/* ==========================================================================
   Project Archiver — refined design system
   Light-first with automatic dark mode. Single blue accent.
   Layered over Bootstrap 5: re-themes core components + utilities via tokens.
   ========================================================================== */

:root {
    color-scheme: light;

    /* Type */
    --font-sans: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Bricolage Grotesque', var(--font-sans);
    --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

    /* Canvas & surfaces */
    --bg: #f5f6f9;
    --bg-tint: 37, 99, 235;          /* accent rgb, used for faint glows */
    --surface: #ffffff;
    --surface-2: #f3f5f8;
    --surface-3: #eceff4;
    --border: #e6e9ee;
    --border-strong: #d6dbe3;

    /* Text */
    --text: #131722;
    --text-muted: #5b6573;
    --text-faint: #8a93a2;

    /* Accent — blue in light mode, orange in dark (see [data-theme="dark"]) */
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-contrast: #ffffff;
    --accent-rgb: 37, 99, 235;        /* drives accent-tinted shadows/glows */
    --accent-soft: #eaf1ff;
    --accent-line: #cfe0ff;
    --ring: 0 0 0 3px rgba(var(--accent-rgb), 0.30);

    /* Semantic */
    --success: #16a34a;
    --success-hover: #15803d;
    --success-soft: #e9f8ef;
    --success-line: #c2ecd1;
    --warning: #d97706;
    --info: #0ea5e9;
    --danger: #dc2626;
    --danger-soft: #fdecec;

    /* Elevation */
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
    --shadow: 0 1px 3px rgba(16, 24, 40, 0.07), 0 10px 28px -14px rgba(16, 24, 40, 0.18);
    --shadow-lg: 0 18px 48px -18px rgba(16, 24, 40, 0.26);

    /* Geometry */
    --radius: 14px;
    --radius-sm: 10px;
    --radius-xs: 8px;
    --radius-pill: 999px;
}

/* Dark palette. Applied via a data-theme attribute on <html> that an inline
   head script sets from localStorage, falling back to the OS preference — so a
   manual toggle can override the system setting and the choice persists. */
:root[data-theme="dark"] {
    color-scheme: dark;

    --bg: #0c0f16;
    --surface: #141925;
    --surface-2: #1a2031;
    --surface-3: #232b3c;
    --border: #262e3d;
    --border-strong: #354056;

    --text: #e7eaf1;
    --text-muted: #9aa3b3;
    --text-faint: #6b7585;

    --bg-tint: 251, 146, 60;          /* warm ambient glow in dark mode */
    --accent: #fb923c;
    --accent-hover: #fdba74;
    --accent-contrast: #1a1206;
    --accent-rgb: 251, 146, 60;
    --accent-soft: rgba(251, 146, 60, 0.15);
    --accent-line: rgba(251, 146, 60, 0.34);
    --ring: 0 0 0 3px rgba(251, 146, 60, 0.40);

    --success: #36d27f;
    --success-hover: #54dd92;
    --success-soft: rgba(54, 210, 127, 0.14);
    --success-line: rgba(54, 210, 127, 0.32);
    --danger: #f3736f;
    --danger-soft: rgba(243, 115, 111, 0.14);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 16px 40px -18px rgba(0, 0, 0, 0.7);
    --shadow-lg: 0 24px 60px -20px rgba(0, 0, 0, 0.8);
}

/* ------------------------------------------------------------------ Base -- */

* { box-sizing: border-box; }

html { height: 100%; }

body {
    /* App-shell layout: fixed-height viewport with a scrollable middle, so the
       nav stays pinned at the top and the footer is always visible (sticky). */
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin: 0;
    font-family: var(--font-sans);
    font-size: 15.5px;
    line-height: 1.55;
    color: var(--text);
    background-color: var(--bg);
    background-image:
        radial-gradient(900px 480px at 88% -8%, rgba(var(--bg-tint), 0.08), transparent 60%),
        radial-gradient(720px 420px at -6% 4%, rgba(var(--bg-tint), 0.06), transparent 55%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.015em;
    color: var(--text);
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

code, kbd, samp, pre { font-family: var(--font-mono); }

::selection { background: var(--accent); color: var(--accent-contrast); }

/* Consistent, accessible focus ring (replaces blanket outline removal) */
:focus { outline: none; }
:focus-visible {
    outline: none;
    box-shadow: var(--ring);
    border-radius: var(--radius-xs);
}
.btn:focus-visible,
.form-control:focus-visible,
.app-nav__link:focus-visible { box-shadow: var(--ring); }

/* Scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: var(--radius-pill);
    border: 3px solid transparent;
    background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-faint); background-clip: content-box; }

/* --------------------------------------------------------------- Navbar -- */

.app-nav {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: color-mix(in srgb, var(--surface) 82%, transparent);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--border);
}

.app-nav__inner {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0.7rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.app-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.12rem;
    letter-spacing: -0.02em;
}
.app-brand:hover { color: var(--text); }

.app-brand__mark {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    color: #fff;
    font-size: 1rem;
    background: linear-gradient(145deg, var(--accent), var(--accent-hover));
    box-shadow: 0 6px 16px -6px rgba(var(--accent-rgb), 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.app-brand__text span { color: var(--accent); }

.app-nav__links { display: flex; align-items: center; gap: 0.25rem; }

.app-nav__link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.45rem 0.85rem;
    border-radius: var(--radius-pill);
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.94rem;
    transition: color 0.15s ease, background-color 0.15s ease;
}
.app-nav__link:hover { color: var(--text); background: var(--surface-2); }
.app-nav__link.is-active { color: var(--accent); background: var(--accent-soft); }
.app-nav__link i { font-size: 1rem; }

.app-nav__toggle {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    margin-left: 0.35rem;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--surface-2);
    color: var(--text-muted);
    font-size: 1.02rem;
    cursor: pointer;
    transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}
.app-nav__toggle:hover { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }
.app-nav__toggle:active { transform: scale(0.94); }
.app-nav__toggle .bi { display: none; line-height: 1; }
/* Show the icon for the currently active theme. */
:root[data-theme="dark"] .app-nav__toggle .theme-icon--dark { display: block; }
:root:not([data-theme="dark"]) .app-nav__toggle .theme-icon--light { display: block; }

@media (max-width: 560px) {
    .app-nav__link span { display: none; }
    .app-brand__text { display: none; }
}

/* ----------------------------------------------------------- Layout/foot -- */

.app-main {
    flex: 1 1 auto;
    min-height: 0;          /* allow the scroll area to shrink within the flex column */
    overflow-y: auto;
    padding: 1.6rem 0 2rem;
    display: flex;
    flex-direction: column;
}
/* Container stays centred (max-width + auto margins) within the flex column. */
.app-main > .container { width: 100%; }
.app-main .container { max-width: 1140px; }

.app-footer {
    flex-shrink: 0;
    border-top: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-faint);
    padding: 0.8rem 0;
}
.app-footer .container {
    max-width: 1140px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    font-size: 0.82rem;
}
.app-footer__brand { font-weight: 600; color: var(--text-muted); }
@media (max-width: 560px) {
    .app-footer .container { flex-direction: column; gap: 0.2rem; text-align: center; }
}

/* ---------------------------------------------------------------- Cards -- */

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border);
    padding: 1.05rem 1.3rem;
    font-weight: 600;
}
.card-header h4, .card-header h5, .card-header h6 { margin: 0; display: flex; align-items: center; gap: 0.55rem; }
.card-header h5 { font-size: 1.05rem; }
.card-header h6 { font-size: 0.95rem; }
.card-header i { color: var(--accent); }
.card-body { padding: 1.3rem; }
.card-footer {
    background: var(--surface-2);
    border-top: 1px solid var(--border);
    padding: 1rem 1.3rem;
}

/* Consolidated-card helpers */
.options-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0 0 0.85rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--border);
}
.options-title i { color: var(--accent); }
.browser-hint { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.file-pane { height: 188px; overflow-y: auto; }

/* On wide screens, let the active mode's card fill the available vertical space
   between the header and the footer (within the page padding), with the folder
   browser growing into the extra room. On narrow screens the card keeps its
   natural height and the page scrolls. */
@media (min-width: 992px) {
    .options-col { border-left: 1px solid var(--border); }

