/* ============================================================
   16 Types Personality Insights — App Styles
   Chat-based UI, Mobile-first, 2025 Design Trends
   ============================================================ */

/* ---------- Base & Layout ---------- */
:root {
  --app-primary:      #8B5CF6;
  --app-primary-dark:  #7C3AED;
  --app-accent:        #EC4899;
  --app-bg:            #F8FAFC;
  --app-bg-alt:        #F1F5F9;
  --app-surface:       #FFFFFF;
  --app-text:          #0F172A;
  --app-text-sec:      #64748B;
  --app-text-ter:      #94A3B8;
  --app-border:        rgba(0, 0, 0, 0.06);
  --app-glass:         rgba(255, 255, 255, 0.65);
  --app-glass-border:  rgba(255, 255, 255, 0.30);
  --app-shadow:        0 4px 20px rgba(0, 0, 0, 0.08);
  --app-radius:        1rem;
  --app-radius-lg:     1.5rem;
  --app-radius-full:   9999px;
  --app-font:          'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --app-ease:          cubic-bezier(0.16, 1, 0.3, 1);
  --app-spring:        cubic-bezier(0.34, 1.56, 0.64, 1);
  --header-h:          56px;
  --safe-bottom:       env(safe-area-inset-bottom, 0px);
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --app-bg:           #0F172A;
    --app-bg-alt:       #1E293B;
    --app-surface:      #1E293B;
    --app-text:         #F1F5F9;
    --app-text-sec:     #94A3B8;
    --app-text-ter:     #64748B;
    --app-border:       rgba(255, 255, 255, 0.08);
    --app-glass:        rgba(30, 41, 59, 0.70);
    --app-glass-border: rgba(255, 255, 255, 0.08);
    --app-shadow:       0 4px 20px rgba(0, 0, 0, 0.3);
  }
}
[data-theme="dark"] {
  --app-bg:           #0F172A;
  --app-bg-alt:       #1E293B;
  --app-surface:      #1E293B;
  --app-text:         #F1F5F9;
  --app-text-sec:     #94A3B8;
  --app-text-ter:     #64748B;
  --app-border:       rgba(255, 255, 255, 0.08);
  --app-glass:        rgba(30, 41, 59, 0.70);
  --app-glass-border: rgba(255, 255, 255, 0.08);
  --app-shadow:       0 4px 20px rgba(0, 0, 0, 0.3);
}

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

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

body {
  font-family: var(--app-font);
  color: var(--app-text);
  background: var(--app-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--app-primary); text-decoration: none; }
button { cursor: pointer; border: none; background: transparent; font-family: inherit; }
img { max-width: 100%; display: block; }

/* ---------- App Shell ---------- */
.app {
  max-width: 480px;
  margin: 0 auto;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* ---------- App Header ---------- */
.app-header {
  position: relative;
  z-index: 100;
  height: var(--header-h);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  background: var(--app-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--app-glass-border);
  flex-shrink: 0;
}

.app-header-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.app-header-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--app-text-sec);
  transition: all 0.2s ease;
}

.app-header-btn:hover {
  background: var(--app-border);
  color: var(--app-text);
}

.app-header-btn svg {
  width: 20px;
  height: 20px;
}

/* ---------- Screens ---------- */
.screen {
  flex: 1;
  display: none;
  flex-direction: column;
  min-height: 0;
}

.screen.active {
  display: flex;
  animation: screenIn 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) both;
}

@keyframes screenIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Start Screen ---------- */
.start-screen {
  padding: 2rem 1.5rem;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

.start-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}

.start-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.start-gradient {
  background: linear-gradient(135deg, var(--app-primary), var(--app-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.start-desc {
  font-size: 0.9375rem;
  color: var(--app-text-sec);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 340px;
}

.start-disclaimer {
  font-size: 0.75rem;
  color: var(--app-text-ter);
  margin-bottom: 2rem;
  max-width: 300px;
  line-height: 1.5;
}

