:root {
  --bg: #f4f3ef;
  --surface: #ffffff;
  --surface2: #f9f8f5;
  --border: rgba(0,0,0,0.09);
  --border2: rgba(0,0,0,0.16);
  --text1: #1c1b18;
  --text2: #5a5955;
  --text3: #9a9892;
  --accent: #1D9E75;
  --accent-light: #E1F5EE;
  --accent-dark: #0a5c43;
  --danger: #D85A30;
  --warn: #EF9F27;
  --nav-h: 64px;
  --header-h: 52px;
  --font: system-ui, -apple-system, 'Segoe UI', sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #181816; --surface: #222220; --surface2: #1e1e1c;
    --border: rgba(255,255,255,0.08); --border2: rgba(255,255,255,0.14);
    --text1: #eeecea; --text2: #aaa9a4; --text3: #686762;
    --accent-light: #04342C; --accent-dark: #5DCAA5;
  }
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body, #root { height: 100%; }
body { font-family: var(--font); background: var(--bg); color: var(--text1); -webkit-text-size-adjust: 100%; }

.app-shell { display: flex; flex-direction: column; height: 100%; max-width: 600px; margin: 0 auto; }
.app-header {
  height: var(--header-h); display: flex; align-items: center; padding: 0 16px;
  background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.app-logo { font-size: 18px; font-weight: 700; color: var(--accent); letter-spacing: -0.02em; }
.app-main { flex: 1; overflow-y: auto; padding: 16px 16px calc(var(--nav-h) + 16px); }

.bottom-nav {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 600px;
  height: var(--nav-h); display: flex; align-items: stretch;
  background: var(--surface); border-top: 1px solid var(--border);
  z-index: 20;
}
.nav-item {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 3px; color: var(--text3);
  text-decoration: none; font-size: 10px; font-weight: 500;
  transition: color 0.15s; padding-bottom: env(safe-area-inset-bottom, 0);
}
.nav-item.active { color: var(--accent); }
.nav-item svg { flex-shrink: 0; }

/* Cards */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.card + .card { margin-top: 12px; }
.card-title { font-size: 13px; font-weight: 600; color: var(--text3); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 10px; }

/* Stats grid */
.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.stat-val { font-size: 26px; font-weight: 700; color: var(--text1); line-height: 1; }
.stat-label { font-size: 12px; color: var(--text3); margin-top: 3px; }
.stat-delta { font-size: 12px; font-weight: 600; margin-top: 4px; }
.delta-pos { color: var(--accent); }
.delta-neg { color: var(--danger); }

/* Form */
.form-section { margin-bottom: 20px; }
.form-section-title {
  font-size: 13px; font-weight: 600; color: var(--text3);
  text-transform: uppercase; letter-spacing: 0.05em;
  margin-bottom: 10px; padding-bottom: 6px; border-bottom: 1px solid var(--border);
}
.form-row { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-bottom: 1px solid var(--border); }
.form-row:last-child { border-bottom: none; }
.form-label { flex: 1; font-size: 14px; color: var(--text1); }
.form-sub { font-size: 11px; color: var(--text3); display: block; margin-top: 1px; }
.form-input {
  width: 90px; padding: 7px 10px; text-align: right;
  font-family: var(--font); font-size: 15px; font-weight: 500; color: var(--text1);
  background: var(--surface2); border: 1.5px solid var(--border2);
  border-radius: 8px; transition: border-color 0.15s;
}
.form-input:focus { outline: none; border-color: var(--accent); }
.form-unit { font-size: 12px; color: var(--text3); width: 24px; }
.form-select {
  font-family: var(--font); font-size: 13px; color: var(--text1);
  background: var(--surface2); border: 1.5px solid var(--border2);
  border-radius: 8px; padding: 7px 10px; width: 100%;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font); font-size: 14px; font-weight: 600;
  padding: 10px 18px; border-radius: 10px; border: none; cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: white; }
.btn-secondary { background: var(--surface2); border: 1px solid var(--border2); color: var(--text2); }
.btn-danger { background: #FCEBEB; color: var(--danger); }
.btn-full { width: 100%; justify-content: center; }
.btn:disabled { opacity: 0.5; pointer-events: none; }

/* Badge */
.badge { display: inline-block; font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 4px; }

/* AI content */
.ai-content { font-size: 14px; line-height: 1.7; color: var(--text2); white-space: pre-wrap; }
.ai-content strong { color: var(--text1); font-weight: 600; }

/* Photo grid */
.photo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.photo-thumb { aspect-ratio: 1; border-radius: 8px; object-fit: cover; width: 100%; cursor: pointer; }

/* Tabs */
.tabs { display: flex; gap: 4px; background: var(--surface2); border-radius: 10px; padding: 3px; margin-bottom: 16px; }
.tab { flex: 1; text-align: center; padding: 7px; border-radius: 8px; font-size: 13px; font-weight: 500; color: var(--text3); cursor: pointer; border: none; background: transparent; font-family: var(--font); }
.tab.active { background: var(--surface); color: var(--text1); box-shadow: 0 1px 3px rgba(0,0,0,0.1); }

/* Section */
.section-gap { margin-bottom: 16px; }
.page-title { font-size: 20px; font-weight: 700; margin-bottom: 16px; }
.muted { color: var(--text3); font-size: 13px; }
.empty-state { text-align: center; padding: 48px 16px; color: var(--text3); }
.empty-state h3 { font-size: 16px; color: var(--text2); margin-bottom: 6px; }
.spinner { width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.7s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes slideDown {
  from { transform: translate(-50%, -20px); opacity: 0; }
  to { transform: translate(-50%, 0); opacity: 1; }
}

/* Additional vars */
:root {
  --warn-bg: #FAEEDA;
  --warn-text: #7a4b08;
}
@media (prefers-color-scheme: dark) {
  :root {
    --warn-bg: #3a2103;
    --warn-text: #FAC775;
  }
}

/* 6-item nav - smaller labels */
.nav-item span { font-size: 11px; }

/* 7-item nav scrollable */
.bottom-nav { overflow-x: auto; }
.nav-item span { font-size: 11px; }
.nav-item { min-width: 60px; }

/* Header with profile avatar */
.app-header { display:flex; align-items:center; justify-content:space-between; }
.app-header a { display:flex; }