:root {
  --bg: #f6f1ea;
  --panel: #fffdfa;
  --text: #201814;
  --muted: #766b61;
  --border: #e8dccd;
  --accent: #88472c;
  --accent-dark: #62301d;
  --tab-bg: #efe3d4;
  --shadow: 0 14px 34px rgb(50 31 18 / 8%);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.45;
}

a {
  color: var(--accent);
  text-decoration: none;
}

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  cursor: pointer;
  font-weight: 700;
  padding: 0.75rem 1rem;
  transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

button:hover,
.button:hover {
  background: var(--accent-dark);
  box-shadow: 0 8px 18px rgb(98 48 29 / 18%);
}

.button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--accent);
}

.app-header {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 22px rgb(50 31 18 / 5%);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-main {
  align-items: center;
  display: flex;
  justify-content: space-between;
  padding: 0.85rem 1rem 0.5rem;
}

.brand {
  color: var(--text);
  font-size: 1rem;
  font-weight: 800;
  white-space: nowrap;
}

.tab-nav {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding: 0 1rem 0.85rem;
  scrollbar-width: thin;
  white-space: nowrap;
}

.tab-group {
  display: flex;
  flex: 0 0 auto;
  gap: 0.4rem;
}

.tab-link {
  background: var(--tab-bg);
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text);
  flex: 0 0 auto;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 0.55rem 0.75rem;
  transition: background 0.18s ease, color 0.18s ease;
}

.tab-trigger {
  color: var(--text);
}

.tab-link.active,
.active-group > .tab-trigger {
  background: var(--accent);
  color: white;
}

.sub-tabs {
  display: flex;
  gap: 0.35rem;
}

.sub-tab-link {
  align-items: center;
  background: #fff8ef;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  display: inline-flex;
  flex: 0 0 auto;
  font-size: 0.82rem;
  font-weight: 700;
  min-height: 2rem;
  padding: 0.45rem 0.65rem;
}

.sub-tab-link.active {
  border-color: var(--accent);
  color: var(--accent);
}

.logout-form {
  margin: 0;
}

.nav-button {
  background: transparent;
  color: var(--accent);
  font-size: 0.85rem;
  padding: 0.2rem 0;
}

.container {
  margin: 0 auto;
  max-width: 1280px;
  padding: 1.25rem 1rem 2rem;
}

.flash {
  background: #fff4d7;
  border: 1px solid #e2c46b;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  padding: 0.75rem 1rem;
}

.eyebrow {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin: 0 0 0.35rem;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(1.55rem, 6vw, 2.2rem);
  letter-spacing: -0.03em;
  margin: 0;
}

@media (min-width: 820px) {
  .header-main {
    padding: 1rem 1.5rem 0.6rem;
  }

  .brand {
    font-size: 1.1rem;
  }

  .tab-nav {
    gap: 0.55rem;
    overflow: visible;
    padding: 0 1.5rem 0.9rem;
  }

  .tab-group {
    display: block;
    position: relative;
  }

  .sub-tabs {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow);
    display: grid;
    gap: 0.35rem;
    left: 0;
    min-width: 220px;
    opacity: 0;
    padding: 0.5rem;
    pointer-events: none;
    position: absolute;
    top: calc(100% + 0.45rem);
    transform: translateY(-4px);
    transition: opacity 0.16s ease, transform 0.16s ease;
    z-index: 40;
  }

  .tab-group:hover .sub-tabs,
  .tab-group:focus-within .sub-tabs {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .sub-tab-link {
    border-radius: 10px;
    justify-content: flex-start;
    min-height: 2.25rem;
    width: 100%;
  }

  .container {
    padding: 2rem 1.5rem;
  }
}