/* ═══════════════════════════════════════════════════════════
   VivaVox Landing Page — Premium Dark Theme
   ═══════════════════════════════════════════════════════════ */

:root {
  --cyan: #00f2ff;
  --cyan-dim: rgba(0, 242, 255, 0.15);
  --green: #00ff9d;
  --purple: #bd00ff;
  --amber: #ffb800;
  --bg-primary: #050510;
  --bg-card: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.08);
  --text: #e0e0e0;
  --text-dim: #6b7280;
  --radius: 16px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ─── Animated Background ─────────────────────────────────── */
@keyframes grid-pan {
  from { background-position: 0 0; }
  to { background-position: 60px 60px; }
}

.bg-grid {
  position: fixed; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  animation: grid-pan 10s linear infinite;
}

@keyframes neural-float {
  0% { transform: translate(0, 0) scale(1); opacity: 0.15; }
  33% { transform: translate(30px, -50px) scale(1.1); opacity: 0.2; }
  66% { transform: translate(-20px, 20px) scale(0.9); opacity: 0.1; }
  100% { transform: translate(0, 0) scale(1); opacity: 0.15; }
}

.bg-glow {
  position: fixed; width: 800px; height: 800px; border-radius: 50%;
  filter: blur(160px); pointer-events: none; z-index: 0;
}
.bg-glow--cyan { 
  background: var(--cyan); top: -300px; right: -200px; 
  animation: neural-float 15s ease-in-out infinite; 
}
.bg-glow--purple { 
  background: var(--purple); bottom: -300px; left: -200px; 
  animation: neural-float 18s ease-in-out infinite reverse; 
}

/* ─── Navigation ──────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 48px;
  transition: all 0.4s ease;
}
.nav--scrolled {
  background: rgba(5, 5, 16, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 14px 48px;
}
.nav__brand { display: flex; align-items: center; gap: 10px; }
.nav__logo-img { width: 60px; height: 60px; object-fit: contain; border-radius: 12px; }
.nav__name { font-size: 14px; font-weight: 800; letter-spacing: 0.3em; color: white; }
.nav__links { display: flex; align-items: center; gap: 32px; }
.nav__link {
  color: var(--text-dim); font-size: 13px; font-weight: 500;
  text-decoration: none; letter-spacing: 0.05em;
  transition: color 0.3s ease;
}
.nav__link:hover { color: var(--cyan); }

/* ─── Hero ────────────────────────────────────────────────── */
.hero {
  position: relative; z-index: 1;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: space-between;
  padding: 120px 80px 80px;
  gap: 80px;
}
.hero__content { max-width: 640px; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--cyan-dim); border: 1px solid rgba(0,242,255,0.2);
  border-radius: 100px; padding: 6px 18px;
  font-size: 11px; font-weight: 700; letter-spacing: 0.15em;
  color: var(--cyan); text-transform: uppercase;
  margin-bottom: 32px;
  animation: fadeInUp 0.8s ease both;
}
.hero__badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}
.hero__title {
  font-size: clamp(64px, 10vw, 110px);
  font-weight: 800; line-height: 0.95;
  letter-spacing: -0.05em;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease 0.1s both;
}

/* ─── Antigravity Style CTA ──────────────────────────────── */
.nav__cta {
  background: white;
  color: black;
  padding: 10px 24px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid white;
}
.nav__cta:hover {
  background: transparent;
  color: white;
  transform: scale(1.05);
}

/* ─── Shimmer Effect ─────────────────────────────────────── */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.btn--shimmer {
  background: linear-gradient(90deg, rgba(0,242,255,0.1), rgba(189,0,255,0.2), rgba(0,242,255,0.1));
  background-size: 200% 100%;
  animation: shimmer 4s infinite linear;
}
.hero__title-line { display: block; color: white; }
.hero__title-line--accent {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__subtitle {
  font-size: 18px; color: var(--text-dim); line-height: 1.7;
  max-width: 500px; margin-bottom: 40px;
  animation: fadeInUp 0.8s ease 0.2s both;
}
.hero__subtitle em { color: var(--cyan); font-style: normal; font-weight: 600; }

