/* ====================================
   CSS Variables & Design Tokens
   ==================================== */
:root {
  /* Colors - Rich Emerald Palette */
  --color-emerald-50: #ecfdf5;
  --color-emerald-100: #d1fae5;
  --color-emerald-200: #a7f3d0;
  --color-emerald-300: #6ee7b7;
  --color-emerald-400: #34d399;
  --color-emerald-500: #10b981;
  --color-emerald-600: #059669;
  --color-emerald-700: #047857;
  --color-emerald-800: #065f46;
  --color-emerald-900: #064e3b;
  
  /* Slate Palette */
  --color-slate-50: #f8fafc;
  --color-slate-100: #f1f5f9;
  --color-slate-200: #e2e8f0;
  --color-slate-300: #cbd5e1;
  --color-slate-400: #94a3b8;
  --color-slate-500: #64748b;
  --color-slate-600: #475569;
  --color-slate-700: #334155;
  --color-slate-800: #1e293b;
  --color-slate-900: #0f172a;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #059669 0%, #10b981 100%);
  --gradient-hero: linear-gradient(135deg, #064e3b 0%, #047857 50%, #059669 100%);
  --gradient-overlay: linear-gradient(180deg, rgba(6, 78, 59, 0.8) 0%, rgba(4, 120, 87, 0.6) 100%);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-3xl: 2rem;
  --radius-full: 9999px;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Playfair Display', serif;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* ====================================
   Reset & Base Styles
   ==================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-emerald-50);
  color: var(--color-slate-900);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ====================================
   Typography
   ==================================== */
.serif {
  font-family: var(--font-serif);
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
}

/* ====================================
   Layout Components
   ==================================== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.container-lg {
  max-width: 1536px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.container-sm {
  max-width: 768px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

/* ====================================
   Navigation Bar
   ==================================== */
.navbar {
  background: var(--color-emerald-800);
  color: white;
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 5rem;
  padding: 0 var(--spacing-6);
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  transition: transform var(--transition-base);
}

.navbar-logo:hover {
  transform: scale(1.02);
}

.navbar-logo-icon {
  background: white;
  padding: var(--spacing-2);
  border-radius: var(--radius-full);
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar-logo-icon svg {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-emerald-800);
}

.navbar-brand h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.navbar-brand p {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-emerald-200);
}

.navbar-menu {
  display: flex;
  gap: var(--spacing-8);
  align-items: center;
}

.navbar-link {
  transition: color var(--transition-fast);
  font-weight: 500;
}

.navbar-link:hover {
  color: var(--color-emerald-200);
}

.btn-admin {
  background: var(--color-emerald-600);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
}

.btn-admin:hover {
  background: var(--color-emerald-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ====================================
   Hero Section
   ==================================== */
.hero {
  background: var(--gradient-hero);
  color: white;
  padding: var(--spacing-20) var(--spacing-4);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.05"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 56rem;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: var(--spacing-6);
  line-height: 1.1;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-emerald-100);
  margin-bottom: var(--spacing-12);
  font-weight: 300;
  line-height: 1.7;
}

/* ====================================
   Search Bar
   ==================================== */
.search-container {
  max-width: 48rem;
  margin: 0 auto;
  position: relative;
}

.search-input {
  width: 100%;
  padding: var(--spacing-4) var(--spacing-6);
  padding-right: 4rem;
  font-size: 1.125rem;
  border-radius: var(--radius-full);
  border: none;
  box-shadow: var(--shadow-2xl);
  outline: none;
  transition: all var(--transition-base);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
}

.search-input:focus {
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.3), var(--shadow-2xl);
  transform: translateY(-2px);
}

.search-icon {
  position: absolute;
  right: var(--spacing-4);
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-emerald-600);
  padding: var(--spacing-2);
  border-radius: var(--radius-full);
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.search-icon svg {
  width: 1.5rem;
  height: 1.5rem;
  color: white;
}

/* ====================================
   Cards & Grids
   ==================================== */
.section {
  padding: var(--spacing-16) var(--spacing-4);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--spacing-12);
  flex-wrap: wrap;
  gap: var(--spacing-4);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-slate-800);
}

.section-title::after {
  content: '';
  display: block;
  width: 5rem;
  height: 0.375rem;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  margin-top: var(--spacing-2);
}

