/* ============================================
   Chinese Calligraphy Name - Classical UI
   Inspired by ancient Chinese aesthetics
   ============================================ */

/* ---- CSS Variables ---- */
:root {
  --ink-black: #1a1a1a;
  --ink-light: #3d3d3d;
  --paper-cream: #f5f0e8;
  --paper-warm: #ebe4d4;
  --paper-aged: #e0d5c0;
  --seal-red: #8b1a1a;
  --seal-dark: #5c0f0f;
  --gold-dust: #b8956a;
  --gold-muted: #c4a97a;
  --jade-green: #2d5a4a;
  --jade-dark: #1e3d30;
  --border-subtle: rgba(139, 26, 26, 0.15);
  --shadow-soft: rgba(26, 26, 26, 0.08);
}

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

body {
  font-family: 'Noto Serif SC', 'STSong', 'SimSun', serif;
  line-height: 1.8;
  color: var(--ink-black);
  background-color: var(--paper-cream);
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(200, 180, 150, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(180, 160, 130, 0.08) 0%, transparent 50%);
  min-height: 100vh;
}

/* ---- Container ---- */
.container {
  width: 92%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---- Language Selector ---- */
.lang-selector {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lang-selector label {
  font-size: 0.8rem;
  opacity: 0.6;
  letter-spacing: 0.1em;
}

.lang-selector select {
  background: transparent;
  color: var(--paper-cream);
  border: 1px solid rgba(184, 149, 106, 0.3);
  padding: 0.4rem 0.8rem;
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23b8956a' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  padding-right: 1.8rem;
}

.lang-selector select:hover {
  border-color: rgba(184, 149, 106, 0.6);
}

.lang-selector select:focus {
  outline: none;
  border-color: var(--gold-dust);
}

.lang-selector select option {
  background: var(--ink-black);
  color: var(--paper-cream);
}

/* ---- Header ---- */
header {
  background: var(--ink-black);
  color: var(--paper-cream);
  padding: 3.5rem 0 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 30% 50%, rgba(184, 149, 106, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 70% 30%, rgba(139, 26, 26, 0.06) 0%, transparent 35%);
  pointer-events: none;
}

header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dust), transparent);
  opacity: 0.4;
}

header h1 {
  font-size: 2.8rem;
  font-weight: 400;
  margin-bottom: 0.8rem;
  letter-spacing: 0.3em;
  position: relative;
  z-index: 1;
}

header h1::after {
  content: '';
  display: block;
  width: 60px;
  height: 2px;
  background: var(--seal-red);
  margin: 0.8rem auto 0;
  opacity: 0.6;
}

header p {
  font-size: 1rem;
  opacity: 0.6;
  letter-spacing: 0.15em;
  font-weight: 300;
  position: relative;
  z-index: 1;
}

/* ---- Main ---- */
main {
  min-height: calc(100vh - 220px);
  padding: 3rem 0;
}

/* ---- Section Title ---- */
.section-title {
  text-align: center;
  margin-bottom: 2.5rem;
  position: relative;
}

.section-title h2 {
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--ink-black);
  letter-spacing: 0.2em;
  display: inline-block;
  position: relative;
  padding: 0 1.5rem;
}

.section-title h2::before,
.section-title h2::after {
  content: '◆';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.4rem;
  color: var(--seal-red);
  opacity: 0.5;
}

.section-title h2::before {
  left: 0;
}

.section-title h2::after {
  right: 0;
}

/* ---- Input Section ---- */
.input-section {
  padding: 2rem 0 3rem;
  margin-bottom: 2rem;
}

#name-form {
  max-width: 520px;
  margin: 0 auto;
  background: var(--paper-warm);
  padding: 2.5rem;
  border: 1px solid var(--border-subtle);
  position: relative;
}

#name-form::before {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  right: 4px;
  bottom: 4px;
  border: 1px solid var(--border-subtle);
  pointer-events: none;
}

.input-group {
  margin-bottom: 1.8rem;
  position: relative;
}

.input-group label {
  display: block;
  margin-bottom: 0.6rem;
  color: var(--ink-light);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
}

.input-group input,
.input-group select {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--paper-aged);
  border-radius: 0;
  font-size: 1rem;
  font-family: inherit;
  background: var(--paper-cream);
  color: var(--ink-black);
  transition: all 0.3s ease;
}

.input-group input:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--seal-red);
  box-shadow: inset 0 0 0 1px var(--seal-red);
}

.input-group input::placeholder {
  color: #aaa;
  font-style: italic;
}

/* ---- Buttons ---- */
button {
  background: var(--ink-black);
  color: var(--paper-cream);
  border: none;
  padding: 0.9rem 2.5rem;
  font-size: 1rem;
  border-radius: 0;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-block;
  font-family: inherit;
  letter-spacing: 0.15em;
  position: relative;
  overflow: hidden;
}

button::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--seal-red);
  transition: width 0.3s ease;
}

button:hover {
  background: var(--ink-light);
}

button:hover::after {
  width: 100%;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--seal-red);
}

.btn-primary:hover {
  background: var(--seal-dark);
}

.btn-primary::after {
  background: var(--gold-dust);
}

/* ---- Results Section ---- */
.results-section {
  padding: 2rem 0;
}

/* ---- Name Cards ---- */
.name-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.name-card {
  background: var(--paper-warm);
  padding: 2rem 1.5rem;
  text-align: center;
  border: 1px solid transparent;
  transition: all 0.4s ease;
  position: relative;
  cursor: pointer;
}

