/* ============================================================
   TOIN Design System v2 — Dark Theme
   ============================================================ */

:root {
  --color-primary: #fbbf24;
  --color-primary-hover: #f59e0b;
  --color-dark: #0a0a0a;
  --color-surface: #111111;
  --color-surface-2: #1a1a1a;
  --color-purple: #7c3aed;
  --color-purple-light: #8b5cf6;
  --color-border: rgba(251, 191, 36, 0.15);
  --color-text: #e5e7eb;
  --color-text-muted: #9ca3af;
  --radius-lg: 16px;
  --radius-sm: 4px;
  --shadow-glow: 0 0 20px rgba(251, 191, 36, 0.1);
  --transition: 0.2s ease;
}

/* ============================================================
   Reset & Base
   ============================================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--color-dark);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

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

/* ============================================================
   Keyframes
   ============================================================ */

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes pulse-ring {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  100% {
    transform: scale(1.4);
    opacity: 0;
  }
}

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

@keyframes shimmer {
  0% {
    background-position: -200% center;
  }
  100% {
    background-position: 200% center;
  }
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   Layout
   ============================================================ */

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

/* ============================================================
   Navbar
   ============================================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo-img {
  height: 36px;
  width: auto;
  display: block;
}

.footer-logo-img {
  height: 32px;
  width: auto;
  display: block;
  margin: 0 auto 8px;
}

.nav-cta {
  background: var(--color-primary);
  color: #000;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background var(--transition), transform var(--transition);
}

.nav-cta:hover {
  background: var(--color-primary-hover);
  color: #000;
  transform: translateY(-1px);
}

/* ============================================================
   Hero Section
   ============================================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 40%, rgba(251, 191, 36, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  animation: heroFadeIn 0.8s ease both;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid var(--color-border);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 32px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
  color: #fff;
}

.hero h1 .highlight {
  color: var(--color-primary);
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #000;
  padding: 14px 32px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(251, 191, 36, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  padding: 14px 32px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* ============================================================
   Section Headers
   ============================================================ */

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto;
}

/* ============================================================
   How It Works — 3 Cards
   ============================================================ */

.how-it-works {
  background: var(--color-surface);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--color-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.card-number {
  width: 40px;
  height: 40px;
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ============================================================
   Use Cases — Grid 2x2
   ============================================================ */

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.use-case-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.use-case-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

.use-case-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.use-case-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.use-case-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   CTA Final
   ============================================================ */

.cta-section {
  background: var(--color-surface);
  text-align: center;
}

.cta-section h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto 40px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   WhatsApp CTA
   ============================================================ */

.whatsapp-section {
  padding: 48px 0;
  background: var(--color-dark);
  border-top: 1px solid var(--color-border);
}

.whatsapp-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  background: var(--color-surface);
  border: 1px solid rgba(37, 211, 102, 0.2);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  flex-wrap: wrap;
}

.whatsapp-text h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.whatsapp-text p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  max-width: 480px;
}

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #25d366;
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: 10px;
  white-space: nowrap;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  flex-shrink: 0;
}

.btn-whatsapp:hover {
  background: #20bb5a;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.3);
}

@media (max-width: 640px) {
  .whatsapp-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
  }
  .btn-whatsapp {
    width: 100%;
    justify-content: center;
  }
}

/* ============================================================
   Footer
   ============================================================ */

footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
  text-align: center;
}

.footer-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 8px;
}

footer p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ============================================================
   Chat Widget
   ============================================================ */

.chat-widget {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 9999;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Toggle Button */
.chat-toggle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--color-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 4px 16px rgba(251, 191, 36, 0.4);
  transition: transform var(--transition), background var(--transition);
  position: relative;
}

.chat-toggle:hover {
  transform: scale(1.08);
  background: var(--color-primary-hover);
}

.chat-toggle::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  animation: pulse-ring 1.5s ease-out infinite;
}

/* Chat Window */
.chat-window {
  position: absolute;
  bottom: 72px;
  right: 0;
  width: 380px;
  height: 580px;
  background: rgba(10, 10, 10, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(251, 191, 36, 0.05);

