/**
 * Black Bear AI - Component Styles
 * Corporate landing page — SDLC→ADLC transformation
 * WCAG 2.2 Level AA compliant
 */

/* ===================================
   Base Styles
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  background-color: var(--color-black);
  color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);

  /* Geometric background pattern */
  background-image:
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 80px,
      rgba(17, 17, 17, 0.06) 80px,
      rgba(17, 17, 17, 0.06) 81px
    ),
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 80px,
      rgba(17, 17, 17, 0.06) 80px,
      rgba(17, 17, 17, 0.06) 81px
    );
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===================================
   Shared Layout
   =================================== */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

/* ===================================
   Section Base
   =================================== */

.section {
  padding: var(--space-10) 0;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.section__heading {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.section__subheading {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  margin-bottom: var(--space-3);
}

/* ===================================
   Navigation
   =================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4);
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  opacity: 0;
  transform: translateY(-100%);
  transition: opacity var(--transition-base) ease, transform var(--transition-base) ease;
  pointer-events: none;
}

.nav--visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-white);
}

.nav__logo {
  height: 30px;
  width: auto;
}

.nav__wordmark {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  letter-spacing: -0.01em;
  line-height: 1;
}

/* ===================================
   Buttons
   =================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-primary);
  font-weight: var(--font-semibold);
  font-size: var(--text-base);
  line-height: 1;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast) ease,
              color var(--transition-fast) ease,
              border-color var(--transition-fast) ease;
  min-height: 48px;
  min-width: 48px;
  border-radius: var(--radius-sm);
}

.btn--primary {
  background-color: var(--color-red-vermilion);
  color: var(--color-white);
  padding: 14px 32px;
}

.btn--primary:hover {
  background-color: #c9382c;
}

.btn--primary:active {
  background-color: #b0302a;
}

.btn--sm {
  padding: 10px 24px;
  font-size: var(--text-sm);
  min-height: 40px;
}

.btn--link {
  background: none;
  color: var(--color-red-vermilion);
  padding: 8px 0;
  font-size: var(--text-sm);
  min-height: auto;
  border-radius: 0;
}

.btn--link:hover {
  color: #f0564a;
}

.btn--link-white {
  background: none;
  color: var(--color-white);
  padding: 12px 16px;
  font-weight: var(--font-medium);
  min-height: auto;
  border-radius: 0;
  border-bottom: 1px solid transparent;
}

.btn--link-white:hover {
  color: var(--color-red-vermilion);
  border-bottom-color: var(--color-red-vermilion);
}

/* ===================================
   Hero
   =================================== */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--space-8) var(--space-4);
  /* Hero is always visible — no fade-in */
  opacity: 1;
  transform: none;
}

.hero__logo {
  width: 160px;
  height: auto;
  margin-bottom: var(--space-6);
}

.hero__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.03em;
  max-width: 800px;
  margin-bottom: var(--space-3);
}

.hero__subtitle {
  font-size: var(--text-base);
  font-weight: var(--font-regular);
  line-height: var(--leading-relaxed);
  color: var(--color-gray);
  max-width: 640px;
  margin-bottom: var(--space-6);
}

.hero__ctas {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
}

/* ===================================
   The Shift
   =================================== */

.shift__narrative {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-gray);
  max-width: 640px;
  margin-bottom: var(--space-8);
}

/* Three Waves */
.waves {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.wave {
  flex: 1;
  padding: var(--space-3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base) ease;
}

.wave--active {
  border-color: var(--color-red-vermilion);
}

.wave__label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray);
  margin-bottom: var(--space-1);
}

.wave--active .wave__label {
  color: var(--color-red-vermilion);
}

.wave__title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  margin-bottom: 4px;
}

.wave__period {
  font-size: var(--text-sm);
  color: var(--color-gray);
  margin-bottom: var(--space-1);
}

.wave__desc {
  font-size: var(--text-sm);
  color: var(--color-gray);
  line-height: var(--leading-relaxed);
}

.wave--active .wave__desc {
  color: var(--color-white);
}

.wave__tag {
  display: inline-block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  color: var(--color-red-vermilion);
  font-style: italic;
}

/* Trust gap callout */
.callout {
  padding: var(--space-3) var(--space-4);
  border-left: 3px solid var(--color-red-vermilion);
  background: rgba(227, 66, 52, 0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.callout__text {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-white);
}

/* ===================================
   Pillars (What We Build)
   =================================== */

.pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.card {
  padding: var(--space-4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base) ease;
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.25);
}

.card__label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-red-vermilion);
  margin-bottom: var(--space-1);
}

.card__tagline {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  line-height: var(--leading-snug);
  margin-bottom: var(--space-2);
}

.card__copy {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-gray);
  margin-bottom: var(--space-3);
}

.card__proof {
  font-size: var(--text-xs);
  color: var(--color-gray);
  margin-bottom: var(--space-3);
}

.card__proof strong {
  color: var(--color-white);
}

/* Use cases list inside Pillar 3 */
.use-cases {
  list-style: none;
  margin-bottom: var(--space-3);
}

.use-cases__item {
  padding: 6px 0;
  padding-left: var(--space-2);
  position: relative;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-gray);
  transition: color var(--transition-fast) ease;
}

.use-cases__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  background: var(--color-red-vermilion);
  border-radius: 50%;
}

.use-cases__item:hover {
  color: var(--color-white);
}

.use-cases__item strong {
  color: var(--color-white);
  font-weight: var(--font-semibold);
}

