/* ── Font Faces ── */
@font-face {
  font-family: 'Space Grotesk';
  src: url('../fonts/SpaceGrotesk-Variable.woff2') format('woff2');
  font-weight: 300 800;
  font-display: swap;
}

/* ── Custom Properties: Saffron and Stone ── */
:root {
  --color-bg:              #100F14;
  --color-bg-deep:         #0B0A0E;
  --color-surface:         #19181F;
  --color-surface-hover:   #211F28;
  --color-surface-alt:     #1C1B22;
  --color-text:            #E6DFD4;
  --color-text-secondary:  #B5ADA2;
  --color-text-tertiary:   #736D64;
  --color-text-muted:      #484440;
  --color-accent:          #C4873A;
  --color-accent-light:    #D89C50;
  --color-accent-dark:     #9E6C2E;
  --color-accent-subtle:   rgba(196, 135, 58, 0.12);
  --color-accent-glow:     rgba(196, 135, 58, 0.25);
  --color-secondary:       #9688B8;
  --color-secondary-hover: #A89CC8;
  --color-border:          #302E38;
  --color-border-subtle:   #262430;

  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  --text-xs:    clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm:    clamp(0.8125rem, 0.775rem + 0.25vw, 0.875rem);
  --text-base:  clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lg:    clamp(1.125rem, 1.05rem + 0.375vw, 1.25rem);
  --text-xl:    clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl:   clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --text-3xl:   clamp(2rem, 1.5rem + 2.5vw, 2.75rem);
  --text-4xl:   clamp(2.5rem, 1.8rem + 3.5vw, 3.5rem);

  --line-height-body:    1.7;
  --line-height-heading: 1.15;
  --line-height-tight:   1.3;

  --letter-spacing-tight: -0.02em;
  --letter-spacing-wide:  0.05em;
  --letter-spacing-caps:  0.08em;

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

  --container-max: 1200px;
  --content-max:   720px;
  --container-pad: clamp(1rem, 2vw + 0.5rem, 2.5rem);

  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  --ease-out:        cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-base: 250ms var(--ease-out);
  --transition-slow: 400ms var(--ease-out);

  --shadow-card: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-lift: 0 4px 12px rgba(0,0,0,0.4), 0 2px 4px rgba(0,0,0,0.2);
  --shadow-glow: 0 0 20px var(--color-accent-glow);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-accent-light); }

/* ── Skip Link ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent);
  color: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  z-index: 200;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: var(--space-2); }

/* ── Header ── */
.header-wrap {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(16, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
}
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 max(var(--container-pad), env(safe-area-inset-right)) 0 max(var(--container-pad), env(safe-area-inset-left));
  max-width: var(--container-max);
  margin: 0 auto;
}
.wordmark {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}
.wordmark span { color: var(--color-accent); }
.wordmark a { color: inherit; }
.wordmark a:hover { color: inherit; }
.nav-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}
.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: 400;
}
.nav-links a:hover { color: var(--color-accent); }
.nav-links a.active { color: var(--color-accent); }

/* Essays dropdown (desktop) */
.nav-dropdown {
  position: relative;
}
.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0;
  transition: color var(--transition-fast);
}
.nav-dropdown-trigger:hover {
  color: var(--color-accent);
}
.nav-dropdown-chevron {
  color: var(--color-text-tertiary);
  transition: color var(--transition-fast), transform var(--transition-fast);
  flex-shrink: 0;
}
.nav-dropdown-trigger:hover .nav-dropdown-chevron,
.nav-dropdown.open .nav-dropdown-chevron {
  color: var(--color-accent);
}
.nav-dropdown.open .nav-dropdown-chevron {
  transform: rotate(180deg);
}
.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 4px;
  min-width: 160px;
  padding: var(--space-2) 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lift);
  list-style: none;
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
}
.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown-menu a {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.nav-dropdown-menu a:hover {
  color: var(--color-accent);
  background: var(--color-surface-hover);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px; /* 24px icon + 20px padding = 44px min touch target */
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: all var(--transition-base);
}
.nav-mobile { display: none; }
@media (max-width: 767px) {
  .nav-links { display: none; }
  .hamburger { display: block; }
  .nav-mobile {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border-subtle);
    padding: var(--space-4) var(--container-pad);
  }
  .nav-mobile.open { display: flex; flex-direction: column; gap: var(--space-4); }
  .nav-mobile a {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    padding: var(--space-2) 0;
  }
  .nav-mobile-dropdown {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
  }
  .nav-mobile-dropdown-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    font-family: inherit;
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: var(--space-2) 0;
    text-align: left;
  }
  .nav-mobile-dropdown-trigger:hover {
    color: var(--color-accent);
  }
  .nav-mobile-dropdown-trigger[aria-expanded="true"] .nav-dropdown-chevron {
    color: var(--color-accent);
    transform: rotate(180deg);
  }
  .nav-mobile-dropdown-menu {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding-left: var(--space-4);
  }
  .nav-mobile-dropdown-menu[hidden] {
    display: none;
  }
  .nav-mobile-dropdown-menu a {
    font-size: var(--text-sm);
    padding: var(--space-1) 0;
  }
}

