* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-app: #1e1e1e;
    --bg-pane: #252526;
    --bg-header: #333333;
    --text-primary: #d4d4d4;
    --text-secondary: #808080;
    --border: #3c3c3c;
    --accent: #0e639c;
    --accent-hover: #1177bb;
    --success: #4ec9b0;
}

body {
    font-family: 'Consolas', 'Monaco', monospace;
    background: var(--bg-app);
    color: var(--text-primary);
    min-height: 100vh;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border);
}

.header h1 {
    font-size: 1rem;
    font-weight: 500;
}

.btn-primary, .btn-secondary {
    padding: 0.4rem 0.8rem;
    border: none;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-pane);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

.main-content {
    flex: 1;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* モードタブ */
.mode-tabs {
    display: flex;
    gap: 0.25rem;
    background: var(--bg-pane);
    padding: 0.25rem;
    border-radius: 6px;
    width: fit-content;
}

.mode-tab {
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

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

.mode-tab.active {
    background: var(--accent);
    color: white;
}

.mode-content.hidden {
    display: none;
}

/* 入力セクション */
.input-section {
    background: var(--bg-pane);
    border-radius: 6px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-secondary);
    border-radius: 6px 6px 0 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    cursor: pointer;
}

textarea {
    width: 100%;
    min-height: 120px;
    padding: 0.75rem;
    background: var(--bg-pane);
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    line-height: 1.5;
    resize: vertical;
    outline: none;
}

textarea::placeholder {
    color: var(--text-secondary);
}

/* ファイルドロップゾーン */
.file-drop-zone {
    min-height: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    border: 2px dashed var(--border);
    cursor: pointer;
    transition: all 0.2s;
}

.file-drop-zone:hover,
.file-drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(14, 99, 156, 0.1);
}

.drop-content {
    text-align: center;
    color: var(--text-secondary);
}

.drop-content svg {
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.drop-content p {
    font-size: 0.85rem;
}

.file-info {
    display: flex;
    gap: 1rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
    color: var(--success);
    background: var(--bg-header);
}

.file-info.hidden {
    display: none;
}

/* アルゴリズム選択 */
.algorithm-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.75rem;
    background: var(--bg-pane);
    border-radius: 6px;
}

.algo-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.algo-checkboxes {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.algo-checkbox {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8rem;
    cursor: pointer;
}

.algo-checkbox input:checked + span {
    color: var(--success);
}

/* 結果セクション */
.result-section {
    flex: 1;
    background: var(--bg-pane);
    border-radius: 6px;
}

.case-toggle {
    display: flex;
    background: var(--bg-app);
    border-radius: 3px;
    overflow: hidden;
}

.case-btn {
    padding: 0.2rem 0.5rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
}

.case-btn.active {
    background: var(--accent);
    color: white;
}

.results {
    padding: 0.75rem;
}

.result-placeholder {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
}

.result-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.result-item:last-child {
    border-bottom: none;
}

.result-algo {
    min-width: 80px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.result-hash {
    flex: 1;
    font-size: 0.8rem;
    color: var(--success);
    word-break: break-all;
    font-family: inherit;
}

.result-copy {
    padding: 0.25rem 0.5rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
}

.result-copy:hover {
    background: var(--border);
    color: var(--text-primary);
}

/* HMACセクション */
.hmac-section {
    background: var(--bg-pane);
    border-radius: 6px;
    margin-top: 1rem;
}

.hmac-content {
    padding: 0.75rem;
}

.hmac-input-group {
    margin-bottom: 0.75rem;
}

.hmac-input-group label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.hmac-input-group input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
}

.hmac-input-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.hmac-result {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.hmac-hash {
    flex: 1;
    padding: 0.5rem 0.75rem;
    background: var(--bg-app);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--success);
    word-break: break-all;
    min-height: 2rem;
}

.algo-select {
    padding: 0.25rem 0.5rem;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.75rem;
    cursor: pointer;
}

/* 検証セクション */
.verify-section {
    background: var(--bg-pane);
    border-radius: 6px;
    margin-top: 1rem;
}

.verify-input-wrapper {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem;
}

.verify-input-wrapper input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
}

.verify-input-wrapper input:focus {
    outline: none;
    border-color: var(--accent);
}

.verify-status {
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
}

.verify-status.match {
    background: rgba(78, 201, 176, 0.2);
    color: var(--success);
}

.verify-status.mismatch {
    background: rgba(241, 76, 76, 0.2);
    color: var(--error);
}

.verify-status.warning {
    color: var(--text-secondary);
}

/* フッター */
.footer {
    padding: 0.5rem 1rem;
    background: var(--bg-header);
    border-top: 1px solid var(--border);
    font-size: 0.7rem;
    color: var(--text-secondary);
}

/* トースト */
.toast {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    background: var(--success);
    color: var(--bg-app);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.2s;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* 比較セクション */
.compare-section {
    padding: 0.5rem 1rem;
    background: var(--bg-pane);
    border-bottom: 1px solid var(--border);
}

.compare-input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.compare-input {
    flex: 1;
    padding: 0.5rem;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: 'Consolas', monospace;
    font-size: 0.85rem;
}

.compare-result {
    font-weight: bold;
    font-size: 0.9rem;
    min-width: 80px;
}

.compare-result.match {
    color: #3fb950;
}

.compare-result.mismatch {
    color: #f85149;
}

/* レスポンシブ */
@media (max-width: 768px) {
    .algorithm-section {
        flex-direction: column;
        align-items: flex-start;
    }

    .result-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    .result-algo {
        min-width: auto;
    }
}