/* 全站樣式以 Bootstrap 為基礎 這裡只補充專案 UI 與行動裝置細節 */
:root {
    --app-radius: 1rem;
    --app-soft-bg: rgba(127, 127, 127, 0.07);
}

html,
body {
    min-height: 100%;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bs-tertiary-bg);
}

main {
    flex: 1 0 auto;
}

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

.app-header,
.app-footer {
    background: var(--bs-body-bg);
}

.brand-icon {
    width: 2.8rem;
    height: 2.8rem;
    display: grid;
    place-items: center;
    border-radius: 0.9rem;
    background: var(--bs-primary);
    color: #fff;
    font-size: 1.2rem;
}

.app-card {
    border: 0;
    border-radius: var(--app-radius);
}

.section-title {
    font-weight: 700;
    font-size: 1rem;
}

.code-area,
.font-monospace {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.code-area {
    resize: vertical;
    line-height: 1.55;
}

.output-area {
    min-height: 13rem;
}

.drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 16rem;
    padding: 2rem 1rem;
    border: 2px dashed var(--bs-border-color);
    border-radius: 1rem;
    background: var(--app-soft-bg);
    cursor: pointer;
    text-align: center;
    transition: border-color 0.15s ease, background-color 0.15s ease, transform 0.15s ease;
}

.drop-zone:hover,
.drop-zone.is-dragover {
    border-color: var(--bs-primary);
    background: rgba(var(--bs-primary-rgb), 0.08);
}

.drop-zone.is-dragover {
    transform: scale(1.005);
}

.file-info {
    padding: 0.9rem 1rem;
    border: 1px solid var(--bs-border-color);
    border-radius: 0.8rem;
    background: var(--bs-body-bg);
}

.operation-switch .btn {
    min-width: 8.25rem;
}

.engine-badge {
    min-height: 2.35rem;
    display: inline-flex;
    align-items: center;
    white-space: normal;
    text-align: left;
}

.source-tabs .nav-link {
    border: 1px solid var(--bs-border-color);
    margin-right: 0.35rem;
}

.source-tabs .nav-item:last-child .nav-link {
    margin-right: 0;
}

.language-menu {
    max-height: 19rem;
    overflow-y: auto;
}

.language-menu .dropdown-item.active {
    font-weight: 700;
}

.collapse-chevron {
    transition: transform 0.2s ease;
}

[aria-expanded="true"] .collapse-chevron {
    transform: rotate(180deg);
}

#technologyList .tech-item {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.35rem 0.5rem;
    border-radius: 0.45rem;
    background: var(--app-soft-bg);
}

#technologyList .tech-version {
    white-space: nowrap;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* 手機版縮小間距並讓主要按鈕使用完整寬度 */
@media (max-width: 767.98px) {
    .container-xl {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    .app-card {
        border-radius: 0.8rem;
    }

    .operation-switch,
    .operation-switch .btn {
        width: 100%;
    }

    #languageButton {
        max-width: 100%;
    }

    .drop-zone {
        min-height: 12rem;
        padding: 1.5rem 0.75rem;
    }

    .output-area {
        min-height: 11rem;
    }

    .btn-lg {
        width: 100%;
    }

    #footerDetails {
        font-size: 0.9rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}