/* ============================================================
   Tan'n'go Treatment Guide — Stylesheet
   Mobile-first, premium beauty aesthetic
   ============================================================ */

/* ── Design Tokens ──────────────────────────────────────── */
:root {
  /* Colour palette */
  --c-bg:              #FAFAF8;
  --c-surface:         #FFFFFF;
  --c-surface-raised:  #FFFFFF;
  --c-lavender-pale:   #F2EEF9;
  --c-lavender:        #D9CCF0;
  --c-purple-light:    #B49ED8;
  --c-purple:          #8B6FB8;
  --c-purple-dark:     #6A4E9C;
  --c-text:            #2D2834;
  --c-text-muted:      #8C859E;
  --c-text-faint:      #BAB3CC;
  --c-border:          #E9E2F5;
  --c-success:         #7BAE8C;

  /* Typography */
  --f-serif:  'Playfair Display', Georgia, 'Times New Roman', serif;
  --f-sans:   'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;

  /* Radii */
  --r-sm:  8px;
  --r-md:  16px;
  --r-lg:  24px;
  --r-xl:  32px;

  /* Shadows */
  --shadow-xs:     0 1px 4px  rgba(107, 78, 156, 0.06);
  --shadow-sm:     0 2px 10px rgba(107, 78, 156, 0.08);
  --shadow-md:     0 4px 24px rgba(107, 78, 156, 0.12);
  --shadow-lg:     0 8px 40px rgba(107, 78, 156, 0.18);
  --shadow-active: 0 6px 32px rgba(107, 78, 156, 0.22);

  /* Layout */
  --header-h:   68px;
  --timeline-h: 60px;
  --max-w:      860px;
  --page-px:    24px;

  /* Transitions */
  --t-fast:   0.15s ease;
  --t-base:   0.25s ease;
  --t-slow:   0.4s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  /* Proximity snapping — user can scroll freely, sections snap softly */
  /* scroll-snap-type: y proximity; */
}

body {
  font-family: var(--f-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Suppress animation flash on first load */
body.js-loading * {
  animation-play-state: paused !important;
}

/* ── Site Header ────────────────────────────────────────── */
.site-header {
  height: var(--header-h);
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
}

.site-header__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 var(--page-px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* Brand */
.brand {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex-shrink: 0;
}

.brand__name {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--c-purple-dark);
  letter-spacing: -0.01em;
  line-height: 1;
}

.brand__tagline {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--c-text-muted);
  line-height: 1;
}

/* Appointment badge */
.appointment-badge {
  text-align: right;
  min-width: 0;
}

.appointment-badge__label {
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-text-muted);
  margin-bottom: 2px;
}

.appointment-badge__date {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--c-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Sticky Progress Timeline ───────────────────────────── */
.progress-timeline {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--timeline-h);
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--shadow-sm);
}

.progress-timeline__inner {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 var(--page-px);
  display: flex;
  align-items: center;
  overflow-x: auto;
  /* Hide scrollbar — user navigates via stage nodes */
  scrollbar-width: none;
  -ms-overflow-style: none;
  gap: 0;
}

.progress-timeline__inner::-webkit-scrollbar {
  display: none;
}

/* Connecting track behind the nodes */
.timeline-track {
  position: absolute;
  top: 50%;
  left: var(--page-px);
  right: var(--page-px);
  height: 2px;
  background: var(--c-border);
  transform: translateY(-50%);
  pointer-events: none;
  border-radius: 2px;
  overflow: hidden;
}

.timeline-track__fill {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--c-purple-dark) 0%,
    var(--c-purple-light) 100%
  );
  border-radius: 2px;
  transition: width 0.5s ease;
  width: 0%;
}

/* Individual stage node */
.timeline-node {
  position: relative;
  z-index: 1;
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 4px 2px;
  cursor: pointer;
  border: none;
  background: transparent;
  /* Remove tap highlight on mobile */
  -webkit-tap-highlight-color: transparent;
}

.timeline-node:focus-visible {
  outline: 2px solid var(--c-purple);
  outline-offset: 2px;
  border-radius: 4px;
}

.timeline-node__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--c-border);
  background: var(--c-surface);
  transition:
    width var(--t-base),
    height var(--t-base),
    background var(--t-base),
    border-color var(--t-base),
    box-shadow var(--t-base);
  flex-shrink: 0;
}

.timeline-node__label {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--c-text-faint);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 68px;
  transition: color var(--t-base);
  line-height: 1.2;
}

/* Past node */
.timeline-node.is-past .timeline-node__dot {
  background: var(--c-purple-light);
  border-color: var(--c-purple-light);
}

.timeline-node.is-past .timeline-node__label {
  color: var(--c-purple-light);
}

/* Active node */
.timeline-node.is-active .timeline-node__dot {
  width: 14px;
  height: 14px;
  background: var(--c-purple);
  border-color: var(--c-purple);
  box-shadow: 0 0 0 4px rgba(139, 111, 184, 0.18);
}

