/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0a0f;
  --bg2: #111118;
  --bg3: #1a1a25;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.18);
  --accent: #6c63ff;
  --accent2: #8b83ff;
  --accent-glow: rgba(108,99,255,0.3);
  --text: #f0f0f8;
  --text-muted: #888899;
  --text-dim: #55556a;
  --success: #22c55e;
  --danger: #ef4444;
  --radius: 14px;
  --radius-sm: 8px;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* ===== App Layout ===== */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.logo-icon { font-size: 22px; }
.logo-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #fff 0%, var(--accent2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.progress-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
}

.progress-bar {
  flex: 1;
  height: 4px;
  background: var(--bg3);
  border-radius: 99px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 99px;
  transition: width 0.4s cubic-bezier(0.4,0,0.2,1);
  box-shadow: 0 0 8px var(--accent-glow);
  width: 0%;
}

.progress-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ===== Main ===== */
.main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

/* ===== Card ===== */
.card {
  width: 100%;
  max-width: 560px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 44px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.03);
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.6;
}

/* ===== Steps ===== */
.step {
  display: none;
  animation: fadeSlideIn 0.35s cubic-bezier(0.4,0,0.2,1) both;
}
.step.active { display: block; }
.step.leaving {
  animation: fadeSlideOut 0.25s cubic-bezier(0.4,0,0.2,1) both;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeSlideOut {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-14px); }
}
@keyframes fadeSlideBack {
  from { opacity: 0; transform: translateY(-18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.step.entering-back {
  animation: fadeSlideBack 0.35s cubic-bezier(0.4,0,0.2,1) both;
}

.step-icon {
  font-size: 52px;
  margin-bottom: 20px;
  display: block;
  text-align: center;
}
.success-icon { filter: drop-shadow(0 0 16px rgba(34,197,94,0.5)); }

.step-number {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent2);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 14px;
}

.step-title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.3;
  margin-bottom: 10px;
  color: var(--text);
}
.step.active:not([id="step-0"]) .step-title,
#step-summary .step-title {
  font-size: 20px;
}
#step-0 .step-title {
  font-size: 28px;
  text-align: center;
  background: linear-gradient(135deg, #fff 0%, var(--accent2) 60%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
#step-success .step-title { text-align: center; }

.step-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 10px;
}
.step-desc.secondary { font-size: 14px; color: var(--text-dim); }
#step-0 .step-desc { text-align: center; }

/* ===== Fields ===== */
.field { margin: 20px 0; }

.input {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  padding: 13px 16px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}
.input::placeholder { color: var(--text-dim); }
.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.input.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(239,68,68,0.2);
}
textarea.input { min-height: 100px; }

/* ===== Toggle ===== */
.toggle-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}
.toggle-input { display: none; }
.toggle-box {
  width: 46px;
  height: 26px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 99px;
  position: relative;
  transition: background var(--transition), border-color var(--transition);
  flex-shrink: 0;
}
.toggle-knob {
  position: absolute;
  top: 3px; left: 3px;
  width: 18px; height: 18px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
}
.toggle-input:checked ~ .toggle-box {
  background: var(--accent);
  border-color: var(--accent);
}
.toggle-input:checked ~ .toggle-box .toggle-knob {
  transform: translateX(20px);
  background: #fff;
}
.toggle-text {
  font-size: 15px;
  color: var(--text-muted);
  transition: color var(--transition);
}
.toggle-input:checked + .toggle-box + .toggle-text { color: var(--text); }

/* ===== Style Cards ===== */
.style-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0;
}
.style-card {
  cursor: pointer;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  background: var(--bg3);
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  overflow: hidden;
}
.style-card:hover {
  border-color: var(--border-hover);
  background: rgba(108,99,255,0.06);
}
.style-input { display: none; }
.style-input:checked + .style-body {
  background: rgba(108,99,255,0.12);
}
.style-card:has(.style-input:checked) {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.style-body {
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: background var(--transition);
}
.style-emoji { font-size: 24px; margin-bottom: 4px; }
.style-name { font-size: 14px; font-weight: 600; }
.style-hint { font-size: 12px; color: var(--text-muted); }

/* ===== Page Cards ===== */
.pages-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 20px 0;
}
.page-card {
  cursor: pointer;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg3);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.page-card:hover { border-color: var(--border-hover); }
.page-input { display: none; }
.page-card:has(.page-input:checked) {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.page-body {
  padding: 14px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-emoji { font-size: 18px; }
.page-name { font-size: 13px; font-weight: 500; }
.page-card:has(.page-input:checked) .page-name { color: var(--accent2); }

/* ===== Buttons ===== */
.actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.actions .btn:last-child { margin-left: auto; }
.actions .btn:only-child { margin-left: auto; }
#step-0 .actions { justify-content: center; }
#step-0 .actions .btn { margin-left: 0; }
.summary-actions { justify-content: space-between; }
.summary-actions .btn:last-child { margin-left: 0; }

.btn {
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--accent-glow);
  filter: brightness(1.1);
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: var(--bg3);
  border-color: var(--border-hover);
  color: var(--text);
}
.btn-send { padding: 13px 28px; font-size: 16px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ===== Spinner ===== */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Summary ===== */
.summary-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 20px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.summary-row {
  display: flex;
  padding: 13px 16px;
  gap: 14px;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.summary-row:last-child { border-bottom: none; }
.summary-row:hover { background: rgba(255,255,255,0.02); }
.summary-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  min-width: 120px;
  flex-shrink: 0;
  padding-top: 1px;
}
.summary-value {
  font-size: 14px;
  color: var(--text);
  line-height: 1.5;
  flex: 1;
  word-break: break-word;
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 24px;
  font-size: 12px;
  color: var(--text-dim);
}

/* ===== Error toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--danger);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  padding: 12px 20px;
  border-radius: 8px;
  z-index: 9999;
  box-shadow: 0 4px 20px rgba(239,68,68,0.4);
  transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
  pointer-events: none;
  white-space: nowrap;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .card { padding: 32px 22px; border-radius: 14px; }
  .style-grid, .pages-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .step-title { font-size: 20px !important; }
  #step-0 .step-title { font-size: 24px !important; }
  .summary-label { min-width: 90px; }
}
@media (max-width: 380px) {
  .style-grid, .pages-grid { grid-template-columns: 1fr; }
}