/* ==========================================================================
   HÔM NAY ĂN GÌ - DESIGN SYSTEM & GLOBAL STYLES
   Phong cách Hiện đại, Tươi mới, Tối ưu Trải nghiệm Mobile-First & Desktop
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Outfit:wght@500;600;700;800&display=swap');

:root {
  /* Màu sắc chủ đạo (Light Mode) */
  --color-primary: #10B981;
  --color-primary-hover: #059669;
  --color-primary-light: #ECFDF5;
  --color-primary-glow: rgba(16, 185, 129, 0.25);

  --color-accent: #F59E0B;
  --color-accent-hover: #D97706;
  --color-accent-light: #FEF3C7;

  --color-secondary: #3B82F6;
  --color-secondary-light: #EFF6FF;

  --color-bg-app: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F1F5F9;
  --color-surface-translucent: rgba(255, 255, 255, 0.85);

  --color-border: #E2E8F0;
  --color-border-subtle: #F1F5F9;

  --color-text-main: #0F172A;
  --color-text-muted: #64748B;
  --color-text-subtle: #94A3B8;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
  --shadow-glow: 0 0 20px var(--color-primary-glow);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', var(--font-main);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Dark Mode Palette */
[data-theme="dark"] {
  --color-bg-app: #0B0F19;
  --color-surface: #151D2F;
  --color-surface-hover: #1E293B;
  --color-surface-translucent: rgba(21, 29, 47, 0.88);

  --color-border: #243048;
  --color-border-subtle: #1C263B;

  --color-text-main: #F1F5F9;
  --color-text-muted: #94A3B8;
  --color-text-subtle: #64748B;

  --color-primary-light: rgba(16, 185, 129, 0.15);
  --color-accent-light: rgba(245, 158, 11, 0.15);
  --color-secondary-light: rgba(59, 130, 246, 0.15);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg-app);
  color: var(--color-text-main);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--color-surface-translucent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #10B981, #059669);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
}

.brand-text h1 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-main);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-top: 2px;
}

/* Navigation Tabs */
.header-nav {
  display: flex;
  align-items: center;
  background-color: var(--color-border-subtle);
  padding: 4px;
  border-radius: var(--radius-full);
  gap: 4px;
}

.nav-tab-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-tab-btn:hover {
  color: var(--color-text-main);
}

.nav-tab-btn.active {
  background-color: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
  font-size: 1.05rem;
}

.icon-btn:hover {
  color: var(--color-text-main);
  background-color: var(--color-surface-hover);
  border-color: var(--color-primary);
}

/* ==========================================================================
   MAIN CONTENT & LAYOUT
   ========================================================================== */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 5rem;
  width: 100%;
  flex: 1;
}

.tab-content-panel {
  display: none;
  animation: fadeIn 250ms ease-in-out;
}

.tab-content-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero Section */
.hero-banner {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, rgba(245, 158, 11, 0.06) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.75rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: center;
  overflow: hidden;
  position: relative;
}

.hero-text h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-text-main);
  line-height: 1.25;
  margin-bottom: 0.4rem;
}

.hero-text p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 650px;
}

.hero-image-wrap {
  width: 180px;
  height: 110px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.hero-image-wrap:hover img {
  transform: scale(1.05);
}

/* Two-column Grid Layout for Desktop */
.pantry-grid-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1.5rem;
  align-items: start;
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .pantry-grid-layout {
    grid-template-columns: 1fr;
  }

  .hero-banner {
    grid-template-columns: 1fr;
  }

  .hero-image-wrap {
    display: none;
  }
}

@media (max-width: 640px) {
  .header-nav {
    display: none; /* Dùng Mobile Bottom Nav */
  }

  .main-wrapper {
    padding-bottom: 6rem;
  }
}

/* ==========================================================================
   MOBILE BOTTOM NAVIGATION
   ========================================================================== */
.mobile-bottom-nav {
  display: none;
}

@media (max-width: 640px) {
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 60;
    background-color: var(--color-surface-translucent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--color-border);
    padding: 0.5rem 0.75rem calc(0.5rem + env(safe-area-inset-bottom));
    justify-content: space-around;
  }

  .mobile-nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--color-text-muted);
    padding: 4px 12px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
  }

  .mobile-nav-btn span.icon {
    font-size: 1.25rem;
  }

  .mobile-nav-btn.active {
    color: var(--color-primary);
  }
}