/* style.css — AgentEX1 design tokens + component styles (reworked) */

/* ============================================================
   DESIGN TOKENS — DARK-FIRST (AgentEX1 custom palette)
   ============================================================ */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  --font-display: 'Geist', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ============================================================
   DARK THEME (PRIMARY)
   ============================================================ */
:root, [data-theme="dark"] {
  --color-bg:             #0a0a0a;
  --color-surface:        #111111;
  --color-surface-2:      #161616;
  --color-surface-offset: #1a1a1a;
  --color-surface-offset-2: #202020;
  --color-surface-dynamic: #2a2a2a;
  --color-divider:        #1f1f1f;
  --color-border:         #282828;
  --color-border-subtle:  #1e1e1e;

  --color-text:           #ededed;
  --color-text-muted:     #888888;
  --color-text-faint:     #444444;
  --color-text-inverse:   #0a0a0a;

  --color-primary:        #00d4aa;
  --color-primary-hover:  #00bfa0;
  --color-primary-active: #00a88c;
  --color-primary-dim:    #00d4aa20;
  --color-primary-highlight: #00d4aa14;
  --color-primary-border: #00d4aa30;

  --color-success:        #4ade80;
  --color-success-dim:    #4ade8020;
  --color-error:          #f87171;
  --color-error-dim:      #f8717120;
  --color-warning:        #fbbf24;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 24px rgba(0,212,170,0.15);
}

/* ============================================================
   LIGHT THEME
   ============================================================ */
[data-theme="light"] {
  --color-bg:             #f8f9fa;
  --color-surface:        #ffffff;
  --color-surface-2:      #f3f4f6;
  --color-surface-offset: #eeeff1;
  --color-surface-offset-2: #e8eaec;
  --color-surface-dynamic: #dde0e3;
  --color-divider:        #e2e4e8;
  --color-border:         #d1d5db;
  --color-border-subtle:  #e5e7eb;
  --color-text:           #0d0d0d;
  --color-text-muted:     #6b7280;
  --color-text-faint:     #9ca3af;
  --color-text-inverse:   #ffffff;
  --color-primary:        #00a887;
  --color-primary-hover:  #008f72;
  --color-primary-active: #007560;
  --color-primary-dim:    #00a88714;
  --color-primary-highlight: #00a8870d;
  --color-primary-border: #00a88730;
  --color-success:        #16a34a;
  --color-success-dim:    #16a34a14;
  --color-error:          #dc2626;
  --color-error-dim:      #dc262614;
  --color-warning:        #d97706;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 24px rgba(0,168,135,0.12);
}

/* ============================================================
   GLOBAL LINK RESET
   ============================================================ */
a { color: inherit; text-decoration: none; }

/* ============================================================
   SKIP LINK
   ============================================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: #0a0a0a;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  z-index: 9999;
  transition: top 0.1s;
}
.skip-link:focus { top: var(--space-2); }

/* ============================================================
   CONTAINER
   ============================================================ */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container--narrow { max-width: var(--content-narrow); }
.container--default { max-width: var(--content-default); }

/* ============================================================
   SECTION SPACING
   ============================================================ */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}
.section--tight {
  padding-block: clamp(var(--space-10), 5vw, var(--space-20));
}

/* ============================================================
   LABEL / OVERLINE
   ============================================================ */
.label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-family: var(--font-body);
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header {
  text-align: center;
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.section-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-inline: auto;
  line-height: 1.6;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}
.btn-primary {
  background: var(--color-primary);
  color: #0a0a0a;
  border-color: var(--color-primary);
  font-weight: 600;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}
.btn-primary:active {
  transform: translateY(0);
  background: var(--color-primary-active);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}
.btn-ghost:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
  border-color: var(--color-border);
  transform: translateY(-1px);
}
.btn-ghost:active {
  transform: translateY(0);
  background: var(--color-surface-dynamic);
}
.btn-lg {
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-base);
}

/* ============================================================
   BADGES
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.2em 0.6em;
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
}
.badge-teal {
  background: var(--color-primary-dim);
  color: var(--color-primary);
  border: 1px solid var(--color-primary-border);
}

