/* ========================================
   ??? AI ?? � ????
   ======================================== */

:root {
  --color-bg: #f7f7f8;
  --color-black: #111111;
  --color-white: #ffffff;
  --color-gray-50: #f3f3f4;
  --color-gray-100: #ececed;
  --color-gray-200: #e2e2e4;
  --color-gray-300: #c8c8cc;
  --color-gray-400: #9b9ba1;
  --color-gray-500: #6b6b6f;
  --color-gray-600: #4a4a4f;
  --color-text-primary: #111111;
  --color-text-secondary: #6b6b6f;
  --color-text-tertiary: #9b9ba1;
  --color-accent-pink: #ff4d94;
  --color-accent-blue: #4a90e2;
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-subtle: rgba(0, 0, 0, 0.05);
  --radius-sm: 10px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 2px 4px rgba(0, 0, 0, 0.04), 0 8px 28px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.03), 0 12px 32px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.06), 0 24px 48px rgba(0, 0, 0, 0.1);
  --shadow-player: 0 -1px 2px rgba(0, 0, 0, 0.04), 0 -4px 16px rgba(0, 0, 0, 0.06);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --config-card-height: 56px;
  --panel-padding-x: 20px;
  --panel-padding-y: 24px;
  --config-panel-width: 360px;
}

* {
  box-sizing: border-box;
}

body {
  background: var(--color-bg);
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'kern' 1, 'liga' 1;
  letter-spacing: -0.011em;
}

/* ---- Logo mark (animated GIF) ---- */
.logo-wave-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  background: transparent;
}

.logo-wave-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

@media (prefers-reduced-motion: reduce) {
  .logo-wave-img {
    animation: none;
  }
}

/* ---- Header ---- */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(247, 247, 248, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--color-border-subtle);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.brand-link:hover .brand-name,
.brand-link:hover .site-tagline {
  opacity: 0.75;
}

.brand-name {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--color-text-primary);
  transition: opacity var(--transition);
}

.site-tagline {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.4;
  color: var(--color-text-primary);
  transition: opacity var(--transition);
}

@media (min-width: 768px) {
  .site-tagline {
    font-size: 21px;
  }
}

.btn-login {
  padding: 9px 22px;
  background: var(--color-black);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn-login:hover {
  background: #2a2a2a;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-login:active {
  transform: translateY(0);
}

/* ---- ???? ---- */
.user-menu {
  position: relative;
}

.avatar-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-black);
  color: var(--color-white);
  border: none;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.avatar-btn:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 280px;
  max-width: 320px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-md);
  z-index: 50;
  animation: dropdown-in 0.15s ease;
}

@keyframes dropdown-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.user-email {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 8px;
  word-break: break-all;
  letter-spacing: -0.01em;
}

.user-credits {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 8px 0;
}

.user-credits strong {
  font-size: 17px;
  color: var(--color-text-primary);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.user-credits-value {
  display: flex;
  align-items: center;
  gap: 8px;
}

.credit-delta {
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  animation: credit-pop 0.35s ease;
}

.credit-delta.is-plus {
  color: #0d7a3e;
  background: rgba(13, 122, 62, 0.12);
}

.credit-delta.is-minus {
  color: #c0392b;
  background: rgba(192, 57, 43, 0.1);
}

@keyframes credit-pop {
  from { opacity: 0; transform: translateY(4px) scale(0.92); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.btn-buy-credits {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  margin: 10px 0 12px;
  padding: 11px 16px;
  border: none;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #1a1a1a 0%, #333 100%);
  color: var(--color-white);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}

.btn-buy-credits:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.16);
}

.btn-buy-credits svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.auth-forgot-wrap {
  margin: 0 0 12px;
  text-align: center;
  font-size: 13px;
}

.auth-forgot-wrap.hidden {
  display: none;
}

/* Credits shop modal */
.credits-shop-overlay {
  z-index: 110;
  overflow: hidden;
  padding: 20px;
}

