/* ==========================================================================
   OM Learn Child Theme v2.0 — Professional mindful learning design
   Color system grounded in the OM logomark (#CD440A family) + warm earth.
   ========================================================================== */

:root {
  --om-warm-white: #faf6f0;
  --om-paper: #fffcf7;
  --om-earth: #c94a1a;
  --om-earth-dark: #a33a0e;
  --om-earth-soft: rgba(201, 74, 26, 0.12);
  --om-deep: #1f1814;
  --om-walnut: #3d2e26;
  --om-clay: #e8d0be;
  --om-sand: #f0e6d8;
  --om-sand-deep: #e4d5c3;
  --om-muted: #6b5d55;
  --om-border: rgba(31, 24, 20, 0.10);
  --om-border-strong: rgba(31, 24, 20, 0.16);
  --om-shadow-sm: 0 4px 16px rgba(31, 24, 20, 0.04);
  --om-shadow: 0 12px 40px rgba(31, 24, 20, 0.07);
  --om-shadow-lg: 0 24px 64px rgba(31, 24, 20, 0.10);
  --om-radius-xs: 8px;
  --om-radius-sm: 12px;
  --om-radius: 18px;
  --om-radius-lg: 28px;
  --om-radius-xl: 40px;
  --om-shell: min(1120px, calc(100vw - 48px));
  --om-font: Inter, "Noto Sans TC", "Source Han Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, -apple-system, sans-serif;
  --om-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --om-duration: 0.35s;
}

html { scroll-behavior: smooth; }

body.om-learn-site {
  background: var(--om-warm-white);
  color: var(--om-deep);
  font-family: var(--om-font);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
body.om-learn-site * { box-sizing: border-box; }
body.om-learn-site a {
  color: var(--om-earth);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color var(--om-duration) var(--om-ease);
}
body.om-learn-site a:hover { color: var(--om-earth-dark); }
body.om-learn-site img { max-width: 100%; height: auto; display: block; }
body.om-learn-site h1,
body.om-learn-site h2,
body.om-learn-site h3,
body.om-learn-site h4 {
  color: var(--om-deep);
  font-family: var(--om-font);
  font-weight: 650;
  letter-spacing: -0.022em;
  text-wrap: balance;
}
body.om-learn-site h1 {
  font-size: clamp(2.75rem, 6.2vw, 5.25rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
}
body.om-learn-site h2 {
  font-size: clamp(1.85rem, 3.6vw, 3.25rem);
  line-height: 1.1;
}
body.om-learn-site h3 {
  font-size: clamp(1.2rem, 1.9vw, 1.55rem);
  line-height: 1.28;
}
body.om-learn-site :focus-visible {
  outline: 2px solid var(--om-earth);
  outline-offset: 3px;
  border-radius: 4px;
}

.om-shell { width: var(--om-shell); margin-inline: auto; }
.om-section { padding: clamp(64px, 8.5vw, 120px) 0; }
.om-kicker,
.om-eyebrow {
  margin: 0 0 16px;
  color: var(--om-earth);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.om-section-heading { max-width: 640px; margin-bottom: 48px; }
.om-section-heading h2 { margin: 0 0 16px; }
.om-section-heading > p:last-child {
  max-width: 560px;
  margin: 0;
  color: var(--om-muted);
  font-size: 1.0625rem;
  line-height: 1.65;
}
.om-section-heading--split {
  max-width: none;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
}
.om-section-heading--split > div { max-width: 560px; }

/* Header */
body.om-learn-site .site-header,
body.om-learn-site header.header-default,
body.om-learn-site .tutorstarter-header,
body.om-learn-site .header-wrapper {
  background: rgba(250, 246, 240, 0.88) !important;
  border-bottom: 1px solid var(--om-border);
  box-shadow: none !important;
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
}
body.om-learn-site .site-header { position: relative; z-index: 100; }
body.om-learn-site .site-header .container,
body.om-learn-site .header-wrapper .container { max-width: 1120px; }
body.om-learn-site .custom-logo { width: auto; max-height: 48px; }
body.om-learn-site .navbar-brand,
body.om-learn-site .site-title a {
  color: var(--om-deep) !important;
  font-weight: 700;
  letter-spacing: -0.02em;
}
body.om-learn-site .navbar-nav a,
body.om-learn-site .primary-menu a,
body.om-learn-site .menu-primary-container a {
  color: var(--om-walnut) !important;
  font-size: 0.9375rem;
  font-weight: 550;
  text-decoration: none;
  transition: color 0.2s ease;
}
body.om-learn-site .navbar-nav a:hover,
body.om-learn-site .navbar-nav .current-menu-item > a { color: var(--om-earth) !important; }