.name-card::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 6px;
  right: 6px;
  bottom: 6px;
  border: 1px solid transparent;
  transition: all 0.4s ease;
  pointer-events: none;
}

.name-card:hover {
  border-color: var(--border-subtle);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--shadow-soft);
}

.name-card:hover::before {
  border-color: var(--border-subtle);
}

.name-card.selected {
  border-color: var(--seal-red);
  background: var(--paper-cream);
}

.name-card.selected::before {
  border-color: rgba(139, 26, 26, 0.3);
}

.name-chinese {
  font-size: 2.4rem;
  font-weight: 400;
  color: var(--ink-black);
  margin: 0.5rem 0;
  font-family: 'Noto Serif SC', 'KaiTi', serif;
  letter-spacing: 0.1em;
}

.name-pinyin {
  font-size: 1rem;
  color: var(--gold-dust);
  margin-bottom: 0.8rem;
  letter-spacing: 0.1em;
  font-style: italic;
}

.name-meaning {
  font-size: 0.9rem;
  color: var(--ink-light);
  line-height: 1.7;
  opacity: 0.8;
}

.select-btn {
  background: transparent;
  color: var(--seal-red);
  border: 1px solid var(--seal-red);
  margin-top: 1.2rem;
  padding: 0.5rem 1.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

.select-btn:hover {
  background: var(--seal-red);
  color: var(--paper-cream);
}

.select-btn::after {
  display: none;
}

/* ---- Signature Preview ---- */
.signature-preview {
  background: var(--paper-warm);
  padding: 2.5rem;
  margin-top: 2.5rem;
  border: 1px solid var(--border-subtle);
  position: relative;
}

.signature-preview::before {
  content: '';
  position: absolute;
  top: 5px;
  left: 5px;
  right: 5px;
  bottom: 5px;
  border: 1px solid var(--border-subtle);
  pointer-events: none;
  opacity: 0.5;
}

/* ---- Style Options ---- */
.signature-styles {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0;
}

.style-option {
  display: flex;
  align-items: center;
}

.style-option label {
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

.style-option label:hover {
  border-color: var(--border-subtle);
  background: rgba(139, 26, 26, 0.03);
}

.style-option input[type="radio"] {
  appearance: none;
  width: 14px;
  height: 14px;
  border: 1px solid var(--paper-aged);
  border-radius: 50%;
  margin-right: 0.5rem;
  position: relative;
  cursor: pointer;
  transition: all 0.3s ease;
}

.style-option input[type="radio"]:checked {
  border-color: var(--seal-red);
}

.style-option input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background: var(--seal-red);
  border-radius: 50%;
}

.style-option input[type="radio"]:checked + span,
.style-option input[type="radio"]:checked {
  color: var(--seal-red);
}

/* ---- Canvas Container ---- */
#signature-canvas-container {
  margin: 2rem auto;
  width: fit-content;
  min-width: 420px;
  min-height: 180px;
  padding: 1.5rem;
  background: var(--paper-cream);
  border: 1px solid var(--paper-aged);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

#signature-canvas-container::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  bottom: 8px;
  border: 1px solid var(--paper-aged);
  pointer-events: none;
  opacity: 0.5;
}

#signature-canvas {
  background: white;
  border: 1px solid var(--paper-aged);
  max-width: 100%;
}

/* ---- Loading ---- */
#loading-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  gap: 1rem;
}

#loading-indicator p {
  color: var(--ink-light);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 2px solid var(--paper-aged);
  border-top-color: var(--seal-red);
  border-radius: 50%;
  animation: spin 1.2s linear infinite;
}

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

/* ---- Placeholder ---- */
#signature-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  min-width: 300px;
  min-height: 120px;
}

#signature-placeholder p {
  color: #aaa;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  font-style: italic;
}

/* ---- Action Buttons ---- */
.action-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

/* ---- Footer ---- */
footer {
  background: var(--ink-black);
  color: var(--paper-cream);
  text-align: center;
  padding: 2rem 0;
  margin-top: auto;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dust), transparent);
  opacity: 0.3;
}

footer p {
  font-size: 0.85rem;
  opacity: 0.5;
  letter-spacing: 0.1em;
}

/* ---- Hidden ---- */
.hidden {
  display: none !important;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .lang-selector {
    top: 0.5rem;
    right: 0.8rem;
  }

  .lang-selector select {
    padding: 0.3rem 0.6rem;
    padding-right: 1.6rem;
    font-size: 0.8rem;
  }

  header h1 {
    font-size: 2rem;
    letter-spacing: 0.2em;
  }

  header p {
    font-size: 0.9rem;
  }

  #name-form {
    padding: 1.8rem;
  }

  .name-chinese {
    font-size: 2rem;
  }

  .signature-styles {
    gap: 0.3rem;
  }

  .style-option label {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
  }

  #signature-canvas-container {
    min-width: auto;
    width: 100%;
  }

  .action-buttons {
    flex-direction: column;
    align-items: center;
  }

  button {
    width: 100%;
    max-width: 280px;
  }
}