.credits-shop-overlay .modal-content.credits-shop {
  position: relative;
  z-index: 1;
  text-align: left;
  width: min(100%, 680px);
  max-width: 680px;
  padding: 32px 32px 26px;
  max-height: none;
  overflow: visible;
  box-sizing: border-box;
}

.credits-shop-header {
  text-align: center;
  margin-bottom: 32px;
  padding-right: 0;
}

.credits-shop-title {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0 0 8px;
  color: var(--color-text-primary);
}

.credits-shop-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin: 0 0 16px;
  line-height: 1.6;
}

.credits-shop-notice {
  margin: 0 0 14px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  background: #fff8e6;
  border: 1px solid #f5d78e;
  font-size: 12px;
  font-weight: 500;
  color: #8a6d1d;
  line-height: 1.5;
  text-align: center;
}

.credits-shop-notice.hidden {
  display: none;
}

.credits-shop-balance {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--color-gray-50);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 13px;
  color: var(--color-text-secondary);
}

.credits-shop-balance strong {
  font-size: 18px;
  color: var(--color-text-primary);
  font-weight: 700;
}

.credits-shop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

@media (max-width: 720px) {
  .credits-shop-overlay .modal-content.credits-shop {
    width: calc(100vw - 32px);
    padding: 32px 20px 24px;
  }

  .credits-shop-grid {
    grid-template-columns: 1fr;
  }
}

.credits-pack {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 18px 16px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.credits-pack:hover {
  border-color: var(--color-gray-300);
  box-shadow: var(--shadow-sm);
}

.credits-pack.is-popular {
  border: 2px solid var(--color-black);
  padding-top: 22px;
  box-shadow: var(--shadow-md);
}

.credits-pack.is-popular .credits-pack-title {
  padding-right: 52px;
}

.credits-pack-badge {
  position: absolute;
  top: 10px;
  right: 12px;
  left: auto;
  transform: none;
  padding: 3px 10px;
  background: var(--color-black);
  color: var(--color-white);
  font-size: 10px;
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
  line-height: 1.3;
}

.credits-pack-title {
  font-size: 15px;
  font-weight: 600;
  margin: 4px 0 4px;
  letter-spacing: -0.02em;
}

.credits-pack-desc {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin: 0 0 14px;
  min-height: 18px;
}

.credits-pack-amount {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 4px;
}

.credits-pack-num {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
}

.credits-pack-unit {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.credits-pack-unitprice {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin: 0 0 12px;
}

.credits-pack-price {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 14px;
}

.credits-pack-price span {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.credits-pack-buy {
  margin-top: auto;
  width: 100%;
  padding: 11px 0;
  border: none;
  border-radius: var(--radius-full);
  background: var(--color-gray-100);
  color: var(--color-text-primary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.credits-pack.is-popular .credits-pack-buy {
  background: var(--color-black);
  color: var(--color-white);
}

.credits-pack-buy:hover:not(:disabled) {
  opacity: 0.88;
}

.credits-pack-buy:disabled,
.credits-pack-buy--closed {
  opacity: 0.72;
  cursor: not-allowed;
  background: var(--color-gray-100) !important;
  color: var(--color-text-tertiary) !important;
}

.credits-pack.is-popular .credits-pack-buy--closed {
  background: var(--color-gray-200) !important;
  color: var(--color-text-secondary) !important;
}

.credits-shop-foot {
  margin: 20px 0 0;
  text-align: center;
  font-size: 12px;
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

.credit-ledger-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--color-gray-100);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.credit-ledger-entry:hover {
  color: var(--color-text-primary);
}

.credit-ledger-entry svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-gray-400);
}

.credit-ledger-entry.is-active {
  color: var(--color-text-primary);
  pointer-events: none;
}

.credit-ledger {
  list-style: none;
  margin: 0;
  padding: 0;
}

.credit-ledger--page {
  overflow: visible;
}

.credit-ledger-empty {
  font-size: 12px;
  color: var(--color-text-tertiary);
  padding: 8px 0;
}

.credit-ledger-item {
  padding: 8px 0;
  border-top: 1px solid var(--color-gray-100);
}

