/* ============================================================
   Симулятор "Машина Тьюринга" - специфичные стили.
   Общие токены и компоненты - в ../base.css (подключать первым).
   Светлая тема, только var(--...) из base.css.
   ============================================================ */

/* ==================== ЛЕНТА ПАМЯТИ ==================== */
.tape-display-section {
    overflow: hidden;
    width: 100%;
    max-width: 100%;
}

.tape-container {
    display: flex;
    align-items: center;
    min-height: 96px;
    position: relative;
    padding: var(--spacing-sm) 0;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) transparent;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.tape {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 4px;
    transition: transform 0.3s ease;
    padding: 0 20px;
    margin: 0 auto;
}

.tape-cell {
    width: 42px;
    height: 46px;
    min-width: 42px;
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.4rem;
    font-weight: 700;
    font-family: var(--font-mono);
    background: var(--bg-card);
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    position: relative;
    transition: all 0.2s ease;
}

/* Ячейка под головкой */
.tape-cell.active {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
    color: var(--color-primary-dark);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
    transform: scale(1.08);
    z-index: 2;
}

.tape-cell.active::after {
    content: '\25B2';
    position: absolute;
    bottom: -24px;
    color: var(--color-primary);
    font-size: 1rem;
    animation: bounce 1s infinite alternate;
}

.tape-cell.active::before {
    content: 'Головка';
    position: absolute;
    bottom: -40px;
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-family: var(--font-family);
    white-space: nowrap;
}

@keyframes bounce {
    from { transform: translateY(0); }
    to { transform: translateY(4px); }
}

.state-indicator {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    min-height: 38px;
    max-width: 100%;
    padding: 6px 12px;
    background: var(--color-primary);
    color: #ffffff;
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: var(--radius-md);
    word-break: break-all;
    overflow-wrap: anywhere;
    box-sizing: border-box;
    text-align: center;
    line-height: 1.3;
}

/* ==================== ТАБЛО КОМАНДЫ ==================== */
.command-label {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 10px;
}

.command-text {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    background: var(--bg-secondary);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    display: inline-block;
    min-width: 200px;
    max-width: 100%;
    word-break: break-word;
    white-space: pre-wrap;
    box-sizing: border-box;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.command-text.active {
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
    background: var(--color-primary-bg);
}

.command-text.terminal {
    color: var(--color-success);
    border-color: #bbf7d0;
    background: #f0fdf4;
}

.command-text.stopped {
    color: var(--text-tertiary);
}

.execution-log .log-completion-row td,
.execution-log tr.log-completion-row td {
    text-align: center;
    font-weight: 600;
    background: var(--color-primary-bg) !important;
    color: var(--color-primary-dark) !important;
    border-bottom: none;
    word-break: normal;
    white-space: normal;
    width: auto !important;
}

.execution-log.collapsed {
    display: none !important;
}

/* ==================== ГЛАВНЫЙ GRID ==================== */
.main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-areas: 
        "input exec"
        "editor exec";
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.main-grid .section {
    margin-bottom: 0;
}

.word-input-section { grid-area: input; }
.editor-section { 
    grid-area: editor; 
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.execution-section {
    grid-area: exec;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* ==================== РЕДАКТОР ==================== */
.text-input.mono,
.mono {
    font-family: var(--font-mono);
}

.rules-textarea {
    min-height: 260px;
    max-height: 600px;
    resize: vertical;
    overflow: auto !important;
    white-space: pre;
    font-family: var(--font-mono);
    line-height: 1.5;
    display: block;
    width: 100%;
    box-sizing: border-box;
}

#tab-code.active,
.tab-content.active#tab-code {
    display: flex !important;
    flex-direction: column !important;
    flex: 1 1 auto;
    gap: var(--spacing-md) !important;
}

#tab-code.active .rules-textarea {
    flex: 1 1 auto;
    min-height: 220px;
}

.syntax-hint {
    background: var(--color-primary-bg);
    border-left: 3px solid var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    word-break: break-word;
    overflow-wrap: anywhere;
    box-sizing: border-box;
}

.syntax-hint strong {
    color: var(--text-primary);
    font-weight: 700;
    font-size: 0.95rem;
}

.syntax-hint code {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1px 6px;
    border-radius: 4px;
    color: var(--color-primary-dark);
    font-family: var(--font-mono);
    word-break: break-word;
    overflow-wrap: anywhere;
    white-space: normal;
}