  /* Hidden by default */
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.chat-window.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
  animation: slideUp 0.25s ease both;
}

/* Chat Header */
.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: #000;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;

  background-image: linear-gradient(
    90deg,
    transparent 0%,
    rgba(251, 191, 36, 0.04) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: shimmer 3s linear infinite;
}

.chat-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #f97316);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  color: #000;
  flex-shrink: 0;
}

.chat-header-info {
  flex: 1;
  min-width: 0;
}

.chat-header-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.chat-status {
  font-size: 0.75rem;
  color: #4ade80;
  display: flex;
  align-items: center;
  gap: 4px;
}

.chat-status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ade80;
  flex-shrink: 0;
}

.chat-reset,
.chat-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.chat-reset:hover,
.chat-close:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

/* Messages Area */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
  width: 4px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: rgba(251, 191, 36, 0.25);
  border-radius: 2px;
}

/* Messages */
.message {
  max-width: 82%;
  padding: 10px 14px;
  font-size: 0.875rem;
  line-height: 1.6;
  word-wrap: break-word;
  animation: fadeIn 0.2s ease both;
}

.message.bot {
  background: var(--color-surface-2);
  color: #e5e7eb;
  border-radius: var(--radius-sm) var(--radius-lg) var(--radius-lg) var(--radius-lg);
  align-self: flex-start;
  border: 1px solid rgba(251, 191, 36, 0.08);
}

.message.user {
  background: var(--color-purple);
  color: #fff;
  border-radius: var(--radius-lg) var(--radius-sm) var(--radius-lg) var(--radius-lg);
  align-self: flex-end;
}

/* Markdown helpers inside messages */
.message strong { font-weight: 700; }
.message em { font-style: italic; }
.message hr {
  border: none;
  border-top: 1px solid rgba(251, 191, 36, 0.2);
  margin: 8px 0;
}
.message ul {
  padding-left: 18px;
  margin: 6px 0;
}
.message li { margin: 3px 0; }
.message .md-heading {
  font-weight: 700;
  color: var(--color-primary);
  display: block;
  margin-bottom: 4px;
}
.message .md-hr {
  border: none;
  border-top: 1px solid rgba(251, 191, 36, 0.2);
  margin: 8px 0;
}

/* Typing Indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 12px 14px;
  background: var(--color-surface-2);
  border-radius: var(--radius-sm) var(--radius-lg) var(--radius-lg) var(--radius-lg);
  align-self: flex-start;
  border: 1px solid rgba(251, 191, 36, 0.08);
  animation: fadeIn 0.2s ease both;
}

.typing-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: bounce 0.5s ease infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.15s; }
.typing-dot:nth-child(3) { animation-delay: 0.3s; }

/* Input Area */
.chat-input-area {
  padding: 12px 16px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: flex-end;
  gap: 10px;
  flex-shrink: 0;
  background: rgba(0, 0, 0, 0.4);
}

.chat-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--color-text);
  font-size: 0.875rem;
  font-family: inherit;
  resize: none;
  line-height: 1.5;
  max-height: 120px;
  padding: 6px 0;
}

.chat-input::placeholder {
  color: rgba(156, 163, 175, 0.5);
}

.send-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--color-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: background var(--transition), transform var(--transition);
  align-self: flex-end;
}

.send-btn:hover:not(:disabled) {
  background: var(--color-primary-hover);
  transform: scale(1.05);
}

.send-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ============================================================
   Mobile
   ============================================================ */

@media (max-width: 480px) {
  .chat-widget {
    bottom: 0;
    right: 0;
  }

  .chat-toggle {
    bottom: 20px;
    right: 20px;
    position: fixed;
  }

  .chat-window {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100dvh;
    border-radius: 0;
    bottom: auto;
    right: auto;
  }

  .hero h1 {
    letter-spacing: -0.5px;
  }

  .cards-grid,
  .use-cases-grid {
    grid-template-columns: 1fr;
  }
}