/* =========================================================================
   SMILE AI — STYLESHEET
   Design tokens live in :root as CSS variables. The [data-theme="light"]
   attribute (toggled via JS) swaps the palette for a light variant.
   ========================================================================= */

:root {
  --color-bg: #05070d;
  --color-bg-alt: #080b15;
  --color-surface: rgba(255, 255, 255, 0.045);
  --color-surface-strong: rgba(255, 255, 255, 0.07);
  --color-border: rgba(255, 255, 255, 0.09);
  --color-border-strong: rgba(255, 255, 255, 0.16);

  --color-text: #e9edf6;
  --color-text-dim: #9aa5bd;
  --color-text-faint: #626c85;

  --color-blue: #00d4ff;
  --color-green: #39ff88;
  --color-purple: #8b7bff;
  --color-pink: #ff5fd1;
  --color-gold: #ffc857;

  --gradient-primary: linear-gradient(135deg, var(--color-blue), var(--color-green));
  --gradient-bg: radial-gradient(circle at 20% 20%, rgba(0, 212, 255, 0.14), transparent 45%),
                 radial-gradient(circle at 80% 30%, rgba(57, 255, 136, 0.12), transparent 45%),
                 radial-gradient(circle at 50% 90%, rgba(139, 123, 255, 0.1), transparent 50%);

  --shadow-glow-blue: 0 0 24px rgba(0, 212, 255, 0.35);
  --shadow-glow-green: 0 0 24px rgba(57, 255, 136, 0.3);
  --shadow-card: 0 20px 45px rgba(0, 0, 0, 0.35);

  --font-display: "Chakra Petch", "Segoe UI", sans-serif;
  --font-body: "Sora", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --container-width: 1180px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --nav-height: 84px;
  --transition-fast: 0.2s ease;
  --transition-mid: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="light"] {
  --color-bg: #f4f7fb;
  --color-bg-alt: #eaeff6;
  --color-surface: rgba(20, 30, 50, 0.045);
  --color-surface-strong: rgba(20, 30, 50, 0.07);
  --color-border: rgba(20, 30, 50, 0.1);
  --color-border-strong: rgba(20, 30, 50, 0.18);

  --color-text: #101423;
  --color-text-dim: #4a5266;
  --color-text-faint: #7b8296;

  --shadow-card: 0 20px 45px rgba(20, 30, 50, 0.12);
}

/* =========================================================================
   RESET & BASE
   ========================================================================= */

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

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height); overflow-x: hidden; max-width: 100%; }

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition-mid), color var(--transition-mid);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; color: inherit; background: none; border: none; outline: none; }
ul { list-style: none; }
::selection { background: var(--color-green); color: #05070d; }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--color-blue), var(--color-green)); border-radius: 10px; }

.container { width: 100%; max-width: var(--container-width); margin-inline: auto; padding-inline: 24px; }
.container--narrow { max-width: 780px; }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* =========================================================================
   AMBIENT BACKGROUND LAYERS
   ========================================================================= */

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: var(--gradient-bg);
  background-size: 200% 200%;
  animation: driftGradient 22s ease-in-out infinite;
  z-index: -2;
  pointer-events: none;
}

@keyframes driftGradient {
  0% { background-position: 0% 0%; }
  50% { background-position: 100% 100%; }
  100% { background-position: 0% 0%; }
}

.neural-canvas { position: fixed; inset: 0; z-index: -1; opacity: 0.55; pointer-events: none; }

.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 420px; height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1), transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}

.scroll-progress {
  position: fixed; top: 0; left: 0;
  height: 3px; width: 0%;
  background: var(--gradient-primary);
  box-shadow: var(--shadow-glow-blue);
  z-index: 1200;
  transition: width 0.1s linear;
}

/* =========================================================================
   TYPOGRAPHY UTILITIES
   ========================================================================= */

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: 0.01em; line-height: 1.15; }

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

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.78rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--color-green); margin-bottom: 14px;
}

.eyebrow--center { justify-content: center; width: 100%; }

.eyebrow__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 10px var(--color-green);
  animation: pulseDot 1.8s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.badge-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px;
  border-radius: 100px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
  backdrop-filter: blur(10px);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-gold);
  margin-bottom: 24px;
}

