/* =========================================
   DESIGN TOKENS & THEME VARIABLES
   Default: LIGHT (Cloudy gradient)
   Dark overrides in body.theme-dark
========================================= */

:root {
    --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
        sans-serif;

    /* Light theme defaults */
    --bg-body: #e5edff;
    --bg-shell: transparent;
    --bg-card: #ffffff;
    --bg-card-soft: #f3f4ff;
    --bg-elevated: #ffffff;

    --accent: #2563eb;
    --accent-strong: #1d4ed8;
    --accent-soft: rgba(37, 99, 235, 0.12);
    --accent-alt: #22c55e;

    --border-subtle: rgba(148, 163, 184, 0.5);
    --border-strong: rgba(148, 163, 184, 0.8);

    --text-main: #111827;
    --text-muted: #6b7280;
    --text-soft: #9ca3af;
    --text-strong: #0f172a;

    --danger: #b91c1c;

    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-pill: 999px;

    --shadow-soft: 0 16px 40px rgba(15, 23, 42, 0.12);
    --shadow-subtle: 0 10px 30px rgba(148, 163, 184, 0.45);
}

/* Dark theme overrides */
body.theme-dark {
    --bg-body: #050816;
    --bg-shell: #050816;
    --bg-card: #0b1020;
    --bg-card-soft: #111827;
    --bg-elevated: #0f172a;

    --accent: #6366f1;
    --accent-strong: #4f46e5;
    --accent-soft: rgba(99, 102, 241, 0.16);
    --accent-alt: #22c55e;

    --border-subtle: rgba(148, 163, 184, 0.25);
    --border-strong: rgba(148, 163, 184, 0.6);

    --text-main: #e5e7eb;
    --text-muted: #9ca3af;
    --text-soft: #6b7280;
    --text-strong: #f9fafb;

    --danger: #f97373;

    --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.6);
    --shadow-subtle: 0 10px 30px rgba(15, 23, 42, 0.7);
}

/* =========================================
   GLOBAL RESET & BODY
========================================= */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    height: 100%;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-body);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: stretch;
}

/* =========================================
   BACKGROUND GRADIENT
========================================= */

.app-background {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

/* Light "cloudy" gradient */
body.theme-light .app-background {
    background:
        radial-gradient(circle at top left, rgba(191, 219, 254, 0.9), transparent 55%),
        radial-gradient(circle at bottom right, rgba(165, 243, 252, 0.8), transparent 55%);
}

/* Dark gradient */
body.theme-dark .app-background {
    background:
        radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 55%),
        radial-gradient(circle at bottom right, rgba(129, 140, 248, 0.2), transparent 55%);
}

/* =========================================
   APP SHELL & HEADER
========================================= */

.app-shell {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1280px;
    margin: 24px auto;
    padding: 12px 16px 32px;
}

/* Top header / nav */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    background: linear-gradient(
        120deg,
        rgba(255, 255, 255, 0.9),
        rgba(239, 246, 255, 0.96)
    );
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-subtle);
    backdrop-filter: blur(20px);
    margin-bottom: 18px;
}

body.theme-dark .app-header {
    background: linear-gradient(
        120deg,
        rgba(15, 23, 42, 0.96),
        rgba(17, 24, 39, 0.98)
    );
}

.app-title {
    display: flex;
    align-items: center;
    gap: 12px;
}

.app-logo-circle {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 20%, #4ade80, #22c55e);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: #022c22;
    box-shadow: 0 10px 25px rgba(34, 197, 94, 0.4);
}

.app-title h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-strong);
}

.app-title p {
    margin-top: 2px;
    font-size: 12px;
    color: var(--text-muted);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Status badge (JS toggles status-online/offline) */
.status-wrapper {
    display: flex;
    align-items: center;
}

