:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-strong: #eef2f7;
  --text: #102a43;
  --muted: #475569;
  --primary: #16a34a;
  --success: #22c55e;
  --danger: #ef4444;
  --border: rgba(148, 163, 184, 0.24);
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  padding: 96px 24px 24px;
  font-family: 'Be Vietnam Pro', Inter, sans-serif;
  background-color: var(--bg);
  background-image: radial-gradient(circle at top left, rgba(22, 163, 74, 0.12), transparent 22%),
                    radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.1), transparent 28%);
  color: var(--text);
}

h1, h2, h3, h4, h5, h6,
.card h2,
.card h3,
.hero-card h2,
.feature-card h3,
.auth-dialog h3 {
  color: #0f172a;
}

p,
label,
.table th,
.table td,
.log-table th,
.log-table td,
.food-table th,
.food-table td,
.user-menu-heading,
.user-menu .menu-item {
  color: var(--text);
}

.muted,
small,
.card p
.feature-card p,
.app-header p,
.profile-summary,
.log-summary span {
  color: var(--muted);
}

.app-shell {
  max-width: 1180px;
  margin: 0 auto;
}

.page-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 18px 28px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  color: var(--text);
  z-index: 100;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 24px;
  flex: 1;
}

.topbar-nav {
  margin: 0 auto;
}

.brand-logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--text);
}

.brand-logo-img {
  height: 48px;
  width: auto;
  display: block;
}

.topbar-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.topbar-nav a {
  color: #334155;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease, transform 0.2s ease;
}

.topbar-nav a:hover {
  color: var(--primary);
  transform: translateY(-1px);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-actions .tabs {
  display: none;
}

.topbar-actions .btn.primary {
  background: var(--primary);
  color: #fff;
}

.topbar-actions .btn.secondary {
  background: rgba(15, 23, 42, 0.06);
  color: #334155;
  border: 1px solid rgba(148, 163, 184, 0.26);
}

.app-header {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding: 24px 28px;
  border-radius: 28px;
  background: #f8fafc;
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: var(--shadow);
}

.app-header h1 {
  margin: 0 0 6px;
  font-size: clamp(2rem, 2.6vw, 2.7rem);
  color: #34d399;
}

.app-logo {
  max-width: 280px;
  height: auto;
  margin-bottom: 12px;
  display: block;
}

.app-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.header-actions {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.search-card .header-actions {
  justify-content: space-between;
  margin-bottom: 22px;
}

.tabs {
  display: flex;
  gap: 8px;
}

.tab-button {
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: #f1f5f9;
  color: #475569;
  padding: 12px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease;
  font-weight: 600;
}

.tab-button.active {
  background: rgba(22, 163, 74, 0.12);
  color: #0f172a;
  box-shadow: inset 0 0 0 1px rgba(22, 163, 74, 0.25);
}

.tab-button.active,
#adminTab {
  color: #0f172a;
}

.tab-button:hover {
  transform: translateY(-1px);
  color: #0f172a;
}

main {
  display: block;
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.panel-grid {
  display: grid;
  grid-template-columns: 1.25fr 1.75fr;
  gap: 20px;
}

.log-card {
  grid-column: 1 / -1;
}

.admin-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.card h2 {
  margin-top: 0;
  margin-bottom: 18px;
  font-size: 1.2rem;
  color: #0f172a;
}

label {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

input[type="search"],
input[type="text"],
input[type="password"],
input[type="number"],
input[type="date"],
select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 18px;
  background: #f8fafc;
  margin-bottom: 18px;
  font-size: 1rem;
  color: var(--text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

input[type="search"]::placeholder,
input[type="text"]::placeholder,
input[type="password"]::placeholder,
input[type="number"]::placeholder,
input[type="date"]::placeholder {
  color: #94a3b8;
}

input[type="search"]:focus,
input[type="text"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
select:focus {
  outline: none;
  border-color: rgba(16, 185, 129, 0.35);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
}

.food-list,
.food-table-wrapper,
.log-table-wrapper {
  overflow-x: auto;
}


.food-item,
.food-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 24px;
  margin-bottom: 16px;
  background: #f8fafc;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.food-item:hover,
.food-row:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  border-color: rgba(16, 185, 129, 0.24);
}

.food-item h3,
.food-row h3 {
  margin: 0 0 6px;
  color: #0f172a;
  font-size: 1.05rem;
  line-height: 1.3;
}

.food-item p,
.food-row p {
  margin: 0;
  color: #475569;
  line-height: 1.6;
}

.food-item small,
.food-row small {
  color: #64748b;
  display: block;
  margin-top: 6px;
}

.btn {
  border: none;
  border-radius: 18px;
  padding: 12px 18px;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn.primary {
  background: var(--primary);
  color: #fff;
}

.btn.secondary {
  background: rgba(15, 23, 42, 0.05);
  color: #334155;
  border: 1px solid rgba(148, 163, 184, 0.24);
}

.btn.secondary:hover {
  background: rgba(15, 23, 42, 0.08);
}

.btn.success {
  background: var(--success);
  color: #fff;
}

.btn.danger {
  background: var(--danger);
  color: #fff;
}

.food-table,
.log-table {
  width: 100%;
  border-collapse: collapse;
}

.food-table th,
.food-table td,
.log-table th,
.log-table td {
  text-align: left;
  padding: 14px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.food-table th,
.log-table th {
  color: var(--muted);
  font-weight: 600;
}

.food-table td,
.log-table td {
  color: var(--text);
}

.food-table tbody tr,
.log-table tbody tr {
  color: var(--text);
}

.log-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.summary-card {
  background: #ffffff;
  border-radius: 24px;
  padding: 20px;
  text-align: center;
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.05);
}

