/* ── Language Tutor — additional styles ── */

/* ── Tab navigation ── */
.tutor-tabs {
    display: flex; gap: 0; background: #16213e;
    border-bottom: 1px solid #0f3460; padding: 0 1rem;
}
.tutor-tab {
    background: none; border: none; border-bottom: 2px solid transparent;
    color: #64748b; padding: 0.6rem 1rem; font-size: 0.82rem;
    cursor: pointer; transition: all 0.15s; font-family: inherit;
}
.tutor-tab:hover { color: #e0e0e0; }
.tutor-tab.active { color: #e94560; border-bottom-color: #e94560; }

/* ── Tab panels ── */
.tutor-panel { display: none; flex: 1; overflow: hidden; flex-direction: column; }
.tutor-panel.active { display: flex; }

/* ── Chat panel ── */
#tutor-chat {
    flex: 1; overflow-y: auto; padding: 1rem 1.5rem;
    display: flex; flex-direction: column; gap: 0.75rem;
}

#tutor-input-area {
    padding: 0.75rem 1.5rem; background: #16213e;
    border-top: 1px solid #0f3460; display: flex; gap: 0.75rem;
}
#tutor-input-area textarea {
    flex: 1; background: #1a1a2e; border: 1px solid #0f3460; color: #e0e0e0;
    padding: 0.6rem 0.85rem; border-radius: 0.6rem; font-family: inherit;
    font-size: 0.9rem; resize: none; outline: none;
    min-height: 2.5rem; max-height: 8rem;
}
#tutor-input-area textarea:focus { border-color: #e94560; }
#tutor-input-area button {
    background: #e94560; color: white; border: none; padding: 0 1rem;
    border-radius: 0.6rem; font-size: 0.9rem; cursor: pointer;
}
#tutor-input-area button:hover { background: #c73652; }
#tutor-input-area button:disabled { background: #4a4a5a; cursor: not-allowed; }

/* ── Session config bar ── */
.tutor-config {
    display: flex; gap: 0.5rem; padding: 0.5rem 1rem;
    background: #0d1b2e; align-items: center; flex-wrap: wrap;
}
.tutor-config select, .tutor-config input {
    background: #1a1a2e; border: 1px solid #0f3460; color: #e0e0e0;
    padding: 0.3rem 0.5rem; border-radius: 0.4rem; font-size: 0.78rem;
    font-family: inherit; outline: none;
}
.tutor-config select:focus, .tutor-config input:focus { border-color: #e94560; }
.tutor-config label {
    font-size: 0.72rem; color: #64748b; display: flex;
    align-items: center; gap: 0.3rem;
}
.tutor-config button {
    background: #0f3460; color: #94a3b8; border: 1px solid #1a3a6e;
    padding: 0.3rem 0.6rem; border-radius: 0.4rem; font-size: 0.72rem;
    cursor: pointer;
}
.tutor-config button:hover { background: #1a3a6e; color: #e0e0e0; }
.tutor-config .active-session {
    font-size: 0.72rem; color: #60a5fa; margin-left: auto;
}

/* ── Lessons panel ── */
.lessons-content { flex: 1; overflow-y: auto; padding: 1rem 1.5rem; min-height: 0; }
.lesson-form {
    display: flex; gap: 0.5rem; padding: 0.75rem 1.5rem;
    background: #0d1b2e; border-bottom: 1px solid #0f3460; flex-wrap: wrap;
    align-items: center;
}
.lesson-form input, .lesson-form select {
    background: #1a1a2e; border: 1px solid #0f3460; color: #e0e0e0;
    padding: 0.35rem 0.6rem; border-radius: 0.4rem; font-size: 0.8rem;
    font-family: inherit; outline: none;
}
.lesson-form input { flex: 1; min-width: 150px; }
.lesson-form input:focus, .lesson-form select:focus { border-color: #e94560; }
.lesson-form button {
    background: #e94560; color: white; border: none;
    padding: 0.35rem 0.8rem; border-radius: 0.4rem; font-size: 0.8rem;
    cursor: pointer;
}
.lesson-form button:hover { background: #c73652; }

.lesson-card {
    background: #16213e; border: 1px solid #0f3460; border-radius: 0.5rem;
    padding: 0.75rem 1rem; margin-bottom: 0.5rem; cursor: pointer;
    transition: border-color 0.15s;
}
.lesson-card:hover { border-color: #e94560; }
.lesson-card-title { font-size: 0.88rem; color: #e0e0e0; font-weight: 500; }
.lesson-card-meta { font-size: 0.7rem; color: #64748b; margin-top: 0.2rem; }

