/* Bearify - Coffee & Cream Theme */

/* ========================================
   CSS Variables - Bearify Design System
   ======================================== */
:root {
  /* Primary Brand Colors */
  --color-primary: #8B5C2A;        /* Coffee - Main buttons, CTA, Active state */
  --color-primary-dark: #3C160C;   /* Dark Brown - Headers, important titles */
  --color-secondary: #8D6E63;      /* Coco - Secondary text, icons */

  /* Accent Colors */
  --color-accent: #FFD04C;         /* Honey - Highlights, selected state */
  --color-accent-light: #FFF8E1;   /* Honey Light - Hover backgrounds */

  /* Background Colors */
  --color-bg-primary: #F6F2ED;     /* Cream - Main page background */
  --color-bg-secondary: #FAF7F3;   /* Light Cream - Secondary blocks */
  --color-bg-card: #FFFFFF;        /* White - Content cards */
  --color-bg-input: #EFE6DA;       /* Butter - Card/input backgrounds */

  /* Border */
  --color-border: #E0C9A6;         /* Beige - Borders, dividers */

  /* Text Colors */
  --color-text-primary: #3E2723;   /* Dark Brown - Primary text */
  --color-text-secondary: #8D6E63; /* Coco - Secondary text */
  --color-text-placeholder: #9E9E9E; /* Gray - Placeholder */

  /* Legacy color palette (for compatibility) */
  --color-50: #FFF8E1;
  --color-100: #FFF8E1;
  --color-200: #EFE6DA;
  --color-300: #E0C9A6;
  --color-400: #A67C52;
  --color-500: #8B5C2A;
  --color-600: #8B5C2A;
  --color-700: #3C160C;
  --color-800: #3E2723;
  --color-900: #3C160C;
  --color-950: #2D1108;

  /* Neutral colors */
  --white: #FFFFFF;
  --gray-50: #FAF7F3;
  --gray-100: #F6F2ED;
  --gray-200: #EFE6DA;
  --gray-300: #E0C9A6;
  --gray-400: #9E9E9E;
  --gray-500: #8D6E63;
  --gray-600: #6D5147;
  --gray-700: #5D4037;
  --gray-800: #3E2723;
  --gray-900: #3C160C;

  /* Semantic colors */
  --success: #4CAF50;
  --success-bg: #E8F5E9;
  --error: #EE6644;
  --error-bg: #FFEBEE;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans TC', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
}

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

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

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-700);
}

img {
  max-width: 100%;
  height: auto;
}

/* ========================================
   Layout
   ======================================== */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: 800px;
}

.container--wide {
  max-width: 1400px;
}

main {
  flex: 1;
}

/* ========================================
   Header
   ======================================== */
.header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: var(--space-lg) 0;
  position: relative;
  width: 100%;
  overflow: hidden;
}

.header--hero {
  background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-bg-input) 50%, var(--color-bg-primary) 100%);
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  animation: fadeIn 0.5s ease;
}

.header__content {
  display: block;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  width: 100%;
  text-align: center;
}

.header__logo {
  width: 80px;
  height: auto;
  display: block;
  margin: 0 auto var(--space-md);
}

.header--hero .header__logo {
  width: 100px;
}

.header__title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
  padding: 0;
  animation: fadeInDown 0.6s ease;
}

.header--hero .header__title {
  font-size: 2.5rem;
  color: var(--color-primary-dark);
}

.header__subtitle {
  font-size: 1.1rem;
  color: var(--gray-500);
  margin-top: var(--space-md);
  margin-bottom: 0;
  animation: fadeInUp 0.6s ease 0.1s both;
}

.header--hero .header__subtitle {
  color: var(--color-text-secondary);
}

/* ========================================
   Navigation Bar
   ======================================== */
.navbar {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: var(--space-sm) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--gray-900);
}

.navbar__brand:hover {
  color: var(--color-600);
}

.navbar__brand img {
  width: 32px;
  height: 32px;
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar__link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--gray-600);
  font-size: 0.9rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.navbar__link:hover {
  background: var(--gray-100);
  color: var(--gray-900);
  transform: translateY(-1px);
}

.navbar__link.active {
  background: var(--color-100);
  color: var(--color-700);
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Mobile menu toggle */
.navbar__toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-sm);
  cursor: pointer;
  color: var(--gray-700);
}

.navbar__toggle svg {
  width: 24px;
  height: 24px;
}

/* Nav actions (absolute positioned) */
.nav-actions {
  position: absolute;
  top: var(--space-md);
  right: var(--space-lg);
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.back-link {
  position: absolute;
  top: var(--space-md);
  left: var(--space-lg);
}

/* Mobile responsive */
@media (max-width: 768px) {
  .navbar__menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-xs);
  }

  .navbar__menu.open {
    display: flex;
  }

  .navbar__toggle {
    display: block;
  }

  .navbar__link {
    width: 100%;
    text-align: center;
  }
}

/* ========================================
   Language Selector
   ======================================== */
.lang-select {
  background: var(--white);
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-full);
  padding: var(--space-xs) var(--space-md);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  appearance: none;
  outline: none;
}

.lang-select:hover,
.lang-select:focus {
  border-color: var(--color-400);
  box-shadow: 0 0 0 3px var(--color-100);
}

.header--hero .lang-select {
  background: var(--white);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.header--hero .lang-select:hover,
.header--hero .lang-select:focus {
  background: var(--color-accent-light);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 42, 0.1);
}

