/* ═══════════════════════════════════════════════
   LUMIOV — Website Stylesheet
   Dark theme inspired by VS Code Dark+
   ═══════════════════════════════════════════════ */

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

:root {
  /* Colors */
  --bg-deep: #0a0a0f;
  --bg-primary: #0d1117;
  --bg-surface: #161b22;
  --bg-surface-hover: #1c2129;
  --bg-elevated: #21262d;
  --bg-card: rgba(22, 27, 34, 0.7);
  --border: #30363d;
  --border-light: rgba(48, 54, 61, 0.5);

  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-tertiary: #484f58;
  --text-link: #58a6ff;

  --accent-blue: #58a6ff;
  --accent-purple: #bc8cff;
  --accent-green: #3fb950;
  --accent-red: #f85149;
  --accent-amber: #d29922;
  --accent-cyan: #39d2c0;

  --gradient-primary: linear-gradient(135deg, #58a6ff, #bc8cff);
  --gradient-purple: linear-gradient(135deg, #bc8cff, #f778ba);
  --gradient-glow: radial-gradient(
    600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(88, 166, 255, 0.06),
    transparent 40%
  );

  /* Sizing */
  --max-width: 1200px;
  --nav-height: 64px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family:
    'Inter',
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

a {
  color: inherit;
  text-decoration: none;
}

code {
  font-family: 'SF Mono', 'Fira Code', monospace;
  background: rgba(88, 166, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--accent-blue);
}

/* ─── Utility ─── */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-purple {
  background: var(--gradient-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 0 20px rgba(88, 166, 255, 0.2);
}

.btn--primary:hover {
  box-shadow: 0 0 30px rgba(88, 166, 255, 0.35);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn--ghost:hover:not(:disabled) {
  border-color: var(--accent-blue);
  color: var(--text-primary);
}

.btn--ghost:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 14px 28px;
  font-size: 1rem;
}

/* ═══════════════════ ANNOUNCEMENT ═══════════════════ */
.announcement {
  background: linear-gradient(90deg, rgba(88, 166, 255, 0.1), rgba(188, 140, 255, 0.1));
  border-bottom: 1px solid var(--border-light);
  padding: 10px 0;
  font-size: 0.85rem;
}

.announcement__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.announcement__inner p {
  color: var(--text-secondary);
}

.announcement__inner a {
  color: var(--accent-blue);
  font-weight: 500;
  transition: color 0.2s;
}

.announcement__inner a:hover {
  color: var(--accent-purple);
}

/* ═══════════════════ NAV ═══════════════════ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  height: var(--nav-height);
}

.nav__inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 32px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.nav__logo-img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav__links a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s var(--ease);
}

.nav__links a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.nav__actions {
  flex-shrink: 0;
}

.nav__mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav__mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ═══════════════════ HERO ═══════════════════ */
.hero {
  position: relative;
  padding: 100px 0 60px;
  overflow: hidden;
}

.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(48, 54, 61, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(48, 54, 61, 0.15) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(
    ellipse 80% 60% at 50% 0%,
    #000 30%,
    transparent 100%
  );
}

.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
}

.hero__glow--1 {
  width: 600px;
  height: 600px;
  background: rgba(88, 166, 255, 0.08);
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
}

.hero__glow--2 {
  width: 400px;
  height: 400px;
  background: rgba(188, 140, 255, 0.06);
  top: -100px;
  right: -100px;
}

.hero__inner {
  position: relative;
  text-align: center;
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-blue);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  max-width: 800px;
  margin: 0 auto 24px;
}

.hero__subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero__cta {
  margin-bottom: 60px;
}

/* ─── App Preview ─── */
.hero__preview {
  max-width: 900px;
  margin: 0 auto;
  perspective: 1200px;
}

.hero__preview-window {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  overflow: hidden;
  box-shadow:
    0 4px 60px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.03) inset;
  animation: previewFloat 6s ease-in-out infinite;
}

@keyframes previewFloat {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

.preview-titlebar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}

.preview-titlebar__dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot--red {
  background: #f85149;
}
.dot--yellow {
  background: #d29922;
}
.dot--green {
  background: #3fb950;
}