.lesson-viewer {
    background: #16213e; border: 1px solid #0f3460; border-radius: 0.5rem;
    padding: 1rem 1.25rem; line-height: 1.6; font-size: 0.9rem;
}
.lesson-viewer h1, .lesson-viewer h2, .lesson-viewer h3 { color: #e94560; margin: 0.8em 0 0.4em; }
.lesson-viewer p { margin: 0.5em 0; }
.lesson-viewer code { background: #0d1b2e; padding: 0.15em 0.35em; border-radius: 0.25em; font-size: 0.88em; }
.lesson-viewer pre { background: #0d1b2e; padding: 0.75rem; border-radius: 0.5rem; overflow-x: auto; margin: 0.5em 0; }
.lesson-viewer table { border-collapse: collapse; width: 100%; margin: 0.75em 0; }
.lesson-viewer th, .lesson-viewer td { border: 1px solid #0f3460; padding: 0.4rem 0.6rem; text-align: left; font-size: 0.82rem; }
.lesson-viewer th { background: #0d1b2e; color: #60a5fa; }

/* ── Vocabulary panel ── */
.vocab-content { flex: 1; overflow-y: auto; padding: 1rem 1.5rem; min-height: 0; }
.vocab-toolbar {
    display: flex; gap: 0.5rem; padding: 0.75rem 1.5rem;
    background: #0d1b2e; border-bottom: 1px solid #0f3460; align-items: center;
}
.vocab-toolbar input {
    flex: 1; background: #1a1a2e; border: 1px solid #0f3460; color: #e0e0e0;
    padding: 0.35rem 0.6rem; border-radius: 0.4rem; font-size: 0.8rem;
    font-family: inherit; outline: none;
}
.vocab-toolbar input:focus { border-color: #e94560; }
.vocab-toolbar .vocab-count { font-size: 0.72rem; color: #64748b; }

.vocab-table { width: 100%; border-collapse: collapse; }
.vocab-table th, .vocab-table td {
    border: 1px solid #0f3460; padding: 0.4rem 0.6rem;
    text-align: left; font-size: 0.82rem;
}
.vocab-table th { background: #0d1b2e; color: #60a5fa; position: sticky; top: 0; }
.vocab-table tr:hover { background: #1e2240; }
.vocab-table .mastery {
    display: inline-block; width: 2rem; text-align: center;
    padding: 0.15rem 0.3rem; border-radius: 0.25rem;
    font-size: 0.72rem; font-weight: 600;
}
.mastery-0 { background: #3b1020; color: #fca5a5; }
.mastery-1 { background: #4a2020; color: #f9a8d4; }
.mastery-2 { background: #3a3010; color: #fde68a; }
.mastery-3 { background: #1a3a1a; color: #86efac; }
.mastery-4 { background: #0a3a2a; color: #6ee7b7; }
.mastery-5 { background: #064e3b; color: #34d399; }

/* ── Quiz panel ── */
.quiz-content { flex: 1; overflow-y: auto; padding: 1rem 1.5rem; min-height: 0; }
.quiz-form {
    display: flex; gap: 0.5rem; padding: 0.75rem 1.5rem;
    background: #0d1b2e; border-bottom: 1px solid #0f3460; flex-wrap: wrap;
    align-items: center;
}
.quiz-form select, .quiz-form input {
    background: #1a1a2e; border: 1px solid #0f3460; color: #e0e0e0;
    padding: 0.35rem 0.6rem; border-radius: 0.4rem; font-size: 0.8rem;
    font-family: inherit; outline: none;
}
.quiz-form select:focus, .quiz-form input:focus { border-color: #e94560; }
.quiz-form button {
    background: #e94560; color: white; border: none;
    padding: 0.35rem 0.8rem; border-radius: 0.4rem; font-size: 0.8rem;
    cursor: pointer;
}
.quiz-form button:hover { background: #c73652; }

