/**
 * Site Portrait - Main Styles
 * Style: v6 Minimal - IBM Plex Mono, Black & White, Zero Radius
 */

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

/* Variables */
:root {
  --white: #FFFFFF;
  --gray-50: #FAFAFA;
  --gray-100: #F4F4F5;
  --gray-200: #E4E4E7;
  --gray-300: #D4D4D8;
  --gray-400: #A1A1AA;
  --gray-500: #71717A;
  --gray-600: #52525B;
  --gray-900: #18181B;
  --black: #09090B;
  --error: #DC2626;

  --font-mono: 'IBM Plex Mono', 'Noto Sans TC', monospace;
  /* Poster fonts (preserved for poster.css) */
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-typewriter: 'Courier Prime', monospace;
  --font-special: 'Special Elite', cursive;
}

/* Base */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-mono);
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  text-decoration: underline;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--white);
  border-bottom: 1px solid var(--gray-100);
}

.logo {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.nav a {
  color: var(--gray-500);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.nav a:hover {
  color: var(--black);
  text-decoration: none;
}

/* Main - Two Column Split */
.main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
  padding-top: 53px;
}

/* Left: Preview Panel */
.preview-panel {
  background: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  position: relative;
  min-height: calc(100vh - 53px);
}

.preview-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 340px;
  aspect-ratio: 210 / 297;
  border: 1px dashed var(--gray-300);
  background: var(--white);
}

.placeholder-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--gray-400);
}

.placeholder-icon {
  width: 48px;
  height: 48px;
  border: 2px solid var(--gray-300);
  position: relative;
}

.placeholder-icon::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 1px;
  background: var(--gray-300);
  transform: translate(-50%, -50%);
}

.placeholder-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1px;
  height: 20px;
  background: var(--gray-300);
  transform: translate(-50%, -50%);
}

.placeholder-text {
  font-size: 12px;
  letter-spacing: 0.02em;
}

.poster-container {
  width: 100%;
  max-width: 340px;
}

.poster-container:not([hidden]) {
  display: block;
}

/* Right: Control Panel */
.control-panel {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  max-width: 480px;
  overflow-y: auto;
  max-height: calc(100vh - 53px);
}

.panel-section {
  margin-bottom: 28px;
}

.section-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 12px;
}

/* URL Input */
.url-form {
  display: flex;
  border: 1px solid var(--gray-300);
}

.url-form input {
  flex: 1;
  padding: 14px 16px;
  border: none;
  font-family: inherit;
  font-size: 13px;
  background: transparent;
  color: var(--black);
}

.url-form input:focus {
  outline: none;
}

.url-form input::placeholder {
  color: var(--gray-400);
}

.btn-analyze {
  padding: 14px 20px;
  background: var(--black);
  color: var(--white);
  border: none;
  font-family: inherit;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-analyze:hover:not(:disabled) {
  background: var(--gray-900);
}

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

.btn-analyze .btn-loading {
  display: none;
}

.btn-analyze.loading .btn-text {
  display: none;
}

.btn-analyze.loading .btn-loading {
  display: inline-flex;
  align-items: center;
}

.spinner {
  width: 14px;
  height: 14px;
  animation: spin 1s linear infinite;
}

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

/* Error Message */
.error-msg {
  margin-top: 12px;
  padding: 12px;
  background: #FEF2F2;
  border-left: 2px solid var(--error);
  color: var(--error);
  font-size: 12px;
}

.error-msg:not([hidden]) {
  display: block;
}

/* Divider */
.divider {
  height: 1px;
  background: var(--gray-100);
  margin: 24px 0;
}

/* Result Info */
.result-info:not([hidden]) {
  display: block;
}

/* Color Bar */
.color-bar {
  display: flex;
  height: 32px;
}

.color-segment {
  flex: 1;
  transition: transform 0.15s;
}

.color-segment:hover {
  transform: scaleY(1.1);
}

/* Style Select */
.style-select {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.style-tag {
  padding: 8px 12px;
  border: 1px solid var(--gray-300);
  font-size: 11px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.style-tag:hover {
  border-color: var(--black);
}

.style-tag.active {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

/* Metadata Grid */
.metadata-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.metadata-item {
  font-size: 12px;
}

.metadata-key {
  color: var(--gray-500);
  margin-bottom: 4px;
  font-size: 11px;
}

.metadata-value {
  font-weight: 500;
  word-break: break-word;
}

/* Action Buttons */
.action-row {
  display: flex;
  gap: 8px;
}

.btn {
  flex: 1;
  padding: 14px 20px;
  font-family: inherit;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--gray-300);
  color: var(--black);
}

.btn-outline:hover {
  border-color: var(--black);
}

.btn-solid {
  background: var(--black);
  border: 1px solid var(--black);
  color: var(--white);
}

.btn-solid:hover {
  background: var(--gray-900);
}

/* Panel Footer */
.panel-footer {
  margin-top: auto;
  padding-top: 32px;
  font-size: 11px;
  color: var(--gray-500);
}

.panel-footer a {
  color: var(--black);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--black);
  color: var(--white);
  padding: 12px 24px;
  font-size: 12px;
  letter-spacing: 0.02em;
  opacity: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
  z-index: 1000;
}

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

/* Responsive */
@media (max-width: 1100px) {
  .main {
    grid-template-columns: 1fr;
  }

  .preview-panel {
    min-height: 50vh;
    padding: 32px 24px;
  }

  .control-panel {
    max-width: none;
    padding: 32px 24px;
    max-height: none;
  }

  .action-row {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .header {
    padding: 12px 16px;
  }

  .preview-panel {
    padding: 24px 16px;
  }

  .control-panel {
    padding: 24px 16px;
  }

  .url-form {
    flex-direction: column;
  }

  .btn-analyze {
    border-top: 1px solid var(--gray-300);
  }
}