/* Buttons */
.om-button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}
.om-btn,
body.om-learn-site .tutor-btn,
body.om-learn-site .tutor-button,
body.om-learn-site button[type="submit"],
body.om-learn-site input[type="submit"] {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1.5px solid transparent;
  border-radius: var(--om-radius-sm) !important;
  font-family: var(--om-font);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  text-decoration: none !important;
  cursor: pointer;
  transition: transform var(--om-duration) var(--om-ease), background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, color 0.25s ease;
}
.om-btn:hover,
body.om-learn-site .tutor-btn:hover { transform: translateY(-2px); }
.om-btn:active { transform: translateY(0); }
.om-btn--primary,
body.om-learn-site .tutor-btn-primary,
body.om-learn-site .tutor-button,
body.om-learn-site button[type="submit"],
body.om-learn-site input[type="submit"] {
  background: var(--om-earth) !important;
  color: #fffaf5 !important;
  box-shadow: 0 8px 24px rgba(201, 74, 26, 0.22);
}
.om-btn--primary:hover,
body.om-learn-site .tutor-btn-primary:hover {
  background: var(--om-earth-dark) !important;
  box-shadow: 0 12px 28px rgba(201, 74, 26, 0.28);
}
.om-btn--secondary {
  background: transparent;
  border-color: var(--om-border-strong);
  color: var(--om-deep) !important;
}
.om-btn--secondary:hover {
  border-color: var(--om-earth);
  background: rgba(255, 252, 247, 0.7);
  color: var(--om-earth) !important;
}
.om-btn--light {
  background: var(--om-paper);
  color: var(--om-deep) !important;
  white-space: nowrap;
  box-shadow: var(--om-shadow-sm);
}
.om-btn--light:hover {
  background: #fff;
  box-shadow: var(--om-shadow);
}
.om-text-link {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  color: var(--om-earth) !important;
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none !important;
  letter-spacing: -0.01em;
}
.om-text-link span {
  transition: transform 0.25s var(--om-ease);
  display: inline-block;
}
.om-text-link:hover span { transform: translateX(4px); }

/* Hero */
.om-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(72px, 10vw, 140px) 0 clamp(72px, 9vw, 120px);
  background: var(--om-warm-white);
}
.om-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image: radial-gradient(rgba(31, 24, 20, 0.09) 0.7px, transparent 0.7px);
  background-size: 18px 18px;
  mask-image: linear-gradient(105deg, #000 0%, transparent 72%);
  -webkit-mask-image: linear-gradient(105deg, #000 0%, transparent 72%);
}
.om-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: clamp(40px, 7vw, 100px);
  align-items: center;
}
.om-hero__content { position: relative; z-index: 2; }
.om-hero h1 { max-width: 14ch; margin: 0; }
.om-hero__lead {
  max-width: 36ch;
  margin: 24px 0 0;
  color: var(--om-muted);
  font-size: clamp(1.0625rem, 1.7vw, 1.25rem);
  line-height: 1.6;
}
.om-hero__visual {
  min-height: 400px;
  display: grid;
  place-items: center;
}
.om-resonance {
  position: relative;
  width: min(380px, 100%);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}
.om-resonance span {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(201, 74, 26, 0.28);
}
.om-resonance span:nth-child(1) {
  inset: 2%;
  animation: om-pulse 8s ease-in-out infinite;
}
.om-resonance span:nth-child(2) {
  inset: 16%;
  border-color: rgba(31, 24, 20, 0.12);
  animation: om-pulse 8s ease-in-out 0.6s infinite;
}
.om-resonance span:nth-child(3) {
  inset: 30%;
  border-color: rgba(201, 74, 26, 0.38);
  animation: om-pulse 8s ease-in-out 1.2s infinite;
}
.om-resonance span:nth-child(4) {
  inset: 42%;
  background: linear-gradient(145deg, rgba(232, 208, 190, 0.7), rgba(201, 74, 26, 0.08));
  border: 0;
}
.om-resonance::before,
.om-resonance::after {
  content: "";
  position: absolute;
  width: 1px;
  height: 68%;
  background: linear-gradient(transparent, rgba(31, 24, 20, 0.14), transparent);
}
.om-resonance::before { transform: rotate(40deg); }
.om-resonance::after { transform: rotate(-46deg); }
.om-resonance img {
  position: relative;
  z-index: 2;
  width: 96px;
  height: 96px;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(201, 74, 26, 0.15));
}
@keyframes om-pulse {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.015); }
}