.quiz-question {
    background: #16213e; border: 1px solid #0f3460; border-radius: 0.5rem;
    padding: 0.85rem 1rem; margin-bottom: 0.75rem;
}
.quiz-question-text { font-size: 0.9rem; color: #e0e0e0; margin-bottom: 0.5rem; }
.quiz-question-num { font-size: 0.72rem; color: #e94560; font-weight: 600; margin-bottom: 0.3rem; }
.quiz-option {
    display: block; padding: 0.4rem 0.6rem; margin: 0.25rem 0;
    background: #1a1a2e; border: 1px solid #0f3460; border-radius: 0.35rem;
    color: #e0e0e0; font-size: 0.82rem; cursor: pointer;
    transition: all 0.15s;
}
.quiz-option:hover { border-color: #e94560; }
.quiz-option.selected { border-color: #e94560; background: #2a1a3e; }
.quiz-option.correct { border-color: #34d399; background: #064e3b; }
.quiz-option.incorrect { border-color: #ef4444; background: #3b1020; }
.quiz-option input[type="radio"] { display: none; }
.quiz-option input[type="text"] {
    background: #0d1b2e; border: 1px solid #0f3460; color: #e0e0e0;
    padding: 0.3rem 0.5rem; border-radius: 0.3rem; width: 100%;
    font-size: 0.82rem; outline: none; margin-top: 0.3rem;
}
.quiz-submit-bar {
    display: flex; gap: 0.5rem; padding: 0.75rem 1.5rem;
    background: #0d1b2e; border-top: 1px solid #0f3460;
}
.quiz-submit-bar button {
    background: #e94560; color: white; border: none;
    padding: 0.45rem 1rem; border-radius: 0.4rem; font-size: 0.85rem;
    cursor: pointer;
}
.quiz-submit-bar button:hover { background: #c73652; }
.quiz-results {
    background: #16213e; border: 1px solid #0f3460; border-radius: 0.5rem;
    padding: 1rem; margin-top: 0.75rem;
}
.quiz-score { font-size: 1.2rem; color: #e94560; font-weight: 700; text-align: center; margin-bottom: 0.5rem; }
.quiz-feedback {
    font-size: 0.78rem; color: #94a3b8; font-style: italic; margin-top: 0.4rem;
    padding: 0.3rem 0.5rem; border-left: 2px solid #0f3460; background: #0d1b2e;
    border-radius: 0 0.3rem 0.3rem 0;
}
.quiz-score-badge {
    display: inline-block; font-size: 0.7rem; font-weight: 700;
    padding: 0.1rem 0.4rem; border-radius: 0.2rem; margin-left: 0.4rem; vertical-align: middle;
}
.quiz-score-badge.full  { background: #064e3b; color: #34d399; }
.quiz-score-badge.half  { background: #451a03; color: #fb923c; }
.quiz-score-badge.wrong { background: #3b1020; color: #ef4444; }

/* ── Matching question ── */
.quiz-matching-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem; margin-top: 0.4rem;
}
.quiz-matching-row {
    display: contents;
}
.quiz-matching-left {
    background: #0d1b2e; border: 1px solid #0f3460; border-radius: 0.35rem;
    padding: 0.35rem 0.6rem; font-size: 0.85rem; color: #38bdf8;
    display: flex; align-items: center;
}
.quiz-matching-select {
    background: #1a1a2e; border: 1px solid #0f3460; color: #e0e0e0;
    padding: 0.35rem 0.5rem; border-radius: 0.35rem; font-size: 0.82rem;
    font-family: inherit; outline: none; width: 100%;
}
.quiz-matching-select:focus { border-color: #e94560; }
.quiz-matching-select.correct { border-color: #34d399; background: #064e3b; }
.quiz-matching-select.incorrect { border-color: #ef4444; background: #3b1020; }

/* ── Reorder question ── */
.quiz-reorder-answer {
    min-height: 2.5rem; background: #0d1b2e; border: 1px dashed #0f3460;
    border-radius: 0.4rem; padding: 0.4rem 0.5rem; margin-bottom: 0.5rem;
    display: flex; flex-wrap: wrap; gap: 0.3rem; align-items: center;
}
.quiz-reorder-pool {
    display: flex; flex-wrap: wrap; gap: 0.3rem; margin-top: 0.25rem;
}
.quiz-reorder-answer-label {
    font-size: 0.7rem; color: #64748b; margin-bottom: 0.25rem;
}
.quiz-word-chip {
    background: #1a1a2e; border: 1px solid #0f3460; color: #e0e0e0;
    padding: 0.25rem 0.6rem; border-radius: 1rem; font-size: 0.82rem;
    cursor: pointer; transition: all 0.12s; user-select: none;
}
.quiz-word-chip:hover { border-color: #e94560; background: #2a1a3e; }
.quiz-word-chip.in-answer { background: #16213e; border-color: #38bdf8; color: #38bdf8; }
.quiz-word-chip.correct { border-color: #34d399; background: #064e3b; color: #34d399; cursor: default; }
.quiz-word-chip.incorrect { border-color: #ef4444; background: #3b1020; color: #ef4444; cursor: default; }