.credit-ledger-item:first-child {
  border-top: none;
}

.credit-ledger-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 13px;
}

.credit-ledger-label {
  color: var(--color-text-secondary);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.credit-ledger-change {
  font-weight: 600;
  flex-shrink: 0;
}

.credit-ledger-item.is-plus .credit-ledger-change {
  color: #0d7a3e;
}

.credit-ledger-item.is-minus .credit-ledger-change {
  color: #c0392b;
}

.credit-ledger-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 4px;
  font-size: 11px;
  color: var(--color-text-tertiary);
}

.header--subpage {
  border-bottom: 1px solid var(--color-border-subtle);
}

.subpage-header-left {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.subpage-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 8px 4px 8px 0;
  margin: 0 4px 0 0;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color var(--transition);
  flex-shrink: 0;
}

.subpage-back-btn:hover {
  color: var(--color-text-primary);
}

.subpage-back-btn svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.subpage-header-title {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ledger-body {
  background: var(--color-bg);
}

.ledger-page {
  padding-top: 36px;
}

.ledger-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-white);
  box-shadow: var(--shadow-card);
  min-height: 420px;
  overflow: hidden;
}

/* --- Typography scale: label 13 / body 15 / title 17 / display 36 --- */

.ledger-overview {
  padding: 32px 36px 28px;
}

.ledger-overview-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px 48px;
  align-items: end;
  margin: 0;
}

.ledger-overview-grid dt,
.ledger-overview-grid dd {
  margin: 0;
}

.ledger-field {
  margin: 0;
  min-width: 0;
}

.ledger-field--balance {
  text-align: right;
}

.ledger-field-label {
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-text-secondary);
  margin: 0 0 8px;
}

.ledger-field-value {
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.ledger-field-value--email {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.35;
  color: var(--color-text-primary);
  word-break: break-all;
}

.ledger-field-value--balance {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--color-text-primary);
}

.ledger-panel-divider {
  height: 1px;
  background: var(--color-border-subtle);
  margin: 0;
}

.ledger-records {
  padding: 28px 36px 32px;
}

.ledger-section-header {
  margin-bottom: 20px;
}

.ledger-section-title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--color-text-primary);
  margin: 0 0 4px;
}

.ledger-section-desc {
  font-size: 13px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-text-tertiary);
  margin: 0;
}

.credit-ledger--page .credit-ledger-item {
  padding: 18px 0;
}

.credit-ledger--page .credit-ledger-item:first-child {
  padding-top: 0;
}

.credit-ledger--page .credit-ledger-row {
  font-size: 15px;
  line-height: 1.4;
}

.credit-ledger--page .credit-ledger-label {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-primary);
}

.credit-ledger--page .credit-ledger-change {
  font-size: 16px;
  font-weight: 600;
}

.credit-ledger--page .credit-ledger-meta {
  margin-top: 6px;
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-tertiary);
}

.credit-ledger--page .credit-ledger-meta span:first-child {
  color: var(--color-text-secondary);
  font-weight: 500;
}

.credit-ledger--page .credit-ledger-empty {
  font-size: 14px;
  padding: 24px 0;
  color: var(--color-text-tertiary);
}

@media (max-width: 640px) {
  .ledger-overview {
    padding: 24px 20px 20px;
  }

  .ledger-overview-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    align-items: start;
  }

  .ledger-field--balance {
    text-align: left;
    padding-top: 20px;
    border-top: 1px solid var(--color-border-subtle);
  }

  .ledger-field-value--balance {
    font-size: 32px;
  }

  .ledger-records {
    padding: 22px 20px 26px;
  }

  .subpage-header-left {
    gap: 12px;
  }
}

.dropdown-divider {
  border: none;
  border-top: 1px solid var(--color-gray-200);
  margin: 8px 0;
}

.dropdown-item {
  display: block;
  width: 100%;
  padding: 10px 0;
  background: none;
  border: none;
  text-align: left;
  font-size: 14px;
  color: var(--color-gray-600);
  cursor: pointer;
  transition: color var(--transition);
}