/* ─── Download Button ─────────────────────────────────────── */
.hero__download { animation: fadeInUp 0.8s ease 0.3s both; }
.btn {
  display: inline-flex; align-items: center; gap: 16px;
  text-decoration: none; border-radius: 14px;
  font-family: var(--font);
  transition: all 0.3s ease;
  cursor: pointer;
}
.btn--primary {
  background: linear-gradient(135deg, rgba(0,242,255,0.15), rgba(189,0,255,0.1));
  border: 1px solid rgba(0,242,255,0.3);
  padding: 16px 32px;
  color: white;
}
.btn--primary:hover {
  background: linear-gradient(135deg, rgba(0,242,255,0.25), rgba(189,0,255,0.2));
  border-color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(0,242,255,0.2);
}
.btn__icon { font-size: 24px; }
.btn__content { display: flex; flex-direction: column; text-align: left; }
.btn__label { font-size: 16px; font-weight: 700; }
.btn__sub { font-size: 11px; color: var(--text-dim); margin-top: 2px; }
.btn__arrow {
  font-size: 20px; color: var(--cyan);
  animation: bounce-arrow 2s ease-in-out infinite;
}
@keyframes bounce-arrow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}
.hero__alt-downloads {
  display: flex; align-items: center; gap: 16px;
  margin-top: 16px; padding-left: 4px;
}
.hero__alt-label { font-size: 12px; color: var(--text-dim); }
.hero__alt-link {
  font-size: 13px; color: var(--text-dim);
  text-decoration: none; font-weight: 500;
  padding: 4px 10px; border-radius: 6px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  transition: all 0.3s;
}
.hero__alt-link:hover { 
  color: var(--cyan); 
  border-color: var(--cyan);
  background: var(--cyan-dim);
}

/* ─── Hero Stats ──────────────────────────────────────────── */
.hero__stats {
  display: flex; align-items: center; gap: 32px;
  margin-top: 48px; padding-top: 32px;
  border-top: 1px solid var(--border);
  animation: fadeInUp 0.8s ease 0.4s both;
}
.hero__stat-value {
  display: block; font-size: 18px; font-weight: 800;
  font-family: var(--mono); color: white;
}
.hero__stat-label {
  display: block; font-size: 11px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.1em; margin-top: 4px;
}
.hero__stat-divider { width: 1px; height: 36px; background: var(--border); }

/* ─── Hero Visual — Animated Orb ──────────────────────────── */
.hero__visual {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.hero__orb {
  position: relative; width: 360px; height: 360px;
  display: flex; align-items: center; justify-content: center;
}
.hero__orb-ring {
  position: absolute; border-radius: 50%;
  border: 1px solid; animation: spin-ring linear infinite;
}
.hero__orb-ring--1 {
  width: 100%; height: 100%;
  border-color: rgba(0,242,255,0.15);
  animation-duration: 20s;
}
.hero__orb-ring--2 {
  width: 75%; height: 75%;
  border-color: rgba(189,0,255,0.15);
  animation-duration: 15s; animation-direction: reverse;
  transform: rotate(45deg);
}
.hero__orb-ring--3 {
  width: 50%; height: 50%;
  border-color: rgba(0,255,157,0.1);
  animation-duration: 10s;
}
.hero__orb-core {
  width: 120px; height: 120px; border-radius: 50%;
  background: radial-gradient(circle, var(--cyan), transparent 70%);
  opacity: 0.4;
  animation: pulse-core 4s ease-in-out infinite;
}
@keyframes spin-ring { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes pulse-core {
  0%, 100% { opacity: 0.3; transform: scale(0.9); }
  50% { opacity: 0.6; transform: scale(1.1); }
}

/* ─── Sections ────────────────────────────────────────────── */
.section__header { text-align: center; margin-bottom: 64px; }
.section__tag {
  display: inline-block;
  font-size: 11px; font-weight: 700; letter-spacing: 0.3em;
  color: var(--cyan); text-transform: uppercase;
  margin-bottom: 12px;
}
.section__title { font-size: 42px; font-weight: 800; color: white; }

/* ─── Bento Grid Features ─────────────────────────────────── */
.features { position: relative; z-index: 1; padding: 120px 80px; }
.features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 220px;
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.feature-card--large { grid-column: span 2; grid-row: span 2; background: linear-gradient(135deg, rgba(0,242,255,0.05), transparent); }
.feature-card--wide { grid-column: span 2; }
.feature-card--tall { grid-row: span 2; }

.feature-card:hover {
  border-color: var(--cyan);
  background: rgba(255,255,255,0.06);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.feature-card__icon {
  width: 50px; height: 50px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}
.feature-card__icon--cyan { color: var(--cyan); box-shadow: 0 0 20px rgba(0,242,255,0.1); }
.feature-card__icon--green { color: var(--green); box-shadow: 0 0 20px rgba(0,255,157,0.1); }
.feature-card__icon--purple { color: var(--purple); box-shadow: 0 0 20px rgba(189,0,255,0.1); }
.feature-card__icon--amber { color: var(--amber); box-shadow: 0 0 20px rgba(255,184,0,0.1); }

.feature-card__title { 
  font-size: 22px; font-weight: 700; color: white; margin-bottom: 8px; 
  font-family: var(--mono);
}
.feature-card--large .feature-card__title { font-size: 32px; }
.feature-card__desc { font-size: 14px; color: var(--text-dim); line-height: 1.6; max-width: 90%; }

