/* ===== DESIGN TOKENS ===== */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* ===== DARK THEME (default) ===== */
:root, [data-theme="dark"] {
  --color-bg: #0a0a12;
  --color-surface: #0f0f1a;
  --color-surface-2: #141425;
  --color-surface-3: #1a1a30;
  --color-border: #2a2a45;
  --color-text: #e8e8f0;
  --color-text-muted: #8888a8;
  --color-text-faint: #55556a;
  --color-primary: #00d4ff;
  --color-primary-hover: #00b8e0;
  --color-primary-glow: rgba(0, 212, 255, 0.15);
  --color-accent: #7b61ff;
  --color-accent-glow: rgba(123, 97, 255, 0.15);
  --color-gradient-start: #00d4ff;
  --color-gradient-end: #7b61ff;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.2);
}

/* ===== LIGHT THEME ===== */
[data-theme="light"] {
  --color-bg: #f4f4f8;
  --color-surface: #ffffff;
  --color-surface-2: #eeeef4;
  --color-surface-3: #e4e4ee;
  --color-border: #c8c8d8;
  --color-text: #1a1a2e;
  --color-text-muted: #5a5a78;
  --color-text-faint: #9090a8;
  --color-primary: #0090b0;
  --color-primary-hover: #007a96;
  --color-primary-glow: rgba(0, 144, 176, 0.1);
  --color-accent: #5a40cc;
  --color-accent-glow: rgba(90, 64, 204, 0.1);
  --color-gradient-start: #0090b0;
  --color-gradient-end: #5a40cc;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 30px rgba(0, 144, 176, 0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg: #f4f4f8;
    --color-surface: #ffffff;
    --color-surface-2: #eeeef4;
    --color-surface-3: #e4e4ee;
    --color-border: #c8c8d8;
    --color-text: #1a1a2e;
    --color-text-muted: #5a5a78;
    --color-text-faint: #9090a8;
    --color-primary: #0090b0;
    --color-primary-hover: #007a96;
    --color-primary-glow: rgba(0, 144, 176, 0.1);
    --color-accent: #5a40cc;
    --color-accent-glow: rgba(90, 64, 204, 0.1);
    --color-gradient-start: #0090b0;
    --color-gradient-end: #5a40cc;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
    --shadow-glow: 0 0 30px rgba(0, 144, 176, 0.12);
  }
}

/* ===== GLOBAL STYLES ===== */
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) var(--space-6);
  background: color-mix(in srgb, var(--color-bg) 80%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.3s ease;
}

.nav-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.nav-logo svg {
  width: 36px;
  height: 36px;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-interactive);
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: #fff !important;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.theme-toggle:hover {
  color: var(--color-primary);
  background: var(--color-primary-glow);
}

/* Mobile menu toggle */
.nav-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .nav-menu-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    transition: transform 0.3s var(--ease-out);
  }
  .nav-links.open {
    transform: translateY(0);
  }
}

/* ===== HERO SECTION ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-32) var(--space-6) var(--space-16);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--color-bg) 40%, transparent) 0%,
    color-mix(in srgb, var(--color-bg) 70%, transparent) 50%,
    var(--color-bg) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary-glow);
  border: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero-badge .pulse {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(0, 212, 255, 0); }
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: var(--space-6);
  letter-spacing: -0.03em;
}

.hero p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: #fff;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: transparent;
  color: var(--color-text);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-interactive), background var(--transition-interactive), transform var(--transition-interactive);
  cursor: pointer;
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-glow);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(0);
}

/* ===== SECTIONS ===== */
.section {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
}

.section-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: clamp(var(--space-10), 4vw, var(--space-16));
}

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
}

.section-header h2 {
  font-size: var(--text-2xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== SERVICES GRID ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr));
  gap: var(--space-6);
}

.service-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.service-card-image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.service-card-body {
  padding: var(--space-6);
}

.service-card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-glow), var(--color-accent-glow));
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.service-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.service-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.service-features {
  list-style: none;
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.service-features li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.service-features li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ===== ABOUT / STATS ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: var(--space-8); }
}

.about-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.about-image img {
  width: 100%;
  height: auto;
}

.about-text h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.about-text p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.stat {
  text-align: center;
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ===== PROCESS ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: var(--space-6);
  counter-reset: step;
}

.process-step {
  position: relative;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  counter-increment: step;
  transition: border-color var(--transition-interactive);
}

.process-step:hover {
  border-color: color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.process-step-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-3);
}

.process-step h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.process-step p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== CHAT / NEURONA ===== */
.chat-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.chat-container {
  max-width: 800px;
  margin: 0 auto;
}

.chat-window {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.chat-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}

.chat-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: var(--text-sm);
}

.chat-header-info h3 {
  font-size: var(--text-sm);
  font-weight: 700;
}

.chat-header-info span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.chat-header-info .online-dot {
  width: 6px;
  height: 6px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.chat-messages {
  padding: var(--space-5);
  min-height: 350px;
  max-height: 450px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.chat-message {
  display: flex;
  gap: var(--space-3);
  max-width: 85%;
  animation: msgIn 0.3s var(--ease-out) both;
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-message.bot {
  align-self: flex-start;
}

