:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
    --soft: #eff6ff;
    --shadow: 0 16px 40px rgba(15, 23, 42, .07);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    direction: rtl;
    font-family: "Noto Kufi Arabic", Tahoma, Arial, sans-serif;
    background: radial-gradient(circle at top right, rgba(37,99,235,.10), transparent 30%), var(--bg);
    color: var(--text);
    min-height: 100svh;
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font-family: inherit; }
.app-shell { min-height: 100svh; display: grid; grid-template-columns: 280px 1fr; }
.sidebar {
    background: rgba(255,255,255,.92);
    border-left: 1px solid var(--border);
    padding: 22px 16px;
    position: sticky;
    top: 0;
    height: 100svh;
    overflow-y: auto;
}
.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.brand-logo {
    width: 48px; height: 48px; display: grid; place-items: center;
    border-radius: 16px; color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 14px 26px rgba(37,99,235,.22);
}
.brand-title { font-weight: 900; font-size: 21px; line-height: 1.1; }
.brand-subtitle { color: var(--muted); font-size: 11px; margin-top: 4px; }
.nav { display: flex; flex-direction: column; gap: 7px; }
.nav a, .nav button {
    width: 100%; border: 0; background: transparent; cursor: pointer; color: var(--text);
    display: flex; align-items: center; gap: 10px; padding: 12px 13px;
    border-radius: 14px; font-weight: 700; font-size: 13px; text-align: right;
}
.nav a:hover, .nav button:hover, .nav .active { background: var(--soft); color: var(--primary-dark); }
.main { min-width: 0; padding: 24px; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 24px; }
.mobile-menu { display: none; width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 14px; background: #fff; }
.user-chip { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: #fff; border: 1px solid var(--border); border-radius: 999px; box-shadow: 0 8px 22px rgba(15,23,42,.04); }
.user-avatar { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--soft); color: var(--primary); font-weight: 900; }
.page-title { margin: 0 0 7px; font-size: clamp(22px, 4vw, 34px); letter-spacing: -.6px; }
.page-desc { color: var(--muted); margin: 0; line-height: 1.9; font-size: 14px; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
    background: rgba(255,255,255,.96);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 20px;
    box-shadow: var(--shadow);
}
.stat { display: flex; gap: 14px; align-items: center; }
.stat-icon { width: 48px; height: 48px; border-radius: 16px; background: var(--soft); color: var(--primary); display: grid; place-items: center; flex: 0 0 auto; }
.stat-num { font-size: 27px; font-weight: 900; }
.stat-label { color: var(--muted); font-size: 13px; margin-top: 3px; }
.section-title { display: flex; align-items: center; gap: 9px; margin: 0 0 15px; font-size: 18px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.field { display: flex; flex-direction: column; gap: 8px; }
label { font-size: 13px; font-weight: 800; }
input, select, textarea {
    width: 100%; min-height: 48px; border: 1px solid var(--border); border-radius: 15px;
    padding: 10px 13px; background: #fff; color: var(--text); outline: none; font-size: 14px;
}
textarea { min-height: 110px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37,99,235,.10); }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 46px; padding: 10px 16px; border: 0; border-radius: 15px;
    cursor: pointer; font-weight: 900; font-size: 13px;
}