/* ============================================================
   INPUTS
   ============================================================ */
.input {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
  outline: none;
}
.input::placeholder { color: var(--color-text-faint); }
.input:focus {
  border-color: var(--color-primary-border);
  box-shadow: 0 0 0 3px var(--color-primary-dim);
}

/* ============================================================
   CODE / SYNTAX
   ============================================================ */
.tok-keyword   { color: #ff7eb6; }
.tok-string    { color: #a8ff78; }
.tok-comment   { color: #6b7280; font-style: italic; }
.tok-function  { color: #78c1f3; }
.tok-variable  { color: #ededed; }
.tok-number    { color: #ffd700; }
.tok-operator  { color: #00d4aa; }
.tok-property  { color: #c3e88d; }
.tok-type      { color: #e2a4ff; }
.tok-const     { color: #ff9f43; }
.tok-punct     { color: #888888; }
[data-theme="light"] .tok-keyword   { color: #d0266b; }
[data-theme="light"] .tok-string    { color: #2e7d32; }
[data-theme="light"] .tok-comment   { color: #9ca3af; }
[data-theme="light"] .tok-function  { color: #1565c0; }
[data-theme="light"] .tok-variable  { color: #1a1a1a; }
[data-theme="light"] .tok-property  { color: #2e7d32; }
[data-theme="light"] .tok-operator  { color: #007a60; }
[data-theme="light"] .tok-type      { color: #6a1b9a; }
[data-theme="light"] .tok-const     { color: #b45309; }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 56px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition:
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    backdrop-filter var(--transition-interactive);
}
.nav.scrolled {
  background: rgba(10,10,10,0.85);
  border-bottom-color: var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
[data-theme="light"] .nav.scrolled {
  background: rgba(248,249,250,0.85);
}
.nav-inner {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}
.nav-logo-text {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
}
.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.nav-links a:hover { color: var(--color-text); }
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* Theme toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.theme-toggle:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

/* Mobile nav */
.nav-mobile-toggle {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}
.mobile-menu {
  display: none;
  position: fixed;
  inset: 56px 0 0;
  background: var(--color-bg);
  z-index: 99;
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-4);
  border-top: 1px solid var(--color-border);
  overflow-y: auto;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
  transition: color var(--transition-interactive);
}
.mobile-menu a:hover { color: var(--color-text); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  padding-top: 100px;
  padding-bottom: clamp(var(--space-12), 6vw, var(--space-20));
  overflow: hidden;
  text-align: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  width: 600px;
  height: 400px;
  left: 50%;
  top: 60%;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse, rgba(0,212,170,0.09) 0%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}
.dot-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, var(--color-border) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.5;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-dim);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}
.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}
.hero-headline {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.05em;
  color: var(--color-text);
  margin-bottom: var(--space-5);
}
.hero-headline .accent { color: var(--color-primary); }
.hero-sub {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: 1.6;
}
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}

/* Hero code block */
.hero-code-wrapper {
  position: relative;
  max-width: 720px;
  margin-inline: auto;
  text-align: left;
}
.hero-code-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.hero-code-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.hero-code-dot:nth-child(1) { background: #ff5f57; }
.hero-code-dot:nth-child(2) { background: #febc2e; }
.hero-code-dot:nth-child(3) { background: #28c840; }
.hero-code-content {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  padding: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.8;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Hero entrance animation */
@keyframes hero-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-animate {
  animation: hero-in 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}
.hero-animate-1 { animation-delay: 0.05s; }
.hero-animate-2 { animation-delay: 0.12s; }
.hero-animate-3 { animation-delay: 0.2s; }
.hero-animate-4 { animation-delay: 0.3s; }
.hero-animate-5 { animation-delay: 0.4s; }

/* ============================================================
   PAIN POINTS
   ============================================================ */
.pain-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(360px, 100%), 1fr));
  gap: var(--space-4);
  max-width: var(--content-default);
  margin-inline: auto;
}
.pain-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  display: flex;
  gap: var(--space-4);
}
.pain-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  flex-shrink: 0;
  padding-top: 2px;
}
.pain-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.pain-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: none;
}