.result-count {
  color: var(--color-slate-500);
  font-weight: 500;
}

.herb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-8);
}

/* ====================================
   Herb Card
   ==================================== */
.herb-card {
  background: white;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-emerald-100);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

.herb-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-8px);
  border-color: var(--color-emerald-300);
}

.herb-card-image {
  position: relative;
  height: 14rem;
  overflow: hidden;
}

.herb-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.herb-card:hover .herb-card-image img {
  transform: scale(1.1);
}

.herb-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 78, 59, 0) 0%, rgba(6, 78, 59, 0.8) 100%);
}

.herb-card-label {
  position: absolute;
  bottom: var(--spacing-4);
  left: var(--spacing-4);
  color: white;
}

.herb-card-label-small {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-emerald-100);
  margin-bottom: var(--spacing-1);
}

.herb-card-label h3 {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.3;
}

.herb-card-content {
  padding: var(--spacing-6);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.herb-card-scientific {
  color: var(--color-emerald-700);
  font-style: italic;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-3);
}

.herb-card-description {
  color: var(--color-slate-600);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-4);
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.herb-card-footer {
  display: flex;
  align-items: center;
  color: var(--color-emerald-600);
  font-weight: 600;
  font-size: 0.875rem;
  gap: var(--spacing-2);
}

.herb-card-footer svg {
  width: 1rem;
  height: 1rem;
  transition: transform var(--transition-base);
}

.herb-card:hover .herb-card-footer svg {
  transform: translateX(4px);
}

/* ====================================
   Detail Page
   ==================================== */
.detail-container {
  padding: var(--spacing-12) var(--spacing-4);
}

.detail-card {
  background: white;
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-emerald-100);
  overflow: hidden;
}

.detail-layout {
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .detail-layout {
    grid-template-columns: 1fr 1fr;
  }
}

.detail-image {
  height: 28rem;
}

.detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-content {
  padding: var(--spacing-12);
}

.detail-header {
  margin-bottom: var(--spacing-6);
}

.detail-label {
  color: var(--color-emerald-600);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.875rem;
  margin-bottom: var(--spacing-2);
}

.detail-title {
  font-size: 2.5rem;
  color: var(--color-slate-800);
  margin-bottom: var(--spacing-2);
  line-height: 1.2;
}

.detail-scientific {
  color: var(--color-emerald-700);
  font-style: italic;
  font-size: 1.25rem;
  font-weight: 500;
}

.detail-sections {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
}

.detail-section h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-slate-800);
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-3);
}

.detail-section-number {
  width: 2rem;
  height: 2rem;
  background: var(--color-emerald-100);
  color: var(--color-emerald-700);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--spacing-3);
  font-size: 0.875rem;
}

.detail-section p {
  color: var(--color-slate-600);
  line-height: 1.7;
  padding-left: 2.75rem;
}

/* ====================================
   Buttons
   ==================================== */
.btn {
  padding: var(--spacing-4) var(--spacing-6);
  border-radius: var(--radius-xl);
  font-weight: 700;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  box-shadow: var(--shadow-lg);
}

.btn-primary {
  background: var(--color-emerald-600);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-emerald-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--color-slate-100);
  color: var(--color-slate-700);
}

.btn-secondary:hover {
  background: var(--color-slate-200);
}

.btn-full {
  width: 100%;
}

/* ====================================
   AI Insight Section
   ==================================== */
.ai-section {
  margin-top: var(--spacing-12);
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-emerald-50);
}

.ai-insight-box {
  margin-top: var(--spacing-6);
  padding: var(--spacing-6);
  background: var(--color-emerald-50);
  border: 1px solid var(--color-emerald-100);
  border-radius: var(--radius-2xl);
  animation: fadeIn 0.5s ease-in-out;
}

.ai-insight-title {
  font-weight: 700;
  color: var(--color-emerald-800);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-2);
}

.ai-insight-text {
  color: var(--color-slate-700);
  font-size: 0.875rem;
  line-height: 1.7;
  white-space: pre-line;
}

/* ====================================
   Admin Page
   ==================================== */
.admin-login {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
}

.login-card {
  max-width: 28rem;
  width: 100%;
  background: white;
  padding: var(--spacing-12);
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-2xl);
  border: 1px solid var(--color-emerald-100);
}

