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

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #13131a;
  --bg-card: #1a1a25;
  --bg-input: #1e1e2a;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b0;
  --text-muted: #666680;
  --accent: #7c5cfc;
  --accent-hover: #9b7dff;
  --chatgpt-color: #10A37F;
  --gemini-color: #4285F4;
  --claude-color: #D97757;
  --border: #2a2a3a;
  --success: #4ade80;
  --error: #f87171;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --font: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

#app {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  min-height: 100dvh;
  position: relative;
  overflow: hidden;
}

/* ========== Screen System ========== */
.screen {
  display: none;
  min-height: 100dvh;
  width: 100%;
}

.screen.active {
  display: flex;
}

.screen-content {
  width: 100%;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
}

/* ========== Step Indicator ========== */
.step-indicator {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
}

.step-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: all 0.3s ease;
}

.step-dot.active {
  background: var(--accent);
  width: 24px;
  border-radius: 4px;
}

.step-dot.done {
  background: var(--accent);
  opacity: 0.5;
}

/* ========== Start Screen ========== */
.start-content {
  text-align: center;
  gap: 16px;
}

.logo-area {
  margin-bottom: 8px;
}

.ai-avatars-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
}

.ai-avatar-badge {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
}

.ai-avatar-badge img {
  width: 100%;
  height: 100%;
}

.chatgpt-badge { background: rgba(16, 163, 127, 0.15); border: 2px solid rgba(16, 163, 127, 0.3); }
.gemini-badge { background: rgba(66, 133, 244, 0.15); border: 2px solid rgba(66, 133, 244, 0.3); }
.claude-badge { background: rgba(217, 119, 87, 0.15); border: 2px solid rgba(217, 119, 87, 0.3); }

.main-title {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--chatgpt-color), var(--gemini-color), var(--claude-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sub-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 4px;
}

.description {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.description strong {
  color: var(--text-primary);
}

.description-small {
  font-size: 14px;
  color: var(--text-muted);
}

.footer-note {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ========== Buttons ========== */
.btn-primary {
  width: 100%;
  max-width: 320px;
  padding: 16px 24px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: #fff;
  font-family: var(--font);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 12px;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

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

.btn-secondary {
  width: 100%;
  max-width: 320px;
  padding: 14px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 12px;
}

.btn-secondary:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

/* ========== Typography ========== */
.screen-title {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
  margin-bottom: 8px;
}

.screen-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.question-progress {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 16px;
}

/* ========== Input ========== */
.input-wrap {
  width: 100%;
  max-width: 320px;
  position: relative;
  margin-bottom: 8px;
}

.text-input {
  width: 100%;
  padding: 16px 20px;
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 17px;
  outline: none;
  transition: border-color 0.2s;
}

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

.text-input::placeholder {
  color: var(--text-muted);
}

.char-count {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  color: var(--text-muted);
}

/* ========== Options (셀프체크) ========== */
.options-list {
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.option-card {
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-secondary);
  text-align: left;
}

.option-card:hover {
  border-color: var(--accent);
  background: rgba(124, 92, 252, 0.08);
}

.option-card.selected {
  border-color: var(--accent);
  background: rgba(124, 92, 252, 0.12);
  color: var(--text-primary);
}

/* ========== Textarea (주관식) ========== */
.textarea-wrap {
  width: 100%;
  max-width: 400px;
  margin-bottom: 8px;
}

.text-area {
  width: 100%;
  padding: 16px 20px;
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  outline: none;
  resize: none;
  transition: border-color 0.2s;
  min-height: 160px;
}

.text-area:focus {
  border-color: var(--accent);
}

.text-area::placeholder {
  color: var(--text-muted);
}

.textarea-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  padding: 0 4px;
}

.char-status {
  font-size: 13px;
  color: var(--text-muted);
  transition: color 0.2s;
}

.char-status.met {
  color: var(--success);
}

.textarea-footer .char-count {
  position: static;
  transform: none;
}

/* ========== Loading Screen ========== */
.loading-content {
  gap: 24px;
  text-align: center;
}

