/* ============================================================
   Init Local Uploader — theme
   ============================================================ */

:root {
    --iu-accent: #4f46e5;
    --iu-accent-hover: #4338ca;
    --iu-accent-soft: #eef2ff;
    --iu-bg: #f6f7fb;
    --iu-surface: #ffffff;
    --iu-border: #e5e7eb;
    --iu-text: #1f2430;
    --iu-text-muted: #6b7280;
    --iu-danger: #dc2626;
    --iu-danger-soft: #fef2f2;
    --iu-success: #16a34a;
    --iu-success-soft: #f0fdf4;
    --iu-radius: 14px;
    --iu-radius-sm: 9px;
    --iu-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 24px rgba(16, 24, 40, 0.06);
    --iu-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--iu-font);
    background: var(--iu-bg);
    color: var(--iu-text);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

/* ---------- Shell / layout ---------- */
.iu-shell { display: flex; flex-direction: column; min-height: 100vh; }

.iu-topbar {
    background: var(--iu-surface);
    border-bottom: 1px solid var(--iu-border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.iu-topbar-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 24px;
}
.iu-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.iu-brand-mark {
    width: 32px; height: 32px;
    background: var(--iu-accent);
    color: #fff;
    border-radius: 9px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 13px;
}
.iu-brand-text { font-weight: 600; font-size: 15px; color: var(--iu-text); }
.iu-nav { display: flex; gap: 4px; flex: 1; }
.iu-nav-link {
    text-decoration: none;
    padding: 8px 14px;
    border-radius: var(--iu-radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--iu-text-muted);
}
.iu-nav-link:hover { background: var(--iu-bg); color: var(--iu-text); }
.iu-nav-link.is-active { background: var(--iu-accent-soft); color: var(--iu-accent); }
.iu-logout {
    text-decoration: none;
    font-size: 13px;
    color: var(--iu-text-muted);
    padding: 8px 12px;
    border-radius: var(--iu-radius-sm);
}
.iu-logout:hover { background: var(--iu-danger-soft); color: var(--iu-danger); }

.iu-lang-toggle {
    display: flex;
    align-items: center;
    border: 1px solid var(--iu-border);
    border-radius: var(--iu-radius-sm);
    overflow: hidden;
}
.iu-lang-link {
    text-decoration: none;
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--iu-text-muted);
    padding: 6px 10px;
}
.iu-lang-link:hover { background: var(--iu-bg); }
.iu-lang-link.is-active { background: var(--iu-accent); color: #fff; }
.iu-lang-toggle-floating {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--iu-surface);
}

.iu-main { max-width: 960px; margin: 0 auto; padding: 32px 20px 60px; width: 100%; flex: 1; }

.iu-footer {
    text-align: center;
    font-size: 12px;
    color: var(--iu-text-muted);
    padding: 20px;
}
.iu-footer a { color: var(--iu-text-muted); }

.iu-page-head { margin-bottom: 20px; }
.iu-page-head h1 { font-size: 22px; font-weight: 700; margin-bottom: 4px; }
.iu-page-sub { color: var(--iu-text-muted); font-size: 14px; }

.iu-card {
    background: var(--iu-surface);
    border: 1px solid var(--iu-border);
    border-radius: var(--iu-radius);
    box-shadow: var(--iu-shadow);
    padding: 24px;
    margin-bottom: 20px;
}
.iu-empty { text-align: center; color: var(--iu-text-muted); padding: 48px 24px; }

/* ---------- Alerts ---------- */
.iu-alert {
    padding: 12px 16px;
    border-radius: var(--iu-radius-sm);
    font-size: 14px;
    margin-bottom: 18px;
}
.iu-alert-error { background: var(--iu-danger-soft); color: var(--iu-danger); border: 1px solid #fecaca; }
.iu-alert-success { background: var(--iu-success-soft); color: var(--iu-success); border: 1px solid #bbf7d0; }
.iu-alert-warning { background: #fffbeb; color: #b45309; border: 1px solid #fde68a; }

/* ---------- Forms ---------- */
.iu-field { margin-bottom: 18px; }
.iu-field label { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 600; color: var(--iu-text); }
.iu-hint { font-size: 12px; color: var(--iu-text-muted); margin-top: 6px; }

input[type="text"],
input[type="number"],
input[type="password"],
input[type="search"],
select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--iu-border);
    border-radius: var(--iu-radius-sm);
    font-size: 14px;
    background: var(--iu-surface);
    color: var(--iu-text);
    transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus {
    outline: none;
    border-color: var(--iu-accent);
    box-shadow: 0 0 0 3px var(--iu-accent-soft);
}

.iu-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.iu-checkbox {
    display: flex; align-items: center; gap: 8px;
    font-size: 14px; cursor: pointer;
    margin-bottom: 20px;
}
.iu-checkbox input { width: auto; cursor: pointer; }

/* ---------- Buttons ---------- */
.iu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: var(--iu-radius-sm);
    font-size: 14px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.1s, background 0.15s, opacity 0.15s;
}
.iu-btn:active { transform: translateY(1px); }
.iu-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.iu-btn-primary { background: var(--iu-accent); color: #fff; }
.iu-btn-primary:hover:not(:disabled) { background: var(--iu-accent-hover); }
.iu-btn-ghost { background: var(--iu-surface); color: var(--iu-text); border-color: var(--iu-border); }
.iu-btn-ghost:hover:not(:disabled) { background: var(--iu-bg); }
.iu-btn-block { width: 100%; }
.iu-btn-danger { color: var(--iu-danger); border-color: #fecaca; }
.iu-btn-danger:hover:not(:disabled) { background: var(--iu-danger-soft); }
.iu-hidden-form { display: none; }

