/* ==========================================================================
   Design System & Styling for "Thu Hiền - Cùng Mẹ Hiểu Con"
   Archetype: Soft Structuralism & Editorial Luxury (Health/Pediatric Nutrition)
   Palette: 70% Warm Cream (#FAF7F0), 20% Deep Green (#174C3B), 10% Peach (#F08A4B)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Alata&display=swap');

:root {
  --color-primary: #174C3B;
  --color-primary-light: #1F5A45;
  --color-primary-dark: #0F3529;
  --color-sage: #8FAF91;
  --color-sage-light: #A9C2A4;
  --color-mint-sub: #EEF5EA;
  --color-mint-border: #E0EBDC;
  --color-cream-bg: #FAF7F0;
  --color-cream-card: #FFFFFF;
  --color-cream-subtle: #F7F2E8;
  --color-peach: #F08A4B;
  --color-peach-hover: #E07837;
  --color-peach-light: #FDF1EA;
  --color-text-main: #174C3B;
  --color-text-muted: #5F6E66;
  --color-text-dim: #8B9992;
  
  --font-sans: 'Alata', system-ui, -apple-system, sans-serif;
  --font-serif: 'Alata', sans-serif;
  
  --ease-elastic: cubic-bezier(0.32, 0.72, 0, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Alata', system-ui, -apple-system, sans-serif;
  background-color: var(--color-cream-bg);
  color: var(--color-text-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Alata', system-ui, -apple-system, sans-serif;
  min-height: 100dvh;
  line-height: 1.65;
  background-color: var(--color-cream-bg);
  overflow-x: hidden;
}

button, input, select, textarea {
  font-family: 'Alata', system-ui, -apple-system, sans-serif;
}

/* Typography Overrides */
h1, h2, h3 {
  text-wrap: balance;
}

.font-serif {
  font-family: 'Alata', sans-serif !important;
}

.font-sans {
  font-family: 'Alata', sans-serif !important;
}

/* ==========================================================================
   Background Patterns & Textures
   ========================================================================== */

/* Overall Page Soft Textured Grid */
.site-pattern-bg {
  background-image: radial-gradient(rgba(23, 76, 59, 0.09) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* Rich Hero Ambient Pattern with Soft Depth */
.hero-ambient-pattern {
  position: absolute;
  inset: 0;
  pointer-events-none;
  z-index: 0;
  background-image: 
    radial-gradient(ellipse 65% 45% at 50% 25%, rgba(240, 138, 75, 0.14) 0%, transparent 70%),
    radial-gradient(circle at 12% 18%, rgba(143, 175, 145, 0.2) 0%, transparent 40%),
    radial-gradient(circle at 88% 35%, rgba(240, 138, 75, 0.15) 0%, transparent 45%),
    radial-gradient(rgba(23, 76, 59, 0.14) 1.3px, transparent 1.3px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 36px 36px;
  mask-image: radial-gradient(ellipse 95% 85% at 50% 38%, black 45%, transparent 95%);
  -webkit-mask-image: radial-gradient(ellipse 95% 85% at 50% 38%, black 45%, transparent 95%);
}

.bg-subtle-pattern {
  background-image: radial-gradient(var(--color-sage) 0.75px, transparent 0.75px);
  background-size: 28px 28px;
  opacity: 0.25;
}

/* Double-Bezel Nested Architecture */
.double-bezel {
  background-color: rgba(23, 76, 59, 0.04);
  border: 1px solid rgba(143, 175, 145, 0.35);
  border-radius: 2rem;
  padding: 0.5rem;
  transition: all 0.5s var(--ease-elastic);
}

.double-bezel:hover {
  background-color: rgba(23, 76, 59, 0.07);
  border-color: rgba(143, 175, 145, 0.55);
}

.double-bezel-inner {
  background-color: var(--color-cream-card);
  border-radius: calc(2rem - 0.5rem);
  padding: 2rem;
  box-shadow: 0 4px 20px -2px rgba(23, 76, 59, 0.04);
  height: 100%;
}

.double-bezel-mint {
  background-color: rgba(238, 245, 234, 0.7);
  border: 1px solid rgba(143, 175, 145, 0.4);
  border-radius: 2rem;
  padding: 0.5rem;
}

.double-bezel-mint .double-bezel-inner {
  background-color: var(--color-mint-sub);
}

/* Button-in-Button / Island Architecture */
.btn-pill-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--color-primary);
  color: #FFFFFF;
  padding: 0.85rem 1.6rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: all 0.4s var(--ease-elastic);
  cursor: pointer;
}