/* ── Hero (split layout) ── */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--container-pad) var(--space-4);
  overflow: visible;
  background: var(--color-bg);
  background-image:
    radial-gradient(ellipse 80% 60% at 30% 50%, rgba(196, 135, 58, 0.05) 0%, transparent 70%),
    radial-gradient(circle at 85% 60%, rgba(150, 136, 184, 0.03) 0%, transparent 40%);
}
@media (min-width: 768px) {
  .hero {
    height: calc(100vh - 64px);
    height: calc(100dvh - 64px);
    padding: var(--space-8) var(--container-pad) var(--space-16);
  }
}
.hero-split {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
}
@media (min-width: 768px) {
  .hero-split {
    flex-direction: row;
    align-items: center;
    gap: var(--space-12);
    flex: 1;
    min-height: 0;
  }
}
.hero-text {
  flex: 1 1 55%;
  min-width: 0;
}
.hero-text h1 {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: var(--line-height-heading);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
@media (min-width: 768px) {
  .hero-text h1 { margin-bottom: var(--space-6); }
}
.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  max-width: 48ch;
  margin-bottom: var(--space-4);
  line-height: var(--line-height-tight);
}
@media (min-width: 768px) {
  .hero-subtitle { margin-bottom: var(--space-6); }
}
.hero-supporting {
  font-size: var(--text-lg);
  color: var(--color-text-tertiary);
  max-width: 52ch;
  margin-bottom: var(--space-4);
  line-height: var(--line-height-body);
}
@media (min-width: 768px) {
  .hero-supporting { margin-bottom: var(--space-8); }
}
.stat-pills {
  display: none;
  flex-wrap: wrap;
  gap: var(--space-3);
}
@media (min-width: 768px) {
  .stat-pills { display: flex; }
}
.stat-pill {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-wide);
  white-space: nowrap;
}

/* Hero phone container */
.hero-image {
  flex: 0 0 auto;
  display: flex;
  justify-content: center;
  width: 100%;
  max-width: 260px;
}
@media (min-width: 768px) {
  .hero-image {
    width: auto;
    max-width: none;
    align-self: stretch;
    padding: var(--space-4) 0;
  }
}
.hero-phone {
  width: 100%;
}
@media (min-width: 768px) {
  .hero-phone {
    width: auto;
    height: 100%;
  }
}
.hero-phone-frame {
  position: relative;
  aspect-ratio: 9 / 19.5;
  background: #2A2830;
  border-radius: 36px;
  padding: 8px;
  box-shadow:
    inset 0 0 0 1px rgba(255,255,255,0.06),
    0 20px 60px rgba(0,0,0,0.5),
    0 4px 16px rgba(0,0,0,0.3),
    0 0 40px rgba(196, 135, 58, 0.06);
  /* Mobile: width-driven */
  width: 100%;
}
@media (min-width: 768px) {
  .hero-phone-frame {
    /* Desktop: height-driven, width derives from aspect-ratio */
    width: auto;
    height: 100%;
  }
}
.hero-phone-island {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 72px;
  height: 22px;
  background: #1C1B20;
  border-radius: 14px;
  z-index: 10;
}
.hero-phone-screen {
  width: 100%;
  height: 100%;
  background: var(--color-bg);
  border-radius: 28px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.hero-phone-home {
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 4px;
  background: rgba(255,255,255,0.12);
  border-radius: 2px;
  z-index: 10;
}

