/* Root Variables for Color Scheme and Fonts */
:root {
  --bg-primary: #0a0b0e;
  --bg-secondary: #12151c;
  --bg-tertiary: #1b1f2b;
  --accent-cyan: #00f2fe;
  --accent-purple: #9d4edd;
  --accent-purple-glow: rgba(157, 78, 221, 0.4);
  --accent-cyan-glow: rgba(0, 242, 254, 0.4);
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.15);
  
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

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

/* Layout Utilities */
.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(10, 11, 14, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.brand-logo {
  height: 36px;
  width: auto;
  border-radius: 6px;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 2px;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-smooth);
}

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

.cta-nav {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  color: var(--bg-primary) !important;
  padding: 8px 18px;
  border-radius: 20px;
  font-weight: 600 !important;
  box-shadow: 0 4px 15px var(--accent-purple-glow);
}

.cta-nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-cyan-glow);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 30px;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition-smooth);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), #00c6ff);
  color: var(--bg-primary);
  box-shadow: 0 4px 20px var(--accent-cyan-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-cyan-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-block {
  display: block;
  width: 100%;
  text-align: center;
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 140px 20px 80px;
  text-align: center;
}

.hero-bg-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-purple-glow) 0%, transparent 70%);
  z-index: 1;
  pointer-events: none;
  filter: blur(80px);
}

.hero-container {
  max-width: 850px;
  position: relative;
  z-index: 2;
}

.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero-title {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  font-weight: 300;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 20px;
}

/* Features Section */
.features-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 60px;
  font-weight: 300;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 40px 30px;
  border-radius: 16px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--accent-cyan-glow), transparent 40%);
  opacity: 0;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-cyan);
  box-shadow: 0 10px 30px var(--border-glow);
}

.feature-card:hover::before {
  opacity: 0.15;
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Demo Section (Interactive Terminal) */
.demo-section {
  position: relative;
}

.demo-wrapper {
  max-width: 900px;
  margin: 0 auto;
}

.terminal-window {
  background: #0f111a;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 40px var(--border-glow);
  overflow: hidden;
}

.terminal-header {
  background: #171a26;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.dot.red { background-color: #ff5f56; }
.dot.yellow { background-color: #ffbd2e; }
.dot.green { background-color: #27c93f; }

.terminal-title {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.terminal-badge {
  font-size: 0.75rem;
  background: rgba(0, 242, 254, 0.1);
  color: var(--accent-cyan);
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid rgba(0, 242, 254, 0.2);
  font-weight: 600;
}

.terminal-body {
  padding: 24px;
  height: 380px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #33ff33; /* Classic terminal green or cyan depending on preference */
}

/* Custom terminal colors */
.terminal-body {
  color: #a6accd;
}

.term-line {
  margin-bottom: 8px;
  white-space: pre-wrap;
}

.term-line.system-msg {
  color: #82aaff;
}

.term-line.success-msg {
  color: #c3e88d;
}

.term-line.error-msg {
  color: #ff5370;
}

.term-line.warning-msg {
  color: #ffcb6b;
}

.term-line.command-msg {
  color: var(--accent-cyan);
}

.term-input-line {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 15px;
}

.prompt {
  color: #c792ea;
  white-space: nowrap;
}

#terminal-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  width: 100%;
}

/* Architecture Section */
.architecture-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.arch-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 65px;
  align-items: center;
}

.arch-step {
  display: flex;
  gap: 24px;
  margin-bottom: 40px;
}

.arch-step:last-child {
  margin-bottom: 0;
}

.step-num {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1;
}

.arch-step h4 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.arch-step p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Tech Stack Visual Box */
.arch-visual {
  display: flex;
  justify-content: center;
}

.visual-box {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 40px;
  width: 100%;
  max-width: 450px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.visual-node {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  width: 100%;
  text-align: center;
  transition: var(--transition-smooth);
}

.visual-node.active {
  background: rgba(0, 242, 254, 0.08);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 20px var(--accent-cyan-glow);
}

.visual-connector {
  width: 2px;
  height: 30px;
  background: linear-gradient(to bottom, var(--accent-cyan), var(--border-color));
}

.visual-connector-split {
  position: relative;
  width: 100%;
  height: 30px;
}

.branch-left {
  position: absolute;
  top: 0;
  left: 25%;
  width: 25%;
  height: 100%;
  border-left: 2px solid var(--accent-cyan);
  border-top: 2px solid var(--accent-cyan);
}

.branch-right {
  position: absolute;
  top: 0;
  right: 25%;
  width: 25%;
  height: 100%;
  border-right: 2px solid var(--accent-cyan);
  border-top: 2px solid var(--accent-cyan);
}

.visual-row {
  display: flex;
  gap: 20px;
  width: 100%;
}

.visual-row .visual-node {
  flex: 1;
}

/* Signup Section */
.signup-section {
  position: relative;
}

.signup-bg-glow {
  position: absolute;
  bottom: 0;
  right: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-cyan-glow) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(80px);
  z-index: 1;
}

.signup-card {
  background: rgba(18, 21, 28, 0.6);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 50px 40px;
  max-width: 750px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 2;
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.signup-card h2 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.signup-card p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 40px;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

.form-row {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
}

.form-row input {
  flex: 1;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 15px 20px;
  border-radius: 12px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-smooth);
}

.form-row input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
}

.form-status {
  margin-top: 20px;
  font-size: 0.95rem;
  padding: 10px;
  border-radius: 8px;
}

.form-status.success {
  background: rgba(195, 232, 141, 0.1);
  color: #c3e88d;
  border: 1px solid rgba(195, 232, 141, 0.2);
}

.form-status.error {
  background: rgba(255, 83, 112, 0.1);
  color: #ff5370;
  border: 1px solid rgba(255, 83, 112, 0.2);
}

/* Footer */
.footer {
  background: #06070a;
  border-top: 1px solid var(--border-color);
  padding: 40px 20px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  color: var(--text-secondary);
}

.footer-logo {
  height: 28px;
  width: auto;
  opacity: 0.7;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.75rem;
  }
  .nav-links {
    display: none; /* simple responsive fix */
  }
  .arch-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .form-row {
    flex-direction: column;
    gap: 15px;
  }
  .footer-container {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
}

.hidden {
  display: none !important;
}