/* Paths */
.om-section--paths {
  background: var(--om-paper);
  border-block: 1px solid var(--om-border);
}
.om-path-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.om-path-card {
  position: relative;
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(22px, 2.8vw, 32px);
  background: var(--om-warm-white);
  border: 1px solid var(--om-border);
  border-radius: var(--om-radius);
  color: var(--om-deep) !important;
  text-decoration: none !important;
  overflow: hidden;
  transition: transform var(--om-duration) var(--om-ease), box-shadow var(--om-duration) var(--om-ease), border-color var(--om-duration) var(--om-ease);
}
.om-path-card::before {
  content: "";
  position: absolute;
  inset: auto -18% -30% 28%;
  aspect-ratio: 1;
  border: 1px solid rgba(201, 74, 26, 0.18);
  border-radius: 50%;
  pointer-events: none;
}
.om-path-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--om-shadow);
  border-color: rgba(201, 74, 26, 0.32);
}
.om-path-card--dark {
  background: var(--om-deep);
  color: var(--om-warm-white) !important;
  border-color: transparent;
}
.om-path-card--dark h3 { color: var(--om-warm-white) !important; }
.om-path-card--dark p { color: rgba(250, 246, 240, 0.68); }
.om-path-card--dark .om-path-card__label,
.om-path-card--dark .om-path-card__number { color: #e8a07a !important; }
.om-path-card__number {
  color: var(--om-earth);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.om-path-card__label {
  margin: 0 0 6px;
  color: var(--om-earth) !important;
  font-size: 0.8125rem;
  font-weight: 600;
}
.om-path-card h3 {
  margin: 0 0 12px;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  letter-spacing: -0.025em;
}
.om-path-card p {
  margin: 0;
  color: var(--om-muted);
  font-size: 0.9375rem;
  line-height: 1.55;
}
.om-card-arrow {
  position: absolute;
  top: 22px;
  right: 24px;
  font-size: 1.35rem;
  opacity: 0.7;
  transition: transform 0.3s var(--om-ease), opacity 0.3s ease;
}
.om-path-card:hover .om-card-arrow {
  transform: translate(3px, -3px);
  opacity: 1;
}

/* Courses */
.om-section--courses { background: var(--om-warm-white); }
.om-course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.om-course-card {
  background: var(--om-paper);
  border: 1px solid var(--om-border);
  border-radius: var(--om-radius);
  overflow: hidden;
  box-shadow: var(--om-shadow-sm);
  transition: transform var(--om-duration) var(--om-ease), box-shadow var(--om-duration) var(--om-ease);
}
.om-course-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--om-shadow);
}
.om-course-card__media {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--om-sand);
}
.om-course-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s var(--om-ease);
}
.om-course-card:hover .om-course-card__media img { transform: scale(1.04); }
.om-course-card__body { padding: 24px; }
.om-course-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
  color: var(--om-earth);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.om-course-card h3 { margin: 0 0 10px; font-size: 1.2rem; }
.om-course-card h3 a {
  color: var(--om-deep) !important;
  text-decoration: none !important;
}
.om-course-card h3 a:hover { color: var(--om-earth) !important; }
.om-course-card__body > p {
  min-height: 3.2em;
  margin: 0 0 20px;
  color: var(--om-muted);
  font-size: 0.9375rem;
  line-height: 1.55;
}
.om-empty-state {
  padding: 48px 32px;
  border: 1.5px dashed var(--om-border-strong);
  border-radius: var(--om-radius);
  background: rgba(255, 252, 247, 0.5);
  text-align: center;
}
.om-empty-state__icon {
  font-size: 2rem;
  color: var(--om-earth);
  opacity: 0.5;
  margin-bottom: 12px;
}
.om-empty-state p { margin-bottom: 0; color: var(--om-muted); }