.badge-pill__star { width: 15px; height: 15px; }

/* =========================================================================
   BUTTONS
   ========================================================================= */

.btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 30px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem; letter-spacing: 0.02em;
  border-radius: 100px;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.btn svg { width: 18px; height: 18px; transition: transform var(--transition-fast); }
.btn:disabled { opacity: 0.7; cursor: wait; transform: none !important; }

.btn--primary { background: var(--gradient-primary); color: #05070d; box-shadow: 0 10px 30px rgba(0, 212, 255, 0.25); }
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(57, 255, 136, 0.35); }
.btn--primary:hover svg { transform: translateX(3px); }

.btn--outline {
  border: 1.5px solid var(--color-border-strong);
  color: var(--color-text);
  background: var(--color-surface);
  backdrop-filter: blur(10px);
}
.btn--outline:hover { border-color: var(--color-blue); color: var(--color-blue); transform: translateY(-3px); box-shadow: var(--shadow-glow-blue); }

.btn--ghost { color: var(--color-text-dim); padding: 10px 20px; border: 1px solid var(--color-border); }
.btn--ghost:hover { color: var(--color-text); border-color: var(--color-border-strong); }

.btn--small { font-size: 0.85rem; padding: 11px 22px; }
.btn--full { width: 100%; }

.ripple {
  position: absolute; border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: scale(0);
  animation: rippleAnim 0.6s ease-out;
  pointer-events: none;
}

@keyframes rippleAnim { to { transform: scale(3); opacity: 0; } }

/* =========================================================================
   NAVIGATION
   ========================================================================= */

.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--transition-mid), border-color var(--transition-mid);
}

.navbar.is-scrolled {
  background: color-mix(in srgb, var(--color-bg) 78%, transparent);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--color-border);
}

.navbar__inner {
  max-width: var(--container-width);
  margin-inline: auto;
  height: 100%;
  padding-inline: 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}

.navbar__logo { display: flex; align-items: center; gap: 12px; }

.navbar__logo-mark {
  width: 42px; height: 42px;
  border-radius: 50%;
  object-fit: cover;
  border: 1.5px solid rgba(0, 212, 255, 0.5);
  box-shadow: 0 0 14px rgba(0, 212, 255, 0.4);
  background: #060a12;
  flex-shrink: 0;
}

.navbar__logo-text-wrap { display: flex; flex-direction: column; line-height: 1.15; }

.navbar__logo-text { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: 0.03em; }
.navbar__logo-accent { color: var(--color-green); }

.navbar__logo-tagline {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.navbar__links { display: flex; align-items: center; gap: 28px; }

.nav-link {
  position: relative;
  font-size: 0.9rem; font-weight: 500;
  color: var(--color-text-dim);
  padding: 6px 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  width: 0%; height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover, .nav-link.is-active { color: var(--color-text); }
.nav-link:hover::after, .nav-link.is-active::after { width: 100%; }

.navbar__actions { display: flex; align-items: center; gap: 14px; }

.theme-toggle {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-dim);
  transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle:hover { color: var(--color-green); border-color: var(--color-green); transform: rotate(20deg); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

.hamburger { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 38px; height: 38px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--color-text); border-radius: 2px; transition: transform var(--transition-fast), opacity var(--transition-fast); margin-inline: auto; }
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  position: fixed; top: var(--nav-height); left: 0; right: 0;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border);
  display: flex; flex-direction: column;
  padding: 10px 24px 24px;
  max-height: 0; overflow: hidden; opacity: 0;
  transition: max-height var(--transition-mid), opacity var(--transition-fast);
  z-index: 999;
}

.mobile-nav.is-open { max-height: 480px; opacity: 1; overflow-y: auto; }

.mobile-nav__link { padding: 14px 4px; font-size: 1.02rem; font-weight: 500; border-bottom: 1px solid var(--color-border); color: var(--color-text-dim); transition: color var(--transition-fast); }
.mobile-nav__link:hover { color: var(--color-green); }