.level-cards {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 360px;
}

.level-card {
  position: relative;
  padding: 1.25rem 1.5rem;
  border-radius: var(--app-radius);
  border: 1px solid var(--app-border);
  background: var(--app-surface);
  text-align: left;
  transition: all 0.3s var(--app-spring);
  overflow: hidden;
}

.level-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--app-primary), var(--app-accent));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.level-card:hover {
  transform: scale(1.02);
  box-shadow: var(--app-shadow);
  border-color: var(--app-primary);
}

.level-card:hover::before {
  opacity: 1;
}

.level-card:active {
  transform: scale(0.98);
}

.level-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.25rem;
}

.level-name {
  font-size: 1rem;
  font-weight: 700;
}

.level-badge {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.25rem 0.625rem;
  border-radius: var(--app-radius-full);
  background: rgba(139, 92, 246, 0.1);
  color: var(--app-primary);
}

.level-desc {
  font-size: 0.8125rem;
  color: var(--app-text-sec);
}

/* ---------- Chat Screen ---------- */
.chat-screen {
  position: relative;
  flex-direction: column;
  min-height: 0;
}

.chat-progress {
  position: relative;
  z-index: 50;
  padding: 0.75rem 1rem;
  background: var(--app-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--app-glass-border);
  flex-shrink: 0;
}

.progress-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
  color: var(--app-text-sec);
  font-weight: 600;
}

.progress-bar-bg {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--app-border);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--app-primary), var(--app-accent));
  transition: width 0.5s var(--app-ease);
  min-width: 0;
}

/* Chat Area */
.chat-area {
  flex: 1;
  min-height: 0;
  padding: 1rem 1rem 0.5rem;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
}

/* Push messages to bottom when few messages */
.chat-area::before {
  content: '';
  flex: 1;
  min-height: 0;
}

/* Chat Bubbles — iMessage-style */
.chat-row {
  display: flex;
  margin-bottom: 0.5rem;
  opacity: 0;
  transform: translateY(24px) scale(0.94);
  animation: bubbleIn 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  flex-shrink: 0;
}

.chat-row--fast {
  animation-duration: 0.05s;
}

@keyframes bubbleIn {
  0%   { opacity: 0; transform: translateY(24px) scale(0.94); }
  30%  { opacity: 0.6; }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

.chat-row--bot {
  justify-content: flex-start;
  transform-origin: bottom left;
}

.chat-row--user {
  justify-content: flex-end;
  transform-origin: bottom right;
}

/* Bot avatar circle */
.chat-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--app-primary), var(--app-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  margin-right: 8px;
  align-self: flex-end;
  margin-bottom: 2px;
}

.chat-bubble {
  max-width: 80%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  line-height: 1.55;
  position: relative;
  word-break: break-word;
}

.chat-bubble--bot {
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: 18px 18px 18px 4px;
  color: var(--app-text);
}

.chat-bubble--user {
  background: linear-gradient(135deg, var(--app-primary), var(--app-primary-dark));
  color: #fff;
  border-radius: 18px 18px 4px 18px;
  box-shadow: 0 2px 8px rgba(139, 92, 246, 0.25);
}

/* Consecutive same-sender spacing */
.chat-row--bot + .chat-row--bot { margin-top: -0.25rem; }
.chat-row--user + .chat-row--user { margin-top: -0.25rem; }
.chat-row--bot + .chat-row--bot .chat-avatar { visibility: hidden; }
.chat-row--bot + .chat-row--bot .chat-bubble--bot { border-radius: 18px 18px 18px 4px; }

/* Timestamp (optional, for chat feel) */
.chat-time {
  font-size: 0.625rem;
  color: var(--app-text-ter);
  margin-top: 0.25rem;
  padding: 0 0.25rem;
}

/* Typing indicator — iMessage style */
.typing-dots {
  display: inline-flex;
  gap: 5px;
  padding: 6px 2px;
  align-items: center;
}

.typing-dots span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--app-text-ter);
  animation: iosTyping 1.4s ease-in-out infinite;
}

