:root {
  /* Mint + deep teal palette */
  --bg: #dff9f6;
  --surface: #ecfffd;
  --card: #317870;
  --text: #0a2430;
  --muted: #1e4c55;
  --accent: #9de0d6;
  --accent-2: #b3f0e5;
  --line: rgba(0, 0, 0, 0.08);
  --shadow: 0 8px 18px rgba(0,0,0,0.15), 0 2px 6px rgba(0,0,0,0.1);
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background:
    radial-gradient(900px 600px at 15% -10%, rgba(157,224,214,0.25), transparent 60%),
    radial-gradient(800px 500px at 90% 10%, rgba(179,240,229,0.25), transparent 60%),
    var(--bg);
}

/* Page wrapper */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navigation */
.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  padding: 12px 0 16px;
  border-bottom: 1px solid var(--line);
}

.nav a {
  color: var(--text);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  background: transparent;
  border: 1px solid transparent;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .08s ease;
}
.nav a:hover, .nav a:focus-visible {
  background: var(--accent);
  color: var(--text);
  border-color: rgba(0, 0, 0, 0.1);
}
.nav a.active {
  color: var(--text);
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  border-color: transparent;
}

/* Hero banner */
.hero {
  text-align: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 56px 24px;
  margin: 24px 0 16px;
  box-shadow: var(--shadow);
  color: #e6fffa;
}
.hero h1 { margin: 0 0 8px; letter-spacing: 0.2px; color: #e6fffa; }
.hero p { color: #bde9e2; max-width: 760px; margin: 8px auto 0; }

/* Cards & grid */
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  box-shadow: var(--shadow);
  color: #e8fffb;
  transition: transform .15s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(0,0,0,0.2); }
.card h3 { margin-top: 0; color: #e6fffa; }
.card p { color: #b9e2dc; }

/* Buttons & forms */
button {
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  color: var(--text);
  border: none;
  padding: 10px 16px;
  border-radius: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .08s ease, filter .2s ease;
}
button:hover { filter: brightness(1.08); }
button:disabled { opacity: .6; cursor: not-allowed; }
button:active { transform: translateY(1px); }

label { display:block; margin: 12px 0 6px; color: var(--muted); }
input[type="text"], input[type="email"], textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid #ccc;
  background: #fff;
  color: var(--text);
  outline: none;
}
input:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(157,224,214,0.3);
}

/* ===== 3-up carousel (center focus) ===== */
.carousel.one { position: relative; margin: 20px 0 8px; padding: 8px 64px; }
.carousel.one .carousel-track {
  display: flex;
  gap: 16px;
  overflow: hidden;          /* hide extra slides */
  scroll-behavior: smooth;
  padding: 0 10%;            /* gentle side breathing room */
}
.carousel.one .slide {
  flex: 0 0 33.333%;
  opacity: .5;
  transition: transform .25s ease, opacity .25s ease, box-shadow .25s ease, background .25s ease;
  cursor: pointer;
}
.carousel.one .slide[aria-current="true"] {
  opacity: 1;
  transform: scale(1.01);
  box-shadow: 0 18px 36px rgba(0,0,0,.30);
}
.carousel .carousel-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 40px; height: 40px; border-radius: 999px; border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  color: var(--text); font-weight: 800; cursor: pointer; display: grid; place-items: center;
  box-shadow: var(--shadow);
}
.carousel .carousel-btn.prev { left: 12px; }
.carousel .carousel-btn.next { right: 12px; }
.carousel .carousel-btn[disabled] { opacity: .5; cursor: not-allowed; }

/* Portrait page layout (unchanged) */
.portrait-frame {
  max-width: 860px; margin: 16px auto; background: var(--card); border: 1px solid var(--line);
  border-radius: 18px; padding: 16px; box-shadow: var(--shadow);
}
.portrait-frame img { width: 100%; height: auto; border-radius: 12px; display: block; }
.portrait-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; }
.portrait-nav a, .portrait-nav button {
  text-decoration: none; background: linear-gradient(180deg, var(--accent), var(--accent-2));
  color: var(--text); border: 0; padding: 8px 12px; border-radius: 12px; font-weight: 700; cursor: pointer;
}

/* Footer */
.footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}