/* ==========================================================================
   FormForge — design tokens
   Direction: Swiss/International structure with a "paper sheet → live form"
   metaphor. Ink navy surfaces, warm forge-amber accent, a grid motif that
   nods to the spreadsheet this product replaces.
   ========================================================================== */

:root {
  --color-ink-950: #0b0f14;
  --color-ink-900: #10161d;
  --color-ink-800: #171f29;
  --color-ink-700: #232d3a;
  --color-ink-600: #3a4757;
  --color-paper: #faf8f3;
  --color-paper-dim: #f0ede4;
  --color-line: #d9d3c4;
  --color-text-hi: #f4f1e9;
  --color-text-mid: #b7c0cc;
  --color-text-ink: #1b1f24;
  --color-text-ink-mid: #545b64;
  --color-amber: #e8973a;
  --color-amber-hi: #ffb463;
  --color-amber-dim: #7a5323;
  --color-good: #4caf7d;
  --color-bad: #d9634f;

  --font-display: "Fraunces", "Iowan Old Style", ui-serif, Georgia, serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.84rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.4vw, 1.3rem);
  --text-xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --text-hero: clamp(2.4rem, 1.7rem + 3.2vw, 4.4rem);

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.75rem;
  --space-lg: clamp(2.5rem, 2rem + 2.5vw, 4.5rem);
  --space-section: clamp(4rem, 3rem + 5vw, 8rem);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --duration-fast: 150ms;
  --duration-normal: 280ms;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-card: 0 1px 2px rgba(11, 15, 20, 0.06), 0 12px 32px -16px rgba(11, 15, 20, 0.28);
  --shadow-lift: 0 24px 48px -20px rgba(11, 15, 20, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--color-ink-950);
  color: var(--color-text-hi);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body.on-paper {
  color-scheme: light;
  background: var(--color-paper);
  color: var(--color-text-ink);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  margin: 0 0 var(--space-sm);
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 var(--space-sm);
}

a {
  color: inherit;
}

.container {
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* ---- header / nav ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
  background: rgba(11, 15, 20, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-xs);
  gap: var(--space-md);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--color-text-hi);
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(145deg, var(--color-amber-hi), var(--color-amber-dim));
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-ink-950);
}

.nav-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-sm);
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text-mid);
  transition: color var(--duration-fast) ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-amber-hi);
}

/* ---- buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out-expo),
    box-shadow var(--duration-fast) ease, background var(--duration-fast) ease,
    border-color var(--duration-fast) ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--color-amber);
  color: var(--color-ink-950);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-amber-hi);
  box-shadow: 0 8px 20px -8px rgba(232, 151, 58, 0.55);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--color-text-hi);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--color-amber-hi);
  color: var(--color-amber-hi);
}

.btn-block {
  width: 100%;
}

.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}

/* ---- hero ---- */

.hero {
  padding-block: calc(var(--space-section) * 0.85) var(--space-lg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 640px;
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(232, 151, 58, 0.05) 0,
      rgba(232, 151, 58, 0.05) 1px,
      transparent 1px,
      transparent 48px
    ),
    repeating-linear-gradient(
      to right,
      rgba(232, 151, 58, 0.05) 0,
      rgba(232, 151, 58, 0.05) 1px,
      transparent 1px,
      transparent 48px
    );
  mask-image: radial-gradient(ellipse 60% 50% at 50% 20%, black, transparent 75%);
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-amber-hi);
  border: 1px solid rgba(232, 151, 58, 0.35);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  margin-bottom: var(--space-sm);
}

.hero h1 {
  font-size: var(--text-hero);
  max-width: 18ch;
}

.hero .lede {
  font-size: var(--text-lg);
  color: var(--color-text-mid);
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

/* ---- transform strip (excel -> form visual) ---- */

.transform-strip {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-sm);
  align-items: center;
  margin-top: var(--space-lg);
  max-width: 900px;
}

.transform-card {
  background: var(--color-ink-800);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  box-shadow: var(--shadow-card);
}

.transform-card h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-mid);
  margin-bottom: 0.6rem;
}

.mini-sheet {
  display: grid;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  overflow: hidden;
}

.mini-sheet .row {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.mini-sheet .cell {
  padding: 0.35rem 0.5rem;
  border-bottom: 1px solid var(--color-line);
  border-right: 1px solid var(--color-line);
  background: var(--color-paper);
  color: var(--color-text-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mini-sheet .cell.head {
  background: var(--color-paper-dim);
  font-weight: 700;
}

.mini-sheet .row:last-child .cell {
  border-bottom: none;
}

.mini-sheet .cell:last-child {
  border-right: none;
}

.mini-form {
  display: grid;
  gap: 0.5rem;
}

.mini-form .field {
  display: grid;
  gap: 0.2rem;
}

.mini-form label {
  font-size: 0.68rem;
  color: var(--color-text-mid);
}

.mini-form .control {
  height: 26px;
  border-radius: 5px;
  background: var(--color-ink-700);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.transform-arrow {
  font-family: var(--font-mono);
  color: var(--color-amber-hi);
  font-size: 1.4rem;
}