/* ============================================================
   MODES
   ============================================================ */
.modes-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.modes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}
.mode-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.modes-section .mode-card {
  background: var(--color-bg);
}
.mode-card:hover {
  border-color: var(--color-primary-border);
  box-shadow: 0 0 40px var(--color-primary-dim);
}
.mode-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-4);
}
.mode-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.mode-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-dim);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-lg);
  flex-shrink: 0;
  color: var(--color-primary);
}
.mode-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-1);
}
.mode-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-5);
  max-width: none;
}
.mode-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}
.mode-features li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  max-width: none;
}
.mode-features li::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
}
.mode-code {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.8;
  overflow-x: auto;
}
.modes-section .mode-code {
  background: var(--color-surface);
}
.combined-callout {
  margin-top: var(--space-8);
  padding: var(--space-6) var(--space-8);
  background: var(--color-primary-dim);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.combined-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}
.combined-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: none;
}

/* ============================================================
   PIPELINE
   ============================================================ */
.pipeline {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
}
.pipeline-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: border-color var(--transition-interactive);
  min-width: 100px;
  text-align: center;
}
.pipeline-node:hover {
  border-color: var(--color-primary-border);
  color: var(--color-text);
}
.pipeline-node svg { color: var(--color-primary); }
.pipeline-arrow {
  color: var(--color-text-faint);
  font-size: var(--text-sm);
  flex-shrink: 0;
}
.pipeline-wrapper {
  overflow-x: auto;
  padding-block: var(--space-4);
  scrollbar-width: none;
}
.pipeline-wrapper::-webkit-scrollbar { display: none; }

/* ============================================================
   CODE EXAMPLES
   ============================================================ */
.code-tabs-wrapper {
  max-width: var(--content-default);
  margin-inline: auto;
}
.code-content-area {
  margin-top: var(--space-4);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.code-file-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.code-file-icon { color: var(--color-primary); }
.code-scrollable {
  padding: var(--space-5);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Tabs */
.tabs {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-1);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab-btn {
  flex-shrink: 0;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: calc(var(--radius-lg) - var(--space-1));
  transition: background var(--transition-interactive), color var(--transition-interactive);
  font-family: var(--font-body);
}
.tab-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-dynamic);
}
.tab-btn.active {
  background: var(--color-surface-2);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}
[data-theme="light"] .tab-btn.active {
  background: var(--color-surface);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ============================================================
   FEATURES GRID
   ============================================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: var(--space-4);
}
.feature-card {
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.feature-card:hover {
  border-color: var(--color-primary-border);
  box-shadow: var(--shadow-md);
}
.feature-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.feature-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
  font-family: var(--font-display);
}
.feature-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: none;
}

/* ============================================================
   API ENDPOINTS
   ============================================================ */
.endpoints-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  max-width: var(--content-default);
  margin-inline: auto;
}
.endpoint-group {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.endpoint-group-title {
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-2);
}
.endpoint-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  transition: background var(--transition-interactive);
}
.endpoint-row:hover { background: var(--color-surface-offset); }
.method {
  display: inline-block;
  padding: 0.2em 0.5em;
  border-radius: var(--radius-sm);
  font-weight: 600;
  min-width: 48px;
  text-align: center;
  font-size: 0.7rem;
}
.method-post { background: var(--color-primary-dim); color: var(--color-primary); }
.method-get  { background: var(--color-success-dim); color: var(--color-success); }
.method-put  { background: rgba(251,191,36,0.15); color: var(--color-warning); }
.method-delete { background: var(--color-error-dim); color: var(--color-error); }
.endpoint-path { color: var(--color-text-muted); flex: 1; }
.endpoint-path strong { color: var(--color-text); }

