@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Space+Mono:wght@400;700&family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap');

:root {
  --bg: #0a0a0f;
  --bg-card: #12121a;
  --bg-elevated: #1a1a26;
  --border: #2a2a3a;
  --text: #e8e8ef;
  --text-dim: #8888a0;
  --text-muted: #55556a;
  --accent: #6cf5c2;
  --accent-dim: rgba(108,245,194,0.15);
  --accent2: #c084fc;
  --accent3: #60a5fa;
  --accent4: #fb923c;
  --accent5: #f472b6;
  --gradient-1: linear-gradient(135deg, #6cf5c2 0%, #60a5fa 100%);
  --gradient-2: linear-gradient(135deg, #c084fc 0%, #f472b6 100%);
  --radius: 16px;
  --radius-sm: 8px;
  --font: 'DM Sans', 'Noto Sans SC', sans-serif;
  --mono: 'Space Mono', monospace;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.7;
  overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* Navigation */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  backdrop-filter: blur(20px);
  background: rgba(10,10,15,0.8);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}
nav .logo {
  font-family: var(--mono);
  font-weight: 700; font-size: 1.25rem;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}
nav .nav-links { display: flex; gap: 1.5rem; align-items: center; }
nav .nav-links a {
  color: var(--text-dim); text-decoration: none;
  font-size: 0.85rem; font-weight: 500;
  transition: color 0.3s;
}
nav .nav-links a:hover { color: var(--accent); }
.nav-pill {
  background: var(--accent-dim);
  color: var(--accent) !important;
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid rgba(108,245,194,0.2);
}
.lang-btn {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 5px 14px;
  border-radius: 20px;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
  letter-spacing: 0.5px;
  margin-left: 0.25rem;
}
.lang-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 8rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(ellipse at 50% 30%, rgba(108,245,194,0.06) 0%, transparent 60%),
              radial-gradient(ellipse at 30% 70%, rgba(192,132,252,0.04) 0%, transparent 50%);
  pointer-events: none;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent-dim);
  border: 1px solid rgba(108,245,194,0.2);
  border-radius: 30px; padding: 8px 20px;
  font-size: 0.82rem; font-weight: 500;
  color: var(--accent); margin-bottom: 2rem;
  animation: fadeUp 0.8s ease;
}
.hero h1 {
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  font-weight: 700; letter-spacing: -2px;
  line-height: 1.1; margin-bottom: 1.5rem;
  animation: fadeUp 0.8s ease 0.1s both;
}
.hero h1 span {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 1.2rem; color: var(--text-dim);
  max-width: 640px; margin-bottom: 3rem;
  animation: fadeUp 0.8s ease 0.2s both;
}
.hero-stats {
  display: flex; gap: 3rem;
  animation: fadeUp 0.8s ease 0.3s both;
}
.hero-stats .stat { text-align: center; }
.hero-stats .stat-val {
  font-family: var(--mono);
  font-size: 2rem; font-weight: 700;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-stats .stat-label {
  font-size: 0.8rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 1px;
}

/* Sections */
section { padding: 6rem 2rem; max-width: 1200px; margin: 0 auto; }
.section-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 1rem;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 1rem;
}
.section-desc {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 600px;
  margin-bottom: 3rem;
}

/* Architecture Diagram */
.arch-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3rem;
  margin: 3rem 0;
  overflow-x: auto;
}
.arch-flow {
  display: flex; align-items: center; justify-content: center;
  gap: 0; flex-wrap: wrap; min-width: 900px;
}
.arch-node {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.2rem 1.5rem;
  text-align: center;
  min-width: 140px;
  transition: all 0.3s;
}
.arch-node:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(108,245,194,0.1);
  transform: translateY(-2px);
}
.arch-node .node-icon { font-size: 1.8rem; margin-bottom: 0.5rem; }
.arch-node .node-title { font-weight: 600; font-size: 0.9rem; margin-bottom: 0.25rem; }
.arch-node .node-sub { font-size: 0.75rem; color: var(--text-muted); }
.arch-arrow {
  color: var(--accent);
  font-size: 1.5rem;
  padding: 0 0.5rem;
  opacity: 0.5;
}

