:root {
  --green: #27ae60;
  --green-dark: #219a52;
  --green-light: #eafaf1;
  --bg: #f4f6f9;
  --card: #ffffff;
  --border: #e0e6ed;
  --text: #1a202c;
  --muted: #718096;
  --red: #e53e3e;
  --red-light: #fff5f5;
  --blue: #3182ce;
  --yellow: #d69e2e;
  --yellow-light: #fffff0;
  --shadow: 0 2px 8px rgba(0,0,0,0.07);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

body.has-nav {
  padding-top: 60px;
}

/* ── NAV ── */
nav {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  width: 100%;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
  transition: transform 0.35s ease, opacity 0.35s ease;
}

nav.hidden {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}

.nav-brand {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--green);
  text-decoration: none;
  flex-shrink: 0;
  z-index: 1;
  letter-spacing: -0.3px;
}

.nav-links {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.2rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.4rem 0.9rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.2s;
}

.nav-links a:hover { color: var(--text); background: var(--bg); }
.nav-links a.active { color: var(--green); background: var(--green-light); font-weight: 600; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  z-index: 1;
}

.nav-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  user-select: none;
  border: 2px solid transparent;
  transition: border-color 0.2s;
}

.nav-avatar:hover { border-color: var(--green-dark); }

/* Profile dropdown */
.nav-profile { position: relative; }

.profile-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  min-width: 200px;
  z-index: 2000;
  overflow: hidden;
}

.profile-dropdown.open { display: block; }

.profile-dropdown-header {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.profile-dropdown-header .mini-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.profile-dropdown-header span {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.profile-dropdown button {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  font-size: 0.9rem;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: background 0.15s;
}

.profile-dropdown button:hover { background: var(--bg); }
.profile-dropdown button.logout-btn { color: var(--red); }

/* Profile edit modal */
.profile-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 3000;
  align-items: center;
  justify-content: center;
}

.profile-modal-overlay.open { display: flex; }

.profile-modal-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.8rem;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

.profile-modal-box h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  color: var(--text);
}

.profile-modal-actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 1.2rem;
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  padding: 6px;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  position: fixed;
  top: 60px; left: 0; right: 0;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 1rem 1rem;
  flex-direction: column;
  gap: 0.3rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  z-index: 999;
}

.mobile-menu.open { display: flex; }

.mobile-menu a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.2s;
}

.mobile-menu a:hover { background: var(--bg); color: var(--text); }
.mobile-menu a.active { background: var(--green-light); color: var(--green); }

.mobile-menu .mobile-logout {
  color: var(--red);
  margin-top: 0.4rem;
  border-top: 1px solid var(--border);
  padding-top: 0.9rem;
}

@media (max-width: 640px) {
  nav { padding: 0 1rem; }
  .nav-links { display: none; }
  .nav-right a { display: none; }
  .hamburger { display: flex; }
}

/* ── LAYOUT ── */
.container { max-width: 900px; margin: 0 auto; padding: 2rem 1rem; }

/* ── CARDS ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.card h2 { font-size: 1.05rem; font-weight: 700; margin-bottom: 1rem; color: var(--text); }

/* ── BUTTONS ── */
.btn {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s;
}

.btn-green { background: var(--green); color: #fff; }
.btn-green:hover { background: var(--green-dark); }
.btn-outline { background: transparent; border: 1.5px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--green); color: var(--green); }
.btn-red { background: var(--red); color: #fff; }
.btn-red:hover { opacity: 0.85; }
.btn-sm { padding: 0.3rem 0.7rem; font-size: 0.8rem; }

/* ── INPUTS ── */
input, select {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 0.6rem 0.9rem;
  font-size: 0.9rem;
  width: 100%;
  outline: none;
  transition: border 0.2s;
}

input:focus, select:focus { border-color: var(--green); background: #fff; }
input::placeholder { color: #b0bec5; }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.82rem; font-weight: 600; color: var(--muted); margin-bottom: 0.3rem; text-transform: uppercase; letter-spacing: 0.4px; }

.pw-wrap { position: relative; display: flex; align-items: center; }
.pw-wrap input { width: 100%; padding-right: 2.8rem; }
.pw-toggle { position: absolute; right: 0.6rem; background: none; border: none; cursor: pointer; font-size: 1.1rem; padding: 0.2rem 0.3rem; line-height: 1; color: var(--muted); transition: color 0.2s; }
.pw-toggle:hover { color: var(--text); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ── AUTH PAGE ── */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: linear-gradient(135deg, #eafaf1 0%, #f4f6f9 100%);
}

.auth-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.auth-logo { font-size: 2rem; margin-bottom: 0.3rem; }
.auth-box h1 { font-size: 1.6rem; color: var(--green); margin-bottom: 0.3rem; font-weight: 800; }
.auth-box p { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.8rem; }