/* =========================================================================
   HERO
   ========================================================================= */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex; flex-wrap: wrap; align-items: center; gap: 40px;
  padding: calc(var(--nav-height) + 50px) 24px 90px;
  max-width: var(--container-width);
  margin-inline: auto;
}

.hero__glow { position: absolute; width: 480px; height: 480px; border-radius: 50%; filter: blur(110px); z-index: -1; opacity: 0.5; }
.hero__glow--blue { background: var(--color-blue); top: -100px; right: 0; }
.hero__glow--green { background: var(--color-green); bottom: -120px; left: -80px; }

.hero__content { flex: 1 1 460px; max-width: 600px; padding-inline: 0; }

.hero__title {
  font-size: clamp(3rem, 6.5vw, 5.2rem);
  letter-spacing: 0.06em;
  margin-bottom: 14px;
  background: linear-gradient(135deg, #ffffff, #b9c3d6);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.hero__acronym {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  font-weight: 600;
  color: var(--color-text-dim);
  margin-bottom: 22px;
}

.acronym-break { display: none; }

.hero__subtitle { font-size: 1.1rem; color: var(--color-text-dim); max-width: 540px; margin-bottom: 34px; }

.hero__cta { display: flex; flex-wrap: wrap; gap: 16px; }

/* ---- Hero robot stage ---- */

.hero__robot-stage {
  position: relative;
  flex: 1 1 380px;
  max-width: 460px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 480px;
}

.hero__robot-glow {
  position: absolute;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.35), transparent 70%);
  filter: blur(20px);
  animation: robotGlowPulse 4s ease-in-out infinite;
}

@keyframes robotGlowPulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

.hero__robot-img {
  position: relative;
  z-index: 2;
  width: min(300px, 78%);
  animation: robotFloat 5s ease-in-out infinite;
  filter: drop-shadow(0 20px 40px rgba(0, 212, 255, 0.35));
}

@keyframes robotFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

.hero__ring {
  position: absolute;
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 50%;
  z-index: 1;
}

.hero__ring--1 { width: 260px; height: 90px; bottom: 60px; animation: ringSpin 10s linear infinite; }
.hero__ring--2 { width: 340px; height: 120px; bottom: 40px; border-color: rgba(57, 255, 136, 0.18); animation: ringSpin 14s linear infinite reverse; }

@keyframes ringSpin { from { transform: rotateX(70deg) rotate(0deg); } to { transform: rotateX(70deg) rotate(360deg); } }

.capability-chip {
  position: absolute;
  display: flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 500;
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border-strong);
  backdrop-filter: blur(14px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  animation: floatChip 5s ease-in-out infinite;
  white-space: nowrap;
  z-index: 3;
}

.capability-chip__icon { font-size: 0.9rem; }

.capability-chip--1 { top: 6%; left: -4%; animation-delay: 0s; }
.capability-chip--2 { top: 32%; left: -14%; animation-delay: 0.6s; }
.capability-chip--3 { bottom: 8%; left: -2%; animation-delay: 1.2s; }
.capability-chip--4 { top: 6%; right: -6%; animation-delay: 1.8s; }
.capability-chip--5 { top: 32%; right: -16%; animation-delay: 2.4s; }
.capability-chip--6 { bottom: 8%; right: -4%; animation-delay: 3s; }

@keyframes floatChip {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.scroll-cue {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 2px solid var(--color-border-strong);
  border-radius: 20px;
  display: flex; justify-content: center; padding-top: 8px;
}

.scroll-cue span { width: 4px; height: 8px; border-radius: 4px; background: var(--color-green); animation: scrollCue 1.6s infinite ease-in-out; }

@keyframes scrollCue {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(14px); }
}

/* =========================================================================
   SECTIONS (shared)
   ========================================================================= */

.section { padding: 100px 0; position: relative; }
.section--alt { background: var(--color-bg-alt); }
.section__head { text-align: center; max-width: 620px; margin: 0 auto 52px; }
.section__title { font-size: clamp(1.9rem, 3.6vw, 2.6rem); margin-bottom: 14px; }
.section__subtitle { color: var(--color-text-dim); font-size: 1.03rem; }

/* =========================================================================
   GLASS CARD BASE
   ========================================================================= */

