/* ================================================
   PIXCHORD — LANDING PAGE STYLES
   Dark-first, violet accent (#8b5cf6), Inter + Instrument Serif
   Matches the Swift app design system exactly.
   ================================================ */

/* ---- TOKENS ---- */
:root {
  /* Type */
  --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, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  /* Spacing */
  --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;

  /* Radii */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --t: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Fonts */
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Instrument Serif', Georgia, serif;

  /* Content width */
  --content: 1100px;
  --content-narrow: 720px;
}

/* ---- DARK PALETTE (default + explicit dark) ---- */
/* Matches the actual PixChord iOS app: pure black bg, hot pink/magenta accent */
:root,
[data-theme="dark"] {
  --bg:          #000000;
  --surface:     #111111;
  --surface-2:   #1a1a1a;
  --surface-3:   #222222;
  --border:      #2a2a2a;
  --border-2:    #333333;

  --text:        #ffffff;
  --text-muted:  #888888;
  --text-faint:  #444444;

  /* Hot pink/magenta — matches app's primary accent */
  --accent:      #d946ef;
  --accent-hover:#e879f9;
  --accent-dim:  rgba(217, 70, 239, 0.15);
  --accent-glow: rgba(217, 70, 239, 0.3);
  /* Gradient matching the app's "Buy Credits" / Sign-in button */
  --accent-gradient: linear-gradient(135deg, #d946ef 0%, #ec4899 50%, #f43f5e 100%);

  --shadow-sm:   0 1px 3px rgba(0,0,0,0.6);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.7);
  --shadow-lg:   0 12px 40px rgba(0,0,0,0.8);
}

/* ---- LIGHT PALETTE ---- */
[data-theme="light"] {
  --bg:          #f9f9f9;
  --surface:     #ffffff;
  --surface-2:   #f2f2f2;
  --surface-3:   #e8e8e8;
  --border:      #e0e0e0;
  --border-2:    #d0d0d0;

  --text:        #0a0a0a;
  --text-muted:  #555555;
  --text-faint:  #aaaaaa;

  --accent:      #c026d3;
  --accent-hover:#a21caf;
  --accent-dim:  rgba(192, 38, 211, 0.1);
  --accent-glow: rgba(192, 38, 211, 0.2);
  --accent-gradient: linear-gradient(135deg, #c026d3 0%, #db2777 50%, #e11d48 100%);

  --shadow-sm:   0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:   0 12px 40px rgba(0,0,0,0.12);
}

/* ---- BASE RESET ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  min-height: 100dvh;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; height: auto; }
h1,h2,h3,h4 { text-wrap: balance; line-height: 1.15; }
p, li { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
ul { list-style: none; }

/* ---- CONTAINER ---- */
.container {
  width: 100%;
  max-width: var(--content);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
}

/* ---- BUTTONS ---- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--accent-gradient);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: opacity var(--t), transform var(--t), box-shadow var(--t);
  box-shadow: 0 0 24px var(--accent-glow);
  white-space: nowrap;
}
.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 0 40px var(--accent-glow);
}
.btn-primary.btn-large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: var(--text-sm);
  font-weight: 600;
  transition: opacity var(--t);
}
.btn-ghost:hover { opacity: 0.8; }

/* ---- SECTION LABELS ---- */
.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-3);
}
.section-heading {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}
.section-desc {
  color: var(--text-muted);
  max-width: 60ch;
  margin-bottom: var(--space-10);
  font-size: var(--text-base);
}
.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

/* ======== NAV ======== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  padding-block: var(--space-4);
  transition: background var(--t), backdrop-filter var(--t), box-shadow var(--t);
}
.nav--scrolled {
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  max-width: var(--content);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: -0.01em;
  flex-shrink: 0;
  transition: opacity var(--t);
}
.nav-logo:hover { opacity: 0.8; }
.nav-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
}
.nav-wordmark { color: var(--text); }
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-left: auto;
}
.nav-links a {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: 500;
  transition: color var(--t);
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background: var(--accent-gradient);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: opacity var(--t), transform var(--t);
  flex-shrink: 0;
}
.nav-cta:hover { opacity: 0.85; transform: translateY(-1px); }

/* ======== HERO ======== */
.hero {
  position: relative;
  padding-top: clamp(var(--space-12), 8vw, var(--space-20));
  padding-bottom: clamp(var(--space-10), 6vw, var(--space-16));
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  max-width: var(--content);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
  align-items: center;
  gap: var(--space-10);
}
.hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  margin-bottom: var(--space-6);
}
.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 6px #22c55e;
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.hero-heading {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: var(--space-5);
  line-height: 1.1;
}
.hero-heading em {
  /* no longer used */
}
.hero-sub {
  font-size: var(--text-lg);
  color: var(--text-muted);
  max-width: 52ch;
  margin-bottom: var(--space-8);
  line-height: 1.65;
}
.hero-sub strong { color: var(--text); font-weight: 600; }
.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}
.hero-free-note {
  font-size: var(--text-xs);
  color: var(--text-faint);
}

