:root {
    --bg: #f6f8fc;
    --card: #ffffff;
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --text: #202124;
    --muted: #5f6368;
    --border: #e0e3e7;
    --danger: #d93025;
    --ok: #188038;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(60,64,67,.15);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, "Noto Sans Arabic", sans-serif;
    background: var(--bg);
    color: var(--text);
}

.muted { color: var(--muted); }
.err { color: var(--danger); background: #fce8e6; padding: 10px 14px; border-radius: 8px; }
.ok  { color: var(--ok); background: #e6f4ea; padding: 10px 14px; border-radius: 8px; }

/* ===== صفحات المصادقة ===== */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.auth-card {
    background: var(--card);
    padding: 36px 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 380px;
}
.auth-card h1 { margin: 0 0 4px; font-size: 24px; }
.auth-card label { display: block; margin: 16px 0 6px; font-size: 14px; font-weight: 600; }
.auth-card input[type=text],
.auth-card input[type=password] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
}
.auth-card input:focus { outline: 2px solid var(--primary); border-color: transparent; }
.auth-card button { margin-top: 22px; width: 100%; }

/* ===== شريط علوي ===== */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--card);
    padding: 14px 24px;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 10;
}
.brand { font-size: 20px; font-weight: 700; }
.user { display: flex; align-items: center; gap: 14px; }

/* ===== أزرار ===== */
button, .ghost {
    cursor: pointer;
    font-size: 14px;
    font-family: inherit;
    border-radius: 8px;
    padding: 10px 16px;
    border: 1px solid transparent;
}
button.primary, .primary {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
}
button.primary:hover { background: var(--primary-dark); }
.ghost {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
}
.ghost:hover { background: #f1f3f4; }
.danger { background: transparent; color: var(--danger); border: 1px solid #f3c1bd; }
.danger:hover { background: #fce8e6; }
.inline { display: inline; margin: 0; }

/* ===== المحتوى ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 24px; }
.toolbar { display: flex; align-items: center; gap: 16px; margin-bottom: 18px; flex-wrap: wrap; }
.toolbar h2 { margin: 0; }

/* ===== شريط البحث ===== */
.searchbar {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px 16px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    transition: box-shadow .15s, border-color .15s;
}
.searchbar:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,115,232,.15);
}
.search-icon { font-size: 15px; opacity: .7; }
.search {
    flex: 1;
    min-width: 0;
    padding: 8px 4px;
    border: none;
    outline: none;
    background: transparent;
    font-size: 15px;
    font-family: inherit;
    color: var(--text);
}
.search::-webkit-search-cancel-button { display: none; }
.search-clear {
    border: none;
    background: #eceff1;
    color: var(--muted);
    width: 24px;
    height: 24px;
    padding: 0;
    border-radius: 50%;
    font-size: 12px;
    line-height: 1;
    cursor: pointer;
}
.search-clear:hover { background: #dfe3e6; color: var(--text); }
.search-count { font-size: 13px; white-space: nowrap; }

/* ===== Filter / selection bar ===== */
.filterbar {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
    flex-wrap: wrap;
}
.filterbar .spacer { flex: 1; }
.selectall {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    cursor: pointer;
    user-select: none;
}
.selectall input { width: 16px; height: 16px; cursor: pointer; }
.type-filter {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
}
.type-filter:focus { outline: 2px solid var(--primary); border-color: transparent; }
#bulkDelete { font-weight: 600; }

/* checkbox on each card */
.card { position: relative; }
.card-check {
    position: absolute;
    top: 8px;
    left: 8px;
    z-index: 2;
    background: rgba(255,255,255,.85);
    border-radius: 6px;
    padding: 3px;
    line-height: 0;
    box-shadow: 0 1px 2px rgba(0,0,0,.15);
}
.card-check input { width: 17px; height: 17px; cursor: pointer; margin: 0; }
.card.selected { outline: 2px solid var(--primary); outline-offset: -2px; }
.card.selected .thumb { filter: brightness(.97); }

.dropzone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 28px;
    text-align: center;
    color: var(--muted);
    margin-bottom: 20px;
    transition: .15s;
}
.dropzone.drag { border-color: var(--primary); background: #e8f0fe; color: var(--primary-dark); }

.empty {
    text-align: center;
    color: var(--muted);
    padding: 50px;
}

/* ===== شبكة الملفات ===== */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: .15s;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.thumb {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 120px;
    background: linear-gradient(135deg, #fbe9e7, #fff3e0);
    text-decoration: none;
}
.pdf-icon {
    background: var(--danger);
    color: #fff;
    font-weight: 700;
    font-size: 13px;
    padding: 8px 12px;
    border-radius: 6px;
    letter-spacing: 1px;
}
/* ألوان الشارة حسب نوع الملف */
.pdf-icon.t-pdf  { background: #d93025; }
.pdf-icon.t-img  { background: #188038; }
.pdf-icon.t-vid  { background: #8e24aa; }
.pdf-icon.t-epub { background: #e8710a; }
.pdf-icon.t-zip  { background: #5f6368; }
.pdf-icon.t-file { background: #455a64; }
.thumb.t-img  { background: linear-gradient(135deg, #e8f5e9, #f1f8e9); }
.thumb.t-vid  { background: linear-gradient(135deg, #f3e5f5, #ede7f6); }
.thumb.t-epub { background: linear-gradient(135deg, #fff3e0, #fff8e1); }
.thumb.t-zip  { background: linear-gradient(135deg, #eceff1, #f5f5f5); }
.thumb.t-file { background: linear-gradient(135deg, #eceff1, #f5f5f5); }

button:disabled { opacity: .6; cursor: default; }
.actions .share-btn { white-space: nowrap; }
.meta { padding: 12px 14px 6px; }
.name {
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sub { font-size: 12px; margin-top: 4px; }
.actions {
    display: flex;
    gap: 8px;
    padding: 8px 14px 14px;
    justify-content: space-between;
}
.actions .ghost, .actions .danger { padding: 7px 12px; font-size: 13px; }

/* ===== قائمة الرفع ===== */
.upload-list { margin-bottom: 18px; }
.upload-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 8px;
    font-size: 14px;
}
.upload-item .bar {
    flex: 1;
    height: 6px;
    background: #eee;
    border-radius: 3px;
    overflow: hidden;
}
.upload-item .bar i {
    display: block;
    height: 100%;
    width: 0;
    background: var(--primary);
    transition: width .2s;
}
.upload-item.done .bar i { background: var(--ok); }
.upload-item.fail { color: var(--danger); }