.glass-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px) saturate(130%);
  box-shadow: var(--shadow-card);
}

.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot--red { background: #ff5f57; }
.dot--yellow { background: #febc2e; }
.dot--green { background: #28c840; }

/* =========================================================================
   GRIDS & FEATURE CARDS (accent-colored per card via --accent var)
   ========================================================================= */

.grid { display: grid; gap: 24px; }
.grid--features { grid-template-columns: repeat(4, 1fr); }
.grid--stats { grid-template-columns: repeat(5, 1fr); }
.grid--pricing { grid-template-columns: repeat(3, 1fr); gap: 28px; }

.feature-card {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(16px);
  transition: transform var(--transition-mid), border-color var(--transition-fast), box-shadow var(--transition-mid);
  overflow: hidden;
  --accent: var(--color-blue);
}

.feature-card::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 0%, color-mix(in srgb, var(--accent) 25%, transparent), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.feature-card:hover { transform: translateY(-8px); border-color: color-mix(in srgb, var(--accent) 50%, var(--color-border-strong)); box-shadow: 0 20px 40px color-mix(in srgb, var(--accent) 20%, transparent); }
.feature-card:hover::before { opacity: 1; }

.card-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--color-border));
  color: var(--accent);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.feature-card:hover .card-icon { transform: scale(1.1) rotate(-6deg); box-shadow: 0 0 22px color-mix(in srgb, var(--accent) 55%, transparent); }

.feature-card h3 { font-size: 1.08rem; margin-bottom: 10px; }
.feature-card p { color: var(--color-text-dim); font-size: 0.92rem; }

/* =========================================================================
   SKILLS MATRIX
   ========================================================================= */

.skills-groups { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.skill-group {
  padding: 28px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(14px);
}

.skill-group h3 {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.02rem;
  margin-bottom: 18px;
  color: var(--color-text);
}

.skill-group h3 .skill-group__icon { font-size: 1.2rem; }

.skill-tags { display: flex; flex-wrap: wrap; gap: 10px; }

.skill-tag {
  padding: 8px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--color-text-dim);
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border);
  transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.skill-tag:hover { color: var(--color-green); border-color: var(--color-green); transform: translateY(-2px); }

/* =========================================================================
   PERSONALITY CAROUSEL
   ========================================================================= */

.carousel { position: relative; display: flex; align-items: center; gap: 14px; min-width: 0; }

.carousel__track {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  padding: 6px 2px 20px;
  flex: 1;
  min-width: 0;
  scrollbar-width: none;
}

.carousel__track::-webkit-scrollbar { display: none; }

.carousel__arrow {
  flex-shrink: 0;
  width: 46px; height: 46px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.carousel__arrow svg { width: 18px; height: 18px; }
.carousel__arrow:hover { border-color: var(--color-green); color: var(--color-green); transform: scale(1.08); }

.personality-card {
  position: relative;
  flex: 0 0 220px;
  scroll-snap-align: start;
  padding: 28px 22px;
  text-align: center;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(16px);
  transition: transform var(--transition-mid), border-color var(--transition-fast), box-shadow var(--transition-mid);
  --accent: var(--color-blue);
}

.personality-card:hover { transform: translateY(-8px); border-color: color-mix(in srgb, var(--accent) 50%, var(--color-border-strong)); box-shadow: 0 20px 40px color-mix(in srgb, var(--accent) 20%, transparent); }

.personality-card__avatar {
  width: 74px; height: 74px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--accent) 45%, var(--color-border));
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.personality-card:hover .personality-card__avatar { transform: scale(1.1); box-shadow: 0 0 24px color-mix(in srgb, var(--accent) 55%, transparent); }

.personality-card h3 { font-size: 1.05rem; margin-bottom: 8px; color: var(--accent); }
.personality-card p { color: var(--color-text-dim); font-size: 0.86rem; margin-bottom: 10px; }

.personality-card__trait {
  font-size: 0.74rem;
  font-family: var(--font-mono);
  color: var(--color-text-faint);
  border-top: 1px solid var(--color-border);
  padding-top: 10px;
}

/* =========================================================================
   INTERACTIVE DEMO CHAT
   ========================================================================= */

