/* Modern CSS Reset and Variables */
:root {
  --primary: #16a085;
  --primary-dark: #138d75;
  --secondary: #3498db;
  --accent: #e74c3c;
  --success: #27ae60;
  --warning: #f39c12;
  --dark: #2c3e50;
  --light: #ecf0f1;
  --gray-50: #f8f9fa;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 1px 3px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  --transition: all 0.2s ease-in-out;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--gray-800);
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5rem;
  color: var(--dark);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: 1rem;
  color: var(--gray-700);
}

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

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  background: var(--white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--gray-200);
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
}

header h1 {
  margin: 0;
  font-size: var(--font-size-2xl);
  font-weight: 800;
}

header h1 a {
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

header h1 a::before {
  content: "🍽️";
  font-size: 1.5rem;
}

header nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

header nav a {
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
}

header nav a:hover {
  background: var(--gray-100);
  text-decoration: none;
}

.linklike {
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
  color: var(--primary);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
}

.linklike:hover {
  background: var(--gray-100);
}

/* Main Content */
main {
  padding: 3rem 0;
  min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 0 6rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  margin: -3rem -1.5rem 3rem;
  border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
}

.hero h2 {
  font-size: var(--font-size-4xl);
  margin-bottom: 1rem;
  color: var(--white);
  font-weight: 800;
}

.hero p {
  font-size: var(--font-size-lg);
  margin-bottom: 2.5rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  padding: 0.875rem 2rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--white);
  text-decoration: none;
}

.btn.secondary {
  background: var(--white);
  color: var(--primary);
  border: 2px solid var(--white);
}

.btn.secondary:hover {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}

.btn.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}

.btn.btn-delete {
  background: var(--accent);
  color: var(--white);
  border: 2px solid var(--accent);
  padding: 0.5rem 1rem;
  font-size: var(--font-size-sm);
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.btn.btn-delete:hover {
  background: #c0392b;
  border-color: #c0392b;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--white);
  text-decoration: none;
}

/* Cards */
.card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card h3 {
  color: var(--dark);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--gray-200);
}

.card p {
  margin-bottom: 1rem;
}

/* Forms */
form {
  max-width: 500px;
}

label {
  display: block;
  margin-bottom: 1.5rem;
  font-weight: 500;
  color: var(--gray-700);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--gray-300);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-base);
  background: var(--white);
  color: var(--gray-800);
  transition: var(--transition);
  margin-top: 0.5rem;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(22, 160, 133, 0.1);
}

/* Radio buttons and checkboxes */
input[type="radio"],
input[type="checkbox"] {
  width: auto;
  margin-right: 0.5rem;
  margin-top: 0;
}

label:has(input[type="radio"]),
label:has(input[type="checkbox"]) {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
  cursor: pointer;
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin: 1rem 0;
}

.table th,
.table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

.table th {
  background: var(--gray-100);
  font-weight: 600;
  color: var(--gray-800);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table tbody tr:hover {
  background: var(--gray-50);
}

/* Lists */
ul {
  list-style: none;
}

.meals li,
.card ul li {
  padding: 1rem;
  margin-bottom: 0.5rem;
  background: var(--gray-100);
  border-radius: var(--border-radius-sm);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}

.meals li:hover,
.card ul li:hover {
  background: var(--gray-200);
  transform: translateX(4px);
}

.card ul li a {
  display: block;
  color: var(--gray-800);
  text-decoration: none;
  font-weight: 500;
}

.card ul li a:hover {
  color: var(--primary);
  text-decoration: none;
}

/* Features Section */
.features {
  padding: 4rem 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.feature-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.feature-card h3 {
  color: var(--dark);
  margin-bottom: 1rem;
  font-size: var(--font-size-xl);
}

.feature-card p {
  color: var(--gray-600);
  line-height: 1.6;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
  padding: 4rem 2rem;
  margin: 4rem -1.5rem 0;
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.cta-content h3 {
  font-size: var(--font-size-3xl);
  color: var(--dark);
  margin-bottom: 1rem;
}

.cta-content p {
  font-size: var(--font-size-lg);
  color: var(--gray-700);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Auth Forms */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 70vh;
  padding: 2rem 0;
}

.auth-card {
  background: var(--white);
  padding: 3rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
  width: 100%;
  max-width: 450px;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-header h2 {
  color: var(--dark);
  margin-bottom: 0.5rem;
  font-size: var(--font-size-3xl);
}

.auth-header p {
  color: var(--gray-600);
  font-size: var(--font-size-base);
  margin-bottom: 0;
}

/* Error Message Styling */
.error-message {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--border-radius-sm);
  padding: 1rem;
  margin-bottom: 1.5rem;
  color: #dc2626;
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.error-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.auth-form {
  max-width: none;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--gray-700);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input {
  margin-top: 0;
}

.btn-primary {
  width: 100%;
  background: var(--primary);
  font-size: var(--font-size-lg);
  font-weight: 600;
  padding: 1rem 2rem;
  margin-top: 1rem;
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.auth-footer {
  text-align: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--gray-200);
}

.auth-footer p {
  color: var(--gray-600);
  margin: 0;
}

.auth-footer a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.auth-footer a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  background: var(--gray-800);
  color: var(--gray-300);
  text-align: center;
  padding: 2rem 0;
  margin-top: 4rem;
}

footer p {
  margin: 0;
  color: var(--gray-400);
}

/* Utility Classes */
.small {
  font-size: var(--font-size-sm);
  color: var(--gray-600);
}