    .app-main > .container:has(.mode-content),
    .app-main > .container:has(.cloud-panel) {
        display: flex;
        flex-direction: column;
        flex: 1 1 auto;
        min-height: 0;
    }
    .mode-content, .cloud-panel { flex: 1 1 auto; min-height: 0; }
    .mode-content > .card, .cloud-panel > .card {
        height: 100%;
        display: flex;
        flex-direction: column;
    }
    .mode-content > .card > .card-header, .cloud-panel > .card > .card-header,
    .mode-content > .card > .card-footer, .cloud-panel > .card > .card-footer {
        flex-shrink: 0;
    }
    .mode-content .card-body, .cloud-panel .card-body {
        flex: 1 1 auto;
        min-height: 0;
        display: flex;
        flex-direction: column;
    }
    .mode-content .card-grid, .cloud-panel .card-grid {
        flex: 1 1 auto;
        min-height: 0;
        flex-wrap: nowrap;
    }
    .mode-content .browse-col, .cloud-panel .browse-col {
        display: flex;
        flex-direction: column;
        min-height: 0;
    }
    .mode-content .file-pane { height: auto; min-height: 140px; flex: 1 1 auto; }
    /* In cloud mode the drop zone grows to fill the room. */
    .cloud-panel .browse-col .dropzone { flex: 1 1 auto; min-height: 160px; }
}

/* ----------------------------------------------------------- Mode header -- */

.mode-header {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.05rem 1.4rem;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: border-color 0.3s ease, background-color 0.3s ease;
}
.mode-header::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 4px;
    background: var(--accent);
}
.mode-header h2 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
    margin: 0;
    color: var(--text);
}
.mode-header p { margin: 0.15rem 0 0; color: var(--text-muted); font-size: 0.92rem; }
.mode-header h2 i { color: var(--accent); }

.mode-header.create-mode { background: linear-gradient(180deg, var(--accent-soft), var(--surface) 70%); border-color: var(--accent-line); }
.mode-header.create-mode::before { background: var(--accent); }
.mode-header.retrieve-mode { background: linear-gradient(180deg, var(--success-soft), var(--surface) 70%); border-color: var(--success-line); }
.mode-header.retrieve-mode::before { background: var(--success); }
.mode-header.retrieve-mode h2 i { color: var(--success); }

/* ----------------------------------------------------- Mode toggle (seg) -- */

.btn-group.mode-toggle {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    padding: 5px;
    gap: 4px;
    box-shadow: inset 0 1px 2px rgba(16, 24, 40, 0.04);
}
.mode-toggle .btn {
    flex: 1;
    border: none !important;
    border-radius: var(--radius-pill) !important;
    background: transparent;
    color: var(--text-muted);
    font-weight: 600;
    padding: 0.55rem 1rem;
    box-shadow: none !important;
    transition: color 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease;
}
.mode-toggle .btn:hover { color: var(--text); background: transparent; transform: none; }
.mode-toggle .btn.btn-primary {
    background: var(--surface);
    color: var(--accent);
    box-shadow: var(--shadow-sm) !important;
}

/* --------------------------------------------------- Folder / archive UI -- */

.folder-item, .archive-item {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.1rem;
    padding: 0.6rem 0.75rem;
    margin: 3px 0;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    color: var(--text);
    background: transparent;
    user-select: none;
    transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}
.folder-item span, .archive-item span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.folder-item:hover { background: var(--accent-soft); border-color: var(--accent-line); color: var(--text); }
.archive-item:hover { background: var(--success-soft); border-color: var(--success-line); color: var(--text); }

.folder-item.selected {
    background: var(--accent);
    color: var(--accent-contrast);
    border-color: var(--accent);
    box-shadow: 0 6px 16px -8px rgba(var(--accent-rgb), 0.7);
}
.archive-item.selected {
    background: var(--success);
    color: #fff;
    border-color: var(--success);
    box-shadow: 0 6px 16px -8px rgba(22, 163, 74, 0.6);
}
.folder-item.selected .bi, .archive-item.selected .bi { color: inherit !important; }

.folder-item .bi-folder, .folder-item .bi-folder-fill, .folder-item .bi-arrow-up { color: var(--accent); margin-right: 8px; }
.archive-item .bi-file-earmark-zip, .archive-item .bi-file-earmark-zip-fill { color: var(--warning); margin-right: 8px; }
.archive-item small { color: var(--text-faint); }
.archive-item.selected small { color: rgba(255, 255, 255, 0.8); }

#folder-browser, #archive-list, #modal-folder-browser, #modal-source-folder-browser {
    background: var(--surface-2);
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-sm) !important;
    padding: 0.5rem !important;
}

