/* Base Styles — Boiled Ocean — Slate & Chalk */

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.6;
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
}

h2 {
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  margin-bottom: var(--space-lg);
}

h3 {
  font-size: clamp(1.25rem, 1rem + 1vw, 1.75rem);
  margin-bottom: var(--space-md);
}

h4 {
  font-size: clamp(1rem, 0.9rem + 0.5vw, 1.25rem);
  font-family: var(--font-sans);
  font-weight: 500;
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-muted);
  max-width: 65ch;
}

p strong {
  color: var(--text);
  font-weight: 500;
}

/* Links */
a {
  color: var(--amber);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  text-decoration: underline;
}

/* Selection */
::selection {
  background: var(--amber-wash);
  color: var(--text);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border-active);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Utility classes */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
}

/* Section base */
.section {
  padding: var(--space-xl) 0;
  position: relative;
}

/* Section divider — hairline border, no visible characters */
.section-divider {
  display: block;
  width: 100%;
  max-width: var(--max-width);
  height: 1px;
  background: var(--border);
  border: none !important;
  border-top: none !important;
  border-bottom: none !important;
  margin: 0 auto;
  padding: 0;
  -webkit-appearance: none;
  appearance: none;
}

/* Scroll progress bar — amber, 1px */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 1px;
  background: var(--amber);
  z-index: var(--z-progress);
  width: 0%;
  transition: width 50ms linear;
}

/* Status indicator dot — amber, pulsing */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* CTA Button — amber on slate */
.btn-cta {
  display: inline-block;
  padding: 0.875rem 2rem;
  background: var(--amber);
  color: var(--bg);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.btn-cta:hover {
  opacity: 0.85;
  color: var(--bg);
  text-decoration: none;
  transform: translateY(-1px);
}

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

/* Secondary button — amber outline */
.btn-outline {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  background: transparent;
  color: var(--amber);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--amber);
  border-radius: 12px;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.btn-outline:hover {
  background: var(--amber);
  color: var(--bg);
  text-decoration: none;
}

/* Card / surface — subtle background difference + hairline border */
.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-lg);
  background: var(--surface);
}

/* Agent card */
.agent-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-lg);
  background: var(--surface);
  position: relative;
}

.agent-card .status-dot {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
}

/* Form elements */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

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

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

/* Two-column grid */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* Three-column grid */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Collapsible */
.collapsible-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--amber);
  cursor: pointer;
  padding: var(--space-sm) 0;
  border: none;
  background: none;
  transition: color var(--transition-fast);
}

.collapsible-trigger:hover {
  color: var(--text);
}

.collapsible-trigger .arrow {
  display: inline-block;
  transition: transform var(--transition-base);
  font-size: 0.625rem;
}

.collapsible-trigger[aria-expanded="true"] .arrow {
  transform: rotate(90deg);
}

.collapsible-content {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-slow);
}

.collapsible-content.open {
  max-height: 2000px;
}

/* Welcome back message */
.welcome-back {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fade-in 1s ease forwards;
}

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

/* Site invert */
.site-invert-active {
  filter: invert(1);
}

/* Responsive */
@media (max-width: 767px) {
  .section {
    padding: var(--space-2xl) 0;
  }
}