/* Principles */
.om-section--principles { background: var(--om-sand); }
.om-principles {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(40px, 8vw, 100px);
  align-items: start;
}
.om-principles__statement { position: sticky; top: 120px; }
.om-principles__statement h2 { margin: 0; max-width: 14ch; }
.om-principles__list { border-top: 1px solid rgba(31, 24, 20, 0.14); }
.om-principles__list > div {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  padding: 26px 0;
  border-bottom: 1px solid rgba(31, 24, 20, 0.12);
}
.om-principles__list span {
  color: var(--om-earth);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding-top: 4px;
}
.om-principles__list p {
  margin: 0;
  font-size: clamp(1.0625rem, 1.8vw, 1.3rem);
  line-height: 1.5;
  color: var(--om-walnut);
}

/* CTA */
.om-section--cta { background: var(--om-paper); }
.om-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: clamp(36px, 5.5vw, 64px);
  background: var(--om-deep);
  border-radius: var(--om-radius-lg);
  color: var(--om-warm-white);
  overflow: hidden;
  position: relative;
}
.om-cta::after {
  content: "";
  position: absolute;
  width: 320px;
  aspect-ratio: 1;
  right: -100px;
  top: -110px;
  border: 1px solid rgba(232, 208, 190, 0.18);
  border-radius: 50%;
  box-shadow: 0 0 0 36px rgba(232, 208, 190, 0.04), 0 0 0 72px rgba(232, 208, 190, 0.025);
  pointer-events: none;
}
.om-cta > * { position: relative; z-index: 1; }
.om-cta .om-kicker { color: #e8a07a; }
.om-cta h2 {
  margin: 0 0 12px;
  color: var(--om-warm-white) !important;
  max-width: 16ch;
}
.om-cta p {
  max-width: 42ch;
  margin-bottom: 0;
  color: rgba(250, 246, 240, 0.68);
  font-size: 1.0625rem;
}

/* Content pages */
.om-page-hero {
  padding: clamp(64px, 8vw, 110px) 0 48px;
  background: var(--om-sand);
  border-bottom: 1px solid var(--om-border);
}
.om-page-hero h1 { max-width: 18ch; margin: 0; }
.om-landing-content,
.om-page-content { padding-block: 56px 96px; }
.om-prose { max-width: 680px; }
.om-prose > * + * { margin-top: 1.3em; }
.om-prose p,
.om-prose li {
  color: var(--om-walnut);
  font-size: 1.0625rem;
  line-height: 1.7;
}
.om-prose blockquote {
  margin-inline: 0;
  padding: 22px 26px;
  border-left: 3px solid var(--om-earth);
  background: var(--om-sand);
  border-radius: 0 var(--om-radius-sm) var(--om-radius-sm) 0;
  font-style: italic;
}