.timeline-node.is-active .timeline-node__label {
  color: var(--c-purple);
  font-weight: 500;
}

/* Special: appointment node */
.timeline-node.is-appointment .timeline-node__dot {
  width: 16px;
  height: 16px;
  background: var(--c-purple-dark);
  border-color: var(--c-purple-dark);
}

.timeline-node.is-appointment.is-past .timeline-node__dot,
.timeline-node.is-appointment.is-active .timeline-node__dot {
  background: var(--c-purple-dark);
  border-color: var(--c-purple-dark);
}

/* ── No-timestamp Notice ────────────────────────────────── */
.no-timestamp-notice {
  padding: 48px var(--page-px) 0;
  display: flex;
  justify-content: center;
}

.notice-card {
  background: var(--c-surface);
  border-radius: var(--r-lg);
  border: 1px solid var(--c-border);
  padding: 40px 32px;
  max-width: 420px;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.notice-card__icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
  line-height: 1;
}

.notice-card h2 {
  font-family: var(--f-serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 10px;
}

.notice-card p {
  font-size: 0.875rem;
  color: var(--c-text-muted);
  line-height: 1.7;
}

/* ── Stages Container ───────────────────────────────────── */
.stages-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 36px var(--page-px) 80px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ── Stage Card ─────────────────────────────────────────── */
.stage-section {
  background: var(--c-surface);
  border-radius: var(--r-lg);
  border: 1.5px solid var(--c-border);
  padding: 36px 32px;
  box-shadow: var(--shadow-xs);
  transition:
    opacity var(--t-slow),
    border-color var(--t-slow),
    box-shadow var(--t-slow);
  /* Offset accounts for sticky timeline height */
  scroll-snap-align: start;
  scroll-margin-top: calc(var(--timeline-h) + 12px);
  animation: stage-enter 0.45s ease both;
}

/* Past: visually faded */
.stage-section.is-past {
  opacity: 0.55;
}

.stage-section.is-past:hover {
  opacity: 0.75;
}

/* Future: subdued */
.stage-section.is-future {
  opacity: 0.45;
}

.stage-section.is-future:hover {
  opacity: 0.65;
}

/* Current: prominent */
.stage-section.is-current {
  border-color: var(--c-purple);
  box-shadow: var(--shadow-active);
  opacity: 1;
}

/* ── Stage Header ───────────────────────────────────────── */
.stage-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 24px;
}

.stage-header__icon {
  width: 46px;
  height: 46px;
  border-radius: var(--r-sm);
  background: var(--c-lavender-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
  line-height: 1;
}

.stage-header__text {
  flex: 1;
  min-width: 0;
}

.stage-header__timeline-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-purple);
  margin-bottom: 4px;
}

.stage-header__title {
  font-family: var(--f-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--c-text);
  line-height: 1.3;
  margin-bottom: 4px;
}

.stage-header__subtitle {
  font-size: 0.875rem;
  color: var(--c-text-muted);
  line-height: 1.5;
}

/* Status badge */
.stage-header__badge-wrap {
  flex-shrink: 0;
}

.stage-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 11px;
  border-radius: 100px;
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.stage-badge--current {
  background: var(--c-purple);
  color: #fff;
}

.stage-badge--past {
  background: var(--c-lavender-pale);
  color: var(--c-purple-light);
}

.stage-badge--future {
  background: var(--c-lavender-pale);
  color: var(--c-text-faint);
}

.stage-badge__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

/* ── Countdown Component ────────────────────────────────── */
.countdown {
  background: var(--c-lavender-pale);
  border-radius: var(--r-md);
  padding: 22px 20px 18px;
  margin-bottom: 22px;
  text-align: center;
}

.countdown__label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-purple);
  margin-bottom: 14px;
}

.countdown__display {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 2px;
}

.countdown__unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 54px;
}

.countdown__value {
  font-family: var(--f-serif);
  font-size: 2.1rem;
  font-weight: 600;
  color: var(--c-purple-dark);
  line-height: 1;
  letter-spacing: -0.02em;
  min-width: 2ch;
  text-align: center;
}

.countdown__unit-label {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-text-muted);
  margin-top: 5px;
}

.countdown__sep {
  font-size: 1.8rem;
  color: var(--c-lavender);
  line-height: 1;
  padding-bottom: 6px;
  font-family: var(--f-serif);
  user-select: none;
}

.countdown__passed {
  font-family: var(--f-serif);
  font-style: italic;
  color: var(--c-text-muted);
  font-size: 1rem;
  padding: 4px 0;
}

/* ── Stage Body ─────────────────────────────────────────── */
.stage-body {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* Section sub-label */
.sub-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-text-muted);
  font-weight: 500;
  margin-bottom: 10px;
}

/* Checklist */
.checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--c-text);
  line-height: 1.5;
}

