/* ========================================
   KAIROS — Component Styles
   ======================================== */

/* ---- Utility ---- */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}
.container--narrow {
  max-width: var(--content-default);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

/* ---- Section ---- */
.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-32));
}
.section--alt {
  background: var(--color-surface);
}
.section--dark {
  background: var(--color-surface-offset);
}

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  max-width: 18ch;
}
.section-heading--center {
  text-align: center;
  margin-inline: auto;
  max-width: 24ch;
}

.section-body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 65ch;
  line-height: 1.7;
  margin-bottom: var(--space-10);
}
.section-body--center {
  text-align: center;
  margin-inline: auto;
}

/* ---- Navigation ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.06);
  transition: box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav--scrolled {
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .nav__inner { padding: var(--space-3) var(--space-8); }
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}
.nav__logo-text {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.15em;
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-6);
}
@media (min-width: 1024px) {
  .nav__links { display: flex; }
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) 0;
  transition: color var(--transition-interactive);
}
.nav__link:hover {
  color: var(--color-text);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__cta {
  display: none;
}
@media (min-width: 768px) {
  .nav__cta { display: inline-flex; }
}

.nav__hamburger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: background var(--transition-interactive);
}
.nav__hamburger:hover {
  background: var(--color-surface);
}
@media (min-width: 1024px) {
  .nav__hamburger { display: none; }
}

/* Mobile menu */
.nav__mobile {
  display: none;
  padding: var(--space-4) var(--space-4) var(--space-6);
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.06);
}
.nav__mobile.is-open {
  display: flex;
  flex-direction: column;
}
@media (min-width: 1024px) {
  .nav__mobile { display: none !important; }
}
.nav__mobile-link {
  display: block;
  padding: var(--space-3) 0;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  text-decoration: none;
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.06);
  transition: color var(--transition-interactive);
}
.nav__mobile-link:hover {
  color: var(--color-text);
}

/* ---- Theme Toggle ---- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive),
              background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive),
              border-color var(--transition-interactive);
}

.btn--sm {
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-4);
}
.btn--lg {
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-6);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--primary:active {
  background: var(--color-primary-active);
  transform: translateY(0);
  box-shadow: none;
}

.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn--secondary:hover {
  background: var(--color-primary-highlight);
  transform: translateY(-1px);
}
.btn--secondary:active {
  transform: translateY(0);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
}
.btn--ghost:hover {
  color: var(--color-text);
}

/* ---- Hero ---- */
.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  overflow: hidden;
}
.hero__content {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
  display: grid;
  gap: var(--space-10);
  align-items: center;
}
@media (min-width: 768px) {
  .hero__content { padding-inline: var(--space-8); }
}
@media (min-width: 1024px) {
  .hero__content {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-16);
  }
}

.hero__headline {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-text);
  margin-bottom: var(--space-6);
  line-height: 1.08;
}

.hero__sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 50ch;
  margin-bottom: var(--space-8);
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero__visual img {
  border-radius: var(--radius-xl);
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  object-position: center;
}
@media (min-width: 1024px) {
  .hero__visual img {
    aspect-ratio: auto;
    max-height: 480px;
  }
}

/* ---- Principles / Philosophy cards ---- */
.principles {
  display: grid;
  gap: var(--space-6);
}
@media (min-width: 768px) {
  .principles { grid-template-columns: repeat(3, 1fr); }
}

.principle-card {
  padding: var(--space-6);
  background: var(--color-bg);
  border: 1px solid oklch(from var(--color-text) l c h / 0.06);
  border-radius: var(--radius-lg);
}
.principle-card__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}
.principle-card__title {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}
.principle-card__body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ---- Modules Grid ---- */
.modules-group {
  margin-bottom: var(--space-10);
}
.modules-group:last-child {
  margin-bottom: 0;
}
.modules-group__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-divider);
}

.modules-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .modules-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .modules-grid { grid-template-columns: repeat(3, 1fr); }
}

.module-card {
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.05);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-interactive),
              border-color var(--transition-interactive);
}
.module-card:hover {
  border-color: oklch(from var(--color-primary) l c h / 0.2);
  box-shadow: var(--shadow-sm);
}

.module-card__number {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  font-variant-numeric: tabular-nums;
}
.module-card__name {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
}
.module-card__desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ---- Intelligence Grid ---- */
.intel-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .intel-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .intel-grid { grid-template-columns: repeat(3, 1fr); }
}

.intel-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.05);
  border-radius: var(--radius-lg);
}
.intel-card__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.intel-card__title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
}
.intel-card__body {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ---- Stats ---- */
.stats-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(2, 1fr);
  margin-top: var(--space-10);
}
@media (min-width: 768px) {
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
}

.stat-card {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.05);
  border-radius: var(--radius-lg);
}
.stat-card__value {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}
.stat-card__value--text {
  font-size: var(--text-xl);
}
.stat-card__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* ---- Certification Progression ---- */
.cert-progression {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
  padding-block: var(--space-4);
}
@media (min-width: 768px) {
  .cert-progression { gap: var(--space-4); }
}

.cert-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}
.cert-badge__level {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  background: var(--color-bg);
  transition: background var(--transition-interactive),
              color var(--transition-interactive);
}
@media (min-width: 768px) {
  .cert-badge__level { width: 64px; height: 64px; font-size: var(--text-sm); }
}

.cert-badge--gold .cert-badge__level {
  border-color: var(--color-gold);
  color: var(--color-gold);
}
.cert-badge__name {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
}

.cert-arrow {
  color: var(--color-text-faint);
  flex-shrink: 0;
}
/* Hide arrows on very small screens to prevent wrapping issues */
@media (max-width: 480px) {
  .cert-arrow { display: none; }
  .cert-progression { gap: var(--space-4); }
}

.cert-cta {
  text-align: center;
}

/* ---- CTA Section ---- */
.section--cta {
  background: var(--color-surface);
  text-align: center;
}
.section--cta .section-heading {
  max-width: 20ch;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

/* ---- Footer ---- */
.footer {
  padding: var(--space-10) var(--space-4);
  border-top: 1px solid var(--color-divider);
}
.footer__inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
    padding-inline: var(--space-4);
  }
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
}
.footer__wordmark {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
}
.footer__tagline {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer__links {
  display: flex;
  gap: var(--space-6);
}
.footer__link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer__link:hover {
  color: var(--color-text);
}

.footer__meta {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.footer__attribution {
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer__attribution:hover {
  color: var(--color-text-muted);
}

/* ---- Scroll Animations ---- */
.fade-in {
  opacity: 1; /* Fallback: visible by default */
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* Also support clip-path reveal for some elements */
@supports (animation-timeline: scroll()) {
  .reveal-clip {
    clip-path: inset(100% 0 0 0);
    animation: clip-reveal linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
  }
}

@keyframes clip-reveal {
  to { clip-path: inset(0 0 0 0); }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .fade-in,
  .reveal-clip {
    opacity: 1 !important;
    clip-path: none !important;
    animation: none !important;
  }
}