.typing-dots span:nth-child(1) { animation-delay: 0s; }
.typing-dots span:nth-child(2) { animation-delay: 0.15s; }
.typing-dots span:nth-child(3) { animation-delay: 0.3s; }

@keyframes iosTyping {
  0%   { opacity: 0.35; transform: translateY(0); }
  25%  { opacity: 1;    transform: translateY(-4px); }
  50%  { opacity: 0.35; transform: translateY(0); }
  100% { opacity: 0.35; transform: translateY(0); }
}

/* Answer Buttons — Fixed at bottom of chat screen */
.answer-area {
  position: relative;
  flex-shrink: 0;
  width: 100%;
  padding: 0.625rem 1rem calc(0.625rem + var(--safe-bottom));
  background: var(--app-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid var(--app-glass-border);
  display: flex;
  gap: 0.5rem;
  z-index: 50;
  min-height: 0;
}

/* When empty, collapse completely */
.answer-area:empty {
  padding: 0;
  border-top: none;
  min-height: 0;
  height: 0;
}

.answer-btn {
  flex: 1;
  padding: 0.8125rem 1rem;
  border-radius: 14px;
  font-size: 0.875rem;
  font-weight: 600;
  text-align: center;
  border: 1.5px solid var(--app-border);
  background: var(--app-surface);
  color: var(--app-text);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  opacity: 0;
  transform: translateY(16px);
  animation: answerBtnIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  line-height: 1.35;
}

.answer-btn:nth-child(2) {
  animation-delay: 0.12s;
}

@keyframes answerBtnIn {
  0%   { opacity: 0; transform: translateY(16px) scale(0.94); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

.answer-btn:hover {
  border-color: var(--app-primary);
  background: rgba(139, 92, 246, 0.06);
  box-shadow: 0 2px 12px rgba(139, 92, 246, 0.12);
}

.answer-btn:active {
  transform: scale(0.96);
  transition-duration: 0.1s;
}

/* Edit button on past answers — always visible */
.edit-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 0.6875rem;
  color: rgba(255,255,255,0.6);
  cursor: pointer;
  margin-top: 6px;
  padding: 3px 10px;
  border-radius: var(--app-radius-full);
  background: rgba(255,255,255,0.15);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.edit-badge:hover,
.edit-badge:active {
  background: rgba(255,255,255,0.28);
  color: rgba(255,255,255,0.95);
}

/* ---------- Result Screen ---------- */
.result-screen {
  padding: 1.5rem;
  padding-bottom: 3rem;
  align-items: center;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

.result-card {
  width: 100%;
  border-radius: var(--app-radius-lg);
  overflow: hidden;
  box-shadow: var(--app-shadow);
  background: var(--app-surface);
  margin-bottom: 1.5rem;
}

.result-hero {
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: #fff;
  position: relative;
}

.result-emoji {
  font-size: 3.5rem;
  margin-bottom: 0.75rem;
  animation: float 3s ease-in-out infinite;
}

.result-code {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.result-name {
  font-size: 1.25rem;
  font-weight: 600;
  opacity: 0.9;
}

.result-name-en {
  font-size: 0.875rem;
  opacity: 0.7;
  margin-top: 0.25rem;
}

/* Percentages */
.result-percentages {
  padding: 1.5rem;
  border-bottom: 1px solid var(--app-border);
}

.pct-row {
  margin-bottom: 1rem;
}

.pct-row:last-child { margin-bottom: 0; }

.pct-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--app-text-sec);
  margin-bottom: 0.375rem;
}

.pct-labels .active { color: var(--app-primary); font-weight: 700; }

.pct-bar-bg {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--app-border);
  overflow: hidden;
  position: relative;
}

.pct-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--app-primary), var(--app-accent));
  transition: width 1s var(--app-ease);
}

/* Result Body */
.result-body {
  padding: 1.5rem;
}

.result-section {
  margin-bottom: 1.5rem;
}

.result-section:last-child { margin-bottom: 0; }

.result-section h3 {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--app-primary);
  margin-bottom: 0.75rem;
}

