/* =========================================================
   DILAG SKIN & AESTHETIC CLINIC
   Design System / Global Stylesheet
   ========================================================= */

/* ---------- Design Tokens ---------- */
:root {
  /* Color */
  --ink: #1A1F1B;
  --ink-soft: #3B403C;
  --bone: #F4EFE6;
  --bone-deep: #ECE5D6;
  --paper: #FAF7F0;
  --moss: #2D3B2D;
  --moss-deep: #1F2A20;
  --moss-soft: #4A5A4B;
  --clay: #B0623E;
  --clay-deep: #8E4A2C;
  --clay-soft: #D89879;
  --sage: #8A9286;
  --sage-soft: #C5CBC4;
  --line: #D9D2C2;
  --line-soft: #E6E0D0;
  --white: #FFFFFF;

  /* Typography */
  --font-display: "Fraunces", "Cormorant Garamond", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, monospace;

  /* Type Scale (fluid) */
  --t-hero: clamp(2.75rem, 7vw + 1rem, 6.5rem);
  --t-h1: clamp(2.25rem, 4vw + 1rem, 4rem);
  --t-h2: clamp(1.75rem, 2.5vw + 0.5rem, 2.875rem);
  --t-h3: clamp(1.375rem, 1vw + 0.75rem, 1.875rem);
  --t-h4: clamp(1.125rem, 0.5vw + 0.875rem, 1.375rem);
  --t-body: clamp(1rem, 0.2vw + 0.9rem, 1.0625rem);
  --t-small: 0.875rem;
  --t-tiny: 0.75rem;

  /* Spacing (8pt system) */
  --s-1: 0.5rem;
  --s-2: 1rem;
  --s-3: 1.5rem;
  --s-4: 2rem;
  --s-5: 2.5rem;
  --s-6: 3rem;
  --s-7: 4rem;
  --s-8: 5rem;
  --s-9: 6rem;
  --s-10: 8rem;
  --s-11: 10rem;

  /* Layout */
  --max-w: 88rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --nav-h: 4.5rem;

  /* Misc */
  --radius-sm: 2px;
  --radius: 4px;
  --radius-lg: 8px;
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: 280ms var(--ease);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--t-body);
  line-height: 1.6;
  color: var(--ink);
  background: var(--bone);
  font-weight: 400;
  overflow-x: hidden;
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }

::selection { background: var(--clay); color: var(--bone); }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--moss-deep);
}

h1 { font-size: var(--t-h1); }
h2 { font-size: var(--t-h2); }
h3 { font-size: var(--t-h3); }
h4 { font-size: var(--t-h4); font-family: var(--font-body); font-weight: 600; letter-spacing: 0; }

p { max-width: 65ch; }
p + p { margin-top: var(--s-2); }

.display {
  font-family: var(--font-display);
  font-size: var(--t-hero);
  line-height: 0.95;
  letter-spacing: -0.03em;
  font-weight: 300;
}

.italic { font-style: italic; }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--t-tiny);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--clay);
}

.lede {
  font-size: clamp(1.125rem, 1vw + 0.875rem, 1.375rem);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 55ch;
}

.mono { font-family: var(--font-mono); font-size: var(--t-small); }
.small { font-size: var(--t-small); }
.tiny { font-size: var(--t-tiny); }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section { padding: clamp(3rem, 8vw, 7rem) 0; }
.section-tight { padding: clamp(2.5rem, 5vw, 4.5rem) 0; }

.divider {
  height: 1px;
  background: var(--line);
  border: none;
  width: 100%;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(244, 239, 230, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.site-header.scrolled {
  border-bottom-color: var(--line);
  background: rgba(244, 239, 230, 0.95);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  gap: var(--s-3);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--moss-deep);
}

.brand-mark {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--clay);
  margin-right: 0.5rem;
  transform: translateY(-2px);
}

.brand small {
  font-family: var(--font-body);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--sage);
}

.nav-primary {
  display: flex;
  align-items: center;
  gap: var(--s-4);
}

.nav-link {
  font-size: var(--t-small);
  font-weight: 500;
  color: var(--ink);
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--clay);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition);
}

.nav-link:hover { color: var(--clay); }
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); transform-origin: left; }

.nav-link.active { color: var(--clay); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.125rem;
  background: var(--moss-deep);
  color: var(--bone);
  font-size: var(--t-small);
  font-weight: 500;
  border-radius: var(--radius);
  transition: background var(--transition), transform var(--transition);
}

.nav-cta:hover { background: var(--clay); transform: translateY(-1px); }

.nav-cta::after {
  content: '→';
  font-family: var(--font-body);
  transition: transform var(--transition);
}

.nav-cta:hover::after { transform: translateX(3px); }

/* ---------- Mobile Nav ---------- */
.nav-toggle {
  display: none;
  width: 32px; height: 32px;
  position: relative;
  z-index: 101;
}

