/* ============================================================
   WEDDING-21 | main.css
   "WABI-SABI ZEN" — Japanese-inspired minimalism
   Negative space (ma), sumi ink strokes, hanko seal red.
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@400;500;600;700&family=Zen+Kaku+Gothic+New:wght@300;400;500;700&display=swap");

:root {
  --washi: #f4f1ea;
  --washi-2: #ece6d8;
  --stone: #8b8578;
  --stone-light: #c9c3b3;
  --ink: #2b2b28;
  --ink-soft: #52504a;
  --hanko: #b23a2e;
  --hanko-dark: #8c2c22;
  --moss: #6b7361;

  --border-soft: rgba(139, 133, 120, 0.35);
  --border-strong: rgba(43, 43, 40, 0.25);

  --font-display: "Shippori Mincho", Georgia, serif;
  --font-body: "Zen Kaku Gothic New", system-ui, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.2rem;
  --text-xl: 1.5rem;
  --text-2xl: 1.9rem;
  --text-3xl: 2.5rem;
  --text-4xl: 3.2rem;
  --text-5xl: 4.4rem;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration: 500ms;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: var(--text-base);
  line-height: 1.9;
  color: var(--ink-soft);
  background: var(--washi);
}

a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
ul,
ol {
  list-style: none;
}
button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.35;
  color: var(--ink);
}

.wrap {
  width: 100%;
  max-width: 760px;
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.zen-section {
  padding-block: var(--space-24);
}

/* ── Vertical eyebrow label (mimics vertical Japanese text) ── */
.eyebrow-zen {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.3em;
  color: var(--hanko);
  height: 70px;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

.section-title {
  font-size: clamp(1.6rem, 4vw, var(--text-3xl));
  margin-bottom: var(--space-6);
}
.section-desc {
  max-width: 440px;
  margin-inline: auto;
  font-size: var(--text-base);
  color: var(--stone);
}

/* ── Brush-stroke divider ── */
.brush-divider {
  width: 120px;
  height: 14px;
  margin: var(--space-8) auto;
  opacity: 0.75;
}

/* ── Buttons ── */
.btn-ink,
.btn-outline-ink {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 13px 30px;
  border-radius: 2px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  transition: all var(--duration) var(--ease-out);
  cursor: pointer;
}
.btn-ink {
  background: var(--ink);
  color: var(--washi);
}
.btn-ink:hover {
  background: var(--hanko-dark);
  transform: translateY(-2px);
}
.btn-outline-ink {
  border: 1px solid var(--border-strong);
  color: var(--ink);
}
.btn-outline-ink:hover {
  border-color: var(--hanko);
  color: var(--hanko);
  transform: translateY(-2px);
}

/* ── Forms ── */
.form-group {
  margin-bottom: var(--space-6);
  text-align: left;
}
.form-label {
  display: block;
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--stone);
  margin-bottom: var(--space-2);
}
.form-control {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border-strong);
  padding: 10px 2px;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--ink);
  outline: none;
  transition: border-color var(--duration);
  resize: vertical;
}
.form-control::placeholder {
  color: var(--stone-light);
}
.form-control:focus {
  border-color: var(--hanko);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--ink-soft);
}
.radio-label input {
  display: none;
}
.radio-custom {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.radio-custom::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--hanko);
  opacity: 0;
  transform: scale(0);
  transition: all var(--duration) var(--ease-out);
}
.radio-label input:checked ~ .radio-custom::after {
  opacity: 1;
  transform: scale(1);
}

@media (max-width: 640px) {
  .wrap {
    padding-inline: var(--space-5);
  }
  .zen-section {
    padding-block: var(--space-16);
  }
}