.status-badge {
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
}

body.theme-dark .status-badge {
    background: rgba(15, 23, 42, 0.9);
}

.status-online {
    background: rgba(22, 163, 74, 0.18);
    border-color: rgba(34, 197, 94, 0.7);
    color: #166534;
}

body.theme-dark .status-online {
    color: #bbf7d0;
}

.status-offline {
    background: rgba(248, 113, 113, 0.18);
    border-color: rgba(248, 113, 113, 0.7);
    color: #b91c1c;
}

body.theme-dark .status-offline {
    color: #fecaca;
}

/* Theme toggle button */
.theme-toggle-btn {
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 8px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    font-size: 14px;
    box-shadow: 0 6px 16px rgba(148, 163, 184, 0.4);
    transition:
        background 0.15s ease,
        transform 0.08s ease,
        box-shadow 0.15s ease,
        border-color 0.15s ease;
}

body.theme-dark .theme-toggle-btn {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.8);
}

.theme-toggle-btn:hover {
    transform: translateY(-1px);
    border-color: var(--accent);
}

/* Icon visibility based on data-theme */
.theme-toggle-btn .icon-sun,
.theme-toggle-btn .icon-moon {
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.theme-toggle-btn[data-theme="light"] .icon-sun {
    opacity: 1;
}

.theme-toggle-btn[data-theme="light"] .icon-moon {
    opacity: 0.4;
}

.theme-toggle-btn[data-theme="dark"] .icon-sun {
    opacity: 0.4;
}

.theme-toggle-btn[data-theme="dark"] .icon-moon {
    opacity: 1;
}

/* =========================================
   MAIN LAYOUT
========================================= */

.app-main {
    margin-top: 10px;
}

.layout-grid {
    display: grid;
    grid-template-columns: minmax(0, 2.3fr) minmax(260px, 1fr);
    gap: 18px;
}

.primary-column,
.side-column {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Card container */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
    padding: 16px 16px 18px;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    inset: -40%;
    background:
        radial-gradient(circle at top, rgba(191, 219, 254, 0.7), transparent 60%),
        radial-gradient(circle at bottom, rgba(167, 243, 208, 0.6), transparent 60%);
    opacity: 0.35;
    pointer-events: none;
    z-index: -1;
}

body.theme-dark .card::before {
    background:
        radial-gradient(circle at top, rgba(99, 102, 241, 0.14), transparent 55%),
        radial-gradient(circle at bottom, rgba(56, 189, 248, 0.12), transparent 55%);
}

/* Card header text */
.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
}

.card-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-strong);
}

.card-header p {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 3px;
}

/* =========================================
   UPLOAD SECTION
========================================= */

.upload-section {
    /* uses .card */
}

.drop-zone {
    margin-top: 4px;
    border-radius: var(--radius-lg);
    border: 1.5px dashed var(--border-subtle);
    background: linear-gradient(
        145deg,
        rgba(255, 255, 255, 0.85),
        rgba(239, 246, 255, 0.9)
    );
    padding: 26px 18px;
    text-align: center;
    cursor: pointer;
    transition:
        border-color 0.15s ease,
        box-shadow 0.15s ease,
        transform 0.1s ease,
        background 0.15s ease;
}

body.theme-dark .drop-zone {
    background: linear-gradient(
        145deg,
        rgba(15, 23, 42, 0.9),
        rgba(15, 23, 42, 1)
    );
}

.drop-zone-inner {
    max-width: 360px;
    margin: 0 auto;
}

.upload-icon {
    font-size: 28px;
    margin-bottom: 6px;
}

.drop-zone-inner h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-strong);
}

.drop-zone-inner p {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.drop-zone:hover {
    border-color: var(--accent);
    box-shadow: 0 16px 40px rgba(37, 99, 235, 0.25);
    transform: translateY(-1px);
}

/* JS adds this while dragging files over */
.drop-zone-hover {
    border-color: var(--accent-alt) !important;
    box-shadow: 0 18px 45px rgba(34, 197, 94, 0.4);
}

/* =========================================
   BUTTONS
========================================= */

.btn {
    font-family: inherit;
    font-size: 12px;
    border-radius: var(--radius-pill);
    border: none;
    padding: 7px 16px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition:
        background 0.15s ease,
        box-shadow 0.15s ease,
        transform 0.08s ease,
        color 0.15s ease,
        border-color 0.15s ease;
}

/* Main call-to-action */
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #f9fafb;
    box-shadow: 0 12px 25px rgba(37, 99, 235, 0.35);
    border: 1px solid rgba(191, 219, 254, 0.6);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 16px 32px rgba(37, 99, 235, 0.45);
}