.dropdown-item:hover {
  color: var(--color-black);
}

.dropdown-item-danger:hover {
  color: #dc2626;
}

.app-status-banner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  background: #fff8e6;
  border-bottom: 1px solid #f0e4b8;
  color: #7a5c12;
  font-size: 13px;
  line-height: 1.5;
}

.app-status-banner.hidden {
  display: none;
}

.app-status-banner-text {
  margin: 0;
  flex: 1;
}

.app-status-banner-close {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  color: inherit;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  border-radius: 6px;
  opacity: 0.7;
}

.app-status-banner-close:hover {
  opacity: 1;
  background: rgba(0, 0, 0, 0.06);
}

.main-content {
  padding-top: 36px;
  overflow: visible;
}

.workspace-card {
  display: grid;
  grid-template-columns: 1fr var(--config-panel-width);
  align-items: stretch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: visible;
  min-height: 480px;
  background: var(--color-white);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition);
}

.workspace-card:hover {
  box-shadow: var(--shadow-card-hover);
}

.text-panel {
  display: flex;
  flex-direction: column;
  padding: var(--panel-padding-y) var(--panel-padding-x);
  position: relative;
  min-height: 0;
}

.text-input {
  flex: 1;
  width: 100%;
  min-height: 400px;
  border: none;
  outline: none;
  resize: none;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: -0.011em;
  color: var(--color-text-primary);
  background: transparent;
  font-family: inherit;
}

.text-input::placeholder {
  color: var(--color-text-tertiary);
  font-weight: 400;
}

.char-counter {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  margin-top: 16px;
  user-select: none;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.credit-cost-hint {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.char-counter.warning {
  color: #f59e0b;
}

.char-counter.limit {
  color: #dc2626;
}

.config-panel {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  border-left: 1px solid var(--color-border-subtle);
  background: var(--color-gray-50);
  padding: var(--panel-padding-y) var(--panel-padding-x);
  gap: 20px;
  overflow: visible;
}

.config-group {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 10px;
  overflow: visible;
  position: relative;
  width: 100%;
  flex-shrink: 0;
}

.config-group.flex-1 {
  flex: 1;
  min-height: 0;
}

.custom-select {
  position: relative;
  display: block;
  width: 100%;
  overflow: visible;
}

.custom-select.is-open {
  z-index: 60;
}

.config-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
}

.config-match-hint {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--color-text-tertiary);
  line-height: 1.4;
}

.voice-list-empty {
  margin: 0;
  padding: 16px 12px;
  font-size: 13px;
  color: var(--color-text-tertiary);
  text-align: center;
  line-height: 1.5;
}

/* ?? / ?? / ?? � ???????? */
.select-trigger,
.voice-item {
  width: 100%;
  min-height: var(--config-card-height);
  height: var(--config-card-height);
  box-sizing: border-box;
  border-radius: var(--radius-sm);
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  padding: 0 14px;
  box-shadow: var(--shadow-xs);
}

.select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 100%;
  margin: 0;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.select-trigger:hover {
  border-color: var(--color-gray-300);
  box-shadow: var(--shadow-sm);
  background: #fefefe;
}

.select-trigger[aria-expanded="true"] {
  border-color: var(--color-gray-400);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.04), var(--shadow-sm);
}

.select-arrow {
  width: 16px;
  height: 16px;
  color: var(--color-gray-400);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.select-trigger[aria-expanded="true"] .select-arrow {
  transform: rotate(180deg);
}

.select-options {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  max-height: 240px;
  overflow-y: auto;
  z-index: 100;
  list-style: none;
  padding: 6px;
  margin: 0;
  animation: dropdown-in 0.15s ease;
}

.select-option {
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition);
}

.select-option:hover,
.select-option.active {
  background: var(--color-gray-50);
}

.select-option.selected {
  background: var(--color-gray-100);
  font-weight: 500;
}

.voice-list {
  flex: 1;
  min-height: 0;
  width: 100%;
  max-height: 280px;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 6px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.voice-list::-webkit-scrollbar {
  display: none;
}