/* ── Listening question ── */
.quiz-listen-btn {
    background: #0f3460; border: 1px solid #38bdf8; color: #38bdf8;
    padding: 0.35rem 0.85rem; border-radius: 0.4rem; font-size: 0.82rem;
    cursor: pointer; margin-bottom: 0.5rem; transition: all 0.15s;
}
.quiz-listen-btn:hover { background: #1a3a6e; }

/* ── Cloze question ── */
.quiz-cloze-text {
    font-size: 0.9rem; color: #e0e0e0; line-height: 2;
}
.quiz-cloze-input {
    background: #0d1b2e; border: 1px solid #38bdf8; color: #e0e0e0;
    padding: 0.2rem 0.5rem; border-radius: 0.3rem; font-size: 0.88rem;
    font-family: inherit; outline: none; width: 8rem; text-align: center;
    border-bottom: 2px solid #38bdf8; vertical-align: baseline;
}
.quiz-cloze-input:focus { border-color: #e94560; border-bottom-color: #e94560; }
.quiz-cloze-input.correct { border-color: #34d399; border-bottom-color: #34d399; color: #34d399; }
.quiz-cloze-input.incorrect { border-color: #ef4444; border-bottom-color: #ef4444; color: #ef4444; }

/* Keep student answers visible after submit */
.quiz-answer-input:disabled,
.quiz-cloze-input:disabled {
    -webkit-text-fill-color: #94a3b8;
    color: #94a3b8;
    opacity: 1;
}

/* ── Stats / Appraisal panel ── */
.stats-content { flex: 1; overflow-y: auto; padding: 1rem 1.5rem; min-height: 0; }
.stats-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem; margin-bottom: 1rem;
}
.stat-card {
    background: #16213e; border: 1px solid #0f3460; border-radius: 0.5rem;
    padding: 0.75rem; text-align: center;
}
.stat-value { font-size: 1.4rem; font-weight: 700; color: #e94560; }
.stat-label { font-size: 0.72rem; color: #64748b; margin-top: 0.2rem; }
.appraisal-viewer {
    background: #16213e; border: 1px solid #0f3460; border-radius: 0.5rem;
    padding: 1rem 1.25rem; line-height: 1.6; font-size: 0.9rem;
    margin-top: 0.75rem;
}

/* ── Tutor sessions panel ── */
.tutor-sessions-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.4); z-index: 49; display: none;
}
.tutor-sessions-overlay.open { display: block; }
.tutor-sessions-panel {
    position: fixed; top: 0; right: -340px; width: 340px; height: 100%;
    background: #16213e; border-left: 1px solid #0f3460; z-index: 50;
    display: flex; flex-direction: column; transition: right 0.25s ease;
}
.tutor-sessions-panel.open { right: 0; }

/* ── SSE streaming ── */
.tutor-streaming {
    background: #0d1b2e; border: 1px solid #1a2a4e; border-radius: 0.5rem;
    padding: 0.65rem 0.85rem; font-size: 0.8rem; line-height: 1.5;
    color: #94a3b8; max-height: 300px; overflow-y: auto;
    white-space: pre-wrap; word-wrap: break-word;
}
.tutor-streaming-label {
    font-size: 0.75rem; color: #e94560; font-weight: 600;
    margin-bottom: 0.3rem; display: flex; align-items: center; gap: 0.4rem;
}
.tutor-streaming-label .pulse {
    width: 8px; height: 8px; border-radius: 50%; background: #e94560;
    animation: pulse 1s infinite;
}

/* ── Past quiz list ── */
.quiz-card {
    background: #16213e; border: 1px solid #0f3460; border-radius: 0.5rem;
    padding: 0.65rem 0.85rem; margin-bottom: 0.5rem; cursor: pointer;
    transition: border-color 0.15s;
}
.quiz-card:hover { border-color: #e94560; }
.quiz-card-meta { font-size: 0.7rem; color: #64748b; margin-top: 0.15rem; }