/* Ghost / secondary button */
.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-subtle);
}

.btn-ghost:disabled {
    opacity: 0.4;
    cursor: default;
}

/* Small buttons used in table (Download/Delete) */
.btn-small {
    background: rgba(255, 255, 255, 0.9);
    color: var(--accent-strong);
    border-radius: var(--radius-pill);
    padding: 5px 12px;
    font-size: 11px;
    border: 1px solid rgba(191, 219, 254, 0.8);
}

body.theme-dark .btn-small {
    background: rgba(15, 23, 42, 0.8);
    color: #a5b4fc;
    border-color: rgba(129, 140, 248, 0.6);
}

.btn-small:hover {
    background: var(--accent-soft);
}

/* Red "danger" button (JS uses class btn-danger) */
.btn-danger {
    background: rgba(248, 113, 113, 0.08);
    color: #b91c1c;
    border-radius: var(--radius-pill);
    padding: 5px 11px;
    font-size: 11px;
    border: 1px solid rgba(248, 113, 113, 0.7);
    margin-left: 6px;
}

body.theme-dark .btn-danger {
    color: #fecaca;
}

.btn-danger:hover {
    background: rgba(248, 113, 113, 0.18);
}

/* Full-width button */
.btn-full {
    width: 100%;
}

/* =========================================
   BROWSER CONTROLS
========================================= */

.browser-section {
    /* styled as .card */
}

.breadcrumb-block {
    display: flex;
    align-items: center;
    gap: 10px;
}

.breadcrumb-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
}

/* Search + sort */
.search-sort-block {
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-wrapper {
    position: relative;
    min-width: 210px;
}

.input-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
    color: var(--text-soft);
}

.search-input {
    width: 100%;
    padding: 7px 10px 7px 26px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card-soft);
    color: var(--text-main);
    font-size: 12px;
}

.search-input::placeholder {
    color: var(--text-soft);
}

/* Sort dropdown */
.sort-select {
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card-soft);
    color: var(--text-main);
    padding: 7px 12px;
    font-size: 12px;
}

.browser-body {
    margin-top: 12px;
}

/* =========================================
   FOLDER GRID
========================================= */

.folder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 10px;
}

/* Folder cards created by JS */
.folder-card {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    border-radius: 14px;
    border: 1px solid rgba(209, 213, 219, 0.9);
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 1),
        rgba(239, 246, 255, 0.98)
    );
    padding: 9px 11px;
    box-shadow: 0 10px 22px rgba(148, 163, 184, 0.35);
    cursor: pointer;
    text-align: left;
    transition:
        transform 0.08s ease,
        box-shadow 0.12s ease,
        border-color 0.12s ease,
        background 0.12s ease;
}

body.theme-dark .folder-card {
    border-color: rgba(55, 65, 81, 0.9);
    background: linear-gradient(
        140deg,
        rgba(15, 23, 42, 0.96),
        rgba(30, 64, 175, 0.65)
    );
    box-shadow: 0 10px 22px rgba(15, 23, 42, 0.8);
}

.folder-card:hover {
    transform: translateY(-1px);
    box-shadow: 0 16px 34px rgba(37, 99, 235, 0.45);
    border-color: var(--accent);
}

.folder-icon {
    font-size: 20px;
}

.folder-info {
    display: flex;
    flex-direction: column;
}

.folder-name {
    font-weight: 600;
    font-size: 13px;
    color: var(--text-strong);
    margin-bottom: 2px;
}

.folder-meta {
    font-size: 11px;
    color: var(--text-muted);
}

.folder-meta span + span::before {
    content: "•";
    margin: 0 4px;
}

/* =========================================
   FILE TABLE
========================================= */

.table-wrapper {
    border-radius: 14px;
    border: 1px solid rgba(209, 213, 219, 0.9);
    overflow: hidden;
    background: var(--bg-elevated);
    box-shadow: 0 12px 26px rgba(148, 163, 184, 0.4);
}

body.theme-dark .table-wrapper {
    border-color: rgba(55, 65, 81, 0.9);
    box-shadow: 0 12px 26px rgba(15, 23, 42, 0.9);
}