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; box-shadow: 0 12px 24px rgba(37,99,235,.20); }
.btn-soft { background: var(--soft); color: var(--primary-dark); }
.btn-success { background: #ecfdf5; color: #047857; }
.btn-danger { background: #fef2f2; color: #b91c1c; }
.btn-warning { background: #fffbeb; color: #b45309; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 20px; background: #fff; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { padding: 14px 13px; border-bottom: 1px solid var(--border); text-align: right; font-size: 13px; vertical-align: middle; }
th { background: #f8fafc; color: #334155; font-weight: 900; }
tr:last-child td { border-bottom: 0; }
.badge { display: inline-flex; align-items: center; gap: 5px; border-radius: 999px; padding: 5px 10px; font-size: 11px; font-weight: 900; }
.badge-green { background: #ecfdf5; color: #047857; }
.badge-blue { background: #eff6ff; color: #1d4ed8; }
.badge-yellow { background: #fffbeb; color: #b45309; }
.badge-red { background: #fef2f2; color: #b91c1c; }
.alert { padding: 14px 16px; border-radius: 16px; margin-bottom: 16px; font-size: 13px; line-height: 1.8; }
.alert-success { background: #ecfdf5; color: #047857; border: 1px solid #bbf7d0; }
.alert-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-info { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }
.hero {
    max-width: 1120px; margin: 0 auto; padding: 38px 18px;
}
.hero-card { overflow: hidden; position: relative; min-height: 420px; display: grid; grid-template-columns: 1.1fr .9fr; gap: 20px; align-items: center; }
.hero h1 { font-size: clamp(32px, 7vw, 58px); line-height: 1.25; margin: 0 0 14px; letter-spacing: -1px; }
.hero p { color: var(--muted); line-height: 2; font-size: 16px; margin: 0 0 22px; }
.hero-visual { background: linear-gradient(135deg, rgba(37,99,235,.10), rgba(16,185,129,.10)); border-radius: 30px; padding: 20px; }
.course-card, .file-card {
    display: flex; align-items: center; gap: 14px; padding: 16px;
    border: 1px solid var(--border); border-radius: 20px; background: #fff;
}
.course-icon, .file-icon { width: 48px; height: 48px; border-radius: 16px; display: grid; place-items: center; flex: 0 0 auto; color: var(--primary); background: var(--soft); }
.card-title { font-weight: 900; margin-bottom: 4px; }
.card-meta { color: var(--muted); font-size: 12px; line-height: 1.8; }
.login-page { min-height: 100svh; display: grid; place-items: center; padding: 18px; }
.login-card { width: 100%; max-width: 470px; }
.footer-note { color: var(--muted); font-size: 12px; text-align: center; margin-top: 14px; line-height: 1.8; }
.ico { flex: 0 0 auto; }
.hidden { display: none !important; }
@media (max-width: 980px) {
    .app-shell { grid-template-columns: 1fr; }
    .sidebar { position: fixed; z-index: 50; inset: 0 auto 0 0; width: 82%; max-width: 320px; transform: translateX(-105%); transition: .2s ease; box-shadow: var(--shadow); }
    .sidebar.open { transform: translateX(0); }
    .main { padding: 16px; }
    .mobile-menu { display: inline-grid; place-items: center; }
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .form-grid { grid-template-columns: 1fr; }
    .hero-card { grid-template-columns: 1fr; min-height: auto; }
    .topbar { align-items: flex-start; }
}
@media (max-width: 540px) {
    .card { border-radius: 20px; padding: 16px; }
    .course-card, .file-card { align-items: flex-start; }
    .actions .btn { width: 100%; }
    .user-chip { padding: 8px 10px; font-size: 12px; }
    .page-title { font-size: 24px; }
}