/* ===================================
   Sweet Spot (Spectrum + Metrics)
   =================================== */

/* Velocity-Control Spectrum */
.spectrum {
  position: relative;
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
  margin: 0 auto var(--space-6);
}

.spectrum__grid {
  position: absolute;
  inset: 40px 0 0 40px;
  border-left: 1px solid rgba(255, 255, 255, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

/* Dashed grid lines for quadrant feel */
.spectrum__grid::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  border-left: 1px dashed rgba(255, 255, 255, 0.06);
}

.spectrum__grid::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  border-top: 1px dashed rgba(255, 255, 255, 0.06);
}

/* Axis labels */
.spectrum__axis-y {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray);
  white-space: nowrap;
}

.spectrum__axis-x {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray);
  white-space: nowrap;
}

/* Dots */
.spectrum__dot {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.spectrum__dot-circle {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gray);
}

.spectrum__dot--acf .spectrum__dot-circle {
  width: 18px;
  height: 18px;
  background: var(--color-red-vermilion);
  box-shadow: 0 0 20px rgba(227, 66, 52, 0.4);
}

.spectrum__dot-label {
  font-size: 11px;
  font-weight: var(--font-semibold);
  color: var(--color-gray);
  white-space: nowrap;
}

.spectrum__dot--acf .spectrum__dot-label {
  color: var(--color-white);
  font-size: var(--text-xs);
}

/* Position dots: grid area starts at 40px from left/top */
/* Traditional SDLC: high control, low velocity — top-left */
.spectrum__dot--sdlc {
  left: calc(40px + 20%);
  top: calc(40px + 15%);
}

/* Vibe Coding: low control, high velocity — bottom-right */
.spectrum__dot--vibe {
  left: calc(40px + 70%);
  bottom: calc(15%);
}

/* ACF: high control, high velocity — top-right */
.spectrum__dot--acf {
  right: calc(12%);
  top: calc(40px + 10%);
}

.spectrum__caption {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-gray);
  font-style: italic;
}

/* Metrics strip */
.metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.stat {
  text-align: center;
  padding: var(--space-3);
}

.stat__number {
  font-size: var(--text-2xl);
  font-weight: var(--font-extrabold);
  line-height: 1;
  color: var(--color-white);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.stat__label {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===================================
   Team
   =================================== */

.team {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.team-member {
  text-align: center;
}

.avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 2px solid var(--color-red-vermilion);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.team-member__name {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  margin-bottom: 2px;
}

.team-member__role {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-red-vermilion);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.team-member__bio {
  font-size: var(--text-sm);
  color: var(--color-gray);
  line-height: var(--leading-relaxed);
}

/* ===================================
   CTA Section
   =================================== */

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

.cta-section__logo {
  width: 48px;
  height: auto;
  margin: 0 auto var(--space-4);
  opacity: 0.6;
}

.cta-section__heading {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.cta-section__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===================================
   Footer
   =================================== */

.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-4) var(--space-4);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.footer__brand {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-white);
}

.footer__links {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
}

.footer__link {
  font-size: var(--text-xs);
  color: var(--color-gray);
  text-decoration: none;
  transition: color var(--transition-fast) ease;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__copyright {
  font-size: var(--text-xs);
  color: var(--color-gray);
  text-align: center;
}

/* ===================================
   Scroll margin for anchors
   =================================== */

[id] {
  scroll-margin-top: calc(var(--nav-height) + var(--space-2));
}

/* ===================================
   Responsive — Tablet (768px+)
   =================================== */

@media (min-width: 768px) {
  .section {
    padding: var(--space-12) 0;
  }

  .section__heading {
    font-size: var(--text-2xl);
  }

  .hero__title {
    font-size: var(--text-2xl);
  }

  .hero__logo {
    width: 120px;
  }

  .waves {
    flex-direction: row;
  }

  .metrics {
    grid-template-columns: repeat(4, 1fr);
  }

  .team {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
  }

  .footer__links {
    order: 0;
  }
}

/* ===================================
   Responsive — Desktop (1024px+)
   =================================== */

@media (min-width: 1024px) {
  .section {
    padding: var(--space-16) 0;
  }

  .section__heading {
    font-size: var(--text-3xl);
  }

  .hero__title {
    font-size: var(--text-3xl);
  }

  .hero__logo {
    width: 160px;
  }

  .pillars {
    grid-template-columns: repeat(3, 1fr);
  }

  .team {
    grid-template-columns: repeat(4, 1fr);
  }

  .stat__number {
    font-size: var(--text-3xl);
  }
}

/* ===================================
   Responsive — Mobile overrides
   =================================== */

@media (max-width: 767px) {
  .hero__logo {
    width: 80px;
  }

  .hero__title {
    font-size: var(--text-xl);
  }

  .hero__subtitle {
    font-size: var(--text-sm);
  }

  .section__heading {
    font-size: var(--text-lg);
  }

  .waves {
    flex-direction: column;
  }

  .spectrum {
    max-width: 320px;
  }

  .cta-section__heading {
    font-size: var(--text-lg);
  }

  .stat__number {
    font-size: var(--text-lg);
  }
}

/* ===================================
   Accessibility - Reduced Motion
   =================================== */

@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;
  }

  .section {
    opacity: 1;
    transform: none;
  }

  .nav {
    transition: none;
  }
}

/* ===================================
   Accessibility - Focus Management
   =================================== */

a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--color-red-vermilion);
  outline-offset: 4px;
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-red-vermilion);
  outline-offset: 4px;
}