.preview-titlebar__title {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.preview-content {
  display: flex;
  min-height: 280px;
}

.preview-sidebar {
  width: 160px;
  background: rgba(13, 17, 23, 0.6);
  border-right: 1px solid var(--border);
  padding: 12px 8px;
  flex-shrink: 0;
}

.preview-sidebar__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: default;
  transition: background 0.2s;
}

.preview-sidebar__item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.preview-sidebar__item--active {
  background: rgba(88, 166, 255, 0.1);
  color: var(--accent-blue);
}

.preview-main {
  flex: 1;
  padding: 16px;
}

.preview-main__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.preview-main__title {
  font-size: 1rem;
  font-weight: 600;
}

.preview-main__namespace {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  background: rgba(48, 54, 61, 0.5);
  padding: 4px 10px;
  border-radius: 20px;
}

.preview-table__header,
.preview-table__row {
  display: grid;
  grid-template-columns: 2fr 1fr 0.7fr 0.7fr 0.5fr;
  gap: 12px;
  padding: 10px 12px;
  align-items: center;
  font-size: 0.8rem;
}

.preview-table__header {
  color: var(--text-tertiary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}

.preview-table__row {
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: background 0.2s;
}

.preview-table__row:hover {
  background: rgba(255, 255, 255, 0.02);
}

.preview-table__row--warn {
  background: rgba(248, 81, 73, 0.04);
  border-left: 2px solid var(--accent-red);
}

.status {
  font-weight: 600;
  font-size: 0.75rem;
}

.status--running {
  color: var(--accent-green);
}
.status--error {
  color: var(--accent-red);
}

.ai-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-size: 0.7rem;
  background: rgba(63, 185, 80, 0.1);
  color: var(--accent-green);
}

.ai-badge--active {
  background: rgba(188, 140, 255, 0.15);
  color: var(--accent-purple);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(188, 140, 255, 0.3);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(188, 140, 255, 0);
  }
}

/* ═══════════════════ SECTIONS ═══════════════════ */
.section {
  padding: 100px 0;
}

.section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section__tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-blue);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.section__tag--purple {
  color: var(--accent-purple);
}

.section__title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ─── Features ─── */
.features {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.feature-row:last-child {
  margin-bottom: 0;
}

.feature-row__content {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  transition: all 0.3s var(--ease);
}

.feature-row__content:hover {
  border-color: var(--border);
  background: var(--bg-surface-hover);
  transform: translateY(-2px);
}

.feature-row__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-row__icon svg {
  width: 24px;
  height: 24px;
}

.feature-row__icon--blue {
  background: rgba(88, 166, 255, 0.1);
  color: var(--accent-blue);
}

.feature-row__icon--purple {
  background: rgba(188, 140, 255, 0.1);
  color: var(--accent-purple);
}

.feature-row__icon--green {
  background: rgba(63, 185, 80, 0.1);
  color: var(--accent-green);
}

.feature-row__icon--amber {
  background: rgba(210, 153, 34, 0.1);
  color: var(--accent-amber);
}

.feature-row__icon--cyan {
  background: rgba(57, 210, 192, 0.1);
  color: var(--accent-cyan);
}

.feature-row__icon--red {
  background: rgba(248, 81, 73, 0.1);
  color: var(--accent-red);
}

.feature-row__content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-row__content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ═══════════════ AI SECTION ═══════════════ */
.ai-section {
  position: relative;
  overflow: hidden;
}

.ai-section__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.ai-section__text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 28px;
}

.ai-section__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ai-section__list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.check-icon {
  width: 20px;
  height: 20px;
  color: var(--accent-green);
  flex-shrink: 0;
}

/* ─── AI Card ─── */
.ai-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

.ai-card__header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}

.ai-card__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.ai-card__dot--red {
  background: #f85149;
}
.ai-card__dot--yellow {
  background: #d29922;
}
.ai-card__dot--green {
  background: #3fb950;
}

.ai-card__title {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-left: 8px;
}

.ai-card__body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ai-card__section {
  padding: 14px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.2);
  border-left: 3px solid transparent;
}