.demo-shell { max-width: 780px; margin-inline: auto; overflow: hidden; }

.demo-shell__header { display: flex; align-items: center; gap: 8px; padding: 16px 20px; border-bottom: 1px solid var(--color-border); }
.demo-shell__title { margin-left: 8px; font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-text-faint); }
.demo-shell__status { margin-left: auto; display: flex; align-items: center; gap: 6px; font-size: 0.78rem; color: var(--color-text-faint); }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--color-green); box-shadow: 0 0 8px var(--color-green); }

.demo-chat { height: 380px; overflow-y: auto; padding: 24px; display: flex; flex-direction: column; gap: 18px; }

.chat-msg { display: flex; gap: 12px; align-items: flex-start; animation: msgIn 0.35s ease both; }

@keyframes msgIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.chat-msg--user { flex-direction: row-reverse; }

.chat-msg__avatar {
  width: 34px; height: 34px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border);
  font-size: 1rem;
}

.chat-msg--user .chat-msg__avatar { background: linear-gradient(135deg, var(--color-blue), var(--color-green)); }

.chat-msg__bubble {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  max-width: 75%;
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border);
  line-height: 1.55;
}

.chat-msg--user .chat-msg__bubble { background: linear-gradient(135deg, rgba(0, 212, 255, 0.18), rgba(57, 255, 136, 0.14)); border-color: rgba(0, 212, 255, 0.3); }

.chat-msg--typing .chat-msg__bubble { display: flex; gap: 5px; padding: 16px; }
.chat-msg--typing .chat-msg__bubble span { width: 6px; height: 6px; border-radius: 50%; background: var(--color-green); animation: typingBounce 1.2s infinite ease-in-out; }
.chat-msg--typing .chat-msg__bubble span:nth-child(2) { animation-delay: 0.15s; }
.chat-msg--typing .chat-msg__bubble span:nth-child(3) { animation-delay: 0.3s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-5px); opacity: 1; }
}

.demo-input { display: flex; gap: 12px; padding: 16px 20px; border-top: 1px solid var(--color-border); }

.demo-input__field {
  flex: 1; padding: 14px 18px; border-radius: 100px;
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border);
  font-size: 0.92rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.demo-input__field:focus { border-color: var(--color-blue); box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15); }
.demo-input__field::placeholder { color: var(--color-text-faint); }

.demo-input__send {
  width: 48px; height: 48px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--gradient-primary);
  color: #05070d;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.demo-input__send:hover { transform: scale(1.08) rotate(8deg); box-shadow: var(--shadow-glow-green); }
.demo-input__send svg { width: 18px; height: 18px; }

/* =========================================================================
   STATISTICS
   ========================================================================= */

.stat-card {
  text-align: center;
  padding: 34px 18px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(16px);
  transition: transform var(--transition-mid), border-color var(--transition-fast);
}

.stat-card:hover { transform: translateY(-6px); border-color: var(--color-border-strong); }
.stat-card__icon { font-size: 1.4rem; margin-bottom: 10px; }

.stat-card__value {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 6px;
}

.stat-card__label { color: var(--color-text-dim); font-size: 0.85rem; letter-spacing: 0.02em; }

/* =========================================================================
   PRICING
   ========================================================================= */

.pricing-card {
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(16px);
  display: flex; flex-direction: column; gap: 22px;
  transition: transform var(--transition-mid), border-color var(--transition-fast), box-shadow var(--transition-mid);
  position: relative;
}

.pricing-card:hover { transform: translateY(-8px); }

.pricing-card--popular {
  border-color: var(--color-green);
  box-shadow: 0 0 0 1px rgba(57, 255, 136, 0.4), 0 25px 60px rgba(57, 255, 136, 0.18);
  transform: scale(1.04);
}

.pricing-card--popular:hover { transform: scale(1.04) translateY(-8px); }

.pricing-card__badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--gradient-primary); color: #05070d;
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 6px 16px; border-radius: 100px; font-weight: 600;
}

.pricing-card__name { font-family: var(--font-display); font-size: 1.2rem; }

.pricing-card__price { font-family: var(--font-display); font-size: 2.5rem; font-weight: 700; }
.pricing-card__price span { font-size: 0.92rem; font-weight: 400; color: var(--color-text-faint); font-family: var(--font-body); }

