.flashcards-studio { height: 100%; min-height: 0; color: var(--text-primary); background: var(--bg-primary); }
.flashcards-studio-shell { display: grid; grid-template-columns: minmax(220px, 286px) minmax(0, 1fr); height: 100%; min-height: 0; 
  background: var(--bg-secondary);
}
.flashcards-deck-panel { display: flex; min-height: 0; flex-direction: column; padding: 22px 16px 16px; border-right: 0px solid var(--border); background: color-mix(in srgb, var(--bg-secondary) 84%, transparent); }
.flashcards-deck-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 0 4px 16px; }
.flashcards-deck-heading div { display: grid; gap: 3px; }
.flashcards-deck-heading span, .flashcards-title-field > span, .flashcards-card-number, .flashcards-preview-heading span { color: var(--text-secondary); font-size: .55rem; font-weight: 750; letter-spacing: .09em; text-transform: uppercase; }
.flashcards-deck-heading strong { font-size: .9rem; letter-spacing: -.02em; }
.flashcards-deck-list { display: grid; align-content: start; gap: 7px; min-height: 0; padding: 2px; overflow-y: auto; }
.flashcards-deck-item { display: grid; grid-template-columns: 28px minmax(0, 1fr); align-items: center; gap: 9px; width: 100%; min-height: 48px; padding: 7px 10px; border: 1px solid transparent; border-radius: 15px; color: var(--text-primary); background: transparent; text-align: left; cursor: pointer; }
.flashcards-deck-item:hover { background: var(--bg-hover); }
.flashcards-deck-item.is-selected { border-color: color-mix(in srgb, var(--color-accent) 38%, var(--border)); background: color-mix(in srgb, var(--color-accent) 9%, var(--bg-secondary)); box-shadow: 0 1px 2px color-mix(in srgb, var(--text-primary) 8%, transparent); }
.flashcards-deck-item > span { display: grid; width: 26px; height: 26px; place-items: center; border-radius: 8px; color: var(--text-secondary); background: var(--bg-tertiary); font-size: .6rem; font-weight: 720; }
.flashcards-deck-item strong { overflow: hidden; font-size: .65rem; font-weight: 650; text-overflow: ellipsis; white-space: nowrap; }
.flashcards-add-card { display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 42px; margin-top: 12px; border: 1px dashed color-mix(in srgb, var(--text-secondary) 42%, var(--border)); border-radius: 12px; color: var(--text-secondary); background: transparent; font: inherit; font-size: .65rem; font-weight: 650; cursor: pointer; }
.flashcards-add-card:hover { color: var(--text-primary); border-color: var(--color-accent); background: color-mix(in srgb, var(--color-accent) 6%, transparent); }
.flashcards-editor-panel { display: flex; min-width: 0; min-height: 0; flex-direction: column; overflow: hidden; margin: 20px;
  border: 1px solid var(--border); border-radius: 17px;
}
.flashcards-editor-heading { display: flex; align-items: end; justify-content: space-between; gap: 18px; padding: 21px 28px 18px; border-bottom: 1px solid var(--border); background: color-mix(in srgb, var(--bg-primary) 92%, transparent); }
.flashcards-title-field { display: grid; flex: 1; gap: 5px; min-width: 160px; }
.flashcards-title-field input { width: min(540px, 100%); padding: 0; border: 0; outline: 0; color: var(--text-primary); background: transparent; font: inherit; font-size: clamp(1rem, 2.2vw, 1.45rem); font-weight: 720; letter-spacing: -.035em; }
.flashcards-title-field input::placeholder { color: var(--text-tertiary); }
.flashcards-card-tools { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px; }
.flashcards-card-tools button { min-height: 34px; padding: 0 11px; border: 1px solid var(--border); border-radius: 9px; color: var(--text-secondary); background: var(--bg-secondary); font: inherit; font-size: .6rem; font-weight: 620; cursor: pointer; }
.flashcards-card-tools button:hover:not(:disabled) { color: var(--text-primary); background: var(--bg-hover); }
.flashcards-card-tools button:disabled { opacity: .36; cursor: default; }
.flashcards-card-tools button.is-danger:hover { color: var(--color-danger, #b3261e); border-color: color-mix(in srgb, var(--color-danger, #b3261e) 35%, var(--border)); }
.flashcards-editor-grid { display: grid; grid-template-columns: minmax(300px, .92fr) minmax(360px, 1.08fr); gap: clamp(24px, 4vw, 54px); min-height: 0; flex: 1; padding: clamp(24px, 4vw, 52px); overflow-y: auto; }
.flashcards-copy-editor { display: grid; align-content: start; gap: 18px; }
.flashcards-copy-editor label { display: grid; gap: 8px; }
.flashcards-copy-editor label > span { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; font-size: .7rem; font-weight: 700; }
.flashcards-copy-editor label small { color: var(--text-tertiary); font-size: .55rem; font-weight: 520; }
