/* MedSync Design System
   Corporate medical/logistics — navy + cyan, inspired by the logo's
   curved sweep suggesting motion and connection. */

:root {
  /* Brand — Navy heavy by default (overridable via Tweaks) */
  --ms-navy-900: #0a1f3d;
  --ms-navy-800: #102a52;
  --ms-navy-700: #1a3d7c;
  --ms-navy-600: #234a90;
  --ms-navy-500: #2e5fa8;
  --ms-cyan-600: #1d9cc0;
  --ms-cyan-500: #2cb5d9;
  --ms-cyan-400: #5fc8e3;
  --ms-cyan-300: #a8e0ee;
  --ms-cyan-50:  #eaf6fa;

  /* Neutrals */
  --ms-ink:      #0e1726;
  --ms-text:     #1a2434;
  --ms-muted:    #5a6b82;
  --ms-line:     #dde4ee;
  --ms-line-soft:#eef2f8;
  --ms-bg:       #ffffff;
  --ms-bg-soft:  #f5f8fc;
  --ms-bg-deep:  #eef3f9;

  /* Accents */
  --ms-success:  #2a9d6a;
  --ms-warn:     #c97a1d;

  /* Semantic */
  --ms-primary:  var(--ms-navy-700);
  --ms-accent:   var(--ms-cyan-500);
  --ms-on-primary: #ffffff;

  /* Typography */
  --ms-font-display: 'Outfit', 'IBM Plex Sans Thai', system-ui, sans-serif;
  --ms-font-body: 'Outfit', 'IBM Plex Sans Thai', system-ui, sans-serif;
  --ms-font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* Spacing scale */
  --ms-s1: 4px;
  --ms-s2: 8px;
  --ms-s3: 12px;
  --ms-s4: 16px;
  --ms-s5: 24px;
  --ms-s6: 32px;
  --ms-s7: 48px;
  --ms-s8: 64px;
  --ms-s9: 96px;
  --ms-s10: 128px;

  /* Radius */
  --ms-r-sm: 4px;
  --ms-r-md: 8px;
  --ms-r-lg: 14px;
  --ms-r-xl: 20px;

  /* Shadow */
  --ms-shadow-sm: 0 1px 2px rgba(10,31,61,0.06), 0 1px 3px rgba(10,31,61,0.04);
  --ms-shadow-md: 0 4px 12px rgba(10,31,61,0.08), 0 2px 4px rgba(10,31,61,0.04);
  --ms-shadow-lg: 0 16px 40px rgba(10,31,61,0.12), 0 4px 12px rgba(10,31,61,0.06);

  /* Container */
  --ms-container: 1240px;
}

/* Palette variants (overridden by Tweaks via [data-palette] on body) */
[data-palette="navy"] {
  --ms-primary: var(--ms-navy-700);
  --ms-accent: var(--ms-cyan-500);
}
[data-palette="cyan"] {
  --ms-primary: var(--ms-cyan-600);
  --ms-accent: var(--ms-navy-700);
}
[data-palette="light"] {
  --ms-primary: var(--ms-navy-700);
  --ms-accent: var(--ms-cyan-500);
  --ms-bg: #ffffff;
  --ms-bg-soft: #fafbfd;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--ms-font-body);
  color: var(--ms-text);
  background: var(--ms-bg);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
:lang(th), [lang="th"] { font-family: 'IBM Plex Sans Thai', var(--ms-font-body); }

/* Type scale */
.ms-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ms-cyan-600);
}
:lang(th).ms-eyebrow, [lang="th"] .ms-eyebrow {
  letter-spacing: 0.06em;
  text-transform: none;
}

h1, h2, h3, h4 { font-family: var(--ms-font-display); color: var(--ms-ink); margin: 0; line-height: 1.15; letter-spacing: -0.015em; }
h1 { font-size: clamp(40px, 5.2vw, 68px); font-weight: 600; }
h2 { font-size: clamp(30px, 3.4vw, 44px); font-weight: 600; }
h3 { font-size: clamp(20px, 1.6vw, 24px); font-weight: 600; letter-spacing: -0.01em; }
h4 { font-size: 17px; font-weight: 600; letter-spacing: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }

.ms-lead {
  font-size: clamp(17px, 1.3vw, 20px);
  color: var(--ms-muted);
  line-height: 1.55;
  max-width: 60ch;
}

/* Layout */
.ms-container {
  max-width: var(--ms-container);
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 720px) {
  .ms-container { padding: 0 20px; }
}

.ms-section {
  padding: clamp(64px, 8vw, 120px) 0;
}
.ms-section--tight { padding: clamp(40px, 5vw, 72px) 0; }

/* Buttons */
.ms-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .2s ease, box-shadow .2s ease, color .2s ease;
  font-family: inherit;
  white-space: nowrap;
}
.ms-btn--primary {
  background: var(--ms-primary);
  color: var(--ms-on-primary);
}
.ms-btn--primary:hover { background: var(--ms-navy-800); transform: translateY(-1px); box-shadow: var(--ms-shadow-md); }
.ms-btn--accent {
  background: var(--ms-accent);
  color: white;
}
.ms-btn--accent:hover { filter: brightness(0.95); transform: translateY(-1px); }
.ms-btn--ghost {
  background: transparent;
  color: var(--ms-ink);
  border-color: var(--ms-line);
}
.ms-btn--ghost:hover { border-color: var(--ms-primary); color: var(--ms-primary); }
.ms-btn--ghost-light {
  background: transparent;
  color: white;
  border-color: rgba(255,255,255,0.3);
}
.ms-btn--ghost-light:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.6); }

