:root {
    color-scheme: dark;
    --background: #0f172a;
    --panel: #111827;
    --card: #202020;
    --field: #151515;
    --field-hover: #191919;
    --text: #ffffff;
    --muted: rgba(255, 255, 255, 0.64);
    --quiet: rgba(255, 255, 255, 0.45);
    --line: rgba(255, 255, 255, 0.12);
    --line-soft: rgba(255, 255, 255, 0.065);
    --accent: #a78bfa;
    --accent-strong: #8b5cf6;
    --danger: #fb7185;
    --success: #86efac;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: var(--background);
}

body {
    min-height: 100vh;
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
}

button,
input,
a {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

.page-shell {
    width: min(760px, calc(100% - 28px));
    margin: 0 auto;
    padding: 56px 0 72px;
}

.page-head {
    display: grid;
    gap: 8px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--line);
}

.page-head h1 {
    margin: 0;
    font-size: clamp(34px, 8vw, 54px);
    line-height: 1;
    letter-spacing: -0.035em;
}

.page-head p {
    margin: 0;
    color: var(--muted);
    font-size: 16px;
}

.capacity-panel {
    display: grid;
    gap: 11px;
    margin-top: 24px;
    padding: 22px 24px;
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    background: var(--card);
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
}

.capacity-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 800;
}

.capacity-value {
    overflow: hidden;
    color: rgba(255, 255, 255, 0.78);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-variant-numeric: tabular-nums;
    text-align: right;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.capacity-track,
.large-progress-track {
    width: 100%;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
}

.capacity-track {
    height: 4px;
}

.capacity-progress,
.large-progress-value {
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: #ffffff;
    transition: width 220ms ease;
}

.capacity-panel.offline .capacity-value {
    color: var(--danger);
}

.capacity-panel.offline .capacity-progress {
    width: 0 !important;
}

.mode-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 18px;
}

.mode-button,
.primary-button,
.secondary-button {
    min-height: 44px;
    border: 1px solid transparent;
    border-radius: 10px;
    padding: 11px 16px;
    color: var(--text);
    font-weight: 850;
    text-decoration: none;
    cursor: pointer;
    transition: border-color 140ms ease, background 140ms ease, color 140ms ease, transform 140ms ease, opacity 140ms ease;
}

.mode-button {
    background: rgba(255, 255, 255, 0.075);
    border-color: var(--line-soft);
}

.mode-button:hover:not(:disabled),
.secondary-button:hover:not(:disabled) {
    border-color: rgba(167, 139, 250, 0.5);
    background: rgba(167, 139, 250, 0.13);
}

.mode-button.active {
    border-color: var(--accent);
    background: var(--accent-strong);
}

.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-strong);
    border-color: rgba(255, 255, 255, 0.08);
}

.primary-button:hover:not(:disabled) {
    background: var(--accent);
}

.secondary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.075);
    border-color: var(--line-soft);
}

button:active:not(:disabled),
a:active {
    transform: translateY(1px);
}

button:disabled,
a.disabled {
    cursor: not-allowed;
    opacity: 0.42;
    pointer-events: none;
}

.feature-card {
    overflow: hidden;
    margin-top: 18px;
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    background: var(--card);
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
    animation: card-in 160ms ease both;
}

@keyframes card-in {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-head {
    padding: 24px 24px 19px;
    border-bottom: 1px solid var(--line-soft);
}

.card-eyebrow {
    margin: 0 0 6px;
    color: #d8b4fe;
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.card-head h2 {
    margin: 0;
    font-size: 21px;
    letter-spacing: -0.02em;
}

.card-content {
    display: grid;
    gap: 17px;
    padding: 24px;
}

.picker-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.file-picker {
    display: grid;
    min-height: 144px;
    place-content: center;
    gap: 8px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--field);
    text-align: center;
    cursor: pointer;
    transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
}

.folder-picker {
    width: 100%;
    appearance: none;
    color: var(--text);
    font: inherit;
    text-align: center;
}

.file-picker:hover,
.file-picker:focus-visible,
.file-picker.dragging {
    transform: translateY(-1px);
}

.file-picker:hover,
.file-picker:focus-visible,
.file-picker.dragging {
    border-color: var(--accent);
    background: var(--field-hover);
}

.file-picker-title {
    font-size: 18px;
    font-weight: 900;
}

.file-picker-detail,
.notice-text {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.55;
}

.file-picker.disabled {
    cursor: not-allowed;
    opacity: 0.42;
    pointer-events: none;
}

