:root {
  /* Colorful, high-contrast palette inspired by Thai wellness & nature */
  --thai-ocean: #0a4d68;       /* Deep teal/navy */
  --pulse-coral: #ff5e62;      /* Vibrant healthy coral */
  --siam-gold: #ffbe0b;         /* Energetic warm gold */
  --jasmine-cream: #fbf9f1;    /* Light organic background */
  --charcoal-deep: #121820;    /* Dark elegant ground */
  --pure-canvas: #ffffff;      /* Clean contrast white */
  --leaf-emerald: #088178;     /* Prevention-safe green */
  
  /* Typography */
  --font-display: 'Kanit', 'Montserrat', sans-serif;
  --font-body: 'Sarabun', 'Poppins', sans-serif;
  
  /* Layout scales based on instructions */
  --band-spacing: 10dvh;       /* normal padding scale */
  --radius-soft: 18px;         /* soft border-radius-style */
  --shadow-raised: 0 10px 30px rgba(10, 77, 104, 0.08); /* raised shadow depth */
  
  /* Animation custom variables */
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--jasmine-cream);
  color: var(--charcoal-deep);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Scroll Progress Bar */
.siam-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--siam-gold), var(--pulse-coral));
  width: 100%;
  z-index: 10000;
  transform-origin: 0 50%;
  animation: siam-scroll-grow auto linear;
  animation-timeline: scroll(root);
}

@keyframes siam-scroll-grow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* Scroll-driven Entrance Animation */
@keyframes siam-fade-up {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.siam-animate-view {
  view-timeline-name: --siam-view-anim;
  view-timeline-axis: block;
  animation-timeline: --siam-view-anim;
  animation-name: siam-fade-up;
  animation-range: entry 10% cover 40%;
  animation-fill-mode: both;
}

/* Header layout (Preset L: first color band on accent-color) */
.siam-top-bar {
  background-color: var(--thai-ocean);
  color: var(--pure-canvas);
  padding: 1.5rem 2rem;
  position: relative;
  z-index: 999;
}

.siam-top-inner {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.siam-brand-wrap {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  color: var(--pure-canvas);
}

.siam-brand-logo {
  width: 42px;
  height: 42px;
  fill: var(--siam-gold);
}

.siam-brand-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.5px;
}

/* CSS-Only Hamburger Menu */
.siam-menu-checkbox {
  display: none;
}

.siam-menu-trigger {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.siam-menu-trigger span {
  display: block;
  width: 28px;
  height: 3px;
  background-color: var(--pure-canvas);
  border-radius: 2px;
  transition: var(--transition-smooth);
}

.siam-links-host {
  display: flex;
  gap: 2.2rem;
  align-items: center;
  list-style: none;
}

.siam-nav-anchor {
  color: var(--pure-canvas);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  transition: var(--transition-smooth);
  position: relative;
}

.siam-nav-anchor::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--siam-gold);
  transition: var(--transition-smooth);
}

.siam-nav-anchor:hover::after {
  width: 100%;
}

.siam-nav-anchor:hover {
  color: var(--siam-gold);
}

/* Responsive Navigation */
@media (max-width: 900px) {
  .siam-menu-trigger {
    display: flex;
  }

  .siam-links-host {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--thai-ocean);
    padding: 2rem;
    gap: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
  }

  .siam-menu-checkbox:checked ~ .siam-links-host {
    display: flex;
  }

  .siam-menu-checkbox:checked ~ .siam-menu-trigger span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }
  .siam-menu-checkbox:checked ~ .siam-menu-trigger span:nth-child(2) {
    opacity: 0;
  }
  .siam-menu-checkbox:checked ~ .siam-menu-trigger span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -7px);
  }
}

/* Preset L - Bold Color Bands general rule */
.siam-band-solid {
  padding: var(--band-spacing) 8vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.siam-band-accent {
  background: linear-gradient(135deg, var(--thai-ocean) 0%, #052c3e 100%);
  color: var(--pure-canvas);
}

.siam-band-coral {
  background: linear-gradient(135deg, var(--pulse-coral) 0%, #e04347 100%);
  color: var(--pure-canvas);
}

.siam-band-cream {
  background-color: var(--jasmine-cream);
  color: var(--charcoal-deep);
}

.siam-band-pure {
  background-color: var(--pure-canvas);
  color: var(--charcoal-deep);
}

.siam-band-dark {
  background-color: var(--charcoal-deep);
  color: var(--pure-canvas);
}

/* Typography styles */
.siam-main-h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6.5vw, 5.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.siam-sub-h1 {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  max-width: 750px;
  opacity: 0.95;
  margin-bottom: 2.5rem;
}