.navigate-btn {
    opacity: 0.55;
    border-radius: var(--radius-xs) !important;
    min-width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-strong);
    background: var(--surface);
    color: var(--text-muted);
    transition: all 0.15s ease;
}
.folder-item:hover .navigate-btn { opacity: 1; }
.navigate-btn:hover {
    background: var(--accent) !important;
    border-color: var(--accent) !important;
    color: #fff !important;
    transform: translateX(1px);
}

/* --------------------------------------------------------------- Forms -- */

.form-label { font-weight: 600; font-size: 0.9rem; color: var(--text); margin-bottom: 0.4rem; }
.form-text { color: var(--text-muted); font-size: 0.84rem; }

.form-control {
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 0.55rem 0.8rem;
    font-size: 0.95rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}
.form-control::placeholder { color: var(--text-faint); }
.form-control:focus {
    background: var(--surface);
    border-color: var(--accent);
    color: var(--text);
    box-shadow: var(--ring);
}
.form-control:disabled, .form-control[readonly] {
    background: var(--surface-2);
    border-color: var(--border);
    color: var(--text-muted);
}
textarea.form-control { font-family: var(--font-mono); font-size: 0.88rem; line-height: 1.5; }
input[type="number"].form-control { max-width: 220px; }

/* Monospace for path inputs */
#current-path, #current-path-retrieve, #selected-folder, #selected-archive,
#direct-path, #direct-path-retrieve, #modal-current-path, #modal-source-current-path,
#default-source, #default-destination {
    font-family: var(--font-mono);
    font-size: 0.86rem;
}

.input-group .form-control { border-right: 0; }
.input-group .btn {
    border: 1px solid var(--border-strong);
    border-left: 0;
    background: var(--surface-2);
    color: var(--text-muted);
}
.input-group .btn:hover { background: var(--surface-3); color: var(--text); }

.form-check-input { accent-color: var(--accent); border-color: var(--border-strong); cursor: pointer; }
.form-check-input:checked { background-color: var(--accent); border-color: var(--accent); }
.form-check-input:focus { border-color: var(--accent); box-shadow: var(--ring); }
.form-check-label { color: var(--text); cursor: pointer; }

/* -------------------------------------------------------------- Buttons -- */

.btn {
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.94rem;
    padding: 0.55rem 1.05rem;
    border: 1px solid transparent;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease, transform 0.06s ease;
}
.btn-lg { padding: 0.72rem 1.3rem; font-size: 1rem; border-radius: var(--radius-sm); }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.85rem; }
.btn:active { transform: translateY(0.5px); }

.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); box-shadow: 0 8px 18px -10px rgba(var(--accent-rgb), 0.65); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-contrast); }
.btn-primary:disabled, .btn-primary.disabled { background: var(--accent); border-color: var(--accent); opacity: 0.45; }

.btn-success { background: var(--success); border-color: var(--success); color: #fff; box-shadow: 0 8px 18px -10px rgba(22, 163, 74, 0.55); }
.btn-success:hover { background: var(--success-hover); border-color: var(--success-hover); color: #fff; }
.btn-success:disabled, .btn-success.disabled { opacity: 0.45; }

.btn-info { background: var(--surface); border-color: var(--border-strong); color: var(--text); box-shadow: var(--shadow-sm); }
.btn-info:hover { background: var(--surface-2); border-color: var(--border-strong); color: var(--text); }
.btn-info:disabled, .btn-info.disabled { opacity: 0.45; }

.btn-secondary { background: var(--surface-2); border-color: var(--border-strong); color: var(--text); }
.btn-secondary:hover { background: var(--surface-3); border-color: var(--border-strong); color: var(--text); }

.btn-outline-primary { background: transparent; border-color: var(--accent-line); color: var(--accent); }
.btn-outline-primary:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }

.btn-outline-secondary { background: transparent; border-color: var(--border-strong); color: var(--text-muted); }
.btn-outline-secondary:hover { background: var(--surface-2); border-color: var(--border-strong); color: var(--text); }

/* --------------------------------------------------------------- Modal -- */

.modal-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}
.modal-header { border-bottom: 1px solid var(--border); padding: 1.1rem 1.3rem; }
.modal-title { font-size: 1.05rem; display: flex; align-items: center; gap: 0.5rem; }
.modal-title i { color: var(--accent); }
.modal-body { padding: 1.3rem; }
.modal-footer { border-top: 1px solid var(--border); padding: 0.9rem 1.3rem; }
.btn-close { filter: var(--btn-close-filter, none); }
:root[data-theme="dark"] .btn-close { filter: invert(1) grayscale(1) brightness(1.6); }

