/* ============================================================
   PLAIN VISION — GLOBAL STYLES
   
   This is the design system. Every page uses these styles.
   
   TO EDIT COLORS:    look for "DESIGN TOKENS" below
   TO EDIT TYPOGRAPHY: look for "TYPOGRAPHY" below
   TO EDIT BUTTONS:   look for "BUTTONS" below
   TO EDIT FORMS:     look for "FORMS" below
   ============================================================ */

/* ============================================================
   RESET
   ============================================================ */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

img, svg, video, canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* ============================================================
   DESIGN TOKENS
   Change these to retheme the entire site.
   ============================================================ */

:root {
  /* Ink */
  --ink: #1d1d1f;
  --ink-soft: #424245;
  --ink-mute: #86868b;
  --ink-faint: #a1a1a6;

  /* Lines */
  --line: #d2d2d7;
  --line-soft: #e8e8ed;

  /* Surfaces */
  --bg: #fbfbfd;
  --bg-alt: #f5f5f7;
  --card: #ffffff;

  /* Accent */
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --accent-soft: rgba(0, 113, 227, 0.08);

  /* Status */
  --success: #00875a;
  --success-soft: rgba(0, 135, 90, 0.08);
  --danger: #d70015;

  /* Dark */
  --dark: #1d1d1f;

  /* Radii */
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.10);

  /* Layout */
  --max: 1120px;
  --max-narrow: 760px;
  --gutter: 24px;

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (max-width: 720px) {
  :root {
    --gutter: 20px;
  }
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h1 { font-size: clamp(44px, 6vw, 76px); font-weight: 800; letter-spacing: -0.04em; line-height: 1.02; }
h2 { font-size: clamp(30px, 4vw, 48px); font-weight: 700; letter-spacing: -0.03em; line-height: 1.08; }
h3 { font-size: clamp(20px, 2.4vw, 26px); font-weight: 600; }
h4 { font-size: 18px; font-weight: 600; }
h5 { font-size: 15px; font-weight: 600; }
h6 { font-size: 13px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; }

p {
  color: var(--ink-soft);
  line-height: 1.65;
  margin-bottom: 1em;
}

p.lead {
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.5;
  color: var(--ink-soft);
}

.eyebrow,
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.muted {
  color: var(--ink-mute);
}

.small {
  font-size: 13px;
  line-height: 1.5;
}

strong, b {
  font-weight: 600;
  color: var(--ink);
}

/* ============================================================
   LAYOUT
   ============================================================ */

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.container-narrow {
  max-width: var(--max-narrow);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

section {
  padding: 100px 0;
}

@media (max-width: 720px) {
  section { padding: 64px 0; }
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-header p {
  font-size: 18px;
  color: var(--ink-soft);
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 34px;
  background: var(--ink);
  color: #fff;
  border: none;
  border-radius: var(--radius-pill);
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  letter-spacing: -0.01em;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, transform 0.15s;
  white-space: nowrap;
}

.btn:hover {
  background: #000;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  background: var(--line);
  color: var(--ink-mute);
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--ink);
}

.btn-secondary:hover {
  background: var(--ink);
  color: #fff;
}

.btn-accent {
  background: var(--accent);
}

.btn-accent:hover {
  background: var(--accent-hover);
}

.btn-lg {
  padding: 18px 42px;
  font-size: 17px;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-row.center {
  justify-content: center;
}

/* ============================================================
   FORMS
   ============================================================ */

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance: none;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.field input::placeholder {
  color: #b0b0b5;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field-row-3 {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 12px;
}

@media (max-width: 520px) {
  .field-row,
  .field-row-3 { grid-template-columns: 1fr; }
}

.field-hint {
  font-size: 12px;
  color: var(--ink-mute);
  margin-top: 6px;
}

.field-error {
  font-size: 12px;
  color: var(--danger);
  margin-top: 6px;
  display: none;
}

.field.has-error .field-error { display: block; }
.field.has-error input { border-color: var(--danger); }

.check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-soft);
  cursor: pointer;
  line-height: 1.45;
}

.check input {
  width: 18px;
  height: 18px;
  margin-top: 1px;
  accent-color: var(--accent);
  flex-shrink: 0;
  cursor: pointer;
}

/* ============================================================
   CARDS
   ============================================================ */

.card {
  padding: 26px;
  background: var(--card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.card + .card {
  margin-top: 16px;
}

.card-hover:hover {
  border-color: var(--ink-mute);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* ============================================================
   SCROLL REVEAL ANIMATION
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   UTILITIES
   ============================================================ */

.center { text-align: center; }
.text-muted { color: var(--ink-mute); }
.text-soft { color: var(--ink-soft); }
.text-ink { color: var(--ink); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-6 { margin-top: 48px; }
.mt-8 { margin-top: 64px; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-6 { margin-bottom: 48px; }
.mb-8 { margin-bottom: 64px; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }
.gap-4 { gap: 32px; }

.hidden { display: none; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}