body {
    min-height: 100vh;
    background: radial-gradient(circle at 18% 12%, rgba(0, 122, 255, 0.18), transparent 45%),
        radial-gradient(circle at 86% 18%, rgba(52, 199, 89, 0.16), transparent 45%),
        var(--color-bg-gradient);
    padding: 96px 20px 28px;
}

.page-shell {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
}

.panel {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

[data-theme="dark"] .panel {
    background: rgba(29, 29, 31, 0.88);
    border-color: rgba(255, 255, 255, 0.12);
}

.panel-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border-light);
}

.eyebrow {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
}

.panel-header h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: 8px;
}

.subtitle {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    max-width: 720px;
}

.subtitle code {
    background: rgba(0, 122, 255, 0.1);
    padding: 2px 6px;
    border-radius: 999px;
    color: var(--color-primary);
    font-size: 0.95em;
}

.header-actions {
    flex-shrink: 0;
}

.action-btn {
    border: none;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: #fff;
    padding: 10px 16px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.action-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
}

.status-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px var(--spacing-xl);
    background: rgba(0, 122, 255, 0.06);
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

[data-theme="dark"] .status-bar {
    background: rgba(0, 122, 255, 0.12);
}

.status-bar a {
    color: var(--color-primary);
    text-decoration: none;
}

.status-bar a:hover {
    text-decoration: underline;
}

.message {
    margin: var(--spacing-md) var(--spacing-xl) 0;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
}

.message.error {
    background: rgba(255, 59, 48, 0.12);
    color: #b42318;
    border: 1px solid rgba(255, 59, 48, 0.2);
}

.message.success {
    background: rgba(52, 199, 89, 0.12);
    color: #027a48;
    border: 1px solid rgba(52, 199, 89, 0.2);
}

[data-theme="dark"] .message.error {
    color: #ffb4ae;
}

[data-theme="dark"] .message.success {
    color: #9ef0b0;
}

.search-panel,
.history-panel {
    margin: var(--spacing-md) var(--spacing-xl) 0;
    padding: 16px;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.5);
}

[data-theme="dark"] .search-panel,
[data-theme="dark"] .history-panel {
    background: rgba(255, 255, 255, 0.03);
}

.search-panel h2,
.history-panel h2 {
    font-size: var(--font-size-md);
    margin-bottom: 12px;
}

.search-form {
    display: grid;
    grid-template-columns: minmax(260px, 1.4fr) auto auto auto;
    gap: 10px;
    align-items: end;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.field label {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.field input {
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    padding: 12px 14px;
    font-size: var(--font-size-sm);
    outline: none;
}

.field input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.12);
}

.keyword-field {
    min-width: 0;
}

.primary-btn {
    height: 44px;
    white-space: nowrap;
}

.secondary-btn {
    height: 44px;
    padding: 0 14px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.secondary-btn:hover {
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.helper-grid {
    margin-top: 14px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.helper-card {
    border: 1px solid var(--color-border-light);
    border-radius: 12px;
    background: var(--color-bg-primary);
    padding: 12px;
}

.helper-card h3 {
    font-size: var(--font-size-sm);
    margin-bottom: 10px;
}

.helper-card ul {
    margin: 0;
    padding-left: 18px;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip-btn {
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    border-radius: 999px;
    padding: 6px 10px;
    font-size: var(--font-size-xs);
    cursor: pointer;
}

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

.history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.text-btn {
    border: none;
    background: transparent;
    color: var(--color-primary);
    cursor: pointer;
    font-size: var(--font-size-sm);
}

.text-btn:hover {
    text-decoration: underline;
}

.history-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-height: 30px;
}

.history-empty {
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
}

.history-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-primary);
    border-radius: 999px;
    padding: 6px 10px;
    max-width: 100%;
}

.history-keyword-btn {
    border: none;
    background: transparent;
    color: var(--color-text-primary);
    cursor: pointer;
    font-size: var(--font-size-sm);
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-open-btn {
    border: none;
    background: rgba(0, 122, 255, 0.1);
    color: var(--color-primary);
    border-radius: 999px;
    padding: 4px 8px;
    font-size: var(--font-size-xs);
    cursor: pointer;
}

@media (max-width: 980px) {
    .search-form {
        grid-template-columns: 1fr 1fr;
    }

    .search-form .keyword-field {
        grid-column: 1 / -1;
    }

    .helper-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    body {
        padding: 88px 14px 20px;
    }

    .panel-header {
        flex-direction: column;
        align-items: stretch;
    }

    .search-panel,
    .history-panel {
        margin: 12px;
        padding: 12px;
    }

    .status-bar {
        padding: 10px 12px;
    }

    .message {
        margin: 12px 12px 0;
    }

    .search-form {
        grid-template-columns: 1fr;
    }

    .primary-btn,
    .secondary-btn {
        width: 100%;
    }

    .history-item {
        width: 100%;
        justify-content: space-between;
        border-radius: 12px;
    }

    .history-keyword-btn {
        max-width: calc(100% - 70px);
        text-align: left;
    }
}