:root {
  --brand-bg: #08131b;
  --brand-bg-deep: #0c1c24;
  --brand-surface: rgba(13, 25, 33, 0.8);
  --brand-surface-strong: rgba(14, 28, 37, 0.92);
  --brand-surface-soft: rgba(18, 35, 44, 0.62);
  --brand-border: rgba(140, 176, 187, 0.16);
  --brand-border-strong: rgba(171, 208, 221, 0.24);
  --brand-text: #eef6f7;
  --brand-text-soft: rgba(226, 238, 240, 0.84);
  --brand-text-muted: rgba(179, 203, 208, 0.7);
  --brand-accent: #67d8cb;
  --brand-accent-strong: #f3c36c;
  --brand-blue: #5d9fff;
  --brand-shadow: 0 26px 60px rgba(0, 0, 0, 0.22);
  --brand-radius-xl: 34px;
  --brand-radius-lg: 26px;
  --brand-radius-md: 18px;
  --brand-max-width: 1220px;
  --brand-font-body: "Be Vietnam Pro", "Segoe UI", sans-serif;
  --brand-font-display: "Sora", "Be Vietnam Pro", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.brand-page {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--brand-font-body);
  color: var(--brand-text);
  background:
    radial-gradient(circle at 10% 8%, rgba(103, 216, 203, 0.13), transparent 24%),
    radial-gradient(circle at 85% 10%, rgba(243, 195, 108, 0.12), transparent 22%),
    radial-gradient(circle at 50% 92%, rgba(93, 159, 255, 0.08), transparent 28%),
    linear-gradient(180deg, #08131b 0%, #0a1720 40%, #0d1d26 100%);
  overflow-x: hidden;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.brand-page::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.024) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: radial-gradient(circle at center, black, transparent 88%);
  opacity: 0.45;
}

a {
  color: inherit;
}

.brand-container {
  width: min(var(--brand-max-width), calc(100% - 40px));
  margin: 0 auto;
}

.page-content {
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1;
  flex: 1;
}

.brand-main {
  display: grid;
  flex: 1;
  gap: 28px;
  align-content: start;
  padding-bottom: 14px;
}

#page-loader.logo-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  background:
    radial-gradient(circle at center, rgba(93, 159, 255, 0.14), transparent 24%),
    linear-gradient(180deg, #08131b 0%, #0b1821 100%);
  transition: opacity 0.12s linear, visibility 0.12s linear;
}

#page-loader.hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.logo-loader-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 180px;
  min-height: 180px;
}

.ai-logo-core {
  position: relative;
  width: 78px;
  height: 78px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #2a7cff, var(--brand-accent));
  box-shadow: 0 0 22px rgba(42, 124, 255, 0.28);
  animation: brandCorePulse 1.4s ease-in-out infinite;
}

.ai-logo-core span {
  color: #fff;
  font-family: var(--brand-font-display);
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.ai-orbit {
  display: none;
}

.logo-loader-box h4 {
  margin: 14px 0 8px;
  font-family: var(--brand-font-display);
  font-size: 0.94rem;
  font-weight: 700;
}

.logo-loader-box p {
  margin: 0;
  color: var(--brand-text-muted);
  text-align: center;
  font-size: 0.8rem;
  max-width: 190px;
}

.hero-panel,
.overview-card,
.content-card,
.comparison-card,
.step-card,
.highlight-panel,
.cta-panel {
  border: 1px solid var(--brand-border);
  box-shadow: var(--brand-shadow);
  backdrop-filter: blur(14px);
}

.brand-hero {
  padding: 10px 0 4px;
}

.hero-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(310px, 0.92fr);
  gap: 26px;
  padding: 34px;
  border-radius: var(--brand-radius-xl);
  background:
    linear-gradient(155deg, rgba(14, 27, 35, 0.94), rgba(10, 21, 27, 0.9)),
    radial-gradient(circle at top right, rgba(243, 195, 108, 0.12), transparent 28%);
  overflow: hidden;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, #67d8cb 0%, #5d9fff 48%, #f3c36c 100%);
}

.section-kicker,
.hero-kicker,
.mini-kicker {
  margin: 0 0 14px;
  font-family: var(--brand-font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--brand-accent-strong);
}