.siam-block-h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.25;
}

.siam-card-h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* Buttons */
.siam-action-pill {
  display: inline-block;
  padding: 1.1rem 2.5rem;
  border-radius: var(--radius-soft);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  text-align: center;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-raised);
  border: 2px solid transparent;
}

.siam-pill-gold {
  background-color: var(--siam-gold);
  color: var(--charcoal-deep);
}

.siam-pill-gold:hover {
  background-color: var(--pure-canvas);
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(255, 190, 11, 0.4);
}

.siam-pill-coral {
  background-color: var(--pulse-coral);
  color: var(--pure-canvas);
}

.siam-pill-coral:hover {
  background-color: var(--thai-ocean);
  transform: translateY(-4px);
}

.siam-pill-outline {
  border-color: var(--pure-canvas);
  color: var(--pure-canvas);
}

.siam-pill-outline:hover {
  background-color: var(--pure-canvas);
  color: var(--thai-ocean);
  transform: translateY(-4px);
}

/* Preset L: Hero Band (no bg.webp, min-height 80vh) */
.siam-hero-band {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.siam-hero-content {
  max-width: 1200px;
  width: 100%;
}

/* Preset L: Index bg.webp split image band */
.siam-split-image-band {
  height: 45vh;
  width: 100%;
  overflow: hidden;
}

.siam-split-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Preset L: Index content band with side graphic (bg2.webp) */
.siam-pull-quote-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
  max-width: 1300px;
  margin: 0 auto;
}

@media (max-width: 900px) {
  .siam-pull-quote-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

.siam-quote-frame {
  border-left: 6px solid var(--siam-gold);
  padding-left: 2rem;
}

.siam-quote-text {
  font-size: clamp(1.4rem, 2.5vw, 2.2rem);
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 1.5rem;
}

.siam-quote-author {
  font-size: 1.1rem;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.siam-quote-side-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-soft);
  box-shadow: var(--shadow-raised);
  object-fit: cover;
  max-height: 450px;
}

/* Preset L: Features (4 elements solid bands alternating) */
.siam-feature-band {
  display: flex;
  gap: 4rem;
  align-items: center;
  max-width: 100%;
  margin: 0 auto;
}

@media (max-width: 800px) {
  .siam-feature-band {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
}

.siam-feature-icon-box {
  flex-shrink: 0;
  width: 100px;
  height: 100px;
  border-radius: var(--radius-soft);
  background-color: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-raised);
}

.siam-feature-band:nth-child(even) .siam-feature-icon-box {
  background-color: rgba(10, 77, 104, 0.1);
}

.siam-feature-icon-box svg {
  width: 50px;
  height: 50px;
}

.siam-feature-text-block {
  max-width: 800px;
}

/* Preset L: How it works horizontal steps */
.siam-steps-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  max-width: 1300px;
  margin: 0 auto;
}

@media (max-width: 900px) {
  .siam-steps-row {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

.siam-step-pod {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3rem 2rem;
  border-radius: var(--radius-soft);
  position: relative;
  transition: var(--transition-smooth);
}

.siam-step-pod:hover {
  transform: translateY(-8px);
  background-color: rgba(255, 255, 255, 0.08);
}

.siam-step-number {
  font-family: var(--font-display);
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 1;
  color: var(--siam-gold);
  margin-bottom: 1.5rem;
}

/* Preset L: CTA Strip (maximum whitespace) */
.siam-cta-strip {
  padding: 12dvh 8vw;
  text-align: center;
}

.siam-cta-strip-inner {
  max-width: 800px;
  margin: 0 auto;
}

/* Stats Mini-Row bands for expert.html */
.siam-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  max-width: 1300px;
  margin: 0 auto;
  width: 100%;
}

@media (max-width: 900px) {
  .siam-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 550px) {
  .siam-stats-grid {
    grid-template-columns: 1fr;
  }
}

.siam-stat-segment {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-radius: var(--radius-soft);
  box-shadow: var(--shadow-raised);
}

.siam-stat-value {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 4vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

/* FAQ Accordion list for reserve.html (CSS Only) */
.siam-faq-house {
  max-width: 850px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.siam-faq-item {
  border-radius: var(--radius-soft);
  background-color: var(--pure-canvas);
  box-shadow: var(--shadow-raised);
  overflow: hidden;
}

.siam-faq-input {
  display: none;
}

.siam-faq-q {
  padding: 1.5rem 2rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  background-color: var(--pure-canvas);
  transition: var(--transition-smooth);
}

.siam-faq-q::after {
  content: '▼';
  font-size: 0.8rem;
  transition: var(--transition-smooth);
  color: var(--pulse-coral);
}

