/* ===== HEATLINK - Color Palette ===== */
:root {
  /* Primary: Deep Navy + Amber (Professional + Heat) */
  --color-bg-dark: #0a0e17;
  --color-bg-medium: #111827;
  --color-bg-card: #1a2234;
  --color-bg-elevated: #1f2937;
  
  --color-primary: #f59e0b;
  --color-primary-hover: #fbbf24;
  --color-primary-muted: rgba(245, 158, 11, 0.15);
  
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  
  --color-text: #f8fafc;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;
  
  --color-border: #334155;
  --color-border-light: #475569;
  
  --font-main: 'Outfit', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
}

/* Alternate color scheme class - Dark Teal */
.color-scheme-teal {
  --color-primary: #14b8a6;
  --color-primary-hover: #2dd4bf;
  --color-primary-muted: rgba(20, 184, 166, 0.15);
  --color-accent: #38bdf8;
  --color-accent-hover: #7dd3fc;
}

/* Alternate - Violet */
.color-scheme-violet {
  --color-primary: #8b5cf6;
  --color-primary-hover: #a78bfa;
  --color-primary-muted: rgba(139, 92, 246, 0.15);
  --color-accent: #22d3ee;
  --color-accent-hover: #67e8f9;
}

/* Alternate - Emerald */
.color-scheme-emerald {
  --color-primary: #10b981;
  --color-primary-hover: #34d399;
  --color-primary-muted: rgba(16, 185, 129, 0.15);
  --color-accent: #06b6d4;
  --color-accent-hover: #22d3ee;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--color-bg-dark);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

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

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-bg-dark);
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary-muted);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border-light);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 23, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  display: inline-flex;
  color: var(--color-text);
}

.logo:hover .logo-heat,
.logo:hover .logo-link {
  opacity: 0.9;
}

.logo-heat {
  color: var(--color-primary);
}

.logo-link {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-muted);
  font-weight: 500;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.connection-lines {
  position: absolute;
  inset: 0;
  background: 
    linear-gradient(90deg, transparent 0%, var(--color-primary-muted) 50%, transparent 100%);
  opacity: 0.3;
  animation: flow 8s ease-in-out infinite;
}

.connection-lines::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0.5;
}

.connection-lines::after {
  content: '';
  position: absolute;
  bottom: 30%;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: 0.3;
}

.glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-primary-muted) 0%, transparent 70%);
  opacity: 0.4;
}

@keyframes flow {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 0.4; }
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 800px;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Sections ===== */
section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-lead {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto 3rem;
  text-align: center;
}

/* Performance Statement */
.performance-statement {
  text-align: center;
}

.performance-statement h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.strengths-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.strength-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition);
}

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

.strength-icon {
  display: block;
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-primary);
}

.strength-card h3 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

/* Use Case Strip */
.use-case-strip {
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.use-case-strip h3 {
  font-size: 1rem;
  color: var(--color-text-dim);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.use-case-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.use-case-list span {
  color: var(--color-text-muted);
  font-size: 1rem;
}

/* Conversion Band */
.conversion-band {
  text-align: center;
  padding: 4rem 2rem;
}

.conversion-band h2 {
  font-size: 1.75rem;
  margin-bottom: 2rem;
}

/* ===== Page Headers ===== */
.page-header {
  padding: 8rem 2rem 4rem;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg-medium) 0%, var(--color-bg-dark) 100%);
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.page-header p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.service-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.service-card h3 {
  color: var(--color-primary);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

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

.service-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 1rem;
  margin-top: 3rem;
  padding: 2rem;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.service-flow span {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.service-flow span.arrow {
  color: var(--color-primary);
}

.section-heading {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  text-align: center;
}

.services-section .section-heading:first-child {
  margin-top: 0;
}

.services-section .section-heading:not(:first-child) {
  margin-top: 3rem;
}

/* ===== About ===== */
.about-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.about-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
}

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

.about-card h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

.about-card p {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.about-card ul {
  list-style: none;
  margin: 0;
}

.about-card li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.about-card li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

/* ===== Pricing ===== */
.pricing-toggle {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.pricing-toggle button {
  padding: 0.5rem 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-main);
  font-size: 0.95rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

.pricing-toggle button.active {
  background: var(--color-primary);
  color: var(--color-bg-dark);
  border-color: var(--color-primary);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.pricing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.pricing-card.featured {
  border-color: var(--color-primary);
  position: relative;
}

.pricing-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.pricing-card .desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.pricing-card ul {
  list-style: none;
}

.pricing-card li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.pricing-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

.billing-clarity {
  text-align: center;
  margin-top: 2rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-family: var(--font-main);
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Multi-step form */
.form-steps {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

.form-step {
  padding: 0.5rem 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  cursor: pointer;
}

.form-step.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.form-step.completed {
  border-color: var(--color-primary);
  color: var(--color-primary);
  opacity: 0.7;
}

.form-panel {
  display: none;
}

.form-panel.active {
  display: block;
}

.form-nav {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.form-nav-right {
  display: flex;
  gap: 1rem;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin: 1rem 0;
}

.checkbox-group input {
  width: auto;
  margin-top: 0.25rem;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-medium);
  border-top: 1px solid var(--color-border);
  padding: 3rem 2rem;
  margin-top: 4rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-brand {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.footer-brand .logo-heat {
  color: var(--color-primary);
}

.footer-brand .logo-link {
  color: var(--color-accent);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1rem;
}

.footer-links a {
  color: var(--color-text-muted);
}

.footer-copy {
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

/* ===== Legal Pages ===== */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}

.legal-content h2 {
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
  color: var(--color-primary);
}

.legal-content p, .legal-content li {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.legal-content ul {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.legal-content .updated {
  color: var(--color-text-dim);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

/* Color scheme switcher (optional UI) */
.color-scheme-switcher {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  gap: 0.5rem;
  z-index: 100;
}

.color-scheme-switcher button {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  cursor: pointer;
  transition: transform var(--transition);
}

.color-scheme-switcher button:hover {
  transform: scale(1.1);
}

.color-scheme-switcher .swatch-amber { background: #f59e0b; }
.color-scheme-switcher .swatch-teal { background: #14b8a6; }
.color-scheme-switcher .swatch-violet { background: #8b5cf6; }
.color-scheme-switcher .swatch-emerald { background: #10b981; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-bg-medium);
    flex-direction: column;
    padding: 2rem;
    gap: 1rem;
    transform: translateY(-150%);
    transition: transform var(--transition);
    border-bottom: 1px solid var(--color-border);
  }
  
  .nav-links.open {
    transform: translateY(0);
  }
  
  .use-case-list {
    flex-direction: column;
  }
  
  .hero-cta {
    flex-direction: column;
  }
}