:root {
  --cream: #fdf6ed;
  --warm: #fff9f2;
  --ink: #1f1f1f;
  --muted: #6a665f;
  --amber: #e8a020;
  --terracotta: #c4622d;
  --green: #2d4a2d;
  --border: #f0d8b0;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'DM Sans', sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 10% 10%, #fff8ef, #f7eee0 45%, #fdf6ed);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 26px;
  border-bottom: 1px solid rgba(232, 160, 32, 0.2);
  background: rgba(253, 246, 237, 0.94);
  backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
  font-family: 'Playfair Display', serif;
  font-size: 25px;
  font-weight: 900;
}

.brand span span { color: var(--amber); }
.logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--amber), var(--terracotta));
}

nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}
nav a.active, nav a:hover { color: var(--ink); }

.back-btn {
  text-decoration: none;
  color: #fff;
  background: linear-gradient(135deg, var(--amber), var(--terracotta));
  padding: 9px 14px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 13px;
}

.page {
  width: min(1200px, 94vw);
  margin: 30px auto 44px;
}

.hero h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(34px, 4.1vw, 56px);
  margin: 4px 0 8px;
  letter-spacing: -0.4px;
}

.hero p { color: var(--muted); max-width: 760px; }
.eyebrow {
  margin: 0;
  color: #b06d17;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 700;
  font-size: 12px;
}

.layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 22px;
  margin-top: 24px;
}

.info-card,
.form-card {
  background: var(--warm);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 22px;
  box-shadow: 0 18px 40px rgba(88, 56, 14, 0.09);
}

.info-card h2 {
  margin: 0 0 10px;
  font-family: 'Playfair Display', serif;
  font-size: 38px;
}

.info-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  display: grid;
  gap: 8px;
}

.tips {
  margin-top: 16px;
  padding: 12px;
  border-radius: 12px;
  background: #fff4df;
}

.sell-form {
  display: grid;
  gap: 12px;
}

.preview-grid {
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 10px;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: #4f473c;
}

input, select, textarea {
  border: 1.4px solid #e8d6bc;
  border-radius: 10px;
  background: #fff;
  padding: 10px 11px;
  font: inherit;
}

input:focus, select:focus, textarea:focus {
  outline: 2px solid rgba(232, 160, 32, 0.2);
  border-color: #e0ac45;
}

.checks {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  color: var(--muted);
  font-size: 14px;
}

.checks label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.submit-btn {
  width: fit-content;
  border: none;
  border-radius: 999px;
  padding: 11px 22px;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--amber), var(--terracotta));
  cursor: pointer;
}

.sell-msg {
  min-height: 18px;
  margin: 4px 0 0;
  font-weight: 600;
  font-size: 14px;
}

.login-notice {
  margin-bottom: 14px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid #efc08f;
  background: #fff1df;
  color: #8a4e08;
  font-size: 14px;
}

.login-notice a { color: inherit; font-weight: 700; margin-left: 8px; }
.hidden { display: none; }

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .topbar {
    flex-wrap: wrap;
    align-items: flex-start;
  }

  nav {
    order: 3;
    width: 100%;
    gap: 12px 16px;
  }
}

@media (max-width: 760px) {
  .topbar {
    padding: 12px 16px;
  }

  .brand {
    font-size: 21px;
  }

  .logo {
    width: 36px;
    height: 36px;
  }

  .page {
    width: min(100%, calc(100vw - 24px));
    margin: 20px auto 32px;
  }

  .hero p {
    font-size: 15px;
  }

  .info-card,
  .form-card {
    padding: 18px 16px;
    border-radius: 18px;
  }

  .info-card h2 {
    font-size: 30px;
  }

  .row { grid-template-columns: 1fr; }

  .checks {
    flex-direction: column;
    gap: 10px;
  }

  .submit-btn {
    width: 100%;
    justify-self: stretch;
    text-align: center;
  }
}

@media (max-width: 560px) {
  .topbar {
    gap: 12px;
  }

  nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 12px;
  }

  .back-btn {
    width: 100%;
    text-align: center;
  }

  .hero h1 {
    font-size: clamp(30px, 10vw, 42px);
  }

  .preview-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}