.login-header {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.login-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-slate-800);
  margin-bottom: var(--spacing-2);
}

.login-header p {
  color: var(--color-slate-500);
}

.form-group {
  margin-bottom: var(--spacing-6);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-slate-700);
  margin-bottom: var(--spacing-2);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  font-size: 1rem;
  transition: all var(--transition-base);
  font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-emerald-500);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 5rem;
}

/* ====================================
   Table
   ==================================== */
.table-container {
  background: white;
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-emerald-100);
  overflow: hidden;
}

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

.table thead {
  background: var(--color-emerald-50);
}

.table th {
  padding: var(--spacing-4) var(--spacing-6);
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-emerald-800);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.table td {
  padding: var(--spacing-4) var(--spacing-6);
  border-top: 1px solid var(--color-emerald-50);
}

.table tbody tr {
  transition: background var(--transition-fast);
}

.table tbody tr:hover {
  background: rgba(236, 253, 245, 0.3);
}

.table-thumbnail {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.table-actions {
  display: flex;
  gap: var(--spacing-4);
  justify-content: flex-end;
}

.btn-text {
  font-weight: 700;
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.btn-text-edit {
  color: var(--color-emerald-600);
}

.btn-text-edit:hover {
  background: var(--color-emerald-50);
}

.btn-text-delete {
  color: #ef4444;
}

.btn-text-delete:hover {
  background: #fee2e2;
}

/* ====================================
   Modal
   ==================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
  animation: fadeIn 0.2s ease-out;
}

.modal {
  background: white;
  width: 100%;
  max-width: 42rem;
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-2xl);
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease-out;
}

.modal-content {
  padding: var(--spacing-8);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-6);
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-slate-800);
}

.modal-close {
  color: var(--color-slate-400);
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-slate-600);
  background: var(--color-slate-100);
}

.modal-close svg {
  width: 1.5rem;
  height: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
}

@media (min-width: 768px) {
  .form-row-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.form-actions {
  display: flex;
  gap: var(--spacing-4);
  padding-top: var(--spacing-4);
}

/* ====================================
   Footer
   ==================================== */
.footer {
  background: var(--color-emerald-900);
  color: var(--color-emerald-100);
  padding: var(--spacing-12) var(--spacing-4);
  text-align: center;
}

.footer-brand {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-4);
}

.footer-tagline {
  color: var(--color-emerald-400);
  margin-bottom: var(--spacing-8);
  max-width: 28rem;
  margin-left: auto;
  margin-right: auto;
}

.footer-divider {
  border-top: 1px solid var(--color-emerald-800);
  padding-top: var(--spacing-8);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-emerald-500);
}

@media (min-width: 768px) {
  .footer-divider {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-links {
  display: flex;
  gap: var(--spacing-6);
}

.footer-link {
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: white;
}

/* ====================================
   Empty State
   ==================================== */
.empty-state {
  text-align: center;
  padding: var(--spacing-20) var(--spacing-4);
  background: white;
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-emerald-100);
}

.empty-state-icon {
  display: inline-flex;
  padding: var(--spacing-4);
  background: var(--color-emerald-50);
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-4);
}

.empty-state-icon svg {
  width: 3rem;
  height: 3rem;
  color: var(--color-emerald-200);
}

.empty-state h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-slate-800);
  margin-bottom: var(--spacing-2);
}

.empty-state p {
  color: var(--color-slate-500);
}

/* ====================================
   About Page
   ==================================== */
.about-container {
  max-width: 56rem;
  margin: 0 auto;
  padding: var(--spacing-20) var(--spacing-4);
  text-align: center;
}

.about-title {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-slate-800);
  margin-bottom: var(--spacing-12);
}

.about-content {
  color: var(--color-slate-600);
  font-size: 1.125rem;
  line-height: 1.8;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.about-image {
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-xl);
  margin: var(--spacing-12) 0;
}

/* ====================================
   Utilities
   ==================================== */
.hidden {
  display: none !important;
}

.loading-spinner {
  animation: spin 1s linear infinite;
  width: 1.25rem;
  height: 1.25rem;
}

/* ====================================
   Animations
   ==================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Mobile Menu (hidden for now, can be enhanced later) */
@media (max-width: 767px) {
  .navbar-menu {
    gap: var(--spacing-4);
  }
  
  .navbar-link {
    display: none;
  }
}