/* Tutor LMS */
body.om-learn-site .tutor-wrap { padding-block: 48px 88px; }
body.om-learn-site .tutor-container { max-width: 1120px; }
body.om-learn-site .tutor-card,
body.om-learn-site .tutor-course-card,
body.om-learn-site .tutor-course-single-content-wrapper,
body.om-learn-site .tutor-course-details-tab,
body.om-learn-site .tutor-course-single-sidebar-wrapper,
body.om-learn-site .tutor-dashboard-content,
body.om-learn-site .tutor-dashboard-left-menu {
  border-color: var(--om-border) !important;
  border-radius: var(--om-radius) !important;
  box-shadow: none !important;
  background: var(--om-paper);
}
body.om-learn-site .tutor-card:hover,
body.om-learn-site .tutor-course-card:hover { box-shadow: var(--om-shadow) !important; }
body.om-learn-site .tutor-color-primary,
body.om-learn-site .tutor-color-primary-hover:hover,
body.om-learn-site .tutor-course-name a:hover { color: var(--om-earth) !important; }
body.om-learn-site .tutor-bg-primary { background-color: var(--om-earth) !important; }
body.om-learn-site .tutor-form-control,
body.om-learn-site input[type="text"],
body.om-learn-site input[type="email"],
body.om-learn-site input[type="password"],
body.om-learn-site input[type="search"],
body.om-learn-site textarea,
body.om-learn-site select {
  min-height: 46px;
  border: 1.5px solid rgba(31, 24, 20, 0.14) !important;
  border-radius: var(--om-radius-sm) !important;
  background: #fff !important;
  color: var(--om-deep) !important;
  font-family: var(--om-font);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
body.om-learn-site textarea { min-height: 130px; }
body.om-learn-site .tutor-form-control:focus,
body.om-learn-site input:focus,
body.om-learn-site textarea:focus,
body.om-learn-site select:focus {
  border-color: var(--om-earth) !important;
  box-shadow: 0 0 0 3px var(--om-earth-soft) !important;
  outline: none !important;
}
body.om-learn-site .tutor-dashboard .tutor-dashboard-left-menu .tutor-dashboard-menu-item.active a,
body.om-learn-site .tutor-dashboard .tutor-dashboard-left-menu .tutor-dashboard-menu-item:hover a {
  background: var(--om-sand) !important;
  color: var(--om-earth) !important;
  border-radius: 10px;
}
body.om-learn-site .tutor-progress-bar .tutor-progress-value,
body.om-learn-site .tutor-progress-bar .tutor-progress-value span { background: var(--om-earth) !important; }
body.om-learn-site .tutor-course-details-header { background: var(--om-sand); }
body.om-learn-site .tutor-course-thumbnail img { border-radius: 14px; }
body.om-learn-site .tutor-accordion-item,
body.om-learn-site .tutor-course-topic { border-color: var(--om-border) !important; }
body.om-learn-site .tutor-accordion-item-header,
body.om-learn-site .tutor-course-topic-header {
  background: rgba(240, 230, 216, 0.55) !important;
  color: var(--om-deep) !important;
}
body.om-learn-site .tutor-pagination .page-numbers.current {
  background: var(--om-earth);
  border-color: var(--om-earth);
  color: white;
}

/* Footer */
body.om-learn-site .site-footer,
body.om-learn-site footer {
  background: var(--om-deep);
  color: rgba(250, 246, 240, 0.68);
}
body.om-learn-site .site-footer a,
body.om-learn-site footer a { color: var(--om-warm-white); }
body.om-learn-site .site-footer h2,
body.om-learn-site .site-footer h3,
body.om-learn-site footer h2,
body.om-learn-site footer h3 { color: var(--om-warm-white); }

/* Motion */
.om-js .om-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--om-ease), transform 0.6s var(--om-ease);
}
.om-js .om-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 980px) {
  :root { --om-shell: min(100% - 40px, 720px); }
  .om-hero__grid { grid-template-columns: 1fr; gap: 48px; }
  .om-hero__visual { min-height: 280px; order: -1; }
  .om-resonance { width: min(300px, 78vw); }
  .om-path-grid,
  .om-course-grid { grid-template-columns: 1fr 1fr; }
  .om-path-card:last-child { grid-column: 1 / -1; min-height: 280px; }
  .om-principles { grid-template-columns: 1fr; gap: 40px; }
  .om-principles__statement { position: static; }
}
@media (max-width: 640px) {
  :root { --om-shell: calc(100vw - 32px); }
  body.om-learn-site { font-size: 16px; }
  body.om-learn-site h1 { font-size: clamp(2.4rem, 12vw, 3.6rem); }
  .om-section { padding-block: 56px; }
  .om-hero { padding-top: 56px; padding-bottom: 64px; }
  .om-hero__visual { min-height: 240px; }
  .om-button-row { flex-direction: column; }
  .om-btn { width: 100%; }
  .om-path-grid,
  .om-course-grid { grid-template-columns: 1fr; }
  .om-path-card,
  .om-path-card:last-child { grid-column: auto; min-height: 300px; }
  .om-section-heading--split {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }
  .om-cta {
    align-items: stretch;
    flex-direction: column;
    gap: 28px;
  }
  .om-cta .om-btn { width: 100%; }
  body.om-learn-site .tutor-wrap { padding-top: 24px; }
  body.om-learn-site .custom-logo { max-height: 40px; max-width: 180px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .om-js .om-reveal { opacity: 1; transform: none; }
}