.tabs { display: flex; gap: 0.4rem; margin-bottom: 1.5rem; background: var(--bg); padding: 4px; border-radius: 10px; }
.tab {
  flex: 1; padding: 0.5rem;
  border: none; border-radius: 8px;
  color: var(--muted); cursor: pointer; font-size: 0.9rem; font-weight: 500;
  background: transparent;
  text-align: center; transition: all 0.2s;
}
.tab.active { background: var(--card); color: var(--green); font-weight: 700; box-shadow: var(--shadow); }

.form-panel { display: none; }
.form-panel.active { display: block; }

/* ── FOOD SEARCH ── */
.search-bar { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; }
.search-bar input { flex: 1; }

.food-results { display: grid; gap: 0.8rem; }

.food-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.2s;
  box-shadow: var(--shadow);
}

.food-card:hover { border-color: var(--green); box-shadow: 0 4px 16px rgba(39,174,96,0.1); }

.food-info h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.3rem; color: var(--text); }
.food-info p { font-size: 0.8rem; color: var(--muted); }

.food-macros {
  display: flex; gap: 1rem;
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.4rem;
}

.food-macros span { display: flex; flex-direction: column; align-items: center; gap: 1px; }
.food-macros strong { font-size: 0.88rem; color: var(--text); font-weight: 700; }

.calories-badge {
  background: var(--green);
  color: #fff;
  border-radius: 8px;
  padding: 0.35rem 0.8rem;
  font-size: 0.9rem;
  font-weight: 700;
  white-space: nowrap;
}

.source-badge {
  font-size: 0.68rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.4rem;
  font-weight: 600;
}

.source-cache { background: var(--green-light); color: var(--green); }
.source-api   { background: #ebf8ff; color: var(--blue); }

/* ── Health filter buttons ── */
.filter-btn {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 0.25rem 0.75rem;
  font-size: 0.78rem;
  cursor: pointer;
  color: var(--muted);
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.filter-btn:hover  { border-color: var(--green); color: var(--green); }
.filter-btn.active { background: var(--green); border-color: var(--green); color: #fff; font-weight: 600; }

/* ── Health label tags on food cards ── */
.health-tags { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.health-tag  {
  font-size: 0.68rem;
  padding: 0.1rem 0.45rem;
  border-radius: 10px;
  background: var(--green-light);
  color: var(--green);
  font-weight: 500;
}

/* ── MEAL PLANNER ── */
.meal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.8rem;
}

.meal-header h3 { font-size: 1rem; font-weight: 700; display: flex; align-items: center; gap: 0.4rem; }
.meal-total { font-size: 0.85rem; color: var(--muted); font-weight: 600; }

.meal-items { display: grid; gap: 0.5rem; min-height: 40px; }

.meal-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.meal-item-name { flex: 1; font-weight: 500; }
.meal-item-cal { color: var(--green); font-weight: 700; margin: 0 1rem; }

.empty-slot {
  color: var(--muted);
  font-size: 0.8rem;
  padding: 0.6rem;
  text-align: center;
  border: 1.5px dashed var(--border);
  border-radius: 8px;
}

/* ── PROGRESS BAR ── */
.daily-summary {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.progress-wrap { flex: 1; margin: 0 1.5rem; }
.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

.progress-bar {
  height: 10px;
  background: var(--bg);
  border-radius: 5px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.progress-fill {
  height: 100%;
  background: var(--green);
  border-radius: 5px;
  transition: width 0.5s ease;
}

.progress-fill.over { background: var(--red); }

/* ── REPORTS ── */
.report-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.stat-card .value { font-size: 1.6rem; font-weight: 800; color: var(--green); }
.stat-card .label { font-size: 0.75rem; color: var(--muted); margin-top: 0.3rem; font-weight: 500; }

.report-message {
  padding: 0.85rem 1rem;
  border-radius: 10px;
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
  font-weight: 500;
}

.report-message.good { background: var(--green-light); border-left: 3px solid var(--green); color: var(--green-dark); }
.report-message.warn { background: var(--yellow-light); border-left: 3px solid var(--yellow); color: #7b6000; }
.report-message.bad  { background: var(--red-light); border-left: 3px solid var(--red); color: var(--red); }

/* ── DASHBOARD ── */
.dash-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.dash-stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.4rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.dash-stat .big { font-size: 2rem; font-weight: 800; color: var(--green); }
.dash-stat .sub { font-size: 0.8rem; color: var(--muted); margin-top: 0.3rem; font-weight: 500; }

/* ── ALERTS ── */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  display: none;
  font-weight: 500;
}
.alert.show { display: block; }
.alert-error { background: var(--red-light); color: var(--red); border: 1px solid #fed7d7; }
.alert-success { background: var(--green-light); color: var(--green-dark); border: 1px solid #9ae6b4; }

/* ── SPINNER ── */
.spinner {
  display: inline-block;
  width: 18px; height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── DATE BAR ── */
.date-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.date-bar input { width: auto; }

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
  .dash-grid { grid-template-columns: 1fr; }
  .container { padding: 1rem; }
}