.file-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

.file-table thead {
    background: var(--bg-card-soft);
}

body.theme-dark .file-table thead {
    background: rgba(15, 23, 42, 0.98);
}

.file-table th,
.file-table td {
    padding: 8px 10px;
    text-align: left;
    border-bottom: 1px solid rgba(229, 231, 235, 0.9);
}

body.theme-dark .file-table th,
body.theme-dark .file-table td {
    border-bottom: 1px solid rgba(31, 41, 55, 0.95);
}

.file-table th {
    font-weight: 600;
    color: var(--text-muted);
}

.file-table td {
    color: var(--text-main);
}

/* Row hover */
.file-table tbody tr:hover {
    background: rgba(219, 234, 254, 0.8);
}

body.theme-dark .file-table tbody tr:hover {
    background: rgba(30, 64, 175, 0.4);
}

.file-table .col-name {
    font-weight: 500;
}

/* Empty rows for JS */
.empty-row td {
    text-align: center;
    color: var(--text-muted);
}

/* General empty-state box (used for no folders) */
.empty-state {
    padding: 20px 14px;
    border-radius: 14px;
    border: 1px dashed var(--border-subtle);
    background: var(--bg-card-soft);
    color: var(--text-muted);
    font-size: 12px;
    text-align: center;
}

/* =========================================
   RULES SIDEBAR
========================================= */

.rules-section {
    /* uses .card */
}

.rules-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 8px;
    margin-bottom: 12px;
}

/* Input + label */
.field-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.field-group label {
    font-size: 11px;
    color: var(--text-muted);
}

.field-group input {
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card-soft);
    color: var(--text-main);
    padding: 7px 10px;
    font-size: 12px;
}

.rules-list-header {
    margin-top: 2px;
    margin-bottom: 4px;
    font-size: 11px;
    color: var(--text-muted);
}

.rules-list {
    font-size: 12px;
    color: var(--text-main);
    max-height: 220px;
    overflow-y: auto;
    padding-right: 4px;
}

/* Each rule row (added by JS as .rule-row) */
.rule-row + .rule-row {
    margin-top: 3px;
}

.rules-hint {
    margin-top: 10px;
    font-size: 11px;
    color: var(--text-soft);
}

/* Code snippet style */
code {
    font-family: "JetBrains Mono", Menlo, Consolas, monospace;
    background: var(--bg-card-soft);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 11px;
}

/* =========================================
   UTILITIES & RESPONSIVE
========================================= */

.hidden {
    display: none;
}

@media (max-width: 900px) {
    .layout-grid {
        grid-template-columns: 1fr;
    }

    .search-sort-block {
        flex-wrap: wrap;
        justify-content: flex-start;
    }
}

@media (max-width: 640px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .card {
        padding: 14px 12px 16px;
    }
}

/* Preview modal styles */
.modal.hidden { display: none; }
.modal { position: fixed; inset: 0; z-index: 60; display: block; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(2,6,23,0.6); backdrop-filter: blur(4px); }
.modal-content { position: relative; max-width: 980px; margin: 6vh auto; background: var(--bg-card); border-radius: 12px; padding: 14px; box-shadow: var(--shadow-soft); z-index: 61; overflow: hidden; }
.modal-close { position: absolute; right: 8px; top: 8px; background: transparent; border: none; font-size: 20px; cursor: pointer; color: var(--text-muted); }
.preview-body { max-height: 80vh; overflow: auto; padding: 8px; }
.preview-body img { display:block; margin: 0 auto; }
.markdown-preview { padding: 8px 12px; }

/* Thumbnail styles */
.folder-thumb { width: 84px; height: 64px; object-fit: cover; border-radius: 8px; display: block; }
.file-thumb { width: 48px; height: 36px; object-fit: cover; border-radius: 6px; margin-right: 8px; vertical-align: middle; }
.file-cell { display:flex; align-items:center; gap:8px; }
.file-name { display:inline-block; max-width: 320px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-icon { width:48px; height:36px; display:inline-flex; align-items:center; justify-content:center; background:var(--bg-card-soft); border-radius:6px; color:var(--text-muted); }