/* Hero phone screen layers (stacked for crossfade) */
.hero-phone-screen { position: relative; }
.hero-screen-data,
.hero-screen-chat {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 28px;
}
.hero-screen-data {
  z-index: 2;
  background: var(--color-bg);
  animation: heroDataOut 600ms ease-in 1.5s forwards;
}
.hero-screen-chat {
  z-index: 1;
  background: var(--color-bg);
  opacity: 0;
  animation: heroScreenFadeIn 500ms var(--ease-out) 1.8s forwards;
}
@keyframes heroScreenFadeIn {
  to { opacity: 1; }
}
@keyframes heroDataOut {
  to { opacity: 0; pointer-events: none; }
}

/* Hero data screen */
.hero-data-header {
  padding: 42px 20px 12px;
  text-align: center;
  border-bottom: 1px solid var(--color-border-subtle);
}
.hero-data-wordmark {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}
.hero-data-wordmark span { color: var(--color-accent); }
.hero-data-body {
  flex: 1;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
}
.hero-data-stat {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  line-height: 1;
}
.hero-data-progress {
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-data-bar {
  flex: 1;
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 3px;
  overflow: hidden;
}
.hero-data-fill {
  width: 10.55%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent-dark), var(--color-accent));
  border-radius: 3px;
}
.hero-data-pct {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}
.hero-data-label {
  font-size: 12px;
  color: var(--color-text-muted);
  text-align: center;
}
.hero-data-tabs {
  display: flex;
  gap: 20px;
  justify-content: center;
  padding-top: 4px;
}
.hero-data-tab {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  padding-bottom: 4px;
}
.hero-data-tab.active {
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
}
.hero-data-heatmap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hero-hm-row {
  display: flex;
  align-items: center;
  gap: 3px;
}
.hero-hm-yr {
  font-size: 11px;
  color: var(--color-text-muted);
  width: 34px;
  text-align: right;
  flex-shrink: 0;
}
.hero-hm-row span:not(.hero-hm-yr) {
  flex: 1;
  aspect-ratio: 1;
  border-radius: 3px;
}
.h0 { background: #1E1A14; }
.h1 { background: #4A3820; }
.h2 { background: #7A5C30; }
.h3 { background: var(--color-accent); }
.h4 { background: #DEA454; }
.hero-data-records {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: auto;
}
.hero-data-rec {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 14px;
}
.hero-data-rec span:first-child {
  color: var(--color-text-muted);
}
.hero-data-rec span:last-child {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text);
}
.hero-data-rec.highlight span:last-child {
  color: var(--color-accent);
}

/* Hero chat header */
.hero-chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 42px 20px 14px;
  border-bottom: 1px solid var(--color-border-subtle);
}
.hero-chat-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
}
.hero-chat-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(196, 135, 58, 0.5);
}

/* Hero chat messages */
.hero-chat-messages {
  flex: 1;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow: hidden;
}
.hero-chat-msg {
  opacity: 0;
  transform: translateY(8px);
}
.hero-chat-msg.user { align-self: flex-end; max-width: 78%; }
.hero-chat-msg.ai { align-self: flex-start; max-width: 100%; }
.hero-chat-bubble {
  font-size: 16px;
  line-height: 1.5;
  padding: 12px 14px;
  border-radius: 12px;
}
.hero-chat-msg.user .hero-chat-bubble {
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  border-radius: 12px 12px 3px 12px;
}
.hero-chat-msg.ai .hero-chat-bubble {
  background: transparent;
  color: var(--color-text-secondary);
  padding: 0 0 12px 0;
  border-bottom: 1px solid var(--color-border-subtle);
  border-radius: 0;
  font-size: 16px;
  line-height: 1.5;
}

/* Hero chat input mock */
.hero-chat-input {
  padding: 12px 18px 24px;
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-bg);
}
.hero-chat-input span {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 15px;
  color: var(--color-text-muted);
}