.voice-item {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  width: 100%;
  max-width: 100%;
  cursor: pointer;
  overflow: hidden;
  padding: 0 12px 0 10px;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.voice-item:hover {
  border-color: var(--color-gray-300);
  background: var(--color-gray-50);
}

.voice-item.selected {
  border-color: var(--color-black);
  box-shadow: var(--shadow-sm);
  background: var(--color-gray-100);
}

.voice-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.35);
}

.voice-avatar--sunset {
  background:
    radial-gradient(circle at 72% 28%, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 210deg, #ff8c42 0deg, #fff5eb 78deg, #ffb347 156deg, #ffffff 230deg, #ff8c42 310deg);
}

.voice-avatar--ocean {
  background:
    radial-gradient(circle at 68% 32%, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0) 40%),
    conic-gradient(from 190deg, #3b82f6 0deg, #e8f4ff 82deg, #06b6d4 160deg, #ffffff 240deg, #3b82f6 320deg);
}

.voice-avatar--lavender {
  background:
    radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 200deg, #8b5cf6 0deg, #f3e8ff 76deg, #ec4899 150deg, #ffffff 228deg, #8b5cf6 300deg);
}

.voice-avatar--mint {
  background:
    radial-gradient(circle at 72% 28%, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 205deg, #22c55e 0deg, #ecfdf5 80deg, #14b8a6 158deg, #ffffff 236deg, #22c55e 312deg);
}

.voice-avatar--coral {
  background:
    radial-gradient(circle at 68% 32%, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0) 40%),
    conic-gradient(from 195deg, #f97316 0deg, #fff7ed 78deg, #fb7185 152deg, #ffffff 230deg, #f97316 308deg);
}

.voice-avatar--rose {
  background:
    radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 200deg, #f472b6 0deg, #fce7f3 76deg, #ef4444 150deg, #ffffff 228deg, #f472b6 300deg);
}

.voice-avatar--steel {
  background:
    radial-gradient(circle at 72% 28%, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 210deg, #6366f1 0deg, #eef2ff 78deg, #4338ca 156deg, #ffffff 230deg, #6366f1 310deg);
}

.voice-avatar--peach {
  background:
    radial-gradient(circle at 68% 32%, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0) 40%),
    conic-gradient(from 190deg, #fdba74 0deg, #fff7ed 82deg, #fb923c 160deg, #ffffff 240deg, #fdba74 320deg);
}

.voice-avatar--jade {
  background:
    radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 200deg, #059669 0deg, #ecfdf5 76deg, #34d399 150deg, #ffffff 228deg, #059669 300deg);
}

.voice-avatar--amber {
  background:
    radial-gradient(circle at 72% 28%, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 205deg, #f59e0b 0deg, #fffbeb 80deg, #eab308 158deg, #ffffff 236deg, #f59e0b 312deg);
}

.voice-avatar--sky {
  background:
    radial-gradient(circle at 68% 32%, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0) 40%),
    conic-gradient(from 195deg, #0ea5e9 0deg, #e0f2fe 78deg, #2563eb 152deg, #ffffff 230deg, #0ea5e9 308deg);
}

.voice-avatar--teal {
  background:
    radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 200deg, #14b8a6 0deg, #ccfbf1 76deg, #0f766e 150deg, #ffffff 228deg, #14b8a6 300deg);
}

.voice-avatar--azure {
  background:
    radial-gradient(circle at 72% 28%, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 210deg, #38bdf8 0deg, #eff6ff 78deg, #3b82f6 156deg, #ffffff 230deg, #38bdf8 310deg);
}

.voice-avatar--blush {
  background:
    radial-gradient(circle at 68% 32%, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0) 40%),
    conic-gradient(from 190deg, #fda4af 0deg, #fff1f2 82deg, #fb7185 160deg, #ffffff 240deg, #fda4af 320deg);
}

.voice-avatar--graphite {
  background:
    radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 200deg, #52525b 0deg, #f4f4f5 76deg, #27272a 150deg, #ffffff 228deg, #52525b 300deg);
}