.btn-pill-primary:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -4px rgba(23, 76, 59, 0.25);
}

.btn-pill-primary:active {
  transform: scale(0.98);
}

.btn-pill-primary .btn-circle-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 9999px;
  background-color: rgba(255, 255, 255, 0.2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.4s var(--ease-elastic);
}

.btn-pill-primary:hover .btn-circle-icon {
  transform: translateX(3px) translateY(-1px);
  background-color: rgba(255, 255, 255, 0.3);
}

.btn-pill-peach {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--color-peach);
  color: #FFFFFF;
  padding: 0.85rem 1.6rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.4s var(--ease-elastic);
  cursor: pointer;
  border: none;
}

.btn-pill-peach:hover {
  background-color: var(--color-peach-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -4px rgba(240, 138, 75, 0.35);
}

.btn-pill-peach:active {
  transform: scale(0.98);
}

.btn-pill-peach .btn-circle-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 9999px;
  background-color: rgba(255, 255, 255, 0.25);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.4s var(--ease-elastic);
}

.btn-pill-peach:hover .btn-circle-icon {
  transform: translateX(3px);
}

.btn-pill-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background-color: transparent;
  color: var(--color-primary);
  padding: 0.85rem 1.5rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid rgba(23, 76, 59, 0.2);
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn-pill-ghost:hover {
  background-color: rgba(23, 76, 59, 0.05);
  border-color: var(--color-primary);
}

/* Floating Navigation Island */
.nav-island {
  position: sticky;
  top: 1.25rem;
  z-index: 50;
  margin-left: auto;
  margin-right: auto;
  max-width: 72rem;
  padding: 0 1rem;
}

.nav-island-inner {
  background: linear-gradient(135deg, #F08A4B 0%, #EA7A33 100%);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 9999px;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 12px 32px -8px rgba(240, 138, 75, 0.45), 0 4px 12px -2px rgba(23, 76, 59, 0.08);
}

/* Eyebrow Tag */
.eyebrow-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  border-radius: 9999px;
  background-color: var(--color-mint-sub);
  border: 1px solid var(--color-mint-border);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Highlight badge for peach accent */
.peach-highlight {
  color: var(--color-peach);
  font-weight: 700;
}

/* Micro animations */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease-elastic), transform 0.8s var(--ease-elastic);
}

.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Pulse animation for live consultant status */
@keyframes pulse-soft {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.15); opacity: 0.75; }
}

.pulse-indicator {
  animation: pulse-soft 2.5s infinite;
}

/* Modal lead magnet styles */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  background-color: rgba(23, 76, 59, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background-color: var(--color-cream-bg);
  border-radius: 2rem;
  max-width: 38rem;
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--color-sage-light);
  box-shadow: 0 25px 50px -12px rgba(23, 76, 59, 0.25);
  transform: scale(0.95);
  transition: transform 0.35s var(--ease-elastic);
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

/* Custom Checkbox Pill */
.checkbox-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border-radius: 9999px;
  background-color: var(--color-mint-sub);
  border: 1.5px solid transparent;
  color: var(--color-text-main);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: all 0.25s ease;
}

.checkbox-pill:hover {
  background-color: #E2ECD7;
}

.checkbox-pill input {
  display: none;
}

.checkbox-pill.checked {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

/* Scrollbar refinement */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-cream-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-sage);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* Floating Glassmorphism Pill */
.floating-glass-pill {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(143, 175, 145, 0.35);
  box-shadow: 0 14px 30px -4px rgba(23, 76, 59, 0.1);
  border-radius: 9999px;
  transition: all 0.35s var(--ease-elastic);
}

.floating-glass-pill:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px -4px rgba(23, 76, 59, 0.16);
  border-color: rgba(143, 175, 145, 0.6);
}

/* Interactive Accordion for FAQ */
.faq-details {
  border: 1px solid rgba(143, 175, 145, 0.3);
  border-radius: 1.25rem;
  background-color: #FFFFFF;
  transition: all 0.3s ease;
  overflow: hidden;
}

.faq-details[open] {
  border-color: var(--color-primary);
  box-shadow: 0 8px 24px -4px rgba(23, 76, 59, 0.08);
}

.faq-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  color: var(--color-primary);
  user-select: none;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-chevron {
  transition: transform 0.3s ease;
}

.faq-details[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 1.5rem 1.25rem 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.925rem;
  line-height: 1.65;
}

/* Mobile Sticky Action Bar */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 45;
  background: rgba(250, 247, 240, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid rgba(143, 175, 145, 0.3);
  padding: 0.65rem 1rem;
}