/* === Light Consulting Tone (youth/senior와 동일) ========================== */
:root {
  --bg: #ffffff;
  --fg: #0f172a;
  --muted: #475569;
  --edge: rgba(2, 6, 23, 0.12);
  --primary: #0b3b74;
  --primary-50: #e9f1ff;
  --surface: #f7f9fc;
  --elev: #ffffff;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(2,6,23,.06), 0 1px 1px rgba(2,6,23,.06);
  --shadow-md: 0 10px 24px rgba(2,6,23,.06), 0 4px 10px rgba(2,6,23,.08);
}

/* Base */
* { box-sizing: border-box; }
html, body {
  margin: 0; height: 100%;
  scroll-behavior: smooth;
  background: var(--bg); color: var(--fg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Pretendard,
               Apple SD Gothic Neo, Noto Sans KR, Arial, Helvetica, sans-serif;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* Header (공통 스타일) */
header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--edge);
}
.container { max-width: 1200px; margin: 0 auto; padding: 16px 20px; }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.logo a { color: var(--fg); font-size: 24px; font-weight: 800; }
.logo .mark { display: inline-block; padding: 6px 10px; border: 2px solid var(--fg); border-radius: 10px; }
.menu { display: flex; gap: 20px; }
.menu a {
  color: var(--muted); font-weight: 600; padding: 8px 10px; border-radius: 10px;
  border: 1px solid transparent;
}
.menu a:hover, .menu a:focus-visible {
  color: var(--fg); background: var(--primary-50); border-color: var(--edge);
}
.hamburger { display: none; }
@media (max-width: 860px) {
  .menu { display: none; }
  .menu.open {
    display: flex; flex-direction: column;
    position: absolute; top: 64px; right: 20px; left: 20px;
    background: var(--elev); border: 1px solid var(--edge); border-radius: 14px;
    padding: 12px 14px; gap: 12px; box-shadow: var(--shadow-md);
  }
  .hamburger {
    display: inline-flex; border: 1px solid var(--edge);
    background: var(--elev); color: var(--fg);
    padding: 8px 10px; border-radius: 10px;
  }
}

/* Hero */
.hero { padding: 28px 20px 44px; border-bottom: 1px solid var(--edge); }
.hero-card {
  border: 1px solid var(--edge); border-radius: var(--radius);
  padding: 28px; background: var(--elev); box-shadow: var(--shadow-sm);
}
.hero-card h1 { margin: 0 0 8px; font-size: 32px; }
.hero-card p  { margin: 0; color: var(--muted); }

/* Form Section */
.join-wrap { padding: 32px 0 64px; }

.join-form {
  border: 1px solid var(--edge);
  border-radius: 18px;
  background: var(--surface);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
}

.field { display: grid; gap: 8px; margin-bottom: 16px; }
.field label { font-weight: 700; }
.field input,
.field textarea {
  background: var(--elev);
  border: 1px solid var(--edge);
  border-radius: 10px;
  color: var(--fg);
  padding: 10px 12px;
}
.field textarea { resize: vertical; min-height: 90px; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}
.chips .chip {
  border: 1px solid var(--edge);
  background: var(--primary-50);
  color: var(--fg);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 13px;
}

.field #programs {
  width: 100%;
  min-height: 68px;
  font-size: 13px;
  color: var(--muted);
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--edge);
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
}
.btn.solid { background: var(--primary); color: #fff; }
.btn.solid:hover { background: var(--primary-50); color: var(--fg); }
.btn.ghost { background: transparent; color: var(--fg); }

.form-msg { margin-top: 14px; color: var(--muted); text-align: center; }
.form-msg.success { color: #047857; }
.form-msg.error { color: #b91c1c; }

/* Reveal Animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.show { opacity: 1; transform: translateY(0); }

/* Footer */
footer { border-top: 1px solid var(--edge); padding: 28px 20px; color: var(--muted); }
.foot { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; }