.nav-toggle span {
  display: block;
  position: absolute;
  left: 4px;
  width: 24px; height: 1.5px;
  background: var(--ink);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle span:nth-child(1) { top: 10px; }
.nav-toggle span:nth-child(2) { top: 16px; }
.nav-toggle span:nth-child(3) { top: 22px; }

.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  top: 0; right: 0;
  width: 100%;
  height: 100vh;
  background: var(--bone);
  z-index: 99;
  padding: calc(var(--nav-h) + 2rem) var(--gutter) 2rem;
  transform: translateX(100%);
  transition: transform 400ms var(--ease-out);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.mobile-menu.open { transform: translateX(0); }

.mobile-menu nav {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.mobile-menu .m-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--moss-deep);
  border-bottom: 1px solid var(--line);
  transition: color var(--transition), padding-left var(--transition);
}

.mobile-menu .m-link:hover,
.mobile-menu .m-link.active { color: var(--clay); padding-left: 0.5rem; }

.mobile-menu .m-link::after { content: '→'; font-family: var(--font-body); font-size: 1rem; opacity: 0.5; }

.mobile-menu .m-cta {
  margin-top: 2rem;
  padding: 1rem 1.5rem;
  background: var(--moss-deep);
  color: var(--bone);
  text-align: center;
  font-weight: 500;
  border-radius: var(--radius);
}

.mobile-menu .m-contact {
  margin-top: auto;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  font-size: var(--t-small);
  color: var(--ink-soft);
}

.mobile-menu .m-contact a { display: block; padding: 0.5rem 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.875rem 1.5rem;
  font-size: var(--t-small);
  font-weight: 500;
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--moss-deep);
  color: var(--bone);
}
.btn-primary:hover { background: var(--clay); transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  color: var(--moss-deep);
  border: 1px solid var(--moss-deep);
}
.btn-outline:hover { background: var(--moss-deep); color: var(--bone); }

.btn-clay {
  background: var(--clay);
  color: var(--bone);
}
.btn-clay:hover { background: var(--clay-deep); }

.btn-ghost {
  color: var(--ink);
  padding: 0.5rem 0;
  border-bottom: 1px solid currentColor;
  border-radius: 0;
}
.btn-ghost:hover { color: var(--clay); }

.btn-lg { padding: 1.125rem 2rem; font-size: 1rem; }

/* ---------- Cards ---------- */
.card {
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--line);
  box-shadow: 0 12px 32px -16px rgba(26, 31, 27, 0.18);
}

/* ---------- Forms ---------- */
.field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: var(--s-3);
}

.field label {
  font-size: var(--t-small);
  font-weight: 500;
  color: var(--ink);
}

.field label .req { color: var(--clay); }

.field input,
.field textarea,
.field select {
  padding: 0.875rem 1rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: var(--t-body);
  color: var(--ink);
  transition: border-color var(--transition), background var(--transition);
  width: 100%;
  font-family: var(--font-body);
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--moss);
  background: var(--white);
}

.field textarea { min-height: 120px; resize: vertical; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-3);
}

.field-error {
  font-size: var(--t-tiny);
  color: var(--clay-deep);
  margin-top: 0.25rem;
  display: none;
}

.field.invalid .field-error { display: block; }
.field.invalid input,
.field.invalid textarea,
.field.invalid select { border-color: var(--clay-deep); }

/* ---------- Accordion ---------- */
.accordion-item {
  border-bottom: 1px solid var(--line);
}

.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1.5rem 0;
  text-align: left;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--moss-deep);
  gap: 1rem;
}

.accordion-trigger:hover { color: var(--clay); }

.accordion-icon {
  flex-shrink: 0;
  width: 24px; height: 24px;
  position: relative;
}

.accordion-icon::before,
.accordion-icon::after {
  content: '';
  position: absolute;
  background: currentColor;
  transition: transform var(--transition);
}

.accordion-icon::before {
  top: 50%; left: 0;
  width: 100%; height: 1px;
  transform: translateY(-50%);
}

.accordion-icon::after {
  top: 0; left: 50%;
  width: 1px; height: 100%;
  transform: translateX(-50%);
}

.accordion-item.open .accordion-icon::after { transform: translateX(-50%) rotate(90deg); opacity: 0; }

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 400ms var(--ease);
}

.accordion-panel-inner {
  padding-bottom: 1.5rem;
  color: var(--ink-soft);
  max-width: 65ch;
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.bg-moss { background: var(--moss-deep); color: var(--bone); }
.bg-moss h1, .bg-moss h2, .bg-moss h3, .bg-moss h4 { color: var(--bone); }
.bg-paper { background: var(--paper); }
.bg-bone-deep { background: var(--bone-deep); }

/* ---------- Animations ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Responsive Breakpoints ---------- */
@media (max-width: 1024px) {
  .nav-primary { display: none; }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }
}

@media (max-width: 768px) {
  :root {
    --nav-h: 4rem;
    --s-10: 5rem;
    --s-11: 6rem;
  }
  .field-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .brand { font-size: 1.25rem; }
  .brand small { display: none; }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .site-footer, .nav-toggle, .mobile-menu { display: none; }
  body { background: white; color: black; }
}