.pricing-card__features { display: flex; flex-direction: column; gap: 12px; flex: 1; }

.pricing-card__features li { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; color: var(--color-text-dim); }

.pricing-card__features li::before {
  content: "";
  width: 16px; height: 16px; flex-shrink: 0;
  background: var(--gradient-primary);
  mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="black" stroke-width="3"><path d="M20 6 9 17l-5-5"/></svg>') center / contain no-repeat;
  -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="black" stroke-width="3"><path d="M20 6 9 17l-5-5"/></svg>') center / contain no-repeat;
}

/* =========================================================================
   DOWNLOAD SECTION
   ========================================================================= */

.download-panel {
  position: relative;
  text-align: center;
  padding: 64px 40px;
  overflow: hidden;
}

.download-panel__glow {
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(0, 212, 255, 0.18), transparent 60%);
  pointer-events: none;
}

.download-panel .section__title { margin-top: 4px; }
.download-panel .section__subtitle { max-width: 480px; margin: 0 auto 32px; }

.platform-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-bottom: 20px; }
.platform-row .btn svg { width: 20px; height: 20px; }

.platform-soon {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 15px 24px;
  font-size: 0.9rem;
  color: var(--color-text-faint);
  border: 1.5px dashed var(--color-border-strong);
  border-radius: 100px;
}

.platform-soon svg { width: 18px; height: 18px; opacity: 0.6; }

.download-panel__note { font-size: 0.8rem; color: var(--color-text-faint); font-family: var(--font-mono); }

/* =========================================================================
   FAQ ACCORDION
   ========================================================================= */

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  backdrop-filter: blur(14px);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.is-open { border-color: var(--color-border-strong); }

.faq-item__question {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  font-family: var(--font-display); font-size: 1rem; font-weight: 600;
  text-align: left;
}

.faq-item__icon { width: 22px; height: 22px; flex-shrink: 0; position: relative; margin-left: 16px; }
.faq-item__icon::before, .faq-item__icon::after { content: ""; position: absolute; background: var(--color-green); border-radius: 2px; transition: transform var(--transition-fast); }
.faq-item__icon::before { top: 50%; left: 0; width: 100%; height: 2px; transform: translateY(-50%); }
.faq-item__icon::after { left: 50%; top: 0; width: 2px; height: 100%; transform: translateX(-50%); }
.faq-item.is-open .faq-item__icon::after { transform: translateX(-50%) rotate(90deg); opacity: 0; }

.faq-item__answer { max-height: 0; overflow: hidden; transition: max-height var(--transition-mid); }
.faq-item__answer-inner { padding: 0 24px 22px; color: var(--color-text-dim); font-size: 0.94rem; line-height: 1.7; }

/* =========================================================================
   ABOUT
   ========================================================================= */

.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 50px; align-items: start; }
.about-grid__title { margin-bottom: 18px; }
.about-grid__text { color: var(--color-text-dim); margin-bottom: 16px; font-size: 0.98rem; }

.about-grid__specs { padding: 30px; }
.about-grid__specs h3 { font-size: 1.05rem; margin-bottom: 18px; }

.spec-list { display: flex; flex-direction: column; gap: 12px; }

.spec-list li {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.88rem;
  color: var(--color-text-dim);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.spec-list li:last-child { border-bottom: none; padding-bottom: 0; }

.spec-list li::before {
  content: "";
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 8px var(--color-green);
  flex-shrink: 0;
}

/* =========================================================================
   CONTACT FORM
   ========================================================================= */

.contact-form { padding: 40px; display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field label { font-size: 0.85rem; font-weight: 600; color: var(--color-text-dim); }

.form-field input, .form-field textarea {
  padding: 14px 16px; border-radius: var(--radius-sm);
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border);
  font-size: 0.94rem;
  resize: vertical;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-field input::placeholder, .form-field textarea::placeholder { color: var(--color-text-faint); }
.form-field input:focus, .form-field textarea:focus { border-color: var(--color-blue); box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15); }
.form-field.has-error input, .form-field.has-error textarea { border-color: #ff5f6d; box-shadow: 0 0 0 3px rgba(255, 95, 109, 0.15); }