/* Language Switcher (Button Style) */
.lang-switcher {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1000;
  display: flex;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.95);
  padding: 0.5rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 20px rgba(60, 22, 12, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
}

.lang-btn {
  padding: 0.4rem 0.8rem;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  background: var(--color-accent-light);
  color: var(--color-primary);
}

.lang-btn.active {
  background: linear-gradient(135deg, var(--color-primary), #A67C52);
  color: var(--white);
}

@media (max-width: 768px) {
  .lang-switcher {
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.35rem;
    gap: 0.25rem;
  }

  .lang-btn {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
  }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), #A67C52);
  color: var(--white);
}

.btn--primary:hover {
  background: linear-gradient(135deg, #A67C52, var(--color-primary));
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(139, 92, 42, 0.3);
}

.btn--secondary {
  background: var(--white);
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
}

.btn--secondary:hover {
  background: var(--gray-50);
  border-color: var(--gray-300);
}

.btn--ghost {
  background: transparent;
  color: var(--gray-600);
}

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

.btn--lg {
  padding: var(--space-md) var(--space-xl);
  font-size: 1.1rem;
}

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

/* ========================================
   Cards
   ======================================== */
.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-normal);
  animation: fadeInUp 0.5s ease both;
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 10px 20px rgba(139, 92, 42, 0.1);
  transform: translateY(-4px);
}

.card__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-sm);
}

.card__text {
  color: var(--gray-600);
  font-size: 0.95rem;
}

/* Feature cards grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-2xl) 0;
}

.feature-card {
  text-align: center;
  padding: var(--space-xl);
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }

.feature-card__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.feature-card__title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

/* ========================================
   Content Sections
   ======================================== */
.section {
  padding: var(--space-2xl) 0;
}

.section--alt {
  background: var(--gray-50);
}

.content-box {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin: var(--space-xl) 0;
  animation: scaleIn 0.4s ease;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  color: var(--gray-900);
  font-weight: 600;
  line-height: 1.3;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

.section-title {
  color: var(--color-primary);
  font-size: 1.25rem;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-border);
}

.section-title:first-of-type {
  margin-top: 0;
}

p {
  margin-bottom: var(--space-md);
  color: var(--gray-600);
}

ul, ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

li {
  margin-bottom: var(--space-sm);
  color: var(--gray-600);
}

strong {
  color: var(--gray-800);
  font-weight: 600;
}

/* ========================================
   Forms
   ======================================== */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: var(--space-sm);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: 1rem;
  font-family: inherit;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 42, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* ========================================
   Alerts & Messages
   ======================================== */
.alert {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.alert--success {
  background: var(--success-bg);
  color: #166534;
}

.alert--error {
  background: var(--error-bg);
  color: #991B1B;
}

.alert--info {
  background: var(--color-accent-light);
  color: var(--color-primary-dark);
  border-left: 4px solid var(--color-accent);
}

/* ========================================
   Tables
   ======================================== */
.table {
  width: 100%;
  border-collapse: collapse;
}

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

.table th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-700);
  width: 200px;
}

.table td {
  color: var(--gray-600);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-input) 100%);
  color: var(--color-text-secondary);
  padding: var(--space-lg) 0;
  text-align: center;
  font-size: 0.875rem;
  margin-top: auto;
  border-top: 1px solid var(--color-border);
}

.footer__links {
  margin-bottom: var(--space-sm);
}

.footer__links a {
  color: var(--color-text-secondary);
  margin: 0 var(--space-md);
  transition: all var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-primary);
}

/* ========================================
   Code Examples
   ======================================== */
.code-block {
  background: var(--gray-900);
  color: var(--gray-100);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  overflow-x: auto;
  margin: var(--space-md) 0;
}

pre {
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* ========================================
   Progress Bar
   ======================================== */
.progress {
  width: 100%;
  height: 6px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__fill {
  height: 100%;
  background: var(--color-500);
  transition: width 0.3s ease;
}

/* ========================================
   Upload Section
   ======================================== */
.upload-zone {
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.upload-zone:hover,
.upload-zone.active {
  border-color: var(--color-400);
  background: var(--color-50);
}

.upload-zone__label {
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: var(--space-sm);
}

.upload-zone__preview {
  margin-top: var(--space-md);
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.upload-zone__preview img {
  max-width: 200px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* ========================================
   Status Indicators
   ======================================== */
.status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
}

.status--connected {
  background: var(--success-bg);
  color: #166534;
}

.status--disconnected {
  background: var(--error-bg);
  color: #991B1B;
}

/* ========================================
   Utilities
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.hidden { display: none; }

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }

  .header--hero {
    padding: var(--space-xl) var(--space-md);
  }

  .header__content {
    padding: 0 var(--space-sm);
  }

  .header__title {
    font-size: 1.5rem;
  }

  .header--hero .header__title {
    font-size: 1.75rem;
  }

  .header__subtitle {
    font-size: 1rem;
  }

  .nav-actions {
    top: var(--space-sm);
    right: var(--space-md);
  }

  .back-link {
    top: var(--space-sm);
    left: var(--space-md);
  }

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

  .table th,
  .table td {
    padding: var(--space-sm);
    font-size: 0.875rem;
  }

  .table th {
    width: 120px;
  }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
  .header--hero {
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
  }

  .nav-actions,
  .back-link,
  .btn {
    display: none;
  }

  .footer {
    background: var(--white);
    color: var(--color-text-secondary);
  }
}