/* ---- sections ---- */

section {
  padding-block: var(--space-section);
}

.section-head {
  max-width: 62ch;
  margin-bottom: var(--space-lg);
}

.section-head .eyebrow {
  color: var(--color-amber-hi);
}

.section-head h2 {
  font-size: var(--text-xl);
}

.section-head p {
  color: var(--color-text-mid);
  font-size: var(--text-base);
}

.section-alt {
  background: var(--color-ink-900);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

/* ---- steps ---- */

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

.step {
  background: var(--color-ink-800);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.step-number {
  font-family: var(--font-mono);
  color: var(--color-amber-hi);
  font-size: var(--text-sm);
  margin-bottom: 0.5rem;
  display: block;
}

.step h3 {
  font-size: 1.15rem;
}

.step p {
  color: var(--color-text-mid);
  font-size: var(--text-sm);
  margin-bottom: 0;
}

/* ---- pricing ---- */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  align-items: stretch;
}

.price-card {
  display: flex;
  flex-direction: column;
  background: var(--color-ink-800);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  position: relative;
}

.price-card.featured {
  border-color: var(--color-amber);
  background: linear-gradient(165deg, rgba(232, 151, 58, 0.1), var(--color-ink-800) 55%);
  box-shadow: var(--shadow-lift);
  transform: translateY(-8px);
}

.price-card .badge {
  position: absolute;
  top: -12px;
  right: var(--space-md);
  background: var(--color-amber);
  color: var(--color-ink-950);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
}

.price-card h3 {
  font-size: 1.2rem;
}

.price-tag {
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--color-amber-hi);
  margin-bottom: var(--space-xs);
}

.price-tag small {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-mid);
  font-weight: 500;
}

.price-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-md);
  display: grid;
  gap: 0.55rem;
  font-size: var(--text-sm);
  color: var(--color-text-mid);
  flex: 1;
}

.price-card li::before {
  content: "→ ";
  color: var(--color-amber-hi);
  font-weight: 700;
}

/* ---- demo preview card ---- */

.demo-preview {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-lg);
  align-items: center;
}

.demo-copy p {
  color: var(--color-text-mid);
}

.demo-copy ul {
  color: var(--color-text-mid);
  padding-left: 1.2rem;
  font-size: var(--text-sm);
}

.demo-frame {
  background: var(--color-ink-800);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-sm);
  box-shadow: var(--shadow-card);
}

.demo-frame img,
.demo-frame .frame-inner {
  border-radius: var(--radius-sm);
  display: block;
  width: 100%;
}

.browser-chrome {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.7rem;
  padding-left: 0.2rem;
}

.browser-chrome span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-ink-600);
}

/* ---- payment section ---- */

.pay-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.pay-card {
  background: var(--color-ink-800);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.pay-card h3 {
  font-size: 1.1rem;
}

.addr-box {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--color-ink-950);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 0.8rem;
  word-break: break-all;
  margin-block: var(--space-xs);
  color: var(--color-amber-hi);
}

/* ---- lead form ---- */

.lead-form {
  background: var(--color-ink-800);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  max-width: 640px;
  margin-inline: auto;
}

.form-row {
  display: grid;
  gap: 0.35rem;
  margin-bottom: var(--space-sm);
}

.form-row label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-hi);
}

.form-row .hint {
  font-size: var(--text-xs);
  color: var(--color-text-mid);
  font-weight: 400;
}

input, select, textarea, button {
  font-family: var(--font-body);
  font-size: var(--text-base);
}

.field-control {
  padding: 0.65rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: var(--color-ink-900);
  color: var(--color-text-hi);
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

.field-control:focus {
  outline: none;
  border-color: var(--color-amber);
  box-shadow: 0 0 0 3px rgba(232, 151, 58, 0.2);
}

.field-error {
  font-size: var(--text-xs);
  color: var(--color-bad);
  min-height: 1em;
}

.field-control.invalid {
  border-color: var(--color-bad);
}

.honeypot-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-status {
  margin-top: var(--space-sm);
  font-size: var(--text-sm);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  display: none;
}

.form-status.show {
  display: block;
}

.form-status.success {
  background: rgba(76, 175, 125, 0.15);
  color: var(--color-good);
  border: 1px solid rgba(76, 175, 125, 0.3);
}

.form-status.error {
  background: rgba(217, 99, 79, 0.15);
  color: var(--color-bad);
  border: 1px solid rgba(217, 99, 79, 0.3);
}

/* ---- footer ---- */

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding-block: var(--space-lg);
  color: var(--color-text-mid);
  font-size: var(--text-sm);
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* ---- responsive ---- */

@media (max-width: 860px) {
  .pricing-grid,
  .steps {
    grid-template-columns: 1fr;
  }
  .price-card.featured {
    transform: none;
  }
  .demo-preview,
  .pay-grid {
    grid-template-columns: 1fr;
  }
  .transform-strip {
    grid-template-columns: 1fr;
  }
  .transform-arrow {
    transform: rotate(90deg);
    justify-self: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.001ms !important;
  }
}