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

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #1f1f35;
  --bg-input: #16162a;
  --border: #2a2a4a;
  --border-focus: #6c5ce7;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a8;
  --text-muted: #555570;
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-glow: rgba(108, 92, 231, 0.3);
  --success: #00d68f;
  --success-glow: rgba(0, 214, 143, 0.2);
  --error: #ff6b6b;
  --warning: #ffd93d;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --transition: 0.2s ease;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent-light);
  text-decoration: none;
}

a:hover {
  color: var(--accent);
}

/* ===== Layout ===== */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ===== Header / Nav ===== */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header .logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: -0.5px;
}

.site-header nav a {
  margin-left: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.site-header nav a:hover,
.site-header nav a.active {
  color: var(--text-primary);
}

/* ===== Language Switcher ===== */
.lang-switcher {
  background: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.5rem;
  font-size: 0.8rem;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition), color var(--transition);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238888a8'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  padding-right: 1.5rem;
}

.lang-switcher:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.lang-switcher:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.lang-switcher option {
  background: var(--bg-card);
  color: var(--text-primary);
}

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card-hover {
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.card-hover:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(108, 92, 231, 0.15);
}

.card h2 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== Landing Page Grid ===== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.feature-card .icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: block;
}

/* ===== Hero ===== */
.hero {
  text-align: center;
  padding: 3rem 0 1rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

.input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.input-row {
  display: flex;
  gap: 0.75rem;
}

.input-row .input {
  flex: 1;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: #5a4bd4;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.btn-success {
  background: var(--success);
  color: #000;
}

.btn-success:hover:not(:disabled) {
  box-shadow: 0 4px 16px var(--success-glow);
}

/* ===== Step Progress ===== */
.step-progress {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2.5rem;
  gap: 0;
}

.step-item {
  display: flex;
  align-items: center;
}

.step-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  border: 2px solid var(--border);
  color: var(--text-muted);
  background: var(--bg-secondary);
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.step-circle.active {
  border-color: var(--accent);
  color: #fff;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.step-circle.completed {
  border-color: var(--success);
  color: #fff;
  background: var(--success);
}

.step-line {
  width: 48px;
  height: 2px;
  background: var(--border);
  transition: background 0.3s ease;
}

.step-line.completed {
  background: var(--success);
}

/* ===== Step Content ===== */
.step-content {
  display: none;
}

.step-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.step-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.step-desc {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

/* ===== Navigation Buttons ===== */
.step-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  gap: 1rem;
}

.step-nav .btn {
  min-width: 120px;
}

/* ===== Profile Card ===== */
.profile-card {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  padding: 1.25rem;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 1.25rem;
}

.profile-card .avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--bg-card);
  flex-shrink: 0;
}

.profile-card .info h3 {
  font-size: 1.1rem;
  margin-bottom: 0.15rem;
}

.profile-card .info .handle {
  color: var(--accent-light);
  font-size: 0.85rem;
}

.profile-card .info .bio {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 0.35rem;
}

.profile-stats {
  display: flex;
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.profile-stats .stat {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.profile-stats .stat strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ===== Tweet List ===== */
.tweet-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.tweet-item {
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.tweet-item .text {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.tweet-item .meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  gap: 1rem;
}

/* ===== Character Data Display ===== */
.char-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

.char-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
}

.char-card h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent-light);
  margin-bottom: 0.75rem;
}

.char-card .value {
  font-size: 1.1rem;
  font-weight: 600;
}

.char-card .desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.trait-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.trait-bar .name {
  width: 100px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.trait-bar .bar {
  flex: 1;
  height: 8px;
  background: var(--bg-primary);
  border-radius: 4px;
  overflow: hidden;
}

.trait-bar .bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 4px;
  transition: width 0.6s ease;
}

.trait-bar .score {
  font-size: 0.8rem;
  color: var(--text-muted);
  width: 30px;
  text-align: right;
}

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

.tag {
  padding: 0.35rem 0.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.goal-item {
  padding: 0.5rem 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.goal-item:last-child {
  border-bottom: none;
}

/* ===== Passport Visual ===== */
.passport {
  background: linear-gradient(135deg, #1a1a2e, #2a1a3e);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.passport::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 0deg, transparent, var(--accent-glow), transparent, var(--accent-glow), transparent);
  animation: passportGlow 6s linear infinite;
  opacity: 0.3;
}

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

.passport-inner {
  position: relative;
  z-index: 1;
}

.passport .passport-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.passport .passport-id {
  font-family: 'Courier New', monospace;
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.passport .personality-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.passport .archetype-line {
  color: var(--accent-light);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.passport .passport-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.passport .passport-tags .tag {
  border-color: var(--accent);
  color: var(--accent-light);
}

/* ===== Upload Zone ===== */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(108, 92, 231, 0.05);
}

.upload-zone .upload-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  display: block;
  color: var(--text-muted);
}

.upload-zone .upload-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.upload-zone .upload-hint {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-preview {
  margin-top: 1rem;
  display: none;
}

.upload-preview.show {
  display: block;
}

.upload-preview img {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.upload-preview .file-name {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* ===== Secret Key Display ===== */
.key-display {
  text-align: center;
  padding: 2rem 0;
}

.key-display .checkmark {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.5rem;
  border-radius: 50%;
  background: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: #000;
  animation: popIn 0.4s ease;
}

@keyframes popIn {
  0% { transform: scale(0); }
  70% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

.key-display h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.key-display .key-subtitle {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.key-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  max-width: 500px;
  margin: 0 auto;
}

.key-box code {
  flex: 1;
  font-family: 'Courier New', monospace;
  font-size: 0.85rem;
  color: var(--accent-light);
  word-break: break-all;
  text-align: left;
}

.key-box .btn {
  flex-shrink: 0;
}

/* ===== Tweet Content Box ===== */
.tweet-content-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  white-space: pre-wrap;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  position: relative;
}

.tweet-content-box .copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
}

/* ===== Loading Spinner ===== */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent-light);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 15, 0.7);
  z-index: 100;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
}

.loading-overlay.show {
  display: flex;
}

.loading-overlay .spinner {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

.loading-overlay .loading-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ===== Toast ===== */
.toast-container {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
  max-width: 360px;
}

.toast-success {
  background: var(--success);
  color: #000;
}

.toast-error {
  background: var(--error);
  color: #fff;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeOut {
  to { opacity: 0; transform: translateY(-10px); }
}

/* ===== Misc ===== */
.section-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .site-header {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .lang-switcher {
    order: 3;
    margin-left: auto;
  }

  .container {
    padding: 1.25rem 1rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .char-grid {
    grid-template-columns: 1fr;
  }

  .profile-card {
    flex-direction: column;
    text-align: center;
  }

  .profile-stats {
    justify-content: center;
  }

  .step-progress {
    gap: 0;
  }

  .step-line {
    width: 24px;
  }

  .step-circle {
    width: 30px;
    height: 30px;
    font-size: 0.75rem;
  }

  .passport {
    padding: 1.5rem 1rem;
  }

  .key-box {
    flex-direction: column;
  }

  .key-box code {
    text-align: center;
  }

  .step-nav {
    flex-direction: column-reverse;
  }

  .step-nav .btn {
    width: 100%;
  }
}