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

:root {
  --bg: #faf9f7;
  --text: #1a1814;
  --text2: #6b6560;
  --text3: #b0aaa3;
  --accent: #1a1814;
  --neon: #c8b97a;
  --border: #e0dbd4;
  --font-serif: 'Cormorant Garamond', serif;
  --font-sans: 'Inter', sans-serif;
  --ease: cubic-bezier(0.65, 0, 0.35, 1);
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
}

/* ── PROGRESS ── */
.progress-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--border);
  z-index: 100;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.5s var(--ease);
  width: 0%;
}

/* ── STEP COUNTER ── */
.step-counter {
  position: fixed;
  top: 20px; right: 24px;
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--text3);
  z-index: 100;
  font-weight: 300;
  transition: opacity 0.3s ease;
}

/* ── SLIDES ── */
.slides {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  transform: translateY(100vh);
  transition: transform 0.65s var(--ease), opacity 0.65s ease;
  opacity: 0;
  pointer-events: none;
}

.slide.active {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.slide.above {
  transform: translateY(-100vh);
  opacity: 0;
  pointer-events: none;
}

.slide-inner {
  max-width: 560px;
  width: 100%;
}

/* ── TYPOGRAPHY ── */
.slide-pre {
  font-size: 11px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 20px;
  font-weight: 300;
}

.slide-title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 300;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.slide-title em {
  font-style: italic;
  color: var(--text2);
}

.intro-title {
  font-size: clamp(40px, 6vw, 64px);
  margin-bottom: 20px;
}

.slide-desc {
  font-size: 16px;
  color: var(--text2);
  line-height: 1.7;
  font-weight: 300;
  margin-bottom: 40px;
}

.slide-hint {
  font-size: 13px;
  color: var(--text3);
  margin-bottom: 24px;
  line-height: 1.6;
  font-weight: 300;
}

/* ── INPUTS ── */
.slide-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  font-size: 18px;
  font-family: var(--font-sans);
  font-weight: 300;
  color: var(--text);
  outline: none;
  transition: border-color 0.25s ease;
  margin-bottom: 28px;
}

.slide-input::placeholder { color: var(--text3); font-size: 15px; }
.slide-input:focus { border-bottom-color: var(--accent); }

.slide-textarea {
  resize: none;
  min-height: 80px;
  line-height: 1.6;
  font-size: 15px;
}

/* ── CHOICE BUTTONS ── */
.choice-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 32px;
}

.choice {
  background: transparent;
  border: 1px solid var(--border);
  padding: 14px 20px;
  font-size: 15px;
  font-family: var(--font-sans);
  font-weight: 300;
  color: var(--text2);
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
}

.choice:hover { border-color: var(--accent); color: var(--text); }

.choice.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

/* ── BUTTONS ── */
.btn-row {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.btn-next, .btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--bg);
  border: 1px solid var(--accent);
  padding: 14px 32px;
  font-size: 13px;
  font-family: var(--font-sans);
  font-weight: 400;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.25s ease;
  min-height: 48px;
}

.btn-next:hover, .btn-submit:hover {
  background: transparent;
  color: var(--accent);
}

.btn-arrow {
  font-size: 16px;
  letter-spacing: 0;
}

.btn-back {
  background: transparent;
  border: none;
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--text3);
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: 300;
  padding: 8px 0;
  transition: color 0.2s ease;
}

.btn-back:hover { color: var(--text2); }

/* ── DONE ── */
.done-inner { text-align: center; }

.done-mark {
  font-size: 32px;
  color: var(--text3);
  margin-bottom: 28px;
}

/* ── NAV HINT ── */
.nav-hint {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--text3);
  text-transform: uppercase;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

/* ── MOBILE ── */
@media (max-width: 600px) {
  .slide {
    padding: 24px 20px;
    align-items: flex-start;
    padding-top: 72px;
    overflow-y: auto;    /* 키보드 올라와도 스크롤로 버튼 접근 가능 */
  }
  .slide-inner { padding-bottom: 32px; }
  .slide-input { font-size: 16px; } /* iOS 자동 확대 방지 */
  .nav-hint { display: none; }
}