/* ============================================================
   COMPARISON TABLE
   ============================================================ */
.comparison-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  max-width: var(--content-default);
  margin-inline: auto;
}
.comparison-header {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 0;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-2);
}
.comparison-header-cell {
  font-size: var(--text-xs);
  font-weight: 600;
  text-align: center;
  color: var(--color-text-muted);
}
.comparison-header-cell.highlight {
  color: var(--color-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}
.comparison-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 0;
  padding: var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  transition: background var(--transition-interactive);
}
.comparison-row:last-child { border-bottom: none; }
.comparison-row:hover { background: var(--color-surface-offset); }
.comparison-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
}
.comparison-cell:first-child {
  justify-content: flex-start;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}
.comparison-cell.agentex1-col { color: var(--color-primary); font-weight: 500; }

/* ============================================================
   TECH BADGES
   ============================================================ */
.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: border-color var(--transition-interactive), color var(--transition-interactive);
}
.tech-badge:hover {
  border-color: var(--color-primary-border);
  color: var(--color-text);
}

/* ============================================================
   PRICING
   ============================================================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  max-width: var(--content-wide);
  margin-inline: auto;
}
.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.pricing-card:hover {
  border-color: var(--color-primary-border);
  box-shadow: var(--shadow-md);
}
.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 40px var(--color-primary-dim), var(--shadow-md);
}
.pricing-card.featured::before {
  content: 'Most popular';
  position: absolute;
  top: calc(var(--space-4) * -1);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-1) var(--space-4);
  background: var(--color-primary);
  color: #0a0a0a;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}
.pricing-tier {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
}
.pricing-price {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-1);
  letter-spacing: -0.03em;
}
.pricing-price .period {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-muted);
}
.pricing-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.5;
}
.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  flex: 1;
}
.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}
.pricing-features li svg {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 2px;
}
.pricing-cta {
  margin-top: auto;
}
.pricing-cta .btn {
  width: 100%;
  justify-content: center;
}

/* ============================================================
   SIGNUP MODAL
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  max-width: 440px;
  width: 100%;
  position: relative;
  transform: translateY(16px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.modal-overlay.open .modal {
  transform: translateY(0);
}
.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.modal-close:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}
.modal-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}
.modal-sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.5;
}
.form-group {
  margin-bottom: var(--space-4);
}
.form-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
  outline: none;
}
.form-input::placeholder { color: var(--color-text-faint); }
.form-input:focus {
  border-color: var(--color-primary-border);
  box-shadow: 0 0 0 3px var(--color-primary-dim);
}
.form-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-5) 0;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.form-divider::before, .form-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-divider);
}
.modal-switch {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-5);
}
.modal-switch a {
  color: var(--color-primary);
  font-weight: 500;
  cursor: pointer;
}
.modal-switch a:hover {
  text-decoration: underline;
}

/* ============================================================
   CTA
   ============================================================ */
.cta-section {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: clamp(var(--space-12), 6vw, var(--space-24));
  text-align: center;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 50% 100%, var(--color-primary-dim) 0%, transparent 70%);
  pointer-events: none;
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-8);
}
.footer-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
}
.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  transition: color var(--transition-interactive);
}
.footer-links a:hover { color: var(--color-text-muted); }
.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ============================================================
   SCROLL ANIMATIONS (CSS only, progressive)
   ============================================================ */
.fade-in { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .fade-in {
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 60%;
  }
}
@keyframes reveal-fade { from { opacity: 0; } to { opacity: 1; } }

/* Glow line */
.glow-line {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-primary), transparent);
  opacity: 0.4;
  margin-block: var(--space-1);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-actions .btn { display: none; }
  .nav-mobile-toggle { display: flex; }
  .theme-toggle { display: flex; }

  .modes-grid { grid-template-columns: 1fr !important; }
  .endpoints-grid { grid-template-columns: 1fr !important; }
  .hero-code-wrapper { display: block; }
  .comparison-wrapper { overflow-x: auto; }
  .comparison-container { overflow-x: auto; }
  .comparison-header,
  .comparison-row { min-width: 560px; }
  .pipeline { gap: var(--space-1); }
  .pipeline-node { min-width: 80px; padding: var(--space-2) var(--space-3); }
  .combined-callout { flex-direction: column; gap: var(--space-4); }
  .cta-section { padding: var(--space-10) var(--space-6); }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-inline: auto;
  }
}

@media (max-width: 480px) {
  .container { padding-inline: var(--space-4); }
}