.ms-btn .ms-arrow {
  width: 14px; height: 14px;
  transition: transform .2s ease;
}
.ms-btn:hover .ms-arrow { transform: translateX(3px); }

/* Cards */
.ms-card {
  background: var(--ms-bg);
  border: 1px solid var(--ms-line);
  border-radius: var(--ms-r-lg);
  padding: 32px;
  transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.ms-card--interactive:hover {
  box-shadow: var(--ms-shadow-md);
  transform: translateY(-2px);
  border-color: var(--ms-cyan-300);
}

/* Header / Nav */
.ms-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--ms-line-soft);
}
.ms-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  max-width: var(--ms-container);
  margin: 0 auto;
  gap: 24px;
}
.ms-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ms-ink);
}
.ms-logo img { height: 38px; width: auto; display: block; }
.ms-nav {
  display: flex;
  gap: 4px;
  align-items: center;
}
.ms-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14.5px;
  color: var(--ms-text);
  font-weight: 450;
  transition: color .15s, background .15s;
}
.ms-nav a:hover { color: var(--ms-primary); background: var(--ms-bg-soft); }
.ms-nav a.is-active { color: var(--ms-primary); font-weight: 500; }
.ms-nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.ms-lang-toggle {
  display: inline-flex;
  border: 1px solid var(--ms-line);
  border-radius: 999px;
  padding: 3px;
  font-size: 12px;
  font-weight: 500;
}
.ms-lang-toggle button {
  border: 0;
  background: transparent;
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  color: var(--ms-muted);
  font-family: inherit;
  font-weight: 500;
}
.ms-lang-toggle button.is-active {
  background: var(--ms-primary);
  color: white;
}

/* Mobile menu */
.ms-mobile-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
@media (max-width: 920px) {
  .ms-nav { display: none; }
  .ms-mobile-toggle { display: block; }
  .ms-nav.is-open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: white;
    border-bottom: 1px solid var(--ms-line);
    padding: 12px;
    gap: 4px;
  }
  .ms-nav.is-open a { padding: 14px 16px; }
}

/* Footer */
.ms-footer {
  background: var(--ms-navy-900);
  color: rgba(255,255,255,0.75);
  padding: 80px 0 32px;
}
.ms-footer h4 { color: white; font-size: 14px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 16px; }
.ms-footer a { color: rgba(255,255,255,0.7); transition: color .15s; }
.ms-footer a:hover { color: var(--ms-cyan-400); }
.ms-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
@media (max-width: 800px) {
  .ms-footer__grid { grid-template-columns: 1fr 1fr; gap: 40px 32px; }
}
.ms-footer__bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 32px;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  flex-wrap: wrap;
  gap: 16px;
}
.ms-footer__nav { display: flex; flex-direction: column; gap: 10px; font-size: 14.5px; }

/* Tag / chip */
.ms-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--ms-cyan-50);
  color: var(--ms-navy-700);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  border: 1px solid var(--ms-cyan-300);
}
.ms-tag .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ms-accent);
}

/* Image placeholders — labelled rectangles */
.ms-imgph {
  position: relative;
  background: linear-gradient(135deg, var(--ms-navy-800) 0%, var(--ms-cyan-600) 100%);
  border-radius: var(--ms-r-lg);
  overflow: hidden;
  display: flex;
  align-items: end;
  padding: 24px;
  color: rgba(255,255,255,0.95);
  min-height: 240px;
}
.ms-imgph::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.18), transparent 50%),
    radial-gradient(circle at 20% 90%, rgba(44,181,217,0.4), transparent 50%);
}
.ms-imgph__label {
  position: relative;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(0,0,0,0.3);
  padding: 6px 10px;
  border-radius: 4px;
  backdrop-filter: blur(4px);
}

/* Sync curve — inspired by logo */
.ms-curve {
  position: absolute;
  pointer-events: none;
  opacity: 0.15;
}

/* Utilities */
.ms-grid { display: grid; gap: 24px; }
.ms-grid--2 { grid-template-columns: repeat(2, 1fr); }
.ms-grid--3 { grid-template-columns: repeat(3, 1fr); }
.ms-grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 920px) {
  .ms-grid--3, .ms-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .ms-grid--2, .ms-grid--3, .ms-grid--4 { grid-template-columns: 1fr; }
}

.ms-flex { display: flex; }
.ms-flex--col { flex-direction: column; }
.ms-gap-2 { gap: 8px; }
.ms-gap-3 { gap: 12px; }
.ms-gap-4 { gap: 16px; }
.ms-gap-5 { gap: 24px; }
.ms-gap-6 { gap: 32px; }

.ms-text-center { text-align: center; }
.ms-mx-auto { margin-left: auto; margin-right: auto; }

/* Scroll reveal */
.ms-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s ease, transform .7s ease;
}
.ms-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Numbers / stats */
.ms-stat__num {
  font-family: var(--ms-font-display);
  font-size: clamp(40px, 4vw, 56px);
  font-weight: 600;
  color: var(--ms-primary);
  letter-spacing: -0.02em;
  line-height: 1;
}
.ms-stat__label {
  font-size: 14px;
  color: var(--ms-muted);
  margin-top: 8px;
}