/* PolyClerk — Dark Fintech Teaser */

/* ── Tokens ── */
:root {
  /* Type scale */
  --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;

  /* Dark-only palette */
  --color-bg:          #0a0e13;
  --color-surface:     #111820;
  --color-surface-2:   #161e28;
  --color-border:      #1e2a38;
  --color-text:        #c8cdd4;
  --color-text-muted:  #6b7a8d;
  --color-text-faint:  #3d4f63;
  --color-primary:     #4f98a3;
  --color-primary-hover: #3dd4e6;
  --color-secondary:   #8b5cf6;
  --color-secondary-hover: #a78bfa;
  --color-success:     #34d399;
  --color-error:       #f87171;

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

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 12px 40px oklch(0 0 0 / 0.5);
  --shadow-glow: 0 0 40px oklch(from var(--color-primary) l c h / 0.15);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Fonts */
  --font-display: 'JetBrains Mono', 'Courier New', monospace;
  --font-body: 'Geist', 'Inter', 'Helvetica Neue', sans-serif;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
  box-sizing: border-box;
}

/* ── Header ── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: var(--space-4) 0;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease-out),
              box-shadow 0.3s var(--ease-out);
  overflow-x: clip;
  max-width: 100vw;
}

.header--scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo-mark {
  width: 32px;
  height: 32px;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-cta {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  padding: var(--space-2) var(--space-5);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-full);
  color: var(--color-primary);
  text-decoration: none;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.header-cta:hover {
  background: var(--color-primary);
  color: var(--color-bg);
  box-shadow: 0 0 20px oklch(from var(--color-primary) l c h / 0.3);
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 30%, transparent 0%, var(--color-bg) 70%),
    linear-gradient(to bottom, transparent 50%, var(--color-bg) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  padding: var(--space-24) var(--space-6) var(--space-16);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: oklch(from var(--color-primary) l c h / 0.08);
  border: 1px solid oklch(from var(--color-primary) l c h / 0.2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-8);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  animation: pulse 2s ease-in-out infinite;
}

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

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 500;
  color: #e8ecf1;
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}

.hero h1 .accent {
  color: var(--color-primary);
}

.hero-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto var(--space-10);
}

/* ── Waitlist form ── */
.waitlist {
  display: flex;
  gap: var(--space-3);
  max-width: 440px;
  margin: 0 auto;
}

.waitlist input {
  flex: 1;
  min-width: 0;
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.waitlist input::placeholder {
  color: var(--color-text-faint);
}

.waitlist input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.15);
}

.waitlist button {
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-bg);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius-lg);
  white-space: nowrap;
  transition: background var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

.waitlist button:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 0 24px oklch(from var(--color-primary) l c h / 0.3);
  transform: translateY(-1px);
}

.waitlist button:active {
  transform: translateY(0);
}

.waitlist-msg {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
  text-align: center;
  min-height: 1.2em;
}

.waitlist-msg.success { color: var(--color-success); }
.waitlist-msg.error { color: var(--color-error); }

/* ── Scroll indicator ── */
.scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-faint);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ── Section shared ── */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.section-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: #e8ecf1;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 560px;
}

/* ── Features grid ── */
.features {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.features-header {
  text-align: center;
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}

.features-header .section-desc {
  margin-inline: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  padding: var(--space-8);
  background: var(--color-bg);
  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: oklch(from var(--color-primary) l c h / 0.3);
  box-shadow: var(--shadow-glow);
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
  color: var(--color-primary);
  background: oklch(from var(--color-primary) l c h / 0.08);
}

.feature-icon.purple {
  color: var(--color-secondary);
  background: oklch(from var(--color-secondary) l c h / 0.08);
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: #e8ecf1;
  margin-bottom: var(--space-3);
  letter-spacing: 0.02em;
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ── How it works ── */
.how-it-works .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.step {
  display: flex;
  gap: var(--space-5);
}

.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  border: 1px solid oklch(from var(--color-primary) l c h / 0.3);
  border-radius: var(--radius-full);
  background: oklch(from var(--color-primary) l c h / 0.06);
}

.step h3 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: #e8ecf1;
  margin-bottom: var(--space-2);
}

.step p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Terminal-style code block */
.terminal {
  background: #080c10;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
}

.terminal-dot:nth-child(1) { background: #ff5f57; }
.terminal-dot:nth-child(2) { background: #febc2e; }
.terminal-dot:nth-child(3) { background: #28c840; }

.terminal-body {
  padding: var(--space-6);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  line-height: 1.8;
  color: var(--color-text-muted);
}

.terminal-body .cmd { color: var(--color-primary); }
.terminal-body .str { color: var(--color-secondary); }
.terminal-body .cmt { color: var(--color-text-faint); }
.terminal-body .ok  { color: var(--color-success); }
.terminal-body p { white-space: nowrap; }

/* ── CTA / waitlist bottom ── */
.cta-section {
  text-align: center;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, oklch(from var(--color-primary) l c h / 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section .section-desc {
  margin-inline: auto;
  margin-bottom: var(--space-10);
}

/* ── Footer ── */
.footer {
  padding: var(--space-12) 0 var(--space-8);
  border-top: 1px solid var(--color-border);
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.footer-links {
  display: flex;
  gap: var(--space-8);
  list-style: none;
}

.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
}

.footer-copy a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

/* ── Scroll animations ── */
.fade-in { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}

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

/* ── Responsive ── */
@media (max-width: 768px) {
  .container {
    padding-inline: var(--space-4);
  }

  .header-cta {
    font-size: 0.7rem;
    padding: var(--space-1) var(--space-3);
    white-space: nowrap;
    flex-shrink: 0;
  }

  .logo-text {
    font-size: 0.8rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .feature-card {
    padding: var(--space-6);
  }

  .how-it-works .container {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .how-it-works .terminal {
    order: -1;
  }

  .waitlist {
    flex-direction: column;
  }

  .hero h1 {
    font-size: var(--text-2xl);
  }

  .hero-content {
    padding: var(--space-32) var(--space-4) var(--space-16);
  }

  .scroll-hint {
    display: none;
  }

  .terminal-body {
    font-size: 0.7rem;
    overflow-x: auto;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}