.folder-preparing {
    display: grid;
    gap: 13px;
    padding: 17px;
    border: 1px solid rgba(167, 139, 250, 0.32);
    border-radius: 12px;
    background: rgba(167, 139, 250, 0.075);
}

.folder-preparing-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 14px;
}

.folder-preparing-head > div {
    display: grid;
    min-width: 0;
    gap: 5px;
}

.folder-preparing-head strong {
    overflow-wrap: anywhere;
    font-size: 15px;
}

.folder-preparing-stats {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    color: var(--muted);
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

.file-summary,
.download-file-info {
    display: grid;
    gap: 12px;
    padding: 16px;
    border: 1px solid var(--line-soft);
    border-radius: 11px;
    background: rgba(255, 255, 255, 0.035);
}

.file-summary > div,
.download-file-info > div,
.result-meta,
.progress-heading > div {
    display: grid;
    min-width: 0;
    gap: 5px;
}

.file-summary strong,
.download-file-info strong,
.result-meta strong,
.progress-heading strong {
    overflow-wrap: anywhere;
    font-size: 15px;
}

.field-group {
    display: grid;
    gap: 8px;
}

.field-label {
    color: var(--muted);
    font-size: 13px;
    font-weight: 800;
}

input {
    width: 100%;
    min-width: 0;
    min-height: 45px;
    border: 1px solid var(--line);
    border-radius: 9px;
    outline: none;
    padding: 10px 12px;
    background: var(--field);
    color: var(--text);
    transition: border-color 140ms ease, box-shadow 140ms ease;
}

input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.13);
}

input::placeholder {
    color: var(--quiet);
}

.secret-input {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    letter-spacing: 0.04em;
}

.secret-input.masked-input {
    -webkit-text-security: disc;
}

.password-row,
.copy-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
}

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

.compact-button {
    min-width: 96px;
    white-space: nowrap;
}

.full-button {
    width: 100%;
}

.notice-text,
.status-text {
    margin: 0;
}

.status-text {
    min-height: 21px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.5;
}

.status-text.error {
    color: var(--danger);
}

.status-text.success {
    color: var(--success);
}

.progress-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 14px;
}

.progress-percent {
    flex: 0 0 auto;
    color: rgba(255, 255, 255, 0.72);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

.large-progress-track {
    height: 6px;
}

.large-progress-value {
    background: var(--accent);
}

.progress-detail {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: var(--muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

.result-title {
    font-size: 22px;
    font-weight: 950;
}

.result-meta {
    padding: 15px 16px;
    border: 1px solid var(--line-soft);
    border-radius: 11px;
    background: rgba(255, 255, 255, 0.035);
}

.hidden {
    display: none !important;
}

@media (max-width: 620px) {
    .page-shell {
        width: min(100% - 20px, 760px);
        padding: 34px 0 48px;
    }

    .capacity-panel,
    .card-head,
    .card-content {
        padding-left: 17px;
        padding-right: 17px;
    }

    .capacity-row {
        align-items: flex-start;
    }

    .capacity-value {
        max-width: 72%;
        font-size: 12px;
    }

    .password-row,
    .copy-row {
        grid-template-columns: 1fr;
    }

    .compact-button {
        width: 100%;
    }
}

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

.selection-summary-row {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
    align-items: end;
    gap: 12px;
}

.file-list,
.upload-progress-list,
.upload-result-list {
    display: grid;
    gap: 8px;
    max-height: 340px;
    overflow: auto;
    overscroll-behavior: contain;
    scrollbar-gutter: stable;
}

.file-list-row,
.upload-progress-item,
.upload-result-item {
    display: grid;
    gap: 9px;
    min-width: 0;
    padding: 12px;
    border: 1px solid var(--line-soft);
    border-radius: 9px;
    background: rgba(0, 0, 0, 0.15);
}

.file-list-row {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
}

.file-list-info,
.upload-result-head {
    display: grid;
    min-width: 0;
    gap: 4px;
}

.file-list-info strong,
.upload-progress-item-head strong,
.upload-result-head strong {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-list-info span,
.upload-result-head span,
.upload-item-detail,
.result-countdown,
.result-error-text {
    color: var(--muted);
    font-size: 12px;
}

.file-remove-button {
    min-width: 72px;
}

.upload-progress-list {
    max-height: 390px;
}

.upload-progress-item-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-width: 0;
}

.upload-item-status {
    flex: 0 0 auto;
    color: var(--muted);
    font-size: 12px;
    white-space: nowrap;
}

.mini-progress-track {
    width: 100%;
    height: 3px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.11);
}

.mini-progress-value {
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: var(--accent);
    transition: width 120ms linear;
}

