/**
 * 打字練習區樣式
 */

/* Tab 切換 */
.practice-tabs {
    margin-bottom: 1rem;
}

.practice-tab {
    padding: 0.5rem 1.5rem;
    border: none;
    background: transparent;
    color: var(--bs-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.practice-tab:hover {
    color: var(--bs-primary);
}

.practice-tab.active {
    color: var(--bs-primary);
    border-bottom-color: var(--bs-primary);
}

/* 方案按鈕 */
.schema-btn {
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--bs-border-color);
    background: var(--bs-body-bg);
    color: var(--bs-body-color);
    font-size: 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.schema-btn:hover {
    border-color: var(--bs-primary);
    color: var(--bs-primary);
}

.schema-btn.active {
    background: var(--bs-primary);
    border-color: var(--bs-primary);
    color: white;
}

/* 統計數字 */
.practice-stats .stat-box {
    min-width: 50px;
}

.practice-stats .stat-num {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.2;
}

.practice-stats .stat-label {
    font-size: 0.7rem;
    color: var(--bs-secondary);
}

/* 練習面板 */
.practice-panel {
    max-width: 700px;
    margin: 0 auto;
}

/* 當前字顯示 - 左右佈局 */
.char-display {
    min-height: 100px;
}

.char-display .char-left {
    min-width: 100px;
}

.char-display .current-char {
    font-size: 4.5rem;
    font-weight: 300;
    line-height: 1;
    color: var(--bs-body-color);
}

.char-display .current-pinyin {
    font-size: 1.3rem;
    color: var(--bs-secondary);
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    text-align: center;
}

.char-display .hint-code {
    margin-top: 0.5rem;
}

.char-display .hint-code span {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    letter-spacing: 0.15em;
}

/* 輸入按鍵顯示 */
.input-display .input-key {
    width: 56px;
    height: 70px;
    background: var(--bs-body-bg);
    border: 2px solid var(--bs-border-color);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.1s ease;
}

.input-display .input-key .key-char {
    font-size: 1.75rem;
    font-weight: 700;
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    line-height: 1;
}

.input-display .input-key .key-label {
    font-size: 0.65rem;
    color: var(--bs-secondary);
    margin-top: 0.15rem;
}

.input-display .input-key.active {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.input-display .input-key.correct {
    border-color: #facc15;
    background: rgba(250, 204, 21, 0.15);
}

.input-display .input-key.wrong {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.15);
    animation: shake 0.3s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

/* 反饋信息 */
.feedback-msg {
    min-height: 24px;
    font-size: 0.9rem;
    font-weight: 500;
}

.feedback-msg.success {
    color: #28a745;
}

.feedback-msg.error {
    color: #dc3545;
}

/* 虛擬鍵盤 - ulpb 風格 */
.virtual-kb {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 20px 16px;
    background: #1a1f2e;
    border-radius: 12px;
    max-width: 900px;
    margin: 0 auto;
}

.virtual-kb .kb-row {
    display: flex;
    gap: 4px;
}

.virtual-kb .kb-row:nth-child(2) {
    padding-left: 38px;
}

.virtual-kb .kb-row:nth-child(3) {
    padding-left: 76px;
}

.virtual-kb .kb-key {
    width: 80px;
    height: 86px;
    background: #2a3142;
    border: 1px solid #3a4253;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: all 0.08s ease;
    user-select: none;
    position: relative;
    padding: 8px 10px;
}

.virtual-kb .kb-key:active,
.virtual-kb .kb-key.pressed {
    background: #3a4253;
    transform: scale(0.97);
}

/* 按鍵頂部：左大寫 + 右小寫/聲母 */
.virtual-kb .kb-key .key-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    width: 100%;
}

.virtual-kb .kb-key .key-upper {
    font-size: 1.1rem;
    font-weight: 400;
    color: #8b95a5;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', sans-serif;
}

.virtual-kb .kb-key .key-lower {
    font-size: 0.8rem;
    color: #5a6475;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', sans-serif;
}

/* 按鍵底部：韻母映射（橙色） */
.virtual-kb .kb-key .key-sub {
    font-size: 0.95rem;
    color: #f0a030;
    text-align: center;
    font-weight: 400;
    line-height: 1.1;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', sans-serif;
}

/* 空格鍵 */
.virtual-kb .kb-key.kb-space {
    width: 300px;
    justify-content: center;
}

.virtual-kb .kb-key.kb-space .key-top {
    justify-content: center;
}

/* 高亮提示要按的鍵 */
.virtual-kb .kb-key.highlight {
    background: #0f4c2a !important;
    border-color: #22c55e !important;
}