.flashcards-copy-editor textarea { width: 100%; min-height: 144px; resize: vertical; padding: 18px; border: 1px solid var(--border); border-radius: 15px; outline: none; color: var(--text-primary); background: var(--bg-secondary); box-shadow: 0 1px 2px color-mix(in srgb, var(--text-primary) 5%, transparent); font: inherit; font-size: .8rem; line-height: 1.55; }
.flashcards-copy-editor textarea:focus { border-color: color-mix(in srgb, var(--color-accent) 62%, var(--border)); box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 13%, transparent); }
.flashcards-live-preview { display: grid; align-content: start; justify-items: stretch; gap: 14px; min-width: 0; }
.flashcards-preview-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.flashcards-preview-heading small { color: var(--text-tertiary); font-size: .6rem; }
.flashcards-preview-card { width: 100%; min-height: 360px; padding: 0; border: 0; outline: none; border-radius: 24px; color: var(--text-primary); background: transparent; perspective: 1200px; cursor: pointer; }
.flashcards-preview-card:focus-visible { box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-accent) 20%, transparent); }
.flashcards-preview-inner { position: relative; display: block; width: 100%; height: 100%; min-height: 360px; transform-style: preserve-3d; transition: transform 420ms cubic-bezier(.2,.75,.25,1); }
.flashcards-preview-card.is-flipped .flashcards-preview-inner { transform: rotateY(180deg); }
.flashcards-preview-face { position: absolute; inset: 0; display: grid; grid-template-rows: auto 1fr auto; align-items: center; padding: clamp(26px, 4vw, 48px); overflow: hidden; backface-visibility: hidden; border: 1px solid color-mix(in srgb, var(--color-accent) 30%, var(--border)); border-radius: 24px; background: linear-gradient(145deg, color-mix(in srgb, var(--color-accent) 7%, var(--bg-secondary)), var(--bg-secondary) 54%); box-shadow: 0 18px 50px color-mix(in srgb, var(--text-primary) 12%, transparent), 0 2px 7px color-mix(in srgb, var(--text-primary) 7%, transparent); text-align: center; }
.flashcards-preview-face::after { position: absolute; width: 190px; height: 190px; right: -95px; bottom: -105px; border-radius: 50%; background: color-mix(in srgb, var(--color-accent) 14%, transparent); content: ''; }
.flashcards-preview-face.is-back { transform: rotateY(180deg); background: linear-gradient(145deg, color-mix(in srgb, #8e67c7 9%, var(--bg-secondary)), var(--bg-secondary) 58%); }
.flashcards-preview-face small { align-self: start; justify-self: center; padding: 6px 10px; border-radius: 999px; color: color-mix(in srgb, var(--color-accent) 80%, var(--text-primary)); background: color-mix(in srgb, var(--color-accent) 10%, transparent); font-size: .55rem; font-weight: 780; letter-spacing: .1em; text-transform: uppercase; }
.flashcards-preview-face strong { z-index: 1; max-height: 230px; overflow-y: auto; white-space: pre-wrap; font-size: clamp(1.2rem, 3.1vw, 2rem); line-height: 1.24; letter-spacing: -.03em; }
.flashcards-preview-face em { align-self: end; color: var(--text-tertiary); font-size: .6rem; font-style: normal; }
.flashcards-shuffle { display: flex; align-items: center; justify-content: center; gap: 9px; color: var(--text-secondary); font-size: .65rem; cursor: pointer; }
.flashcards-shuffle input { accent-color: var(--color-accent); }
@media (max-width: 860px) {
  .flashcards-studio-shell { grid-template-columns: 172px minmax(0, 1fr); }
  .flashcards-editor-heading { align-items: stretch; flex-direction: column; }
  .flashcards-card-tools { justify-content: flex-start; }
  .flashcards-editor-grid { grid-template-columns: 1fr; }
  .flashcards-preview-card, .flashcards-preview-inner { min-height: 310px; }
}
@media (max-width: 600px) {
  .flashcards-studio-shell { display: block; overflow-y: auto; }
  .flashcards-deck-panel { min-height: auto; border-right: 0; border-bottom: 1px solid var(--border); }
  .flashcards-deck-list { display: flex; overflow-x: auto; }
  .flashcards-deck-item { min-width: 150px; }
  .flashcards-add-card { display: none; }
  .flashcards-editor-panel { overflow: visible; }
  .flashcards-editor-heading, .flashcards-editor-grid { padding: 20px; }
  .flashcards-copy-editor textarea { min-height: 124px; }
}
.flashcards-editor-heading { align-items: center; flex-direction: row; padding: 12px 20px; }
.flashcards-title-field { min-width: 0; gap: 0; }
.flashcards-title-field input { line-height: 1.2; }
.flashcards-card-tools { flex-wrap: nowrap; }
.flashcards-card-tools button { display: grid; width: 34px; min-width: 34px; height: 34px; min-height: 34px; padding: 0; place-items: center; }
.flashcards-card-tools button:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.flashcards-card-tools svg { width: 17px; height: 17px; pointer-events: none; }
@media (prefers-reduced-motion: reduce) { .flashcards-preview-inner { transition: none; } }