/* ---- HERO PHONE FRAMES (real screenshots) ---- */
.hero-phone-single {
  display: none;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-phone-frame {
  border-radius: 44px;
  overflow: hidden;
  border: 1.5px solid rgba(255,255,255,0.1);
  box-shadow: 0 24px 80px rgba(0,0,0,0.7), 0 0 60px var(--accent-glow);
}
.hero-phone-frame img {
  display: block;
  width: 240px;
  height: auto;
  border-radius: 42px;
}

/* ---- SCREENSHOTS SHOWCASE ---- */
.screenshots-section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
  background: var(--surface);
}
.screenshots-row {
  display: flex;
  gap: var(--space-8);
  justify-content: center;
  flex-wrap: wrap;
}
.screenshot-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}
.phone-showcase {
  border-radius: 40px;
  overflow: hidden;
  border: 1.5px solid rgba(255,255,255,0.08);
  box-shadow: 0 16px 48px rgba(0,0,0,0.6), 0 0 30px var(--accent-glow);
  transition: transform var(--t), box-shadow var(--t);
}
.phone-showcase:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 24px 64px rgba(0,0,0,0.7), 0 0 50px var(--accent-glow);
}
.phone-showcase img {
  display: block;
  width: 220px;
  height: auto;
  border-radius: 38px;
}
.screenshot-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ======== HOW IT WORKS ======== */
.how-preview { background: var(--bg); }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}
.step-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  position: relative;
  transition: border-color var(--t), box-shadow var(--t);
}
.step-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 24px var(--accent-dim);
}
.step-num {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}
.step-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-dim);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: var(--space-4);
}
.step-card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--space-2);
}
.step-card p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.65;
}
.how-cta { text-align: center; }

/* ======== FEATURE SECTION ======== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 6vw, var(--space-20));
  align-items: center;
}
.feature-text .section-heading { margin-bottom: var(--space-4); }
.feature-text p {
  color: var(--text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}
.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.feature-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-muted);
}
.feature-list svg {
  color: var(--accent);
  flex-shrink: 0;
}

/* Analysis card */
.analysis-card {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md), 0 0 40px var(--accent-dim);
}
.analysis-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}
.analysis-photo-thumb {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  object-fit: cover;
  flex-shrink: 0;
}
.analysis-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text);
}
.analysis-sub {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 2px;
}
.analysis-params {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.param-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
}
.param-label { color: var(--text-muted); }
.param-val {
  color: var(--text);
  font-weight: 500;
  background: var(--surface-2);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
}
.analysis-generating {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--accent-dim);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--accent);
}
.gen-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 1.2s ease-in-out infinite;
  flex-shrink: 0;
}

/* ======== PRICING ======== */
.pricing-section { background: var(--surface); }
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.price-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-5);
  position: relative;
  transition: border-color var(--t), box-shadow var(--t);
}
.price-card:hover {
  border-color: var(--border-2);
  box-shadow: var(--shadow-sm);
}
.price-card.price-popular {
  border-color: var(--accent);
  background: var(--surface-2);
  box-shadow: 0 0 32px var(--accent-dim);
}
.price-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}
.price-name {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}
.price-amount {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-1);
  line-height: 1;
}
.price-amount span {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-muted);
}
.price-credits {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent);
  margin-bottom: var(--space-2);
}
.price-note {
  font-size: var(--text-xs);
  color: var(--text-muted);
}
.pricing-footnote {
  font-size: var(--text-xs);
  color: var(--text-faint);
  text-align: center;
}

/* ======== DOWNLOAD CTA ======== */
.download-section {
  text-align: center;
  overflow: hidden;
}
.download-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}
.download-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 65%);
  pointer-events: none;
}
.download-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  box-shadow: var(--shadow-md), 0 0 40px var(--accent-dim);
}
.download-heading {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
}
.download-sub {
  font-size: var(--text-base);
  color: var(--text-muted);
}
.coming-soon-note {
  font-size: var(--text-xs);
  color: var(--text-faint);
}

/* ======== FOOTER ======== */
.footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-8);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  text-align: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-muted);
}
.footer-brand img { border-radius: 6px; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4) var(--space-6);
}
.footer-links a {
  font-size: var(--text-xs);
  color: var(--text-muted);
  transition: color var(--t);
}
.footer-links a:hover { color: var(--text); }
.footer-copy {
  font-size: var(--text-xs);
  color: var(--text-faint);
}

/* ======== RESPONSIVE ======== */
@media (min-width: 900px) {
  .hero-inner { grid-template-columns: 1fr 260px; }
  .hero-phone-single { display: flex; }
  .hero-content { max-width: 100%; }
}

@media (max-width: 760px) {
  .feature-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 500px) {
  .pricing-grid { grid-template-columns: 1fr 1fr; }
  .hero-heading { font-size: clamp(2rem, 8vw, 3.5rem); }
}

/* ---- reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}