.hero-title,
.section-title,
.hero-side h2,
.highlight-panel h3,
.cta-panel h2 {
  margin: 0;
  font-family: var(--brand-font-display);
  letter-spacing: -0.03em;
}

.hero-title {
  max-width: 12ch;
  font-size: clamp(1.7rem, 3.55vw, 2.9rem);
  line-height: 1.14;
}

.hero-title .accent {
  color: #8fcbff;
}

.hero-sub,
.section-sub,
.overview-card p,
.content-card p,
.comparison-card p,
.step-card p,
.highlight-panel p,
.cta-panel p,
.hero-points li,
.format-list li {
  color: var(--brand-text-soft);
}

.hero-sub {
  max-width: 62ch;
  margin: 20px 0 0;
  font-size: 0.98rem;
  line-height: 1.72;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn-brand-primary,
.btn-brand-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.96rem;
  font-weight: 700;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease,
    background-color 0.2s ease;
}

.btn-brand-primary {
  background: linear-gradient(135deg, #2a7cff, #5d9fff);
  color: #fff;
  box-shadow: 0 18px 34px rgba(42, 124, 255, 0.2);
}

.btn-brand-secondary {
  color: var(--brand-text);
  border: 1px solid var(--brand-border-strong);
  background: rgba(255, 255, 255, 0.04);
}

.btn-brand-primary:hover,
.btn-brand-secondary:hover {
  transform: translateY(-2px);
}

.btn-brand-primary:hover {
  background: linear-gradient(135deg, #2f82ff, #548de5);
  box-shadow: 0 20px 36px rgba(42, 124, 255, 0.24);
}

.btn-brand-secondary:hover {
  color: #fff;
  border-color: rgba(93, 159, 255, 0.34);
  background: rgba(25, 54, 76, 0.92);
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.hero-points li {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(140, 176, 187, 0.16);
  background: rgba(12, 24, 31, 0.62);
  font-size: 0.8rem;
  font-weight: 600;
}

.hero-side {
  display: grid;
  gap: 16px;
}

.highlight-panel {
  padding: 24px;
  border-radius: var(--brand-radius-lg);
  background:
    linear-gradient(180deg, rgba(15, 28, 36, 0.88), rgba(10, 21, 27, 0.82)),
    radial-gradient(circle at top right, rgba(93, 159, 255, 0.12), transparent 28%);
}

.highlight-panel h2,
.highlight-panel h3 {
  font-size: clamp(1.15rem, 2.1vw, 1.58rem);
  line-height: 1.24;
}

.highlight-panel p {
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.68;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.stat-card {
  padding: 16px 14px;
  border-radius: 18px;
  border: 1px solid rgba(140, 176, 187, 0.12);
  background: rgba(255, 255, 255, 0.035);
}

.stat-card strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--brand-font-display);
  font-size: clamp(0.96rem, 1.8vw, 1.24rem);
}

.stat-card span {
  color: var(--brand-text-muted);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.section {
  padding: 12px 0;
}

.section-header {
  max-width: 760px;
  margin: 0 auto 26px;
  text-align: center;
}

.section-title {
  font-size: clamp(1.6rem, 2.9vw, 2.38rem);
  line-height: 1.14;
}

.section-sub {
  margin: 14px auto 0;
  max-width: 64ch;
  font-size: 0.92rem;
  line-height: 1.72;
}

.overview-grid,
.content-grid,
.comparison-grid,
.steps-grid,
.format-grid {
  display: grid;
  gap: 16px;
}

.overview-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.content-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.comparison-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.steps-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.format-grid {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.92fr);
}

.overview-card,
.content-card,
.comparison-card,
.step-card {
  padding: 22px;
  border-radius: var(--brand-radius-lg);
  background: linear-gradient(180deg, rgba(15, 28, 36, 0.82), rgba(10, 20, 27, 0.76));
}

.overview-card strong,
.content-card h3,
.comparison-card h3,
.step-card h3 {
  display: block;
  margin: 10px 0 8px;
  font-family: var(--brand-font-display);
  font-size: 1rem;
}

.overview-card p,
.content-card p,
.comparison-card p,
.step-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.66;
}

.card-tag,
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid rgba(140, 176, 187, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--brand-text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.step-card {
  position: relative;
  padding-top: 72px;
}