.iu-icon-btn {
    width: 30px; height: 30px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 8px;
    border: 1px solid var(--iu-border);
    background: var(--iu-surface);
    color: var(--iu-text-muted);
    cursor: pointer;
}
.iu-icon-btn:hover { background: var(--iu-bg); color: var(--iu-text); }
.iu-icon-btn-danger:hover { background: var(--iu-danger-soft); color: var(--iu-danger); border-color: #fecaca; }

/* ---------- Dropzone ---------- */
.iu-dropzone {
    position: relative;
    border: 2px dashed var(--iu-border);
    border-radius: var(--iu-radius);
    padding: 32px 20px;
    text-align: center;
    color: var(--iu-text-muted);
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}
.iu-dropzone:hover, .iu-dropzone:focus, .iu-dropzone.is-dragover {
    border-color: var(--iu-accent);
    background: var(--iu-accent-soft);
}
.iu-dropzone input[type="file"] {
    position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%;
}
.iu-dropzone-content svg { margin: 0 auto 10px; color: var(--iu-accent); }
.iu-dropzone-content p { font-size: 14px; margin-bottom: 4px; }

.iu-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
    gap: 10px;
    margin-top: 14px;
}
.iu-preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--iu-border);
}
.iu-preview-item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.iu-preview-remove {
    position: absolute; top: 4px; right: 4px;
    width: 20px; height: 20px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 12px;
    line-height: 1;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
}

/* ---------- Progress ---------- */
.iu-progress {
    height: 6px;
    background: var(--iu-border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 16px;
}
.iu-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--iu-accent);
    transition: width 0.15s ease;
}

/* ---------- Output ---------- */
.iu-output { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--iu-border); }
.iu-output h3 { font-size: 14px; margin-bottom: 10px; }
.iu-output textarea {
    width: 100%; min-height: 130px;
    padding: 14px;
    border: 1px solid var(--iu-border);
    border-radius: var(--iu-radius-sm);
    font-family: "SFMono-Regular", Consolas, Menlo, monospace;
    font-size: 12.5px;
    resize: vertical;
    background: var(--iu-bg);
    color: var(--iu-text);
}
.iu-output-actions { display: flex; gap: 10px; margin-top: 10px; }
.iu-hidden-textarea { position: absolute; left: -9999px; }

/* ---------- Filter bar (history) ---------- */
.iu-filter-bar { display: flex; gap: 10px; flex-wrap: wrap; }
.iu-filter-bar input[type="search"] { flex: 2; min-width: 200px; }
.iu-filter-bar select { flex: 1; min-width: 140px; }

/* ---------- Selection bar ---------- */
.iu-selection-bar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 16px;
}
.iu-selection-bar .iu-checkbox { margin-bottom: 0; }
.iu-selection-actions { display: flex; gap: 10px; }

/* ---------- Gallery ---------- */
.iu-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
}
.iu-gallery-item {
    position: relative;
    border: 1px solid var(--iu-border);
    border-radius: var(--iu-radius-sm);
    overflow: hidden;
    background: var(--iu-bg);
}
.iu-gallery-thumb { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; background: #eee; }
.iu-gallery-select { position: absolute; top: 8px; left: 8px; z-index: 2; }
.iu-gallery-select input {
    width: 18px; height: 18px; cursor: pointer;
    accent-color: var(--iu-accent);
}
.iu-gallery-meta { padding: 10px 12px; }
.iu-gallery-name { font-size: 12.5px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.iu-gallery-sub { font-size: 11.5px; color: var(--iu-text-muted); margin-top: 2px; }
.iu-gallery-actions {
    position: absolute; top: 8px; right: 8px;
    display: flex; gap: 6px;
    z-index: 2;
}
.iu-delete-form { display: inline; }

/* ---------- Pagination ---------- */
.iu-pagination { display: flex; gap: 6px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }
.iu-page-link {
    width: 34px; height: 34px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 8px;
    text-decoration: none;
    font-size: 13px;
    color: var(--iu-text-muted);
    border: 1px solid var(--iu-border);
}
.iu-page-link:hover { background: var(--iu-bg); }
.iu-page-link.is-active { background: var(--iu-accent); border-color: var(--iu-accent); color: #fff; }

/* ---------- Login ---------- */
.iu-login-body {
    min-height: 100vh;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    background: radial-gradient(circle at top, #eef2ff, var(--iu-bg) 60%);
    padding: 20px;
}
.iu-login-box {
    background: var(--iu-surface);
    border: 1px solid var(--iu-border);
    border-radius: var(--iu-radius);
    box-shadow: var(--iu-shadow);
    padding: 36px 32px;
    width: 100%;
    max-width: 360px;
    text-align: center;
}
.iu-login-mark {
    width: 44px; height: 44px;
    background: var(--iu-accent);
    color: #fff;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 15px;
    margin: 0 auto 16px;
}
.iu-login-box h1 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.iu-login-sub { font-size: 13px; color: var(--iu-text-muted); margin-bottom: 22px; }
.iu-login-form { text-align: left; }
.iu-login-footer { margin-top: 24px; font-size: 12px; color: var(--iu-text-muted); }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
    .iu-row { grid-template-columns: 1fr; }
    .iu-topbar-inner { flex-wrap: wrap; }
    .iu-nav { order: 3; width: 100%; }
}