.ai-card__label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.ai-card__label--red {
  color: var(--accent-red);
}

.ai-card__label--red + .ai-card__text {
  border-color: var(--accent-red);
}

.ai-card__section:nth-child(1) {
  border-left-color: var(--accent-red);
}

.ai-card__section:nth-child(2) {
  border-left-color: var(--accent-blue);
}

.ai-card__section:nth-child(3) {
  border-left-color: var(--accent-green);
}

.ai-card__label--blue {
  color: var(--accent-blue);
}
.ai-card__label--green {
  color: var(--accent-green);
}

.ai-card__text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ═══════════════ DEMO SECTION ═══════════════ */
.demo-section {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.demo-section__player {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.demo-section__placeholder {
  aspect-ratio: 16 / 9;
  background: var(--bg-surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.demo-section__play-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s var(--ease);
  box-shadow: 0 0 30px rgba(88, 166, 255, 0.2);
}

.demo-section__play-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 0 40px rgba(88, 166, 255, 0.35);
}

.demo-section__play-btn svg {
  width: 28px;
  height: 28px;
  margin-left: 3px;
}

.demo-section__video-label {
  color: var(--text-tertiary);
  font-size: 0.9rem;
}

/* ═══════════════ TECH SECTION ═══════════════ */
.tech-section__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 700px;
  margin: 0 auto;
}

.tech-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all 0.3s var(--ease);
}

.tech-card:hover {
  border-color: var(--border);
  transform: translateY(-2px);
}

.tech-card__icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.tech-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.tech-card p {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* ═══════════════ DOWNLOAD SECTION ═══════════════ */
.download-section__card {
  max-width: 700px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  overflow: hidden;
}

.download-section__platforms {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.download-platform {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  border-bottom: 2px solid transparent;
  user-select: none;
}

.download-platform svg {
  width: 20px;
  height: 20px;
}

.download-platform:hover {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.02);
}

.download-platform--active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
  background: rgba(88, 166, 255, 0.04);
}

.download-section__content {
  padding: 40px;
}

.download-info {
  display: none;
}

.download-info--active {
  display: block;
}

.download-info__main h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.download-info__main p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* ═══════════════ FOOTER ═══════════════ */
.footer {
  padding: 60px 0 40px;
  border-top: 1px solid var(--border-light);
}

.footer__top {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  margin-bottom: 40px;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer__brand span {
  font-weight: 700;
  font-size: 1.15rem;
}

.footer__logo {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  margin-bottom: 8px;
}

.footer__tagline {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  max-width: 200px;
}

.footer__columns {
  display: flex;
  gap: 56px;
}

.footer__column {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__column h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.footer__column a {
  color: var(--text-tertiary);
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer__column a:hover {
  color: var(--text-primary);
}

.footer__bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* ═══════════════════ ANIMATIONS ═══════════════════ */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.6s var(--ease),
    transform 0.6s var(--ease);
}

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

/* ═══════════════════ RESPONSIVE ═══════════════════ */
@media (max-width: 768px) {
  .nav__links,
  .nav__actions {
    display: none;
  }

  .nav__mobile-toggle {
    display: flex;
    margin-left: auto;
  }

  .nav__links.nav__links--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    gap: 0;
  }

  .hero {
    padding: 60px 0 40px;
  }

  .hero__title {
    font-size: 2.2rem;
  }

  .feature-row {
    grid-template-columns: 1fr;
  }

  .ai-section__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .preview-sidebar {
    display: none;
  }

  .preview-table__header,
  .preview-table__row {
    grid-template-columns: 2fr 1fr 0.7fr 0.5fr;
  }

  .preview-table__header span:nth-child(3),
  .preview-table__row span:nth-child(3) {
    display: none;
  }

  .download-section__content {
    padding: 24px;
  }

  .footer__top {
    flex-direction: column;
    gap: 32px;
  }

  .footer__columns {
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .tech-section__grid {
    grid-template-columns: 1fr 1fr;
  }

  .download-platform span {
    display: none;
  }

  .hero__cta .btn--lg {
    padding: 12px 20px;
    font-size: 0.9rem;
  }
}