.voice-avatar--lime {
  background:
    radial-gradient(circle at 72% 28%, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 205deg, #84cc16 0deg, #f7fee7 80deg, #65a30d 158deg, #ffffff 236deg, #84cc16 312deg);
}

.voice-avatar--violet {
  background:
    radial-gradient(circle at 68% 32%, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0) 40%),
    conic-gradient(from 195deg, #7c3aed 0deg, #f5f3ff 78deg, #c084fc 152deg, #ffffff 230deg, #7c3aed 308deg);
}

.voice-avatar--slate {
  background:
    radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0) 42%),
    conic-gradient(from 200deg, #64748b 0deg, #f1f5f9 76deg, #334155 150deg, #ffffff 228deg, #64748b 300deg);
}

.voice-title {
  flex: 1;
  min-width: 0;
  margin: 0;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.voice-play-btn {
  width: 38px;
  height: 38px;
  border: none;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
  margin-right: -4px;
  transition: opacity var(--transition), transform var(--transition);
}

.voice-play-btn:hover {
  opacity: 0.6;
}

.voice-play-btn:active {
  transform: scale(0.92);
}

.voice-play-btn svg {
  width: 20px;
  height: 22px;
  fill: var(--color-black);
  margin-left: 2px;
}

.voice-play-btn.playing svg {
  display: none;
}

.voice-play-btn.playing::after {
  content: '';
  width: 12px;
  height: 12px;
  background: var(--color-black);
  border-radius: 1px;
}

/* ---- ???? ---- */
.generate-area {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}

.btn-generate {
  min-width: 200px;
  padding: 14px 48px;
  background: var(--color-black);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.12);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-generate:hover:not(:disabled) {
  background: #2a2a2a;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1), 0 8px 20px rgba(0, 0, 0, 0.15);
}

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

.btn-generate:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.generate-loading {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---- ????? ---- */
.player-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-top: 1px solid var(--color-border-subtle);
  padding: 14px 24px;
  z-index: 45;
  box-shadow: var(--shadow-player);
  animation: slide-up 0.3s ease;
}

@keyframes slide-up {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.player-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.player-play-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-black);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.player-play-btn:hover {
  transform: scale(1.05);
}

.player-icon {
  width: 20px;
  height: 20px;
  color: white;
}

.player-info {
  flex: 1;
  min-width: 0;
}

.player-title {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 8px;
}

.player-time {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.player-progress-wrap {
  width: 100%;
}

.player-progress {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: transparent;
  border-radius: 100px;
  outline: none;
  cursor: pointer;
  --played: 0%;
}

.player-progress::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 100px;
  background: linear-gradient(
    to right,
    var(--color-black) 0%,
    var(--color-black) var(--played),
    var(--color-gray-200) var(--played),
    var(--color-gray-200) 100%
  );
}

.player-progress::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  margin-top: -5px;
  border-radius: 50%;
  background: var(--color-black);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
  cursor: pointer;
  transition: transform var(--transition);
}

.player-progress::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.player-progress::-moz-range-track {
  height: 4px;
  border-radius: 100px;
  background: var(--color-gray-200);
}

.player-progress::-moz-range-progress {
  height: 4px;
  border-radius: 100px;
  background: var(--color-black);
}

.player-progress::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-black);
  border: none;
  cursor: pointer;
}

.player-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.player-action-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--color-gray-500);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}

.player-action-btn:hover:not(:disabled) {
  color: var(--color-black);
  background: var(--color-gray-100);
}

.player-action-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.player-action-btn svg {
  width: 18px;
  height: 18px;
}

/* ---- ???? ---- */
.back-to-top {
  position: fixed;
  bottom: 88px;
  right: 32px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-black);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 35;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), opacity var(--transition);
}

.back-to-top:hover {
  transform: translateY(-2px);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
}

.back-to-top.player-visible {
  bottom: 88px;
}

.app-site-footer {
  padding: 24px 24px 32px;
  text-align: center;
  font-size: 13px;
  border-top: 1px solid var(--color-border-subtle);
}