/* Hero chat animation: messages appear after data-to-chat crossfade */
.hero-msg-1 { animation: heroMsgIn 400ms var(--ease-out) 2.8s forwards; }
.hero-msg-2 { animation: heroMsgIn 400ms var(--ease-out) 4.0s forwards; }
.hero-msg-3 { animation: heroMsgIn 400ms var(--ease-out) 5.5s forwards; }
.hero-msg-4 { animation: heroMsgIn 400ms var(--ease-out) 7.5s forwards; }
.hero-msg-5 { animation: heroMsgIn 400ms var(--ease-out) 9.5s forwards; }
.hero-msg-6 { animation: heroMsgIn 400ms var(--ease-out) 12.0s forwards; }
.hero-msg-7 { animation: heroMsgIn 400ms var(--ease-out) 14.0s forwards; }
@keyframes heroMsgIn {
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll indicator — hidden on mobile, visible on desktop */
.scroll-indicator {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding-top: var(--space-6);
  animation: scrollPulseMobile 3s ease-in-out infinite;
}
@media (min-width: 768px) {
  .scroll-indicator {
    display: flex;
    position: absolute;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    padding-top: 0;
    animation: scrollPulse 3s ease-in-out infinite;
  }
}
.scroll-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: var(--letter-spacing-caps);
  text-transform: uppercase;
}
.scroll-indicator svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-accent);
  stroke-width: 2;
  fill: none;
}
@keyframes scrollPulseMobile {
  0%, 100% { opacity: 0.7; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(4px); }
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.7; transform: translateX(-50%) translateY(0); }
  50% { opacity: 1; transform: translateX(-50%) translateY(4px); }
}

/* ── Mountain Divider ── */
.mountain-divider {
  width: 100%;
  height: 48px;
  overflow: hidden;
  line-height: 0;
}
.mountain-divider svg { width: 100%; height: 100%; }

/* ── Section Base ── */
.section { padding: var(--space-16) var(--container-pad); }
@media (min-width: 768px) {
  .section { padding: var(--space-24) var(--container-pad); }
}
.section-inner { max-width: var(--container-max); margin: 0 auto; }
.section-narrow { max-width: var(--content-max); margin: 0 auto; }
.section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  letter-spacing: var(--letter-spacing-tight);
}

/* ── Essay Cards (index page) ── */
.essays { background: var(--color-bg); }
.essay-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
@media (min-width: 768px) {
  .essay-grid { grid-template-columns: repeat(3, 1fr); }
}
.essay-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  color: inherit;
}
.essay-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
  border-color: var(--color-accent);
  color: inherit;
}
.essay-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  line-height: var(--line-height-tight);
}
.essay-card .excerpt {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-body);
  flex: 1;
}
.essay-subtitle {
  font-weight: 400;
  font-style: italic;
  color: var(--color-text-secondary);
  margin-top: -0.5rem;
  margin-bottom: 2rem;
}
.essay-card .read-link.btn-outline {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  background: transparent;
  border: 1px solid var(--color-accent);
  border-radius: 6px;
  padding: 0.45rem 1.1rem;
  transition: background 0.2s, color 0.2s;
  margin-top: auto;
}
.essay-card:hover .read-link.btn-outline {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* ── How It Works (index section) ── */
.how-it-works { background: var(--color-surface-alt); }
.how-it-works p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: var(--line-height-body);
}
.section-link {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-accent);
}

/* ── Dashboard ── */
.dashboard { background: var(--color-surface-alt); }
.dashboard h2 { text-align: center; }
.dashboard-subtitle {
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: var(--text-base);
  margin-top: calc(var(--space-4) * -1);
  margin-bottom: var(--space-10);
}
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  max-width: 1080px;
  margin: 0 auto;
}
.dashboard-grid-3 {
  grid-template-columns: repeat(3, 1fr);
  max-width: 840px;
}
@media (max-width: 1023px) {
  .dashboard-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-8); }
  .dashboard-grid-3 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 767px) {
  .dashboard-grid-3 { grid-template-columns: 1fr; max-width: 260px; }
}
@media (max-width: 567px) {
  .dashboard-grid { grid-template-columns: 1fr; max-width: 280px; }
}

