:root {
  --bg: #faf9f7;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --border: #e5e2dc;
  --primary: #1a1a1a;
  --primary-text: #ffffff;
  --accent: #c8a96e;
  --coral: #d4614a;
  --slot-avail: #f5f2ed;
  --slot-avail-border: #c8a96e;
  --slot-full: #f0f0f0;
  --slot-full-text: #b0b0b0;
  --success: #3d8b5e;
  --radius: 12px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
  min-height: 100vh;
  padding: 24px 16px 60px;
}

.container {
  max-width: 480px;
  margin: 0 auto;
}

header {
  text-align: center;
  padding: 32px 0 36px;
}

.event-label {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 10px;
  font-weight: 500;
}

header h1 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.subtitle {
  font-size: 14px;
  color: var(--muted);
}

/* Steps */
.step { display: none; }
.step.active { display: block; }

.step h2 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 20px;
}

/* Slot grid */
.slot-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 24px;
}

.slot-btn {
  border: 1.5px solid var(--slot-avail-border);
  background: var(--slot-avail);
  border-radius: var(--radius);
  padding: 18px 12px;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}

.slot-btn:hover { background: #eee9df; }

.slot-btn.selected {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-text);
}

.slot-btn.selected .slot-remain { color: #ccc; }

.slot-btn.full {
  background: var(--slot-full);
  border-color: var(--border);
  color: var(--slot-full-text);
  cursor: not-allowed;
}

.slot-time {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.slot-remain {
  font-size: 12px;
  color: var(--muted);
}

.loading { color: var(--muted); font-size: 14px; padding: 20px 0; }

/* Form */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 16px;
  background: var(--card);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}

.form-group input:focus { border-color: var(--accent); }

.guests-control {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}

.guests-control button {
  width: 52px;
  height: 52px;
  font-size: 20px;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--text);
  transition: background 0.1s;
}

.guests-control button:hover { background: var(--bg); }
.guests-control button:disabled { color: var(--border); cursor: not-allowed; }

#guests-count {
  flex: 1;
  text-align: center;
  font-size: 18px;
  font-weight: 700;
}

.guests-hint {
  margin-top: 8px;
  font-size: 12px;
  color: var(--accent);
}

.selected-time-display {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 24px;
  padding: 12px 16px;
  background: #f5f1ea;
  border-radius: 8px;
}

/* Buttons */
.btn-primary {
  display: block;
  width: 100%;
  padding: 16px;
  background: var(--primary);
  color: var(--primary-text);
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.15s;
}

.btn-primary:hover { opacity: 0.85; }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-secondary {
  display: block;
  padding: 16px;
  background: transparent;
  color: var(--muted);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  cursor: pointer;
  transition: background 0.1s;
}

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

.btn-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  margin-top: 8px;
}

/* Done / Error states */
.success-icon {
  width: 64px;
  height: 64px;
  background: var(--success);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 20px;
}

.error-icon {
  width: 64px;
  height: 64px;
  background: var(--coral);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 20px;
  font-weight: 700;
}

#step-done h2, #step-done { text-align: center; }
#step-error h2, #step-error { text-align: center; }

.reservation-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin: 20px 0;
  text-align: left;
}

.reservation-card .row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.reservation-card .row:last-child { border-bottom: none; }
.reservation-card .row span:first-child { color: var(--muted); }
.reservation-card .code-value {
  font-weight: 700;
  font-size: 15px;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.cancel-notice {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  margin-bottom: 16px;
  line-height: 1.6;
}

.btn-cancel-link {
  display: block;
  text-align: center;
  color: var(--coral);
  font-size: 14px;
  text-decoration: none;
  padding: 10px;
}

/* 인스타 입력 박스 */
.insta-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin: 16px 0;
  text-align: center;
}

.insta-prompt {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 14px;
}

.insta-input-row {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
}

.insta-at {
  padding: 0 10px;
  font-size: 16px;
  color: var(--muted);
  font-weight: 600;
}

.insta-input-row input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 13px 0;
  font-size: 15px;
  color: var(--text);
  outline: none;
}

.btn-insta {
  padding: 13px 18px;
  background: var(--accent);
  color: #fff;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}

.btn-insta:hover { opacity: 0.85; }

.insta-skip {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.insta-sent {
  text-align: center;
  color: var(--success);
  font-size: 15px;
  font-weight: 600;
  padding: 16px 0;
}