/* v1.1 auth improvements */
.auth-links {
    margin-top: 16px;
    text-align: center;
    font-weight: 800;
}
.auth-links a {
    color: var(--primary);
    text-decoration: none;
}
.role-picker {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}
.role-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.role-option span {
    min-height: 54px;
    border: 1px solid var(--border);
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    cursor: pointer;
    background: #fff;
    color: var(--text);
    font-weight: 900;
    transition: .18s ease;
}
.role-option input:checked + span {
    border-color: var(--primary);
    background: #eff6ff;
    color: var(--primary-dark);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, .08);
}
.register-card {
    max-width: 520px;
}
@media (min-width: 640px) {
    .role-picker {
        grid-template-columns: repeat(3, 1fr);
    }
    .role-option span {
        justify-content: center;
        text-align: center;
        flex-direction: column;
        gap: 6px;
    }
}

/* v1.2 interface refinements */
.dashboard-hero {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 14px;
    align-items: start;
    margin-bottom: 20px;
    padding: 22px;
    border-radius: 30px;
    border: 1px solid rgba(226, 232, 240, .95);
    background:
        radial-gradient(circle at top right, rgba(37,99,235,.12), transparent 34%),
        linear-gradient(135deg, rgba(255,255,255,.98), rgba(239,246,255,.88));
    box-shadow: 0 18px 44px rgba(15,23,42,.07);
}
.hero-title-area { min-width: 0; }
.name-under-title {
    display: flex;
    align-items: center;
    gap: 9px;
    flex-wrap: wrap;
    margin: 2px 0 10px;
    color: var(--muted);
    font-size: 13px;
}
.name-under-title strong { color: var(--text); font-weight: 900; }
.mini-avatar {
    width: 30px;
    height: 30px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    color: var(--primary);
    background: var(--soft);
    font-weight: 900;
}
.user-chip-wide { align-self: start; }
.hero-meta-row {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}
.hero-meta-row > div,
.horizontal-data > div {
    min-width: 0;
    padding: 13px 14px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: rgba(255,255,255,.82);
}
.hero-meta-row span,
.horizontal-data span {
    display: block;
    color: var(--muted);
    font-size: 11px;
    margin-bottom: 6px;
}
.hero-meta-row strong,
.horizontal-data strong {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 12px;
}
.horizontal-data {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}
.quick-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 17px;
    border: 1px solid var(--border);
    border-radius: 22px;
    background: rgba(255,255,255,.96);
    box-shadow: 0 12px 30px rgba(15,23,42,.045);
}
.quick-card > .ico {
    width: 42px;
    height: 42px;
    padding: 10px;
    border-radius: 15px;
    background: var(--soft);
    color: var(--primary);
}
.quick-card strong { display:block; font-weight:900; margin-bottom:4px; }
.quick-card span { color: var(--muted); font-size: 12px; line-height: 1.7; }
.modern-course { transition: .18s ease; }
.modern-course:hover { transform: translateY(-3px); box-shadow: 0 18px 36px rgba(15,23,42,.08); }
.file-protected-card { position: relative; overflow: hidden; }
.file-protected-card:before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.preview-box {
    margin-top: 14px;
    border: 1px dashed #bfdbfe;
    background: linear-gradient(135deg, #eff6ff, #ffffff);
    border-radius: 18px;
    padding: 14px;
}
.preview-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 900;
    color: var(--primary-dark);
    margin-bottom: 10px;
}
.preview-lines {
    display: grid;
    gap: 10px;
}
.preview-lines div {
    display: grid;
    grid-template-columns: 125px 1fr;
    gap: 10px;
    align-items: start;
}
.preview-lines span { color: var(--muted); font-size: 12px; }
.preview-lines strong { font-size: 12px; line-height: 1.9; font-weight: 800; }
.no-copy {
    -webkit-user-select: none;
    user-select: none;
}
.btn[disabled] { opacity: .65; cursor: not-allowed; }
.stat-card.big-stat { padding: 22px; }
@media (max-width: 980px) {
    .dashboard-hero { grid-template-columns: auto 1fr; padding: 18px; border-radius: 24px; }
    .user-chip-wide { display:none; }
    .hero-meta-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .horizontal-data { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 540px) {
    .dashboard-hero { padding: 16px; }
    .hero-meta-row { grid-template-columns: 1fr; }
    .horizontal-data { grid-template-columns: 1fr; }
    .preview-lines div { grid-template-columns: 1fr; gap: 4px; }
}

.upload-progress {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: #f8fafc;
}

.upload-progress-bar {
    width: 100%;
    height: 12px;
    overflow: hidden;
    border-radius: 999px;
    background: #e2e8f0;
}

.upload-progress-bar span {
    display: block;
    width: 0%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #2563eb, #1d4ed8);
    transition: width .2s ease;
}

.upload-progress-text {
    margin-top: 8px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.8;
    font-weight: 700;
}