.syntax-hint p {
    margin: 8px 0 0;
}

.syntax-hint .syntax-note {
    margin-top: 6px;
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

/* ==================== АЛФАВИТ ==================== */
.alphabet-display {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    word-break: break-word;
    box-sizing: border-box;
}

.alphabet-display span:first-child,
.alphabet-display strong {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
}

.alphabet-chars {
    font-family: var(--font-mono);
    color: var(--color-primary-dark);
    letter-spacing: 3px;
    font-size: 1.05rem;
    font-weight: 600;
    word-break: break-word;
    overflow-wrap: anywhere;
}

/* ==================== ВКЛАДКИ (Код / Описание / Тесты) ==================== */
.tabs-header {
    display: none; /* Скрыто до JS если есть вкладки */
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-md);
    padding: 0;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.tab-btn {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

/* ==================== ОПИСАНИЕ ЗАДАЧИ ==================== */
.desc-box {
    background: var(--color-primary-bg);
    border-left: 3px solid var(--color-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.95em;
    line-height: 1.6;
    max-height: 450px;
    overflow-y: auto;
    word-break: break-word;
    overflow-wrap: anywhere;
}

.desc-box h4 {
    margin: 15px 0 8px;
    color: var(--text-primary);
    font-size: 1.05em;
    font-weight: 600;
}

.desc-box h4:first-child {
    margin-top: 0;
}

.desc-box p {
    margin-bottom: 10px;
}

.desc-box strong {
    color: var(--text-primary);
    font-weight: 600;
}

.desc-box code {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1px 5px;
    border-radius: 4px;
    color: var(--color-primary-dark);
    font-family: var(--font-mono);
    font-size: 0.9em;
    word-break: break-word;
    overflow-wrap: anywhere;
    white-space: normal;
}

.desc-box .list-item {
    margin: 4px 0 4px 15px;
    color: var(--text-secondary);
}

/* ==================== ТЕСТЫ ==================== */
.tests-box {
    max-height: 450px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: 2px;
}

.test-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
    text-align: left;
    box-sizing: border-box;
}

.test-item:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
}

.test-io {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    word-break: break-word;
}

.test-inp {
    font-weight: 600;
    color: var(--color-primary-dark);
}

.test-out {
    color: var(--color-success);
    font-weight: 500;
}

.test-arrow {
    color: var(--text-tertiary);
}

.test-comment {
    margin-left: auto;
    font-size: 0.8em;
    color: var(--text-tertiary);
    font-style: italic;
    font-family: var(--font-family);
}

/* ==================== ПРОТОКОЛ ВЫПОЛНЕНИЯ ==================== */
.execution-log {
    flex: 1 1 0;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
}

.execution-log table {
    width: 100%;
    border-collapse: collapse;
}

.execution-log th,
.execution-log td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.execution-log th {
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 0.8rem;
    z-index: 1;
}

.execution-log td:first-child {
    color: var(--text-tertiary);
    width: 40px;
}

.execution-log tbody tr:nth-child(even) {
    background: var(--bg-secondary);
}

.execution-log tr:hover {
    background: var(--bg-tertiary);
}

.execution-log .current-step {
    background: var(--color-primary-bg);
}

/* ==================== СТАТИСТИКА ==================== */
.stats-mini {
    display: grid;
    grid-template-columns: minmax(0, 0.65fr) minmax(0, 0.8fr) minmax(0, 0.95fr) minmax(0, 1.6fr);
    gap: var(--spacing-sm) var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    box-sizing: border-box;
    width: 100%;
    margin-top: 15px;
    text-align: center;
}

.stats-mini > div {
    min-width: 0;
}

.stats-mini strong {
    color: var(--text-primary);
}

.stats-mini > div:last-child strong {
    display: block;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
    line-height: 1.35;
}

/* ==================== ТИПОВЫЕ ЗАДАЧИ ==================== */
.tasks-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    align-items: start;
}

@media (max-width: 1000px) {
    .tasks-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 560px) {
    .tasks-grid {
        grid-template-columns: 1fr;
    }
}

.task-category {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.task-category h3 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.task-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.task-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    max-width: 100%;
    white-space: normal;
    word-break: break-word;
}

.task-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
}

.task-btn.active {
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
    background: var(--color-primary-bg);
    font-weight: 600;
}

