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

:root {
  --ink: #1a1410;
  --paper: #f5f0e8;
  --paper-dark: #ede7d9;
  --muted: #7a6e61;
  --border: rgba(26,20,16,0.15);
  --mono: 'DM Mono', monospace;
  --serif: 'DM Serif Display', 'Noto Serif TC', 'Noto Serif KR', serif;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--mono);
  text-transform: lowercase;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Nav ── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
}

.nav-logo img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: contain;
}

.nav-logo span {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 500;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
}

/* ── Main ── */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
}

.page {
  max-width: 600px;
  width: 100%;
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.05em;
  border-top: 1px solid var(--border);
}

/* ── Divider ── */
.divider {
  width: 36px;
  height: 2px;
  background: var(--ink);
  margin: 1rem auto;
}

/* ── Back link ── */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.06em;
  margin-bottom: 2rem;
  transition: color 0.15s;
}
.back-link:hover { color: var(--ink); }

/* ── Cards ── */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
}

/* ── Form ── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

label {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

input[type=text],
input[type=email],
textarea {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.88rem;
  outline: none;
  transition: border-color 0.15s;
  resize: vertical;
}

input[type=text]:focus,
input[type=email]:focus,
textarea:focus {
  border-color: var(--ink);
}

input::placeholder,
textarea::placeholder {
  color: var(--muted);
  opacity: 0.6;
}

textarea { min-height: 130px; }

.btn {
  width: 100%;
  padding: 0.75rem;
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.15s;
  margin-top: 0.5rem;
}

.btn:hover { opacity: 0.8; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: var(--paper);
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  opacity: 0;
  transition: all 0.3s;
  pointer-events: none;
  white-space: nowrap;
  z-index: 999;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 480px) {
  nav { padding: 1rem 1.25rem; }
  .nav-links { gap: 1.25rem; }
}