/* 正確 */
.virtual-kb .kb-key.correct {
    background: #4a4a00 !important;
    border-color: #facc15 !important;
}

/* 錯誤 */
.virtual-kb .kb-key.wrong {
    background: #ef4444 !important;
    border-color: #dc2626 !important;
    animation: shake 0.3s ease;
}

/* 盲打練習區 */
.typing-text-area {
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: 1.25rem;
    line-height: 1.8;
    padding: 1rem;
    background: var(--bs-tertiary-bg);
    border-radius: 8px;
    text-align: center;
    min-height: 80px;
}

.typing-text-area .typed {
    color: #28a745;
}

.typing-text-area .cursor {
    color: var(--bs-primary);
    animation: blink 1s infinite;
}

.typing-text-area .remaining {
    color: var(--bs-secondary);
}

.typing-text-area .error {
    color: #dc3545;
    text-decoration: underline;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Dark mode */
[data-bs-theme="dark"] .virtual-kb {
    background: rgba(255,255,255,0.05);
}

[data-bs-theme="dark"] .virtual-kb .kb-key {
    background: var(--bs-body-bg);
    border-color: rgba(255,255,255,0.15);
    box-shadow: 0 2px 0 rgba(0,0,0,0.3);
}

[data-bs-theme="dark"] .typing-text-area {
    background: rgba(255,255,255,0.05);
}

/* 響應式 */
@media (max-width: 920px) {
    .virtual-kb {
        padding: 20px 16px;
        max-width: 100%;
        gap: 6px;
    }

    .virtual-kb .kb-key {
        width: 64px;
        height: 74px;
        padding: 8px 10px 6px;
    }

    .virtual-kb .kb-key .key-upper {
        font-size: 1.1rem;
    }

    .virtual-kb .kb-key .key-lower {
        font-size: 0.8rem;
    }

    .virtual-kb .kb-key .key-sub {
        font-size: 0.85rem;
    }

    .virtual-kb .kb-row {
        gap: 6px;
    }

    .virtual-kb .kb-row:nth-child(2) {
        padding-left: 32px;
    }

    .virtual-kb .kb-row:nth-child(3) {
        padding-left: 64px;
    }

    .virtual-kb .kb-key.kb-space {
        width: 240px;
    }
}

@media (max-width: 768px) {
    .char-display {
        flex-direction: column;
        gap: 1rem !important;
    }

    .char-display .char-left,
    .char-display .char-right {
        text-align: center;
    }

    .virtual-kb {
        padding: 16px 12px;
        gap: 5px;
    }

    .virtual-kb .kb-key {
        width: 54px;
        height: 64px;
        padding: 6px 8px 4px;
    }

    .virtual-kb .kb-key .key-upper {
        font-size: 1rem;
    }

    .virtual-kb .kb-key .key-lower {
        font-size: 0.7rem;
    }

    .virtual-kb .kb-key .key-sub {
        font-size: 0.75rem;
    }

    .virtual-kb .kb-row {
        gap: 5px;
    }

    .virtual-kb .kb-row:nth-child(2) {
        padding-left: 26px;
    }

    .virtual-kb .kb-row:nth-child(3) {
        padding-left: 52px;
    }

    .virtual-kb .kb-key.kb-space {
        width: 200px;
    }
}

@media (max-width: 576px) {
    .char-display .current-char {
        font-size: 3.5rem;
    }

    .input-display .input-key {
        width: 48px;
        height: 58px;
    }

    .input-display .input-key .key-char {
        font-size: 1.4rem;
    }

    .virtual-kb {
        padding: 12px 8px;
        gap: 4px;
    }

    .virtual-kb .kb-key {
        width: 32px;
        height: 46px;
        border-radius: 6px;
        padding: 4px 3px 2px;
    }

    .virtual-kb .kb-key .key-upper {
        font-size: 0.8rem;
    }

    .virtual-kb .kb-key .key-lower {
        font-size: 0.55rem;
    }

    .virtual-kb .kb-key .key-sub {
        font-size: 0.6rem;
    }

    .virtual-kb .kb-row {
        gap: 3px;
    }

    .virtual-kb .kb-row:nth-child(2) {
        padding-left: 16px;
    }

    .virtual-kb .kb-row:nth-child(3) {
        padding-left: 32px;
    }

    .schema-btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.7rem;
    }

    .typing-text-area {
        font-size: 1rem;
    }

    .virtual-kb .kb-key.kb-space {
        width: 120px;
    }
}