.form-error { font-size: 0.78rem; color: #ff8a94; min-height: 1em; }

.form-success {
  text-align: center; color: var(--color-green); font-size: 0.92rem; font-weight: 600;
  opacity: 0; height: 0; overflow: hidden; transition: opacity var(--transition-fast);
}

.form-success.is-visible { opacity: 1; height: auto; }
.form-success.form-success--error { color: #ff8a94; }

/* =========================================================================
   FOOTER
   ========================================================================= */

.footer { border-top: 1px solid var(--color-border); padding-top: 70px; background: var(--color-bg-alt); }
.footer__inner { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 50px; }
.footer__tagline { color: var(--color-text-dim); font-size: 0.92rem; margin: 16px 0 22px; max-width: 320px; }
.footer__socials { display: flex; gap: 12px; }

.social-icon {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-dim);
  transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.social-icon svg { width: 16px; height: 16px; }
.social-icon:hover { color: var(--color-green); border-color: var(--color-green); transform: translateY(-4px); box-shadow: var(--shadow-glow-green); }

.footer__col { display: flex; flex-direction: column; gap: 12px; }
.footer__col h4 { font-family: var(--font-display); font-size: 0.95rem; margin-bottom: 6px; }
.footer__col a { font-size: 0.9rem; color: var(--color-text-dim); transition: color var(--transition-fast); width: fit-content; }
.footer__col a:hover { color: var(--color-green); }

.footer__bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px;
  padding-block: 24px;
  border-top: 1px solid var(--color-border);
  font-size: 0.82rem;
  color: var(--color-text-faint);
}

/* =========================================================================
   SCROLL TO TOP
   ========================================================================= */

.scroll-top {
  position: fixed; bottom: 28px; right: 28px;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border-strong);
  backdrop-filter: blur(14px);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  z-index: 900;
}

.scroll-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.scroll-top:hover { border-color: var(--color-blue); box-shadow: var(--shadow-glow-blue); }
.scroll-top svg { width: 20px; height: 20px; }

/* =========================================================================
   SCROLL-TRIGGERED FADE ANIMATION
   ========================================================================= */

.fade-in-up {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.7s ease var(--delay, 0s), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1) var(--delay, 0s);
}

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

/* =========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================= */

@media (max-width: 1080px) {
  .grid--features { grid-template-columns: repeat(3, 1fr); }
  .grid--stats { grid-template-columns: repeat(3, 1fr); }
  .capability-chip--2, .capability-chip--5 { display: none; }
}

@media (max-width: 900px) {
  .navbar__links { display: none; }
  .hamburger { display: flex; }
  .hero { padding-top: calc(var(--nav-height) + 30px); }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .skills-groups { grid-template-columns: 1fr; }
  .acronym-break { display: block; }
}

@media (max-width: 720px) {
  .grid--features { grid-template-columns: repeat(2, 1fr); }
  .grid--stats { grid-template-columns: repeat(2, 1fr); }
  .grid--pricing { grid-template-columns: 1fr; }
  .pricing-card--popular { transform: scale(1); }
  .pricing-card--popular:hover { transform: translateY(-8px); }
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 28px; }
  .hero__robot-stage { min-height: 380px; }
  .capability-chip--1, .capability-chip--4 { top: 0%; }
  .capability-chip--3, .capability-chip--6 { bottom: 2%; }
  .capability-chip { font-size: 0.7rem; padding: 8px 12px; }
}

@media (max-width: 560px) {
  .grid--features { grid-template-columns: 1fr; }
  .grid--stats { grid-template-columns: 1fr 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
  .hero__title { font-size: 2.6rem; }
  .navbar__logo-tagline { display: none; }
  .navbar__actions > .btn--primary { display: none; }
  .navbar__inner { padding-inline: 16px; gap: 10px; }
  .demo-chat { height: 320px; }
  .cursor-glow { display: none; }
  .capability-chip--2, .capability-chip--5 { display: none; }
  .platform-row { flex-direction: column; align-items: stretch; }
}