.siam-faq-input:checked ~ .siam-faq-q::after {
  transform: rotate(180deg);
}

.siam-faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  padding: 0 2rem;
  opacity: 0;
}

.siam-faq-input:checked ~ .siam-faq-a {
  max-height: 300px;
  padding: 0 2rem 2.2rem 2rem;
  opacity: 1;
}

/* Interactive Form on reserve.html */
.siam-interactive-form-outer {
  max-width: 560px;
  margin: 0 auto;
  background-color: var(--pure-canvas);
  padding: 4rem 3rem;
  border-radius: var(--radius-soft);
  box-shadow: var(--shadow-raised);
}

@media (max-width: 600px) {
  .siam-interactive-form-outer {
    padding: 2.5rem 1.5rem;
  }
}

.siam-form-field {
  margin-bottom: 1.8rem;
}

.siam-form-field label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
}

.siam-form-input, .siam-form-select, .siam-form-textarea {
  width: 100%;
  padding: 1rem 1.2rem;
  border: 2px solid rgba(10, 77, 104, 0.15);
  border-radius: var(--radius-soft);
  font-family: var(--font-body);
  font-size: 1rem;
  background-color: var(--jasmine-cream);
  transition: var(--transition-smooth);
}

.siam-form-input:focus, .siam-form-select:focus, .siam-form-textarea:focus {
  outline: none;
  border-color: var(--pulse-coral);
  background-color: var(--pure-canvas);
}

.siam-checkbox-slot {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.siam-checkbox-slot input {
  margin-top: 0.25rem;
  width: 18px;
  height: 18px;
  accent-color: var(--pulse-coral);
}

.siam-contact-card-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  max-width: 1200px;
  margin: 0 auto 5rem;
}

.siam-contact-card {
  background-color: var(--pure-canvas);
  padding: 3rem 2rem;
  border-radius: var(--radius-soft);
  box-shadow: var(--shadow-raised);
  text-align: center;
  transition: var(--transition-smooth);
}

.siam-contact-card:hover {
  transform: translateY(-5px);
}

.siam-contact-number-list {
  list-style: none;
  margin-top: 1.5rem;
  text-align: left;
}

.siam-contact-number-list li {
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.siam-color-bullet {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--pulse-coral);
  display: inline-block;
  flex-shrink: 0;
}

.siam-mail-link {
  color: var(--thai-ocean);
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.siam-mail-link:hover {
  color: var(--pulse-coral);
}

/* Footer layout */
.siam-bottom-anchor {
  background-color: var(--charcoal-deep);
  color: #adb5bd;
  padding: 6rem 8vw 3rem;
  border-top: 4px solid var(--pulse-coral);
}

.siam-bottom-grid {
  max-width: 1300px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

@media (max-width: 800px) {
  .siam-bottom-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

.siam-bottom-disclaimer {
  font-size: 0.85rem;
  line-height: 1.6;
  border-left: 3px solid rgba(255, 255, 255, 0.2);
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.siam-bottom-links-frame {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.siam-bottom-anchor-link {
  color: #adb5bd;
  text-decoration: none;
  transition: var(--transition-smooth);
  font-size: 0.95rem;
  width: fit-content;
}

.siam-bottom-anchor-link:hover {
  color: var(--pure-canvas);
  transform: translateX(5px);
}

.siam-bottom-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .siam-bottom-copyright {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
}

/* Cookie Banner styling */
.siam-cookie-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--thai-ocean);
  color: var(--pure-canvas);
  padding: 1.8rem 2.5rem;
  z-index: 99999;
  box-shadow: 0 -10px 40px rgba(0,0,0,0.3);
  display: none;
}

.siam-cookie-panel {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

@media (max-width: 800px) {
  .siam-cookie-panel {
    flex-direction: column;
    text-align: center;
  }
}

.siam-cookie-words {
  font-size: 0.95rem;
  line-height: 1.5;
}

.siam-cookie-actions {
  display: flex;
  gap: 1rem;
  flex-shrink: 0;
}

.siam-cookie-btn {
  padding: 0.75rem 1.8rem;
  border-radius: var(--radius-soft);
  border: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.siam-cookie-btn-accept {
  background-color: var(--siam-gold);
  color: var(--charcoal-deep);
}

.siam-cookie-btn-accept:hover {
  background-color: var(--pure-canvas);
}

.siam-cookie-btn-decline {
  background-color: transparent;
  color: var(--pure-canvas);
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.siam-cookie-btn-decline:hover {
  border-color: var(--pure-canvas);
  background-color: rgba(255, 255, 255, 0.1);
}