.result-section p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--app-text-sec);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  padding: 0.375rem 0.875rem;
  border-radius: var(--app-radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  background: rgba(139, 92, 246, 0.08);
  color: var(--app-primary);
}

/* Share Section */
.share-section {
  width: 100%;
  margin-bottom: 1.5rem;
}

.share-section h3 {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--app-text-sec);
  margin-bottom: 0.75rem;
  text-align: center;
}

.share-btns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

.share-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
  padding: 0.75rem;
  border-radius: var(--app-radius);
  border: 1px solid var(--app-border);
  background: var(--app-surface);
  color: var(--app-text);
  font-size: 0.6875rem;
  font-weight: 600;
  transition: all 0.2s var(--app-spring);
}

.share-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.share-btn:active { transform: scale(0.95); }

.share-btn svg {
  width: 24px;
  height: 24px;
}

.share-btn--x     { color: #000; }
.share-btn--kakao { color: #FEE500; }
.share-btn--insta { color: #E4405F; }
.share-btn--copy  { color: var(--app-primary); }

[data-theme="dark"] .share-btn--x { color: #fff; }

.retry-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  max-width: 320px;
  padding: 1rem;
  border-radius: var(--app-radius);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--app-primary), var(--app-accent));
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.3);
  transition: all 0.3s var(--app-spring);
}

.retry-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

.retry-btn:active { transform: scale(0.97); }

.home-link {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--app-text-sec);
}

/* ---------- Loading Screen ---------- */
.loading-screen {
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  gap: 2rem;
  overflow: hidden;
}

.loading-spinner {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 3px solid var(--app-border);
  border-top-color: var(--app-primary);
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--app-text);
}

.loading-sub {
  font-size: 0.875rem;
  color: var(--app-text-sec);
  margin-top: 0.5rem;
}

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

.loading-bar-value {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--app-primary), var(--app-accent));
  animation: loadProgress 2.5s var(--app-ease) forwards;
}

@keyframes loadProgress {
  0%   { width: 0%; }
  30%  { width: 40%; }
  60%  { width: 70%; }
  90%  { width: 90%; }
  100% { width: 100%; }
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 5rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 0.75rem 1.5rem;
  border-radius: var(--app-radius-full);
  background: var(--app-text);
  color: var(--app-bg);
  font-size: 0.875rem;
  font-weight: 600;
  opacity: 0;
  transition: all 0.3s var(--app-ease);
  z-index: 200;
  pointer-events: none;
  white-space: nowrap;
}

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

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

@media (min-width: 768px) {
  body {
    background: var(--app-bg-alt);
  }
  .app {
    margin-top: 2rem;
    margin-bottom: 2rem;
    border-radius: var(--app-radius-lg);
    height: calc(100vh - 4rem);
    box-shadow: var(--app-shadow);
  }
  .app-header {
    border-radius: var(--app-radius-lg) var(--app-radius-lg) 0 0;
  }
}

/* ---------- Accessibility ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 2px solid var(--app-primary);
  outline-offset: 2px;
}

/* ---------- Scrollbar ---------- */
.chat-area::-webkit-scrollbar { width: 4px; }
.chat-area::-webkit-scrollbar-track { background: transparent; }
.chat-area::-webkit-scrollbar-thumb {
  background: var(--app-border);
  border-radius: 2px;
}

/* ---------- Canvas for Share Image ---------- */
.share-canvas-container {
  position: fixed;
  top: -9999px;
  left: -9999px;
  z-index: -1;
}

/* ---------- App Footer ---------- */
.app-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--app-border);
  font-size: 12px;
  color: var(--app-text-ter);
  flex-wrap: wrap;
}

.app-footer-sep {
  opacity: 0.4;
}

.app-footer-link {
  color: var(--app-text-ter);
  text-decoration: none;
  transition: color 0.2s;
}

.app-footer-link:hover {
  color: var(--app-primary);
}

/* ---------- SEO Content (visually hidden, crawlable) ---------- */
.seo-content {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}