.upload-item-detail {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-variant-numeric: tabular-nums;
}

.upload-progress-item.complete {
    border-color: rgba(134, 239, 172, 0.24);
}

.upload-progress-item.complete .upload-item-status {
    color: var(--success);
}

.upload-progress-item.error,
.upload-result-item.error {
    border-color: rgba(251, 113, 133, 0.3);
}

.upload-progress-item.error .upload-item-status,
.result-error-text {
    color: var(--danger);
}

.upload-result-list {
    max-height: 440px;
}

.upload-result-item .copy-row input {
    font-size: 12px;
}

.result-countdown {
    font-variant-numeric: tabular-nums;
}

.result-error-text {
    margin: 0;
    line-height: 1.5;
}

.result-actions > button {
    flex: 1 1 180px;
}

@media (max-width: 620px) {
    .picker-grid {
        grid-template-columns: 1fr;
    }

    .file-picker {
        min-height: 126px;
    }

    .folder-preparing-head,
    .folder-preparing-stats {
        align-items: flex-start;
        flex-direction: column;
        gap: 5px;
    }

    .selection-summary-row {
        grid-template-columns: 1fr 1fr;
    }

    .selection-summary-row .compact-button {
        grid-column: 1 / -1;
    }

    .file-list-row {
        grid-template-columns: 1fr;
    }

    .file-remove-button {
        width: 100%;
    }

    .upload-progress-item-head {
        align-items: flex-start;
        flex-direction: column;
        gap: 4px;
    }
}

/* 資安與隱私說明 */
.security-details {
    margin-top: 28px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: rgba(17, 24, 39, 0.52);
}

.security-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 78px;
    padding: 17px 20px;
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: background 140ms ease, border-color 140ms ease;
}

.security-summary::-webkit-details-marker {
    display: none;
}

.security-summary:hover {
    background: rgba(167, 139, 250, 0.075);
}

.security-summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -3px;
}

.security-summary-copy {
    display: grid;
    min-width: 0;
    gap: 5px;
}

.security-summary-copy strong {
    color: var(--text);
    font-size: 15px;
    line-height: 1.4;
}

.security-summary-copy > span {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.55;
}

.security-summary-state {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
    white-space: nowrap;
}

.security-summary-state::after {
    width: 8px;
    height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    content: "";
    transform: rotate(45deg) translateY(-2px);
    transition: transform 150ms ease;
}

.security-state-open {
    display: none;
}

.security-details[open] .security-state-closed {
    display: none;
}

.security-details[open] .security-state-open {
    display: inline;
}

.security-details[open] .security-summary-state::after {
    transform: rotate(225deg) translate(-2px, -2px);
}

.security-content {
    padding: 0 20px 20px;
    border-top: 1px solid var(--line-soft);
    animation: security-content-open 150ms ease both;
}

@keyframes security-content-open {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.security-list {
    display: grid;
    gap: 0;
    margin: 0;
    padding: 8px 0 0 30px;
}

.security-list li {
    padding: 13px 4px 13px 7px;
    border-bottom: 1px solid var(--line-soft);
    color: var(--muted);
}

.security-list li::marker {
    color: var(--accent);
    font-weight: 900;
}

.security-list li strong,
.security-list li span {
    display: block;
}

.security-list li strong {
    margin-bottom: 4px;
    color: var(--text);
    font-size: 13px;
    line-height: 1.45;
}

.security-list li span {
    font-size: 12px;
    line-height: 1.65;
}

.security-list .security-limit strong {
    color: #fda4af;
}

.security-note {
    margin: 16px 0 0;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.65;
}

@media (max-width: 620px) {
    .security-summary {
        align-items: flex-start;
        min-height: 0;
        padding: 15px 16px;
    }

    .security-summary-state {
        padding-top: 2px;
    }

    .security-content {
        padding: 0 16px 17px;
    }

    .security-list {
        padding-left: 25px;
    }
}

.download-item-list {
    display: grid;
    gap: 8px;
    max-height: 360px;
    overflow: auto;
    overscroll-behavior: contain;
    scrollbar-gutter: stable;
}

.download-item-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border: 1px solid var(--line-soft);
    border-radius: 9px;
    background: rgba(0, 0, 0, 0.15);
}

.download-item-info {
    display: grid;
    min-width: 0;
    gap: 4px;
}

.download-item-info strong {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.download-item-info span {
    color: var(--muted);
    font-size: 12px;
}

@media (max-width: 620px) {
    .download-item-row {
        grid-template-columns: 1fr;
    }

    .download-item-link {
        width: 100%;
    }
}