/* ── Translate panel ── */
.translate-container { display: flex; flex-direction: column; gap: 1rem; flex: 1; min-height: 0; overflow-y: auto; padding: 1rem 1.5rem; }
.translate-pane { background: #16213e; border: 1px solid #0f3460; border-radius: 0.75rem; padding: 1rem; }
.translate-header {
    display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.75rem;
}
.translate-header select {
    flex: 1; background: #1a1a2e; color: #e2e8f0; border: 1px solid #0f3460;
    border-radius: 0.4rem; padding: 0.35rem 0.5rem; font-size: 0.85rem;
}
.swap-btn {
    background: none; border: 1px solid #0f3460; color: #e94560;
    border-radius: 50%; width: 2rem; height: 2rem; font-size: 1.1rem;
    cursor: pointer; transition: background 0.15s, transform 0.15s;
    display: flex; align-items: center; justify-content: center;
}
.swap-btn:hover { background: #0f3460; transform: rotate(180deg); }
.translate-boxes {
    display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem;
}
@media (max-width: 680px) {
    .translate-boxes { grid-template-columns: 1fr; }
}
.translate-box-wrap {
    display: flex; flex-direction: column; min-height: 0;
}
.translate-box-label {
    font-size: 0.72rem; color: #64748b; text-transform: uppercase;
    letter-spacing: 0.05em; margin-bottom: 0.25rem;
}
.translate-box-wrap textarea {
    background: #1a1a2e; color: #e2e8f0; border: 1px solid #0f3460;
    border-radius: 0.5rem; padding: 0.65rem; font-size: 0.88rem;
    resize: vertical; min-height: 7rem; font-family: inherit;
}
.translate-box-wrap textarea:focus { outline: none; border-color: #e94560; }
.translate-output-text {
    background: #1a1a2e; color: #e2e8f0; border: 1px solid #0f3460;
    border-radius: 0.5rem; padding: 0.65rem; font-size: 0.88rem;
    min-height: 7rem; white-space: pre-wrap; word-break: break-word;
}
.translate-box-actions {
    display: flex; gap: 0.35rem; margin-top: 0.35rem;
}
.translate-box-actions button {
    background: #0f3460; color: #e2e8f0; border: none; border-radius: 0.35rem;
    padding: 0.25rem 0.55rem; font-size: 0.75rem; cursor: pointer;
    transition: background 0.15s;
}
.translate-box-actions button:hover { background: #e94560; }
.translate-box-actions button.recording {
    background: #e94560; animation: pulse-mic 1s infinite;
}
@keyframes pulse-mic {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
.translate-actions {
    margin-top: 0.75rem; text-align: center;
}
#translate-btn {
    background: #e94560; color: white; border: none; border-radius: 0.5rem;
    padding: 0.5rem 2rem; font-size: 0.9rem; cursor: pointer;
    transition: background 0.15s;
}
#translate-btn:hover { background: #d63851; }
#translate-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* translate history */
.translate-history { max-height: 18rem; overflow-y: auto; }
.translate-history-item {
    background: #16213e; border: 1px solid #0f3460; border-radius: 0.45rem;
    padding: 0.5rem 0.7rem; margin-bottom: 0.35rem; cursor: pointer;
    transition: border-color 0.15s; font-size: 0.8rem;
}
.translate-history-item:hover { border-color: #e94560; }
.th-langs { color: #64748b; font-size: 0.72rem; display: flex; justify-content: space-between; }
.th-time { color: #475569; }
.th-source { color: #94a3b8; margin-top: 0.15rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.th-target { color: #e94560; margin-top: 0.1rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }


/* ---- Printable sheets ------------------------------------------------- */

.sheets-overlay {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 60;
}

.sheets-panel {
    display: none;
    position: fixed;
    top: 3vh; left: 4vw; right: 4vw; bottom: 3vh;
    background: #16213e;
    border: 1px solid #1a3a6e;
    border-radius: 0.75rem;
    z-index: 61;
    overflow: hidden;
}

.sheets-panel.open { display: grid; grid-template-columns: 330px 1fr; }

.sheets-build {
    padding: 0.9rem;
    overflow-y: auto;
    border-right: 1px solid #1a3a6e;
}

.sheets-head { display: flex; align-items: center; margin-bottom: 0.6rem; }
.sheets-head h3 {
    margin: 0; flex: 1;
    font-size: 0.85rem; color: #60a5fa;
    text-transform: uppercase; letter-spacing: 0.05em;
}
.sheets-head button {
    background: none; border: 0; color: #94a3b8;
    cursor: pointer; font-size: 1rem;
}