/* Device frame */
.device-wrap { display: flex; flex-direction: column; align-items: center; }
.device {
  position: relative;
  width: 100%;
  max-width: 240px;
  aspect-ratio: 9 / 19.5;
  background: #2A2830;
  border-radius: 28px;
  padding: 8px;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.06),
    0 8px 32px rgba(0,0,0,0.5),
    0 2px 8px rgba(0,0,0,0.3);
}
.device-notch {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 22px;
  background: #2A2830;
  border-radius: 0 0 14px 14px;
  z-index: 5;
}
.device-screen {
  width: 100%;
  height: 100%;
  background: var(--color-bg);
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.device-label {
  margin-top: var(--space-4);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: var(--letter-spacing-caps);
  text-align: center;
}

/* Mock header (inside device) */
.mock-header {
  padding: 28px 12px 6px;
  text-align: center;
}
.mock-wordmark {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.mock-wordmark span { color: var(--color-accent); }

/* Mock body */
.mock-body {
  flex: 1;
  padding: 10px 10px 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* ── HOME screen mock ── */
.mock-hero-stat {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  line-height: 1;
  margin-top: 4px;
  margin-bottom: 6px;
}
.mock-hero-divider {
  width: 32px;
  height: 1px;
  background: rgba(255,255,255,0.15);
  margin: 0 auto 4px;
}
.mock-progress-label {
  font-size: 9px;
  color: var(--color-accent);
  font-weight: 600;
  text-align: center;
  margin-bottom: 4px;
}
.mock-progress-bar-row {
  padding: 0 2px;
  margin-bottom: 2px;
}
.mock-progress-bar {
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
}
.mock-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent-dark), var(--color-accent));
  border-radius: 2px;
}
.mock-location {
  font-size: 7px;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 2px;
  margin-bottom: 6px;
}
.mock-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: 8px;
  padding: 10px 10px 8px;
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.mock-card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
}
.mock-card-title {
  font-size: 7px;
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: 0.08em;
}
.mock-card-date {
  font-size: 6px;
  color: var(--color-text-muted);
}
.mock-week-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  text-align: center;
  margin-bottom: 6px;
}
.mock-week-stat { display: flex; flex-direction: column; align-items: center; }
.mock-stat-val {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1.1;
}
.mock-stat-label {
  font-size: 6px;
  color: var(--color-text-muted);
  margin-top: 1px;
}
.mock-week-meta {
  font-size: 5.5px;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

/* Daily rows (PWA-faithful) */
.mock-daily-rows {
  display: flex;
  flex-direction: column;
  gap: 0;
  flex: 1;
}
.mock-daily-row {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 5.5px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.mock-daily-row:last-child { border-bottom: none; }
.mock-daily-day {
  width: 16px;
  font-size: 6px;
  font-weight: 600;
  color: var(--color-text-muted);
  flex-shrink: 0;
}
.mock-type-dots {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
  align-items: center;
  width: 22px;
}
.mock-tdot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  flex-shrink: 0;
}
.mock-tdot.walk { background: var(--color-accent); }
.mock-tdot.run { background: var(--color-secondary); }
.mock-tdot.hike { background: #6A9878; }
.mock-daily-bar-wrap {
  flex: 1;
  min-width: 0;
  height: 8px;
  background: rgba(255,255,255,0.04);
  border-radius: 4px;
  overflow: hidden;
}
.mock-daily-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent-dark), var(--color-accent));
  border-radius: 4px;
}
.mock-daily-nums {
  flex-shrink: 0;
  text-align: right;
  font-size: 5.5px;
  white-space: nowrap;
}
.mock-daily-nums .mi { color: var(--color-text-secondary); }
.mock-daily-nums .lu { color: var(--color-accent); font-weight: 600; }

/* ── Bottom nav bar (all screens) ── */
.mock-nav {
  display: flex;
  align-items: center;
  justify-content: space-evenly;
  padding: 6px 0 4px;
  border-top: 1px solid rgba(255,255,255,0.05);
  background: var(--color-bg);
  flex-shrink: 0;
}
.mock-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  font-size: 5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}
.mock-nav-item svg { width: 10px; height: 10px; }
.mock-nav-item.active { color: var(--color-accent); }
.mock-nav-item.active svg { stroke: var(--color-accent); }
.mock-nav-item.hanq { color: var(--color-accent); }

