  --border: #e6eceb;
  --shadow: 0 8px 28px rgba(0,0,0,.08);

  /* Accent */
  --accent-from: #12C2C5;
  --accent-to:   #0A6D72;

  --btn-bg: #0f7a80;
  --btn-text: #ffffff;
  --badge: #f6c453;
  --badge-text: #3a2a00;

  --hero-text: #ffffff;
  --link: #0f7a80;
  --link-hover: #0b5a5e;
  --icon: currentColor;
  --modal-backdrop: rgba(3, 22, 22, .6);

  /* Footer */
  --footer-bg: #0b2f2f;
  --footer-text: #e7f4f3;
  --footer-muted: #b9d6d5;
  --footer-border: #134545;
}

html[data-theme="dark"] {
  --bg: #0b2f2f;
  --bg-soft: #0f3b3b;
  --text: #e7f4f3;
  --muted: #a9c4c3;
  --card: #0e3131;
  --border: #134545;
  --shadow: 0 10px 30px rgba(0,0,0,.35);

  --btn-bg: #15a3a8;
  --btn-text: #0b2f2f;

  --hero-text: #eaffff;
  --link: #7ee2e7;
  --link-hover: #9df0f4;

  --modal-backdrop: rgba(0, 0, 0, .6);

  --footer-bg: #072626;
  --footer-text: #e7f4f3;
  --footer-muted: #a9c4c3;
  --footer-border: #113d3d;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  transition: background .25s ease, color .25s ease;
}
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); }
img { display: block; max-width: 100%; }
.container { width: min(1200px, 92%); margin-inline: auto; }

.navbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(10px);
  background: color-mix(in oklab, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: .8rem 0;
}
.logo { display: flex; gap: .6rem; align-items: center; font-weight: 800; letter-spacing: .2px; }
.logo-mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg,var(--accent-from),var(--accent-to));
  box-shadow: 0 6px 20px color-mix(in oklab, var(--accent-to) 25%, transparent);
}
.nav-menu { display: none; gap: 1.25rem; align-items: center; }
@media (min-width: 768px) {
  .nav-menu { display: flex; }
}
.nav-menu a { font-weight: 600; transition: color .2s ease; }
.nav-menu a.active {
  color: var(--accent-from);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}

.controls { display: flex; gap: .5rem; align-items: center; }

.btn, .chip {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: .55rem .8rem; border-radius: 10px; cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform .12s ease, background .25s ease, color .25s ease, border-color .25s ease;
  font-weight: 700;
  font-size: 14px;
}
.btn:hover { transform: translateY(-1px); }
.btn.primary {
  background: var(--btn-bg); color: var(--btn-text); border-color: transparent;
}
.toggle { display: inline-flex; align-items: center; gap: .5rem; padding: .45rem .7rem; }
.mobile-menu-btn { display: block; md:hidden; }

.hero {
  background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
  color: var(--hero-text);
  padding: 72px 0;
  text-align: center;
}
.hero-grid {
  display: grid; grid-template-columns: 1fr; gap: 2rem; align-items: center;
}
 @media (min-width: 900px) {
    .hero-grid { grid-template-columns: 1.1fr .9fr; text-align: left; }
}
.hero h1 { margin: 0 0 .5rem; font-size: clamp(28px, 5vw, 48px); line-height: 1.1; }
.hero p { font-size: clamp(14px, 2.2vw, 18px); opacity: .95; max-width: 600px; margin: 0 auto 1rem; }
 @media (min-width: 900px) {
    .hero p { margin: 0 0 1rem 0; }
}
.avatar {
  width: 160px; height: 160px; border-radius: 50%;
  border: 6px solid color-mix(in oklab, var(--accent-to) 30%, #ffffff);
  box-shadow: 0 14px 40px rgba(0,0,0,.25);
  object-fit: cover;
  object-position: center;
  margin: 0 auto;
}
.hero-cta { display:flex; gap:.8rem; margin-top: 1rem; flex-wrap: wrap; justify-content: center; }
 @media (min-width: 900px) {
    .hero-cta { justify-content: flex-start; }
}

.section { padding: 48px 0; }
.surface { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 16px; padding: 28px; box-shadow: var(--shadow); }
.about-grid { display: grid; gap: 2rem; align-items: center; grid-template-columns: 1fr; }
@media (min-width: 900px) {
    .about-grid { grid-template-columns: 1fr 1.2fr; }
}

.products-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); transition: transform .12s ease, box-shadow .25s ease, border-color .25s ease; cursor: pointer; position: relative; }
.card:hover { transform: translateY(-2px); box-shadow: 0 16px 38px rgba(0,0,0,.12); border-color: color-mix(in oklab, var(--accent-to) 25%, var(--border)); }
.card .thumb { width: 100%; aspect-ratio: 1/1; background: var(--bg-soft); display:flex; align-items:center; justify-content:center; font-weight:800; color: var(--muted); }
.card .content { padding: 12px 14px 16px; }
.price { font-weight: 800; }
.badge { position: absolute; top: 10px; left: 10px; background: var(--badge); color: var(--badge-text); padding: .28rem .5rem; border-radius: 999px; font-size: 12px; font-weight: 900; box-shadow: var(--shadow); }

/* Footer */
footer { background: var(--footer-bg); color: var(--footer-text); margin-top: 24px; padding-top: 24px; }
.footer-wrap { padding: 36px 0; display:grid; grid-template-columns: 1fr; gap: 36px; border-top: 1px solid var(--footer-border); }
@media (min-width: 560px) { .footer-wrap { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .footer-wrap { grid-template-columns: 1.2fr 1fr 1fr; } }
.footer-brand { display:flex; flex-direction:column; gap:.6rem; }
.footer-brand .logo-mark { box-shadow:none; }
.footer-tag { color: var(--footer-muted); }
.footer-col h4 { margin: 0 0 .8rem; font-size: 16px; }
.footer-links { display:flex; flex-direction:column; gap:.45rem; }
.footer-links a { color: var(--footer-text); opacity:.9; }
.footer-links a:hover { opacity:1; }
.footer-social-row { display:flex; gap:.6rem; align-items:center; }
.footer-social-row a { width:28px; height:28px; display:grid; place-items:center; border:1px solid var(--footer-border); border-radius:8px; color: var(--footer-text); opacity:.9; }
.footer-social-row a:hover { opacity:1; }
.footer-social-row img { width: 16px; height: 16px; }
.footer-bottom { border-top: 1px solid var(--footer-border); color: var(--footer-muted); font-size: 14px; padding: 14px 0; display:flex; justify-content:space-between; gap:1rem; flex-wrap:wrap; }
.footer-bottom a { color: var(--footer-text); opacity:.9; }
.footer-bottom a:hover { opacity:1; }

/* Modal overlay */
.modal-backdrop { 
  position: fixed; inset: 0; 
  display: none; place-items: center; 
  padding: 24px; background: var(--modal-backdrop); 
  z-index: 60;
}
.modal-backdrop.open { display: grid; }
.modal { 
  width: min(920px, 96vw); background: var(--card); 
  border: 1px solid var(--border); border-radius: 16px; 
  box-shadow: var(--shadow); padding: 18px;
}
.modal-head { display:flex; justify-content:space-between; align-items:center; margin-bottom:.6rem; }
.modal-body { display:grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 720px) { .modal-body { grid-template-columns: 1fr 1fr; } }

.section:last-of-type { padding-bottom: 28px; }