/* 定義整個工具站的共用尺寸與色彩變數 */
:root {
    --app-max-width: 1480px;
    --app-radius: 1rem;
    --app-header-bg: rgba(255, 255, 255, 0.92);
    --app-body-bg: #f4f7fb;
    --app-card-bg: #ffffff;
    --app-border: rgba(15, 23, 42, 0.10);
    --app-muted: #64748b;
}

html {
    min-height: 100%;
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background: var(--app-body-bg);
}

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

.app-container {
    max-width: var(--app-max-width);
    margin-inline: auto;
}

.app-header {
    background: var(--app-header-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 1020;
}

.brand-icon {
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    color: white;
    background: linear-gradient(145deg, #2563eb, #4f46e5);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.22);
}

.app-title {
    font-size: clamp(1.05rem, 2vw, 1.35rem);
    font-weight: 750;
    letter-spacing: -0.02em;
}

.app-subtitle {
    font-size: 0.82rem;
}

.language-select {
    min-width: 116px;
}

.hero-card,
.tool-card {
    border-radius: var(--app-radius);
    background: var(--app-card-bg);
}

.tool-card {
    border: 1px solid var(--app-border);
}

/* 工具分頁在窄螢幕允許水平滑動 */
.tool-tabs-wrap {
    position: relative;
}

.tool-tabs {
    gap: 0.45rem;
    padding: 0.25rem 0.1rem 0.5rem;
    scrollbar-width: thin;
}

.tool-tabs .nav-link {
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    border: 1px solid var(--app-border);
    background: var(--app-card-bg);
    color: var(--bs-body-color);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.03);
}

.tool-tabs .nav-link.active {
    border-color: var(--bs-primary);
    background: var(--bs-primary);
    color: white;
}

.form-control,
.form-select,
.input-group-text,
.btn {
    border-radius: 0.65rem;
}

.input-group > .form-control,
.input-group > .form-select,
.input-group > .btn {
    border-radius: 0;
}

.input-group > :first-child {
    border-top-left-radius: 0.65rem;
    border-bottom-left-radius: 0.65rem;
}

.input-group > :last-child {
    border-top-right-radius: 0.65rem;
    border-bottom-right-radius: 0.65rem;
}

textarea.form-control {
    resize: vertical;
    min-height: 92px;
}

.icon-btn {
    width: 34px;
    height: 31px;
    padding: 0;
    display: inline-grid;
    place-items: center;
}

.byte-meter .progress {
    height: 5px;
}

/* 尚未產生結果時的提示區塊 */
.empty-state {
    min-height: 260px;
    display: grid;
    place-items: center;
    align-content: center;
    text-align: center;
    gap: 1rem;
    color: var(--app-muted);
    border: 1px dashed var(--app-border);
    border-radius: 0.85rem;
    padding: 2rem;
}

.empty-state i {
    font-size: 2.2rem;
    opacity: 0.55;
}

.hash-result-item {
    border: 1px solid var(--app-border);
    border-radius: 0.8rem;
    padding: 0.85rem;
    background: rgba(127, 127, 127, 0.035);
}

.hash-output {
    overflow-wrap: anywhere;
    word-break: break-all;
    font-size: 0.88rem;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.result-kv {
    border: 1px solid var(--app-border);
    border-radius: 0.75rem;
    padding: 0.75rem;
    min-width: 0;
}

.result-kv .label {
    color: var(--app-muted);
    font-size: 0.78rem;
    margin-bottom: 0.2rem;
}

.result-kv .value {
    font-weight: 650;
    overflow-wrap: anywhere;
}

.status-panel {
    border-radius: 0.9rem;
    padding: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
}

.status-panel.success {
    background: rgba(25, 135, 84, 0.10);
    border: 1px solid rgba(25, 135, 84, 0.28);
}

.status-panel.danger {
    background: rgba(220, 53, 69, 0.10);
    border: 1px solid rgba(220, 53, 69, 0.28);
}

.status-panel.warning {
    background: rgba(255, 193, 7, 0.12);
    border: 1px solid rgba(255, 193, 7, 0.30);
}

.table-responsive {
    border: 1px solid var(--app-border);
    border-radius: 0.8rem;
}

.benchmark-meter {
    height: 8px;
}

.app-footer {
    background: var(--app-card-bg);
}

.footer-toggle[aria-expanded="false"] .footer-chevron {
    transform: rotate(-90deg);
}

.footer-chevron {
    transition: transform 0.18s ease;
}

.gap-x-3 {
    column-gap: 1rem;
}

.gap-y-1 {
    row-gap: 0.25rem;
}

.min-w-0 {
    min-width: 0;
}

.loading-button {
    pointer-events: none;
    opacity: 0.75;
}

/* 手機和平板窄螢幕的操作空間最佳化 */
@media (max-width: 767.98px) {
    .app-header .app-container {
        padding-left: max(0.75rem, env(safe-area-inset-left));
        padding-right: max(0.75rem, env(safe-area-inset-right));
    }

    main.app-container {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    .brand-icon {
        width: 36px;
        height: 36px;
        flex-basis: 36px;
        border-radius: 10px;
    }

    .app-subtitle {
        display: none;
    }

    .language-select {
        width: 108px;
        min-width: 108px;
        padding-right: 1.8rem;
    }

    .tool-tabs {
        margin-inline: -0.75rem;
        padding-inline: 0.75rem;
    }

    .tool-tabs .nav-link {
        min-height: 42px;
    }

    .card-body {
        overflow: hidden;
    }

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

    /* 尚未產生結果時的提示區塊 */
.empty-state {
        min-height: 180px;
    }

    .input-group > .btn {
        padding-inline: 0.7rem;
    }

    .app-footer .app-container {
        padding-left: max(0.75rem, env(safe-area-inset-left));
        padding-right: max(0.75rem, env(safe-area-inset-right));
        padding-bottom: max(1rem, env(safe-area-inset-bottom));
    }
}

@media (max-width: 420px) {
    .brand-icon {
        display: none;
    }

    .language-select {
        width: 104px;
        min-width: 104px;
    }

    .tool-tabs .nav-link {
        font-size: 0.88rem;
    }
}