/* Step cards */
.step-section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
}
.step-header {
  display: flex; align-items: flex-start; gap: 1.5rem;
  margin-bottom: 3rem;
}
.step-num {
  font-family: var(--mono);
  font-size: 3rem; font-weight: 700;
  line-height: 1;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  flex-shrink: 0;
}
.step-header h2 {
  font-size: 1.8rem; font-weight: 700;
  letter-spacing: -0.5px; margin-bottom: 0.5rem;
}
.step-header p { color: var(--text-dim); font-size: 1rem; }
.user-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: 20px;
  font-size: 0.75rem; font-weight: 600;
  margin-top: 0.5rem;
}
.user-sme { background: rgba(192,132,252,0.15); color: var(--accent2); }
.user-internal { background: rgba(96,165,250,0.15); color: var(--accent3); }
.user-end { background: rgba(251,146,60,0.15); color: var(--accent4); }

/* Mock UI */
.mock-ui {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.mock-titlebar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}
.mock-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.mock-dot:nth-child(1) { background: #ff5f57; }
.mock-dot:nth-child(2) { background: #ffbd2e; }
.mock-dot:nth-child(3) { background: #28c840; }
.mock-url {
  margin-left: 12px;
  background: var(--bg); border-radius: 6px;
  padding: 4px 14px; font-size: 0.75rem;
  color: var(--text-muted); font-family: var(--mono);
  flex: 1;
}
.mock-body { padding: 1.5rem; }

/* Chat UI */
.chat-container { max-width: 100%; }
.chat-messages { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem; }
.chat-msg {
  display: flex; gap: 0.75rem;
  max-width: 85%;
  animation: fadeUp 0.5s ease both;
}
.chat-msg.bot { align-self: flex-start; }
.chat-msg.user { align-self: flex-end; flex-direction: row-reverse; }
.chat-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; flex-shrink: 0;
  font-weight: 700;
}
.chat-msg.bot .chat-avatar { background: var(--accent-dim); color: var(--accent); }
.chat-msg.user .chat-avatar { background: rgba(192,132,252,0.15); color: var(--accent2); }
.chat-bubble {
  padding: 0.75rem 1rem;
  border-radius: 14px;
  font-size: 0.9rem;
  line-height: 1.5;
}
.chat-msg.bot .chat-bubble {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}
.chat-msg.user .chat-bubble {
  background: rgba(192,132,252,0.12);
  border: 1px solid rgba(192,132,252,0.2);
  border-bottom-right-radius: 4px;
}
.chat-input-row {
  display: flex; gap: 0.5rem;
}
.chat-input {
  flex: 1;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.3s;
}
.chat-input:focus { border-color: var(--accent); }
.chat-send {
  background: var(--accent);
  color: var(--bg);
  border: none; border-radius: 12px;
  padding: 0 1.2rem;
  font-weight: 600; font-size: 0.85rem;
  cursor: pointer;
  transition: opacity 0.2s;
}
.chat-send:hover { opacity: 0.85; }

/* Config panel */
.config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
@media (max-width: 768px) { .config-grid { grid-template-columns: 1fr; } }
.config-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
}
.config-card h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.config-val {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.6;
}
.config-tag {
  display: inline-block;
  background: var(--accent-dim);
  color: var(--accent);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.78rem;
  margin: 2px 4px 2px 0;
}

/* Phone demo */
.phone-frame {
  width: 320px;
  margin: 0 auto;
  background: #000;
  border-radius: 36px;
  padding: 12px;
  border: 2px solid #333;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.phone-screen {
  background: var(--bg-card);
  border-radius: 26px;
  overflow: hidden;
  min-height: 500px;
}
.phone-status {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px 8px;
  font-size: 0.72rem; font-weight: 600; color: var(--text);
}
.phone-notch {
  width: 100px; height: 28px;
  background: #000;
  border-radius: 0 0 16px 16px;
  margin: 0 auto;
}
.call-screen {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 2rem 1rem;
  text-align: center;
}
.call-avatar-ring {
  width: 90px; height: 90px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.5rem;
  animation: pulse-ring 2s ease infinite;
}
.call-avatar-inner {
  width: 70px; height: 70px;
  border-radius: 50%;
  background: var(--accent-dim);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
}
.call-name { font-size: 1.2rem; font-weight: 600; margin-bottom: 0.25rem; }
.call-status { font-size: 0.82rem; color: var(--accent); margin-bottom: 2rem; }
.call-transcript {
  background: var(--bg-elevated);
  border-radius: 12px;
  padding: 1rem;
  margin: 0 0.5rem 1.5rem;
  text-align: left;
  font-size: 0.82rem;
  line-height: 1.6;
  max-height: 180px;
  overflow-y: auto;
}
.call-transcript .t-agent { color: var(--accent); }
.call-transcript .t-user { color: var(--accent4); }
.call-actions {
  display: flex; gap: 1.5rem; margin-top: 1rem;
}
.call-btn {
  width: 50px; height: 50px;
  border-radius: 50%;
  border: none;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; cursor: pointer;
}
.call-btn-end { background: #ef4444; }
.call-btn-mute { background: var(--bg-elevated); border: 1px solid var(--border); }