.app-site-footer-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 8px;
  margin-bottom: 12px;
}

.app-site-footer-nav span {
  color: var(--color-text-tertiary);
  font-size: 12px;
}

.app-site-footer-line {
  margin: 0;
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.app-site-footer-label {
  color: var(--color-text-tertiary);
}

.app-site-footer a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
}

.app-site-footer a:hover {
  color: var(--color-text-secondary);
}

/* ---- ?? ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: transparent;
}

/* ??????????? */
.modal-backdrop-blur {
  position: absolute;
  inset: 0;
  background-color: var(--color-bg);
  background-image: url('../images/auth-modal-bg.svg');
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 0.28s ease;
  pointer-events: none;
  will-change: opacity;
}

.modal-overlay:not(.hidden) .modal-backdrop-blur.has-snapshot {
  opacity: 1;
}

.modal-backdrop-dim {
  position: absolute;
  inset: 0;
  background: rgba(247, 247, 248, 0.22);
  pointer-events: none;
}

.modal-content {
  position: relative;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-xl);
  padding: 40px;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.18), 0 0 0 1px rgba(0, 0, 0, 0.04);
  animation: modal-in 0.2s ease;
  text-align: center;
  contain: layout paint;
}

@media (prefers-reduced-motion: reduce) {
  .modal-content {
    animation: none;
  }
}

.auth-modal {
  text-align: left;
  max-width: 400px;
  padding: 32px 36px 36px;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: var(--color-gray-100);
  color: var(--color-text-secondary);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.modal-close:hover {
  background: var(--color-gray-200);
  color: var(--color-text-primary);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 4px;
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.auth-field label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: -0.01em;
}

.auth-field input {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text-primary);
  background: var(--color-white);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.auth-field input:focus {
  outline: none;
  border-color: var(--color-gray-400);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.06);
}

.auth-field input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.auth-form-error {
  font-size: 13px;
  color: #c0392b;
  line-height: 1.5;
  margin: -4px 0 0;
}

.btn-auth-submit {
  width: 100%;
  margin-top: 4px;
  padding: 13px 24px;
  background: var(--color-black);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), opacity var(--transition);
}

.btn-auth-submit:hover:not(:disabled) {
  background: #2a2a2a;
  transform: translateY(-1px);
}

.btn-auth-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.auth-modal .modal-title {
  text-align: center;
  padding-right: 28px;
}

.auth-modal .modal-subtitle {
  text-align: center;
  margin-bottom: 20px;
}

.auth-modal .modal-footer-text {
  text-align: center;
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.95) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-title {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.modal-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  line-height: 1.65;
  letter-spacing: -0.01em;
}

.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 14px 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn-google:hover {
  border-color: var(--color-gray-300);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.google-icon {
  width: 20px;
  height: 20px;
}

.modal-footer-text {
  margin-top: 20px;
  font-size: 13px;
  color: var(--color-gray-500);
}

.link-btn {
  background: none;
  border: none;
  color: var(--color-black);
  font-weight: 500;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.link-btn:hover {
  opacity: 0.7;
}

/* ---- Toast ---- */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-black);
  color: var(--color-white);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.01em;
  z-index: 200;
  box-shadow: var(--shadow-md);
  animation: toast-in 0.3s ease;
  white-space: nowrap;
}

.toast.player-visible {
  bottom: 80px;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(-50%) translateY(12px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

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

/* ---- ??? ---- */
@media (max-width: 900px) {
  .workspace-card {
    grid-template-columns: 1fr;
  }

  .config-panel {
    border-left: none;
    border-top: 1px solid var(--color-gray-200);
  }

  .site-tagline {
    font-size: 16px;
  }

  .player-inner {
    flex-wrap: wrap;
    gap: 10px;
  }

  .player-info {
    order: 3;
    width: 100%;
  }
}

@media (max-width: 640px) {
  .header-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .main-content {
    padding-left: 16px;
    padding-right: 16px;
  }

  .modal-content {
    padding: 28px 24px;
  }
}