.task-btn:active {
    transform: scale(0.97);
}

/* ==================== АДАПТИВНОСТЬ (320px и мобильные устройства) ==================== */
@media (max-width: 900px) {
    .main-grid {
        grid-template-columns: 1fr;
        grid-template-areas: 
            "input"
            "exec"
            "editor";
        display: grid;
        gap: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }

    .execution-log:not(.collapsed) {
        flex: 0 0 320px !important;
        height: 320px !important;
        min-height: 320px !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }

    .execution-log.collapsed {
        display: none !important;
        height: 0 !important;
        min-height: 0 !important;
    }

    .execution-log table {
        table-layout: fixed !important;
        width: 100% !important;
        max-width: 100% !important;
        border-collapse: collapse !important;
    }

    .execution-log thead,
    .execution-log tbody,
    .execution-log tr,
    .execution-log th,
    .execution-log td {
        min-width: 0 !important;
        box-sizing: border-box !important;
    }

    .execution-log th,
    .execution-log td {
        word-break: break-word !important;
        overflow-wrap: break-word !important;
        white-space: normal !important;
        padding: 4px 1px !important;
        text-align: center !important;
        vertical-align: middle !important;
    }

    .execution-log th {
        font-size: 0.7rem !important;
        line-height: 1.15 !important;
        font-weight: 600 !important;
        hyphens: auto !important;
        -webkit-hyphens: auto !important;
    }

    .execution-log th:first-child,
    .execution-log td:first-child {
        width: 1.2em !important;
    }

    .execution-log th:nth-child(2),
    .execution-log td:nth-child(2) {
        width: 25% !important;
    }

    .execution-log th:nth-child(3),
    .execution-log td:nth-child(3) {
        width: 16% !important;
    }

    .execution-log th:nth-child(4),
    .execution-log td:nth-child(4) {
        width: 21% !important;
    }

    .execution-log th:nth-child(5),
    .execution-log td:nth-child(5) {
        width: 36% !important;
    }
}

@media (max-width: 768px) {
    .state-indicator {
        font-size: 0.95rem;
        padding: 4px 10px;
        min-height: 32px;
        word-break: break-all;
    }

    .tape-container {
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    .tape-container::-webkit-scrollbar {
        display: none;
    }

    .tape {
        gap: 3px;
        padding: 0 10px;
    }

    .tape-cell {
        width: 32px;
        height: 36px;
        min-width: 32px;
        font-size: 1.05rem;
    }

    .tape-cell.active::before {
        font-size: 0.65rem;
        bottom: -34px;
    }

    .command-text {
        font-size: 1.4rem;
    }
}

@media (max-width: 480px) {
    .tape-cell {
        width: 30px;
        height: 34px;
        min-width: 30px;
        font-size: 0.95rem;
    }

    .tape {
        gap: 3px;
        padding: 0 8px;
    }

    .tape-container {
        min-height: 76px;
        padding: 2px 0;
    }

    .tape-cell.active::before {
        font-size: 0.6rem;
        bottom: -32px;
    }

    .tape-cell.active::after {
        font-size: 0.8rem;
        bottom: -18px;
    }

    .stats-mini {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 6px 2px !important;
        padding: 10px 6px !important;
        font-size: 0.8rem !important;
    }

    .stats-mini > div:last-child {
        grid-column: 1 / -1;
        margin-top: 2px;
        padding-top: 6px;
        border-top: 1px dashed var(--border-color);
    }

    .stats-mini > div:last-child strong {
        white-space: normal !important;
        word-break: break-word !important;
        overflow-wrap: anywhere !important;
    }
}

@media (max-width: 380px) {
    .tabs-header {
        gap: var(--spacing-sm);
    }

    .tab-btn {
        font-size: 0.85rem;
    }

    .syntax-hint {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .test-comment {
        margin-left: 0;
        width: 100%;
        margin-top: 4px;
    }
}

/* --- Кнопка копирования --- */
.code-wrap { position: relative; }
.code-copy-btn {
    position: absolute; top: 8px; right: 20px; width: 30px; height: 30px;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); color: var(--text-tertiary);
    cursor: pointer; transition: all var(--transition-fast);
}
.code-copy-btn:hover { color: var(--color-primary); border-color: var(--color-primary); }
.code-copy-btn.copied { color: var(--color-success); border-color: #bbf7d0; background: #f0fdf4; }