.checklist__item-check {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid var(--c-lavender);
  flex-shrink: 0;
  margin-top: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--t-base), border-color var(--t-base);
}

.is-past .checklist__item-check {
  background: var(--c-purple-light);
  border-color: var(--c-purple-light);
}

.checklist__item-check svg {
  display: none;
  color: #fff;
}

.is-past .checklist__item-check svg {
  display: block;
}

/* Image placeholder */
.img-placeholder {
  aspect-ratio: 16 / 9;
  background: var(--c-lavender-pale);
  border-radius: var(--r-md);
  border: 2px dashed var(--c-lavender);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--c-text-faint);
  font-size: 0.8rem;
  text-align: center;
  padding: 20px;
}

.img-placeholder__icon {
  font-size: 1.6rem;
  line-height: 1;
}

/* Notes / tips block */
.stage-notes {
  background: var(--c-lavender-pale);
  border-left: 3px solid var(--c-purple-light);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  padding: 14px 18px;
}

.stage-notes p {
  font-size: 0.875rem;
  color: var(--c-text-muted);
  line-height: 1.7;
}

/* ── End-of-guide divider ───────────────────────────────── */
.guide-end-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0 4px;
}

.guide-end-divider__line {
  flex: 1;
  height: 1px;
  background: var(--c-border);
}

.guide-end-divider__text {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--c-text-faint);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Booking CTA card (Booksy) ──────────────────────────── */
.stage-section--booking {
  background: #000000;
  border-color: #000000;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.22);
  /* Override opacity states — this card is always fully visible */
  opacity: 1 !important;
}

.stage-section--booking:hover {
  border-color: #000000;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.28);
}

/* Booksy logo lockup */
.booksy-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

/* The teal rounded-square brand mark */
.booksy-logo__mark {
  width: 34px;
  height: 34px;
  background: #05CFA6;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-sans);
  font-weight: 800;
  font-size: 1.15rem;
  color: #000000;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  line-height: 1;
}

/* "booksy" wordmark */
.booksy-logo__word {
  font-family: var(--f-sans);
  font-weight: 800;
  font-size: 1.45rem;
  color: #ffffff;
  letter-spacing: -0.04em;
  line-height: 1;
}

/* CTA text content */
.booking-cta__eyebrow {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: #05CFA6;
  margin-bottom: 10px;
}

.booking-cta__title {
  font-family: var(--f-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 8px;
}

.booking-cta__subtitle {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.65;
  margin-bottom: 28px;
}

/* Teal CTA button */
.booksy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #05CFA6;
  color: #000000;
  font-family: var(--f-sans);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 26px;
  border-radius: var(--r-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: opacity var(--t-fast), transform var(--t-fast);
  -webkit-tap-highlight-color: transparent;
}

.booksy-btn:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.booksy-btn:active {
  transform: translateY(0);
  opacity: 1;
}

.booksy-btn--disabled {
  opacity: 0.35;
  pointer-events: none;
  cursor: default;
}

/* ── Animations ─────────────────────────────────────────── */
@keyframes stage-enter {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Final opacity is overridden by state classes after animation */
.stage-section.is-past  { animation-name: stage-enter; }
.stage-section.is-future { animation-name: stage-enter; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ── Footer ─────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--c-border);
  padding: 20px var(--page-px);
  background: var(--c-surface);
}

.site-footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.site-footer__brand {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--c-purple-dark);
}

.site-footer__copy {
  font-size: 0.78rem;
  color: var(--c-text-muted);
}

/* ── Responsive: tablet ─────────────────────────────────── */
@media (max-width: 680px) {
  :root {
    --header-h:   60px;
    --timeline-h: 54px;
    --page-px:    16px;
  }

  .brand__name {
    font-size: 1.35rem;
  }

  .stages-container {
    padding-top: 24px;
    gap: 14px;
  }

  .stage-section {
    padding: 26px 20px;
  }

  .stage-header {
    flex-wrap: wrap;
  }

  /* Move badge above title on narrow screens */
  .stage-header__badge-wrap {
    order: -1;
    width: 100%;
  }

  .stage-header__icon {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }

  .stage-header__title {
    font-size: 1.2rem;
  }

  .countdown__value {
    font-size: 1.7rem;
  }

  .countdown__unit {
    min-width: 46px;
  }

  .timeline-node__label {
    font-size: 0.55rem;
    max-width: 52px;
  }
}

/* ── Responsive: small phone ────────────────────────────── */
@media (max-width: 460px) {
  /* Hide labels on very small screens, keep dots only */
  .timeline-node__label {
    display: none;
  }

  .timeline-node__dot {
    width: 9px;
    height: 9px;
  }

  .timeline-node.is-active .timeline-node__dot {
    width: 13px;
    height: 13px;
  }

  .appointment-badge__date {
    font-size: 0.75rem;
  }
}