/* Calendar */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  margin-bottom: 1.5rem;
}
.cal-header {
  text-align: center;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 0;
  text-transform: uppercase;
}
.cal-day {
  aspect-ratio: 1;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  border-radius: 8px;
  font-size: 0.82rem;
  cursor: default;
  transition: all 0.2s;
  position: relative;
}
.cal-day.has-event::after {
  content: '';
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  position: absolute;
  bottom: 4px;
}
.cal-day.today {
  background: var(--accent);
  color: var(--bg);
  font-weight: 700;
}
.cal-day.other { color: var(--text-muted); }
.agenda-list { display: flex; flex-direction: column; gap: 0.75rem; }
.agenda-item {
  display: flex; align-items: center; gap: 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  transition: all 0.2s;
}
.agenda-item:hover { border-color: var(--accent); }
.agenda-time {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  min-width: 60px;
}
.agenda-info h5 { font-size: 0.9rem; font-weight: 600; }
.agenda-info p { font-size: 0.78rem; color: var(--text-dim); }
.agenda-type {
  margin-left: auto;
  font-size: 1.2rem;
}

/* Report */
.report-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 1.5rem;
}
.report-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.report-header h3 { font-size: 1.1rem; font-weight: 600; }
.report-date { font-family: var(--mono); font-size: 0.8rem; color: var(--text-muted); }
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}
@media (max-width: 768px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }
.stat-card {
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
}
.stat-card .sc-val {
  font-family: var(--mono);
  font-size: 1.8rem;
  font-weight: 700;
}
.stat-card .sc-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.alert-list { display: flex; flex-direction: column; gap: 0.75rem; }
.alert-item {
  display: flex; align-items: flex-start; gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}
.alert-item.info { background: rgba(96,165,250,0.1); border-left: 3px solid var(--accent3); }
.alert-item.warn { background: rgba(251,146,60,0.1); border-left: 3px solid var(--accent4); }
.alert-item.success { background: rgba(108,245,194,0.1); border-left: 3px solid var(--accent); }
.alert-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }

/* Flow diagram */
.flow-container {
  display: flex; flex-direction: column;
  align-items: center; gap: 0;
  padding: 2rem 0;
}
.flow-node {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 2rem;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 500;
  min-width: 200px;
  transition: all 0.3s;
}
.flow-node:hover { border-color: var(--accent); }
.flow-node.highlight {
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(108,245,194,0.15);
}
.flow-arrow-down {
  width: 2px; height: 30px;
  background: var(--accent);
  opacity: 0.4;
  position: relative;
}
.flow-arrow-down::after {
  content: '▼';
  position: absolute;
  bottom: -10px; left: 50%;
  transform: translateX(-50%);
  font-size: 0.6rem;
  color: var(--accent);
  opacity: 0.6;
}

/* Two column layout */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } }

/* Spec Table */
.spec-table {
  width: 100%;
  border-collapse: collapse;
}
.spec-table th, .spec-table td {
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}
.spec-table th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Animations */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse-ring {
  0%, 100% { box-shadow: 0 0 0 0 rgba(108,245,194,0.3); }
  50% { box-shadow: 0 0 0 12px rgba(108,245,194,0); }
}
.fade-in { animation: fadeUp 0.6s ease both; }

/* Bar chart */
.bar-chart { display: flex; align-items: flex-end; gap: 6px; height: 120px; margin-top: 1rem; }
.bar-col { display: flex; flex-direction: column; align-items: center; gap: 4px; flex: 1; }
.bar {
  width: 100%; border-radius: 4px 4px 0 0;
  background: var(--accent);
  opacity: 0.7;
  transition: opacity 0.2s;
}
.bar:hover { opacity: 1; }
.bar-label { font-size: 0.65rem; color: var(--text-muted); }

/* Tech stack */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
}
.tech-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  display: flex; align-items: center; gap: 0.75rem;
  font-size: 0.85rem; font-weight: 500;
}
.tech-icon { font-size: 1.3rem; }