/* ─── How It Works ────────────────────────────────────────── */
.how-it-works { position: relative; z-index: 1; padding: 120px 80px; }
.steps { max-width: 700px; margin: 0 auto; }
.step {
  position: relative; display: flex; gap: 32px;
  padding-bottom: 48px;
  opacity: 0; transform: translateY(30px);
}
.step.revealed { opacity: 1; transform: translateY(0); }
.step__number {
  flex-shrink: 0; width: 56px; height: 56px;
  border-radius: 50%; border: 2px solid rgba(0,242,255,0.3);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-weight: 700; font-size: 16px;
  color: var(--cyan); background: rgba(0,242,255,0.05);
}
.step__title { font-size: 20px; font-weight: 700; color: white; margin-bottom: 4px; }
.step__desc { font-size: 14px; color: var(--text-dim); }
.step__line {
  position: absolute; left: 27px; top: 60px; bottom: 0;
  width: 2px; background: linear-gradient(to bottom, rgba(0,242,255,0.2), transparent);
}

/* ─── Requirements ────────────────────────────────────────── */
.requirements { position: relative; z-index: 1; padding: 120px 80px; }
.req-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px; max-width: 1000px; margin: 0 auto;
}
.req-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  opacity: 0; transform: translateY(30px);
  transition: all 0.4s ease;
}
.req-card.revealed { opacity: 1; transform: translateY(0); }
.req-card__os {
  display: flex; align-items: center; gap: 12px;
  font-size: 18px; font-weight: 700; color: white;
  margin-bottom: 20px; padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.req-card__os-icon { font-size: 28px; color: var(--cyan); }
.req-card__list { list-style: none; }
.req-card__list li {
  font-size: 13px; color: var(--text-dim);
  padding: 6px 0; padding-left: 20px;
  position: relative;
}
.req-card__list li::before {
  content: ''; position: absolute; left: 0; top: 50%;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan); opacity: 0.5;
  transform: translateY(-50%);
}

/* ─── Footer ──────────────────────────────────────────────── */
.footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--border);
  padding: 40px 80px; text-align: center;
}
.footer__copy { font-size: 13px; color: var(--text-dim); }

/* ─── Animations ──────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Transition for reveal ───────────────────────────────── */
.feature-card, .step, .req-card, .section__header {
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.section__header { opacity: 0; transform: translateY(20px); }
.section__header.revealed { opacity: 1; transform: translateY(0); }

/* ─── Comparison Section ───────────────────────────────────── */
.comparison { padding: 120px 80px; position: relative; z-index: 1; }
.comparison__grid {
  display: flex; align-items: center; justify-content: center;
  gap: 40px; max-width: 1000px; margin: 0 auto;
}
.comparison__card {
  flex: 1; background: var(--bg-card); border: 1px solid var(--border);
  padding: 48px; border-radius: 24px; transition: all 0.4s ease;
}
.comparison__card--cloud { border-left: 4px solid #ff4b4b; }
.comparison__card--viva { border-left: 4px solid var(--cyan); background: rgba(0, 242, 255, 0.02); }

.comparison__card-title { font-size: 20px; font-weight: 700; margin-bottom: 24px; color: white; }
.comparison__list { list-style: none; }
.comparison__item {
  font-size: 15px; margin-bottom: 16px; padding-left: 28px; position: relative;
  color: var(--text-dim);
}
.comparison__item::before {
  content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  font-size: 14px; font-weight: bold;
}
.comparison__item--bad::before { content: '✕'; color: #ff4b4b; }
.comparison__item--good::before { content: '✓'; color: var(--cyan); }
.comparison__item--good { color: white; }

.comparison__divider {
  font-family: var(--mono); font-weight: 800; font-size: 24px;
  color: var(--text-dim); opacity: 0.3;
}

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero { flex-direction: column; padding: 120px 40px 60px; text-align: center; }
  .hero__content { max-width: 100%; }
  .hero__subtitle { max-width: 100%; }
  .hero__stats { justify-content: center; }
  .hero__visual { order: -1; }
  .hero__orb { width: 240px; height: 240px; }
}
@media (max-width: 768px) {
  .nav { padding: 16px 24px; }
  .nav__links { gap: 16px; }
  .hero { padding: 100px 24px 40px; }
  .hero__title { font-size: 56px; }
  .features, .how-it-works, .requirements, .comparison { padding: 80px 24px; }
  .hero__stats { flex-wrap: wrap; gap: 20px; }
  .comparison__grid { flex-direction: column; }
  .comparison__divider { margin: 20px 0; transform: rotate(90deg); }
  .hero__stat-divider { display: none; }
}

/* ─── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: rgba(0,0,0,0.3); }
::-webkit-scrollbar-thumb { background: var(--cyan); border-radius: 10px; }