/* ── DATA screen mock ── */
.mock-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 4px;
}
.mock-tab {
  font-size: 8px;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  padding-bottom: 3px;
}
.mock-tab.active {
  color: var(--color-accent);
  border-bottom: 1.5px solid var(--color-accent);
}
.mock-heatmap { margin-bottom: 4px; }
.mock-heatmap-months {
  display: flex;
  gap: 0;
  padding-left: 26px;
  margin-bottom: 2px;
}
.mock-heatmap-months span {
  flex: 1;
  font-size: 5px;
  color: var(--color-text-muted);
  text-align: center;
}
.mock-heatmap-row {
  display: flex;
  align-items: center;
  gap: 1px;
  margin-bottom: 1px;
}
.mock-year {
  font-size: 6px;
  color: var(--color-text-muted);
  width: 24px;
  text-align: right;
  padding-right: 2px;
}
.mock-cells {
  display: flex;
  gap: 1px;
  flex: 1;
}
.mock-cells span {
  flex: 1;
  aspect-ratio: 1;
  border-radius: 2px;
}
.mock-cells .c0 { background: rgba(255,255,255,0.02); }
.mock-cells .c1 { background: #1E1A14; }
.mock-cells .c2 { background: #4A3820; }
.mock-cells .c3 { background: #7A5C30; }
.mock-cells .c4 {
  background: var(--color-accent);
  box-shadow: 0 0 6px rgba(196,135,58,0.2);
}

/* Dual-column stats (MILES / LOAD) */
.mock-dual-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 4px;
}
.mock-dual-col { display: flex; flex-direction: column; }
.mock-dual-title {
  font-size: 6px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  padding-bottom: 3px;
  margin-bottom: 3px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.mock-dual-stat {
  display: flex;
  flex-direction: column;
  padding: 3px 0;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.mock-dual-stat:last-child { border-bottom: none; }
.mock-dual-label {
  font-size: 5.5px;
  color: var(--color-text-muted);
  margin-bottom: 1px;
}
.mock-dual-value {
  font-family: var(--font-display);
  font-size: 9px;
  font-weight: 600;
  color: var(--color-text);
}
.mock-dual-value.highlight { color: var(--color-accent); }
.mock-dual-value.secondary { color: var(--color-secondary); }

/* Type breakdown */
.mock-type-section { margin-top: 2px; }
.mock-type-title {
  font-size: 6px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  padding-bottom: 3px;
  margin-bottom: 2px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.mock-type-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 3px 0;
  font-size: 7px;
}
.mock-type-name { color: var(--color-text); font-weight: 500; flex-shrink: 0; }
.mock-type-mi { color: var(--color-text); margin-left: auto; }
.mock-type-lu { color: var(--color-secondary); }
.mock-type-mult { color: var(--color-text-muted); font-size: 6px; }

/* ── SYNC screen mock ── */
.mock-sync-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  padding: 12px 8px;
  text-align: center;
  margin-bottom: 6px;
}
.mock-sync-icon-wrap {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(196,135,58,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 6px;
}
.mock-sync-icon-wrap svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent);
}
.mock-sync-title {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}
.mock-sync-subtitle {
  font-size: 6px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}
.mock-sync-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent-dark), var(--color-accent));
  color: #fff;
  font-size: 8px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 5px;
}

/* Sync result (success state) */
.mock-sync-result {
  background: rgba(196,135,58,0.08);
  border: 1px solid rgba(196,135,58,0.2);
  border-radius: 8px;
  padding: 10px 10px;
  text-align: center;
  color: var(--color-accent);
  font-size: 7px;
  line-height: 1.6;
  margin-bottom: 8px;
}
.mock-result-number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  display: block;
  margin-bottom: 2px;
  line-height: 1.2;
}