.loading-spinner {
  width: 64px;
  height: 64px;
  position: relative;
}

.spinner-ring {
  width: 100%;
  height: 100%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  min-height: 48px;
  transition: opacity 0.3s;
}

.loading-progress {
  width: 200px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.loading-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--chatgpt-color), var(--gemini-color), var(--claude-color));
  border-radius: 2px;
  transition: width 0.5s ease;
}

.loading-agents {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 200px;
}

.agent-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.3s;
}

.agent-status.active-agent {
  color: var(--text-primary);
}

.agent-status.done-agent {
  color: var(--success);
}

.agent-icon {
  width: 24px;
  height: 24px;
}

.agent-state {
  margin-left: auto;
  font-size: 12px;
}

/* ========== Debate (AI Chat) ========== */
.debate-content {
  justify-content: flex-start;
  padding-top: 20px;
  padding-bottom: 100px;
  min-height: 100dvh;
}

.debate-header {
  text-align: center;
  margin-bottom: 24px;
  width: 100%;
}

.debate-header h2 {
  font-size: 20px;
  font-weight: 700;
}

.debate-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

.chat-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-message {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  opacity: 0;
  transform: translateY(16px);
}

.chat-message.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.chat-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

.chat-avatar img {
  width: 100%;
  height: 100%;
}

.chat-avatar.chatgpt { background: rgba(16, 163, 127, 0.15); }
.chat-avatar.gemini { background: rgba(66, 133, 244, 0.15); }
.chat-avatar.claude { background: rgba(217, 119, 87, 0.15); }

.chat-bubble {
  background: var(--bg-card);
  border-radius: 4px 16px 16px 16px;
  padding: 12px 16px;
  max-width: calc(100% - 56px);
}

.chat-name {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 4px;
}

.chat-name.chatgpt-name { color: var(--chatgpt-color); }
.chat-name.gemini-name { color: var(--gemini-color); }
.chat-name.claude-name { color: var(--claude-color); }

.chat-text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.chat-typing {
  display: inline-flex;
  gap: 4px;
  padding: 8px 12px;
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
  40% { transform: translateY(-6px); opacity: 1; }
}

.chat-conclusion {
  width: 100%;
  background: linear-gradient(135deg, rgba(124,92,252,0.15), rgba(66,133,244,0.1));
  border: 1px solid rgba(124,92,252,0.3);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
}

.chat-conclusion.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.conclusion-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.conclusion-text {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
}

.debate-footer {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  padding: 16px 20px;
  background: linear-gradient(transparent, var(--bg-primary) 30%);
}

/* ========== Result Screen ========== */
.result-content {
  justify-content: flex-start;
  padding-top: 24px;
  padding-bottom: 40px;
  gap: 16px;
}

/* ========== Share Area ========== */
.share-area {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
  max-width: 360px;
  margin-top: 8px;
}

.share-btn {
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.share-btn:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.share-icon {
  font-size: 16px;
}

.kakao-btn:hover { border-color: #FEE500; }
.twitter-btn:hover { border-color: #1DA1F2; }

/* ========== Toast ========== */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 100;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ========== Tier Lock (비활성 - 유료 전환 준비) ========== */
/*
 * 유료 전환 시 [data-tier="premium"] 요소에 .locked 추가
 * 현재는 모든 콘텐츠 무료 표시
 */
.locked {
  position: relative;
  user-select: none;
  pointer-events: none;
}

.locked > * {
  filter: blur(6px);
}

.locked::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 15, 0.6);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.lock-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 11;
  text-align: center;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
}

.lock-overlay .lock-icon {
  font-size: 24px;
  margin-bottom: 8px;
}

/* ========== Responsive ========== */
@media (max-width: 380px) {
  .main-title { font-size: 30px; }
  .screen-title { font-size: 20px; }
}

@media (min-width: 481px) {
  #app {
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
  }
}