.chat-message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.msg-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 700;
}

.msg-avatar.bot-avatar {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: #fff;
}

.msg-avatar.user-avatar {
  background: var(--color-surface-3);
  color: var(--color-text-muted);
}

.msg-bubble {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.bot .msg-bubble {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
}

.user .msg-bubble {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: #fff;
}

.chat-input-area {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-2);
}

.chat-input {
  flex: 1;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-interactive);
}

.chat-input:focus {
  border-color: var(--color-primary);
}

.chat-input::placeholder {
  color: var(--color-text-faint);
}

.chat-send {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: #fff;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
  flex-shrink: 0;
}

.chat-send:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.chat-send:active {
  transform: translateY(0);
}

.chat-send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Retell chat body */
.chat-retell-body {
  padding: var(--space-8) var(--space-5);
  min-height: 350px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-retell-prompt {
  text-align: center;
  max-width: 480px;
}

.chat-retell-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-glow), var(--color-accent-glow));
  border: 1px solid color-mix(in srgb, var(--color-primary) 25%, transparent);
  border-radius: 50%;
  color: var(--color-primary);
  animation: pulse 2s infinite;
}

.chat-retell-text {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-3);
}

.retell-indicator {
  font-size: 1.2em;
}

.chat-retell-subtext {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* New chat button */
.chat-new-btn {
  margin-left: auto;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color var(--transition-interactive), border-color var(--transition-interactive), background var(--transition-interactive);
}

.chat-new-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-glow);
}

.typing-indicator {
  display: flex;
  gap: 4px;
  padding: var(--space-2);
}

.typing-indicator span {
  width: 6px;
  height: 6px;
  background: var(--color-text-muted);
  border-radius: 50%;
  animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-4px); }
}

/* ===== CTA SECTION ===== */
.cta-section {
  position: relative;
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at 50% 50%,
    var(--color-primary-glow) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.cta-section h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.cta-section p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== FOOTER ===== */
.footer {
  padding: var(--space-12) var(--space-6) var(--space-6);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr; gap: var(--space-6); }
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-top: var(--space-3);
  max-width: 320px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-interactive);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  max-width: var(--content-wide);
  margin: var(--space-8) auto 0;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-bottom a {
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer-bottom a:hover {
  color: var(--color-primary);
}

/* ===== SCROLL ANIMATIONS ===== */
.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* Fallback for browsers without scroll-driven animations */
@supports not (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    transition: opacity 0.6s var(--ease-out);
  }
  .fade-in.visible {
    opacity: 1;
  }
}

/* ===== PARTICLE CANVAS ===== */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.4;
}

/* ===== FLOATING CHAT BUTTON ===== */
.fab-chat {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 90;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: #fff;
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.35);
  text-decoration: none;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
  animation: fab-pulse 3s ease-in-out infinite;
}

.fab-chat:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px rgba(0, 212, 255, 0.5);
}

.fab-chat:active {
  transform: scale(0.95);
}

@keyframes fab-pulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(0, 212, 255, 0.35); }
  50% { box-shadow: 0 4px 28px rgba(0, 212, 255, 0.55); }
}

/* ===== FLOATING VOICE BUTTON ===== */
.fab-voice {
  position: fixed;
  bottom: 96px;
  right: 28px;
  z-index: 90;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent), #ff6b9d);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(123, 97, 255, 0.35);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
  animation: fab-voice-pulse 3s ease-in-out infinite 1.5s;
}

.fab-voice:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px rgba(123, 97, 255, 0.5);
}

.fab-voice:active {
  transform: scale(0.95);
}

.fab-voice.active {
  background: #ef4444;
  box-shadow: 0 4px 20px rgba(239, 68, 68, 0.4);
  animation: none;
}

.fab-voice.active .fab-voice-icon { display: none; }
.fab-voice.active .fab-voice-icon-active { display: block !important; }

@keyframes fab-voice-pulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(123, 97, 255, 0.35); }
  50% { box-shadow: 0 4px 28px rgba(123, 97, 255, 0.55); }
}

/* ===== VOICE CALL OVERLAY ===== */
.voice-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: none;
  align-items: center;
  justify-content: center;
}

.voice-overlay.active {
  display: flex;
}

.voice-overlay-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.voice-avatar-ring {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-primary);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.voice-avatar-ring.speaking {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 8px rgba(0, 212, 255, 0.15), 0 0 0 16px rgba(0, 212, 255, 0.07);
  animation: voice-ring-pulse 1.2s ease-in-out infinite;
}

@keyframes voice-ring-pulse {
  0%, 100% { box-shadow: 0 0 0 8px rgba(0, 212, 255, 0.15), 0 0 0 16px rgba(0, 212, 255, 0.07); }
  50% { box-shadow: 0 0 0 14px rgba(0, 212, 255, 0.2), 0 0 0 24px rgba(0, 212, 255, 0.1); }
}

.voice-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.voice-status {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  font-weight: 500;
}

.voice-hangup {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: #ef4444;
  color: #fff;
  border: none;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: background 0.2s, transform var(--transition-interactive);
}

.voice-hangup:hover {
  background: #dc2626;
  transform: translateY(-1px);
}