/* ------------------------------------------------------------- Progress -- */

.progress {
    height: 0.7rem;
    background: var(--surface-3);
    border-radius: var(--radius-pill);
    overflow: hidden;
}
.progress-bar {
    background: linear-gradient(90deg, var(--accent), var(--accent-hover));
    border-radius: var(--radius-pill);
    transition: width 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.progress-bar.bg-success { background: linear-gradient(90deg, var(--success), var(--success-hover)) !important; }
.progress-bar.bg-danger { background: var(--danger) !important; }
.progress-message {
    margin: 0;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    word-break: break-all;
}

/* --------------------------------------------------------- Toasts/alerts -- */

.toast-stack {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    max-width: 420px;
}
.alert {
    border: 1px solid var(--border);
    border-left: 4px solid var(--text-faint);
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--shadow);
    border-radius: var(--radius-sm);
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
    line-height: 1.5;
    word-break: break-word;
    overflow-wrap: anywhere;
    white-space: pre-line;
}
.alert-success { border-left-color: var(--success); }
.alert-danger { border-left-color: var(--danger); }
.alert-warning { border-left-color: var(--warning); }
.alert-info { border-left-color: var(--info); }
.alert .file-path, .alert .file-path-long {
    font-family: var(--font-mono);
    background: var(--surface-2);
    padding: 4px 8px;
    border-radius: var(--radius-xs);
    font-size: 0.82em;
    display: block;
    margin: 5px 0;
    word-break: break-all;
    overflow-wrap: anywhere;
}
.alert code {
    font-family: var(--font-mono);
    background: var(--surface-2);
    padding: 1px 5px;
    border-radius: var(--radius-xs);
    font-size: 0.85em;
}
.alert .file-path-long { border-left: 3px solid var(--success); }

/* In-page (non-toast) info alerts, e.g. help + tips */
.app-main .alert {
    box-shadow: none;
    white-space: normal;
}
.alert-info:not(.toast-stack .alert-info) { background: var(--accent-soft); border-color: var(--accent-line); border-left-color: var(--accent); color: var(--text); }
.app-main .alert-success { background: var(--success-soft); border-color: var(--success-line); border-left-color: var(--success); color: var(--text); }

/* --------------------------------------------------------------- Tables -- */

.table { color: var(--text); margin: 0; }
.table > :not(caption) > * > * { background: transparent; border-color: var(--border); padding: 0.6rem 0.85rem; }
.table th { background: var(--surface-2); font-weight: 600; width: 34%; color: var(--text-muted); }
.table.table-bordered, .table-bordered > :not(caption) > * { border-color: var(--border); }
.table.table-bordered { border-radius: var(--radius-sm); overflow: hidden; }

/* ------------------------------------------------------------ Accordion -- */

.accordion { --bs-accordion-border-color: var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.accordion-item { background: var(--surface); border-color: var(--border); }
.accordion-button {
    background: var(--surface);
    color: var(--text);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    padding: 1rem 1.25rem;
    box-shadow: none;
}
.accordion-button i { color: var(--accent); }
.accordion-button:not(.collapsed) { background: var(--accent-soft); color: var(--accent); box-shadow: inset 0 -1px 0 var(--accent-line); }
.accordion-button:focus { box-shadow: var(--ring); border-color: var(--accent); }
.accordion-button::after { filter: var(--acc-arrow, none); }
:root[data-theme="dark"] .accordion-button::after { filter: invert(0.85); }
.accordion-body { background: var(--surface); color: var(--text); padding: 1.25rem; }

/* --------------------------------------------------------------- Badges -- */

.badge { font-weight: 600; padding: 0.4em 0.7em; border-radius: var(--radius-pill); font-size: 0.74rem; }
.badge.bg-secondary { background: var(--accent-soft) !important; color: var(--accent) !important; }

/* ----------------------------------------- Bootstrap utility re-theming -- */
/* Pages (esp. help.html) lean on these utilities; map them to tokens so the
   layout adapts cleanly in both light and dark. */

.text-dark { color: var(--text) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-primary { color: var(--accent) !important; }
.text-success { color: var(--success) !important; }
.text-light { color: #fff !important; }
.bg-dark { background: var(--surface-3) !important; color: var(--text) !important; border-radius: var(--radius-xs); }
.bg-dark.text-light { color: var(--text) !important; }