.step-number {
  position: absolute;
  top: 22px;
  left: 22px;
  min-width: 42px;
  min-height: 42px;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(243, 195, 108, 0.18), rgba(243, 195, 108, 0.08));
  border-color: rgba(243, 195, 108, 0.26);
  color: #ffe1a2;
  font-family: var(--brand-font-display);
  font-size: 0.82rem;
}

.comparison-card ul,
.format-list {
  margin: 14px 0 0;
  padding-left: 18px;
}

.comparison-card li,
.format-list li {
  margin-bottom: 10px;
  font-size: 0.88rem;
  line-height: 1.62;
}

.split-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.96fr);
  gap: 18px;
}

.note-panel {
  padding: 24px;
  border-radius: var(--brand-radius-lg);
  border: 1px solid var(--brand-border);
  background: rgba(14, 27, 35, 0.76);
  box-shadow: var(--brand-shadow);
}

.note-panel h3 {
  margin: 0 0 10px;
  font-family: var(--brand-font-display);
  font-size: 1rem;
}

.note-panel p {
  margin: 0;
  color: var(--brand-text-soft);
  font-size: 0.88rem;
  line-height: 1.68;
}

.cta-panel {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 32px;
  border-radius: var(--brand-radius-xl);
  background:
    linear-gradient(145deg, rgba(15, 29, 38, 0.96), rgba(11, 23, 30, 0.92)),
    radial-gradient(circle at top left, rgba(103, 216, 203, 0.12), transparent 30%);
}

.cta-panel h2 {
  max-width: 16ch;
  font-size: clamp(1.5rem, 2.7vw, 2.2rem);
  line-height: 1.14;
}

.cta-panel p {
  max-width: 62ch;
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.7;
}

.site-footer {
  display: none;
}

.site-footer .footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px 24px;
  padding-top: 10px;
  border-top: 1px solid rgba(140, 176, 187, 0.12);
}

.footer-brand {
  margin-bottom: 6px;
  font-family: var(--brand-font-display);
  font-size: 0.94rem;
  font-weight: 700;
}

.footer-copy {
  margin: 0;
  max-width: 54ch;
  color: var(--brand-text-soft);
  font-size: 0.82rem;
  line-height: 1.62;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-end;
  align-self: start;
}

.footer-links a {
  color: var(--brand-text-muted);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 600;
}

.footer-links a:hover {
  color: #fff;
}

@keyframes brandCorePulse {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.08);
  }
}

@media (max-width: 1199.98px) {
  .hero-panel,
  .format-grid,
  .split-panel {
    grid-template-columns: 1fr;
  }

  .content-grid,
  .steps-grid {
    grid-template-columns: 1fr 1fr;
  }

  .overview-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .brand-container {
    width: min(var(--brand-max-width), calc(100% - 28px));
  }

  .brand-main {
    gap: 22px;
  }

  .hero-panel,
  .content-grid,
  .comparison-grid,
  .steps-grid,
  .overview-grid,
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .highlight-panel,
  .overview-card,
  .content-card,
  .comparison-card,
  .step-card,
  .note-panel,
  .cta-panel {
    padding: 22px;
  }

  .hero-title {
    max-width: none;
  }

  .cta-panel {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-footer .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: clamp(1.52rem, 7.9vw, 1.98rem);
  }

  .hero-sub,
  .section-sub,
  .highlight-panel p,
  .cta-panel p {
    font-size: 0.88rem;
  }

  .btn-brand-primary,
  .btn-brand-secondary {
    width: 100%;
  }
}

@media (max-width: 900px) {
  .hero-actions {
    width: 100%;
  }

  .hero-actions > * {
    flex: 1 1 calc(50% - 14px);
  }
}

@media (max-width: 640px) {
  .hero-actions {
    flex-direction: column;
  }

  .hero-actions > * {
    width: 100%;
    flex-basis: 100%;
  }
}

@media (max-width: 480px) {
  .brand-container {
    width: min(var(--brand-max-width), calc(100% - 22px));
  }

  .hero-panel,
  .highlight-panel,
  .overview-card,
  .content-card,
  .comparison-card,
  .step-card,
  .note-panel,
  .cta-panel {
    padding: 18px;
  }
}