.sheets-build label {
    display: block;
    font-size: 0.75rem; color: #94a3b8;
    margin: 0.5rem 0 0.2rem;
}

.sheets-build select,
.sheets-build input[type="text"] {
    width: 100%; box-sizing: border-box;
    background: #0f3460; color: #e2e8f0;
    border: 1px solid #1a3a6e; border-radius: 0.4rem;
    padding: 0.35rem 0.5rem; font-size: 0.82rem;
}

.sheets-row { display: flex; gap: 0.5rem; }
.sheets-row > label { flex: 1; }

.sheets-note {
    font-size: 0.7rem; color: #64748b;
    line-height: 1.4; margin-top: 0.25rem;
}

#sheets-skills {
    border: 1px solid #1a3a6e; border-radius: 0.4rem;
    background: #0f3460; padding: 0.35rem;
    max-height: 230px; overflow-y: auto;
}

.sheets-skill {
    display: flex; align-items: center; gap: 0.35rem;
    padding: 0.15rem 0;
}
.sheets-skill label {
    flex: 1; margin: 0; display: flex;
    align-items: center; gap: 0.35rem;
    font-size: 0.78rem; color: #cbd5e1; cursor: pointer;
}
.sheets-skill input[type="number"] {
    width: 3rem; background: #16213e; color: #e2e8f0;
    border: 1px solid #1a3a6e; border-radius: 0.3rem;
    padding: 0.15rem 0.3rem; font-size: 0.72rem;
}

.sheets-actions {
    display: flex; flex-wrap: wrap;
    gap: 0.35rem; margin-top: 0.7rem;
}
.sheets-actions button {
    flex: 1 1 45%;
    background: #0f3460; color: #e2e8f0;
    border: 1px solid #1a3a6e; border-radius: 0.45rem;
    padding: 0.4rem; font-size: 0.76rem; cursor: pointer;
}
.sheets-actions button:hover:not(:disabled) { background: #1a3a6e; }
.sheets-actions button:disabled { opacity: 0.5; cursor: default; }
.sheets-actions button.primary {
    background: #2563eb; border-color: #3b82f6; color: #fff;
}

.sheets-preview { display: flex; flex-direction: column; overflow: hidden; }

.sheets-tabs {
    display: flex; gap: 0.4rem;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid #1a3a6e;
}
.sheets-tabs button {
    background: #0f3460; color: #94a3b8;
    border: 1px solid #1a3a6e; border-radius: 0.4rem;
    padding: 0.25rem 0.6rem; font-size: 0.74rem; cursor: pointer;
}
.sheets-tabs button.on {
    background: #2563eb; color: #fff; border-color: #3b82f6;
}

#sheets-frame { flex: 1; width: 100%; border: 0; background: #475569; }

.sheets-empty {
    flex: 1; display: flex;
    align-items: center; justify-content: center;
    color: #64748b; font-size: 0.9rem;
    text-align: center; padding: 2rem; line-height: 1.6;
}

.sheets-saved-item {
    border: 1px solid #1a3a6e; border-radius: 0.45rem;
    padding: 0.45rem; margin-bottom: 0.35rem;
    font-size: 0.76rem; color: #cbd5e1;
}
.sheets-saved-item .meta { color: #64748b; font-size: 0.68rem; margin-top: 0.1rem; }
.sheets-saved-item .btns { display: flex; gap: 0.25rem; margin-top: 0.3rem; }
.sheets-saved-item .btns button {
    background: #0f3460; color: #94a3b8;
    border: 1px solid #1a3a6e; border-radius: 0.3rem;
    padding: 0.15rem 0.4rem; font-size: 0.68rem; cursor: pointer;
}

@media (max-width: 900px) {
    .sheets-panel.open { grid-template-columns: 1fr; }
    .sheets-build { border-right: 0; border-bottom: 1px solid #1a3a6e; }
}

.sheets-mode { display: flex; gap: 0.4rem; margin: 0.6rem 0 0.3rem; }
.sheets-mode button {
    flex: 1;
    background: #0f3460; color: #94a3b8;
    border: 1px solid #1a3a6e; border-radius: 0.4rem;
    padding: 0.35rem; font-size: 0.76rem; cursor: pointer;
}
.sheets-mode button.on { background: #2563eb; color: #fff; border-color: #3b82f6; }