.border-primary { border-color: var(--accent-line) !important; }
.border-success { border-color: var(--success-line) !important; }
.border-warning { border-color: rgba(217, 119, 6, 0.4) !important; }
.border-info { border-color: rgba(14, 165, 233, 0.4) !important; }
.bg-primary.bg-opacity-10 { background: var(--accent-soft) !important; }
.bg-success.bg-opacity-10 { background: var(--success-soft) !important; }
.bg-warning.bg-opacity-10 { background: rgba(217, 119, 6, 0.12) !important; }

hr { border-color: var(--border); opacity: 1; }

.spinner-border { color: var(--accent); width: 1.8rem; height: 1.8rem; border-width: 0.2em; }

.tooltip { font-family: var(--font-sans); font-size: 0.82rem; }
.tooltip .tooltip-inner {
    background: var(--text);
    color: var(--bg);
    border-radius: var(--radius-xs);
    padding: 6px 10px;
    max-width: 280px;
    text-align: left;
    box-shadow: var(--shadow);
}
.tooltip .tooltip-arrow::before { border-top-color: var(--text); border-bottom-color: var(--text); }

.bi-info-circle { cursor: help; opacity: 0.65; transition: opacity 0.15s ease; }
.bi-info-circle:hover { opacity: 1; }

/* --------------------------------------------------------- Entrance fx -- */

@media (prefers-reduced-motion: no-preference) {
    .card, .mode-header {
        animation: rise 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
    }
    @keyframes rise {
        from { opacity: 0; transform: translateY(8px); }
        to { opacity: 1; transform: none; }
    }

    /* Smooth cross-fade when the theme is switched. The class is added by JS
       only for the duration of the toggle, so normal hover/focus transitions
       and the initial page load are unaffected. */
    :root.theme-transition,
    :root.theme-transition * {
        transition: background-color 0.35s ease, border-color 0.35s ease,
                    color 0.35s ease, box-shadow 0.35s ease, fill 0.35s ease !important;
    }
}

/* ----------------------------------------------------------- Responsive -- */

@media (max-width: 768px) {
    .app-main { padding: 1.6rem 0 2.2rem; }
    .card-body { padding: 1.1rem; }
    .mode-header { padding: 1.25rem 1.3rem; }
    .mode-header h2 { font-size: 1.25rem; }
}

/* ----------------------------------------------------------- Cloud mode -- */

/* Login */
.login-wrap { display: flex; justify-content: center; padding-top: 4vh; }
.login-card { width: 100%; max-width: 400px; }
.login-head { text-align: center; margin-bottom: 1.25rem; }
.login-head .app-brand__mark { width: 48px; height: 48px; font-size: 1.4rem; margin: 0 auto 0.75rem; }
.login-head h1 { font-size: 1.4rem; margin: 0; }
.login-head p { margin: 0.25rem 0 0; }

/* Upload drop zones */
.dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    width: 100%;
    min-height: 180px;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    border: 1.5px dashed var(--border-strong);
    border-radius: var(--radius);
    background: var(--surface-2);
    color: var(--text-muted);
    transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}
.dropzone:hover, .dropzone:focus-within {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--text);
}
.dropzone__icon { font-size: 2rem; color: var(--accent); }
.dropzone__title { font-weight: 600; color: var(--text); }
.dropzone__hint { font-size: 0.85rem; }
.dropzone code {
    font-family: var(--font-mono);
    background: var(--surface-3);
    padding: 1px 5px;
    border-radius: var(--radius-xs);
    font-size: 0.85em;
}

.upload-summary { margin-top: 0.9rem; }
.upload-summary__name {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    word-break: break-all;
}
.upload-summary__name .bi { color: var(--accent); }
.upload-summary__meta { color: var(--text-muted); font-size: 0.88rem; font-family: var(--font-mono); }
.upload-warn {
    margin-top: 0.5rem;
    color: var(--warning);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Working overlay */
.cloud-overlay {
    position: fixed;
    inset: 0;
    z-index: 1090;
    display: flex;
    align-items: center;
    justify-content: center;
    background: color-mix(in srgb, var(--bg) 72%, transparent);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.cloud-overlay[hidden] { display: none; }
.cloud-overlay__box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem 2.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}
.cloud-overlay__box .spinner-border { width: 2.4rem; height: 2.4rem; }
.cloud-overlay__msg { margin: 0; font-weight: 500; color: var(--text); }
