/* ==========================================================================
   ITTHIWET ANIMAL HOSPITAL — Design System
   Direction: Modern Pet Healthcare + Premium Friendly
   Font: IBM Plex Sans Thai (single family, used consistently)
   ========================================================================== */

:root {
  /* --- Color: Blue system (client-mandated, kept restrained) --- */
  --color-primary: #0B5FA8;      /* Primary Blue */
  --color-primary-600: #0A548F;  /* hover/active */
  --color-navy: #0B2C4D;         /* Dark Navy */
  --color-sky: #E7F1FB;          /* Light Blue tint (backgrounds) */
  --color-sky-200: #CFE4F7;      /* Light Blue, slightly deeper */
  --color-white: #FFFFFF;
  --color-gray-50: #F6F8FA;
  --color-gray-100: #EEF1F4;
  --color-gray-300: #CBD3DA;
  --color-gray-500: #6B7684;
  --color-gray-700: #3B4652;
  --color-ink: #16232E;          /* primary text */
  --color-success: #1F9E63;      /* Success Green */
  --color-success-tint: #E8F7EF;

  /* --- Typography --- */
  --font-body: 'IBM Plex Sans Thai', 'IBM Plex Sans', system-ui, sans-serif;
  --fs-xs: 0.8125rem;
  --fs-sm: 0.9375rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.375rem;
  --fs-2xl: 1.75rem;
  --fs-3xl: 2.25rem;
  --fs-4xl: 3rem;

  /* --- Radius / Shadow (Premium Friendly cards) --- */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(11, 44, 77, 0.06);
  --shadow-md: 0 8px 24px rgba(11, 44, 77, 0.10);
  --shadow-lg: 0 16px 40px rgba(11, 44, 77, 0.14);

  /* --- Layout --- */
  --container-max: 1200px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  --transition-base: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-white);
  font-size: var(--fs-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 700; color: var(--color-navy); line-height: 1.25; }
p { margin: 0; }

/* Reduced motion respect */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* Visible focus state (accessibility) */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --- Layout helpers --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}
.section { padding: var(--space-7) 0; }
@media (max-width: 640px) {
  .section { padding: var(--space-6) 0; }
}
.section-tinted { background: var(--color-sky); }
.section-head { max-width: 640px; margin: 0 auto var(--space-6); text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  background: var(--color-sky);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: var(--space-3);
}
.section-title { font-size: var(--fs-3xl); }
.section-sub { color: var(--color-gray-700); margin-top: var(--space-2); font-size: var(--fs-lg); }
@media (max-width: 640px) {
  .section-title { font-size: var(--fs-2xl); }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: var(--fs-sm);
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  min-height: 48px;
}
.btn-primary { background: var(--color-primary); color: var(--color-white); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--color-primary-600); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn-outline { background: var(--color-white); color: var(--color-primary); border-color: var(--color-sky-200); }
.btn-outline:hover { border-color: var(--color-primary); background: var(--color-sky); }
.btn-ghost { background: transparent; color: var(--color-navy); }
.btn-ghost:hover { background: var(--color-gray-100); }
.btn-sm { padding: 9px 18px; font-size: var(--fs-xs); min-height: 38px; }
.btn-block { width: 100%; }

/* --- Cards --- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.card-body { padding: var(--space-4); }
.card-media { aspect-ratio: 4 / 3; background: var(--color-sky); position: relative; overflow: hidden; }
.card-media img { width: 100%; height: 100%; object-fit: cover; }
.card-title { font-size: var(--fs-lg); margin-bottom: var(--space-2); }
.card-text { color: var(--color-gray-700); font-size: var(--fs-sm); }

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-xs);
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}
.badge-success { background: var(--color-success-tint); color: var(--color-success); }
.badge-primary { background: var(--color-sky); color: var(--color-primary); }

/* --- Forms / Inputs (used in contact + admin) --- */
.field { margin-bottom: var(--space-4); }
.field label { display: block; font-weight: 600; font-size: var(--fs-sm); margin-bottom: 6px; color: var(--color-navy); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: var(--fs-base);
  color: var(--color-ink);
  background: var(--color-white);
  transition: border-color var(--transition-base);
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--color-primary);
  outline: none;
}
.field-hint { font-size: var(--fs-xs); color: var(--color-gray-500); margin-top: 4px; }

/* --- Tables (pricing tables etc.) --- */
.table-wrap { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--color-gray-100); }
table.data-table { width: 100%; border-collapse: collapse; min-width: 480px; }
table.data-table th, table.data-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-gray-100);
  font-size: var(--fs-sm);
  white-space: nowrap;
}
table.data-table th { background: var(--color-sky); color: var(--color-navy); font-weight: 700; }
table.data-table tr:last-child td { border-bottom: none; }

/* --- Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-gray-100);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--color-navy); }
.brand-mark {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--color-primary); color: var(--color-white);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 800;
}
.brand-text { line-height: 1.15; }
.brand-text small { display: block; font-weight: 500; font-size: 0.7rem; color: var(--color-gray-500); }

.nav-links { display: flex; align-items: center; gap: var(--space-5); }
.nav-links a { font-size: var(--fs-sm); font-weight: 600; color: var(--color-gray-700); transition: color var(--transition-base); }
.nav-links a:hover { color: var(--color-primary); }
.nav-actions { display: flex; align-items: center; gap: var(--space-3); }

.nav-toggle { display: none; background: none; border: none; padding: 8px; }
@media (max-width: 960px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
}

/* Mobile menu drawer */
.mobile-menu {
  display: none;
  position: fixed; inset: 0; z-index: 100;
  background: rgba(11, 44, 77, 0.35);
}
.mobile-menu.open { display: block; }
.mobile-menu-panel {
  background: var(--color-white);
  width: min(320px, 84vw);
  height: 100%;
  margin-left: auto;
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column; gap: var(--space-2);
}
.mobile-menu-panel a { padding: 14px 8px; font-weight: 600; border-bottom: 1px solid var(--color-gray-100); font-size: var(--fs-lg); }

/* --- Footer --- */
.site-footer { background: var(--color-navy); color: rgba(255,255,255,0.85); padding: var(--space-7) 0 var(--space-4); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--space-6); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-title { color: var(--color-white); font-size: var(--fs-base); margin-bottom: var(--space-3); }
.footer-grid a, .footer-grid p { color: rgba(255,255,255,0.7); font-size: var(--fs-sm); line-height: 2; }
.footer-grid a:hover { color: var(--color-white); }
.footer-bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255,255,255,0.12);
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.55);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-2);
}

/* --- Floating contact (mobile) --- */
.floating-contact {
  position: fixed;
  bottom: 18px; right: 18px;
  z-index: 60;
  display: flex; flex-direction: column; gap: 10px;
}
.floating-contact a {
  width: 52px; height: 52px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-white); box-shadow: var(--shadow-md);
  border: 1px solid var(--color-gray-100);
  color: var(--color-primary);
}
.floating-contact a.fc-primary { background: var(--color-primary); color: var(--color-white); }

/* --- Empty / Loading states --- */
.empty-state { text-align: center; padding: var(--space-7) var(--space-4); color: var(--color-gray-500); }
.empty-state h3 { color: var(--color-navy); margin-bottom: var(--space-2); }

/* --- Utility --- */
.grid { display: grid; gap: var(--space-4); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; } }

/* Scroll reveal (subtle, respects prefers-reduced-motion via global rule above) */
[data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity 560ms ease, transform 560ms ease; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap;
}