/* Connection card */
.mock-connection-label {
  font-size: 6px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin-bottom: 4px;
  padding-left: 2px;
}
.mock-status-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  padding: 6px 8px;
}
.mock-status-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 4px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.mock-status-row:last-child { border-bottom: none; }
.mock-status-label {
  font-size: 6px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}
.mock-status-value {
  font-size: 7px;
  font-weight: 500;
  color: var(--color-text-secondary);
}
.mock-status-value.ok { color: var(--color-accent); }

/* ── About ── */
.about { background: var(--color-bg); }
.about blockquote {
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-subtle);
  padding: var(--space-6);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: var(--space-8);
}
.about blockquote p {
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text);
  line-height: var(--line-height-body);
}
.about .about-text p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: var(--line-height-body);
}

/* ── Footer ── */
.site-footer {
  padding: var(--space-12) var(--container-pad) var(--space-8);
  text-align: center;
}
.footer-cta {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}
.footer-cta a { color: var(--color-accent); font-weight: 500; }
.footer-copyright {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ══════════════════════════════════════════
   Essay Pages
   ══════════════════════════════════════════ */

.essay-page {
  padding: var(--space-16) var(--container-pad) var(--space-24);
}
@media (min-width: 768px) {
  .essay-page { padding: var(--space-20) var(--container-pad) var(--space-24); }
}
.essay-page article {
  max-width: var(--content-max);
  margin: 0 auto;
}

/* Essay header */
.essay-header {
  margin-bottom: var(--space-8);
}
.essay-header h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: var(--line-height-heading);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.essay-byline {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}
.essay-date {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.essay-tagline {
  font-size: var(--text-sm);
  font-style: italic;
  color: var(--color-text-tertiary);
  line-height: var(--line-height-body);
  margin-bottom: var(--space-4);
}
.essay-divider {
  border: none;
  height: 1px;
  background: var(--color-border-subtle);
  margin: var(--space-8) 0;
}

/* Essay body content */
.essay-body h2 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: var(--letter-spacing-wide);
  margin-top: var(--space-12);
  margin-bottom: var(--space-6);
}
.essay-body p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-body);
  margin-bottom: var(--space-6);
}
.essay-body blockquote {
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-subtle);
  padding: var(--space-4) var(--space-6);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--space-6) 0;
}
.essay-body blockquote p {
  font-style: italic;
  color: var(--color-text);
  margin-bottom: 0;
}
.essay-body em {
  font-style: italic;
}

/* Essay sources */
.essay-sources {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
}
.essay-sources p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: var(--line-height-body);
  margin-bottom: var(--space-3);
}

/* Essay colophon */
.essay-colophon {
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  font-style: italic;
  color: var(--color-text-tertiary);
  line-height: var(--line-height-body);
}

/* Essay navigation */
.essay-nav {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-top: var(--space-12);
}
.essay-nav-back {
  display: block;
  text-align: center;
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-accent);
}
.essay-nav-links {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
}
.essay-nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}
.essay-nav-links a:hover { color: var(--color-accent); }
.essay-nav-links .nav-prev { margin-right: auto; text-align: left; }
.essay-nav-links .nav-next { margin-left: auto; text-align: right; }

/* ══════════════════════════════════════════
   How RadPed Works Page
   ══════════════════════════════════════════ */

.explainer-page {
  padding: var(--space-16) var(--container-pad) var(--space-24);
}
@media (min-width: 768px) {
  .explainer-page { padding: var(--space-20) var(--container-pad) var(--space-24); }
}
.explainer-page h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: var(--line-height-heading);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
  margin-bottom: var(--space-8);
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
}
.explainer-intro {
  max-width: var(--content-max);
  margin: 0 auto var(--space-12);
}
.explainer-intro p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-body);
  margin-bottom: var(--space-6);
}

/* Component cards grid */
.component-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: var(--container-max);
  margin: 0 auto var(--space-12);
}
@media (min-width: 768px) {
  .component-grid { grid-template-columns: repeat(2, 1fr); }
}
.component-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.component-card h2 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.component-card p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-body);
  margin-bottom: var(--space-4);
}
.component-card p:last-child { margin-bottom: 0; }

.explainer-closing {
  max-width: var(--content-max);
  margin: 0 auto;
}
.explainer-closing p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-body);
  margin-bottom: var(--space-6);
}