.text-center {
  text-align: center;
}

.text-muted {
  color: var(--gray-600);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* Details/Summary */
details {
  margin: 1rem 0;
  border: 1px solid var(--gray-300);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
}

details summary {
  cursor: pointer;
  font-weight: 600;
  padding: 1rem;
  background: var(--gray-100);
  border-bottom: 1px solid var(--gray-300);
  transition: var(--transition);
}

details summary:hover {
  background: var(--gray-200);
}

details[open] summary {
  background: var(--primary);
  color: var(--white);
}

details > *:not(summary) {
  padding: 1rem;
}

/* Dashboard Styles */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
  padding: 2rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--border-radius-lg);
  color: var(--white);
  margin-top: -1rem;
}

.welcome-section h2 {
  color: var(--white);
  font-size: var(--font-size-3xl);
  margin-bottom: 0.5rem;
}

.welcome-section p {
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
  font-size: var(--font-size-lg);
}

.quick-stats {
  display: flex;
  gap: 2rem;
}

.stat-item {
  text-align: center;
  background: rgba(255, 255, 255, 0.1);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  backdrop-filter: blur(10px);
}

.stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.8);
  margin-top: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.card-header {
  margin-bottom: 1.5rem;
}

.card-header h3 {
  border-bottom: none;
  margin-bottom: 0.5rem;
  padding-bottom: 0;
}

.card-header p {
  color: var(--gray-600);
  margin: 0;
  font-size: var(--font-size-sm);
}

.form-help {
  display: block;
  color: var(--gray-500);
  font-size: var(--font-size-xs);
  margin-top: 0.25rem;
}

.radio-group {
  margin-bottom: 2rem;
}

.radio-option {
  display: block;
  margin-bottom: 1rem;
  cursor: pointer;
  border: 2px solid var(--gray-300);
  border-radius: var(--border-radius);
  transition: var(--transition);
  overflow: hidden;
}

.radio-option:hover {
  border-color: var(--primary);
}

.radio-option input[type="radio"] {
  display: none;
}

.radio-option input[type="radio"]:checked + .radio-content {
  background: var(--primary);
  color: var(--white);
}

.radio-content {
  display: flex;
  align-items: center;
  padding: 1rem;
  gap: 1rem;
  transition: var(--transition);
  width: 100%;
}

.radio-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.radio-text {
  flex: 1;
}

.radio-text strong {
  display: block;
  font-size: var(--font-size-lg);
  margin-bottom: 0.25rem;
}

.radio-text span {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--gray-600);
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state h4 {
  color: var(--gray-700);
  margin-bottom: 0.5rem;
}

.empty-state p {
  color: var(--gray-600);
  margin: 0;
}

.plans-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.plan-item {
  display: flex;
  align-items: center;
  padding: 1.5rem;
  background: var(--gray-50);
  border-radius: var(--border-radius);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.plan-item:hover {
  background: var(--gray-100);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.plan-icon {
  font-size: 2rem;
  margin-right: 1rem;
  flex-shrink: 0;
}

.plan-content {
  flex: 1;
}

.plan-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.plan-title strong {
  color: var(--dark);
  font-size: var(--font-size-lg);
}

.plan-date {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  background: var(--gray-200);
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius-sm);
}

.plan-stats {
  display: flex;
  gap: 1rem;
  font-size: var(--font-size-sm);
  color: var(--gray-600);
}

.calories {
  color: var(--primary);
  font-weight: 600;
}

.plan-actions {
  flex-shrink: 0;
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.btn.btn-outline {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }

  header .container {
    padding: 1rem;
    flex-direction: column;
    gap: 1rem;
  }

  header nav {
    gap: 1rem;
  }

  .hero {
    padding: 3rem 1rem 4rem;
    margin: -3rem -1rem 2rem;
  }

  .hero h2 {
    font-size: var(--font-size-3xl);
  }

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

  .btn {
    width: 100%;
    max-width: 300px;
  }

  .card {
    padding: 1.5rem;
  }

  main {
    padding: 2rem 0;
  }

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

  .auth-container {
    padding: 1rem 0;
  }

  .auth-card {
    padding: 2rem;
  }

  /* Dashboard Mobile Styles */
  .dashboard-header {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
    padding: 2rem 1rem;
  }

  .quick-stats {
    flex-direction: row;
    justify-content: center;
    gap: 1rem;
  }

  .stat-item {
    padding: 1rem;
    min-width: 120px;
  }

  .dashboard-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .plan-item {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .plan-title {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .plan-stats {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero h2 {
    font-size: var(--font-size-2xl);
  }

  .card {
    padding: 1rem;
  }

  .table th,
  .table td {
    padding: 0.5rem;
    font-size: var(--font-size-sm);
  }

  .dashboard-header {
    padding: 1.5rem 1rem;
  }

  .quick-stats {
    flex-direction: column;
    gap: 1rem;
  }

  .stat-item {
    min-width: auto;
  }

  .radio-content {
    padding: 0.75rem;
    gap: 0.75rem;
  }

  .radio-icon {
    font-size: 1.5rem;
  }
}