.summary-card strong {
  display: block;
  font-size: 1.45rem;
  margin-bottom: 8px;
  color: #102a43;
}

.summary-card span {
  color: var(--muted);
  font-size: 0.92rem;
}

.form-row {
  margin-bottom: 18px;
}

.form-row.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.profile-summary,
.chart-card,
.progress-card {
  background: #ffffff;
  border-radius: 28px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  padding: 24px;
  margin-top: 20px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.05);
}

.chart-card h3 {
  margin: 0 0 16px;
  font-size: 1rem;
  color: #102a43;
}

.chart-card canvas {
  width: 100%;
  height: 220px;
  max-height: 260px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  color: var(--muted);
}

.progress-bar {
  width: 100%;
  height: 16px;
  background: rgba(148, 163, 184, 0.15);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--primary);
  border-radius: 999px;
  transition: width 0.35s ease, background 0.35s ease;
}

.log-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.log-actions > * {
  min-width: 0;
}

.date-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1 1 min(100%, 260px);
  min-width: 0;
}

.date-row input[type="date"] {
  max-width: 100%;
  min-width: 0;
}

.export-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  flex: 1 1 min(100%, 240px);
  min-width: 0;
}

.export-actions button {
  white-space: nowrap;
  flex: 1 1 auto;
  min-width: 120px;
}

.export-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.food-controls {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 10px;
  align-items: center;
  width: 100%;
}

.food-controls input,
.food-controls select {
  width: 100%;
}

.food-controls button {
  white-space: nowrap;
}

.profile-summary {
  font-size: 0.95rem;
  color: var(--muted);
}

.profile-summary strong {
  display: block;
  margin-bottom: 10px;
  color: #102a43;
}

.admin-card.full-width {
  grid-column: 1 / -1;
}

@media (max-width: 900px) {
  .panel-grid,
  .admin-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .log-actions {
    justify-content: center;
  }

  .date-row,
  .export-actions {
    justify-content: center;
  }
}

@media (max-width: 640px) {
  body {
    padding: 16px;
  }

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

  .header-actions {
    flex-direction: column;
    align-items: stretch;
  }
}

.hidden {
  display: none !important;
}

.header-user {
  position: relative;
  margin-left: 8px;
}

.avatar-button {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(16, 185, 129, 0.16);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.avatar-button:hover {
  transform: translateY(-1px);
  background: rgba(16, 185, 129, 0.24);
}

.avatar-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.user-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 12px);
  min-width: 220px;
  background: #ffffff;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 22px;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.1);
  padding: 16px 0;
  z-index: 30;
}

.user-menu-heading {
  padding: 12px 18px;
  color: #0f172a;
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
  margin-bottom: 8px;
}

.menu-item {
  width: 100%;
  background: transparent;
  border: none;
  text-align: left;
  padding: 12px 18px;
  color: #334155;
  font-size: 0.96rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

.menu-item:hover {
  background: rgba(15, 23, 42, 0.04);
}

.menu-item.danger {
  color: #f97316;
}

.auth-modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 20;
}

.auth-dialog {
  width: min(460px, 100%);
  background: var(--surface);
  border-radius: 24px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: var(--shadow);
  padding: 28px;
  text-align: center;
}

.auth-dialog h3 {
  margin: 0 0 10px;
  font-size: 1.4rem;
}

.auth-dialog p {
  margin: 0 0 18px;
  color: var(--muted);
}

.auth-dialog input {
  width: 100%;
  margin-bottom: 18px;
}

.landing-hero {
  max-width: 1180px;
  margin: 0 auto 32px;
  padding: 44px 36px;
  border-radius: 36px;
  background: var(--surface);
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.08);
}

.landing-hero__content {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.hero-eyebrow {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 0.85rem;
  font-weight: 700;
}

.landing-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2.6rem, 4vw, 4rem);
  line-height: 1.03;
  color: var(--text);
}

.landing-hero p {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.landing-hero__cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(220px, 1fr));
  gap: 18px;
  margin-top: 38px;
}

.hero-card {
  background: #f8fafc;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 28px;
  padding: 26px;
}

.hero-card span {
  display: block;
  color: #475569;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.hero-card h2 {
  margin: 0 0 10px;
  color: #102a43;
  font-size: 1.15rem;
}

.hero-card p {
  margin: 0;
  color: #64748b;
  line-height: 1.7;
}

.features-section {
  max-width: 1180px;
  margin: 0 auto 28px;
  padding: 0 2px;
}

.features-section h2 {
  margin-bottom: 24px;
  color: #102a43;
  font-size: clamp(1.9rem, 3vw, 2.4rem);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(240px, 1fr));
  gap: 20px;
}

.feature-card {
  background: #f8fafc;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 28px;
  padding: 24px;
}

.feature-card h3 {
  margin: 0 0 12px;
  color: #102a43;
}

.feature-card p {
  margin: 0;
  color: #64748b;
  line-height: 1.75;
}

@media (max-width: 900px) {
  .landing-hero__cards,
  .features-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .landing-hero {
    padding: 28px 20px;
  }

  .landing-hero h1 {
    font-size: 2.4rem;
  }
}

/* User Management Styles */
.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
  border-radius: 8px;
}

.btn-sm.primary {
  background: var(--primary);
  color: #fff;
}

.btn-sm.danger {
  background: var(--danger);
  color: #fff;
}

.btn-sm:hover {
  transform: translateY(-1px);
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 600;
}

.badge-user {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
}

.badge-admin {
  background: rgba(16, 185, 129, 0.2);
  color: #10b981;
}

.action-buttons {
  display: flex;
  gap: 8px;
  align-items: center;
}

.user-form {
  margin-bottom: 24px;
}