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

body {
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
    background: radial-gradient(circle at 10% 30%, #0a0f2a, #040716);
    min-height: 100vh;
    padding: 1.5rem;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
}

/* ========== صفحه لاگین ========== */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 30%, #0a0f2a, #040716);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.login-card {
    background: rgba(18, 25, 55, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 2rem;
    padding: 2.5rem;
    width: 90%;
    max-width: 400px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 25px 45px rgba(0,0,0,0.4);
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-card .logo {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.login-card h2 {
    color: white;
    margin-bottom: 1.5rem;
}

.login-input {
    width: 100%;
    padding: 14px 18px;
    margin: 10px 0;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 3rem;
    color: white;
    font-size: 1rem;
}

.login-input:focus {
    outline: none;
    border-color: #ff8c00;
}

.login-btn {
    background: linear-gradient(95deg, #ff8c00, #ff2e63);
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 3rem;
    color: white;
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
    margin-top: 1rem;
    transition: 0.2s;
}

.login-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 20px rgba(255,46,99,0.4);
}

.login-error {
    color: #ff9999;
    margin-top: 1rem;
    font-size: 0.85rem;
}

/* ========== هدر اصلی ========== */
.glass-header {
    background: rgba(18, 25, 55, 0.65);
    backdrop-filter: blur(14px);
    border-radius: 2rem;
    padding: 0.75rem 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
    color: white;
    font-weight: 700;
    font-size: 1.2rem;
}

.logout-btn {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    padding: 8px 18px;
    border-radius: 2rem;
    color: white;
    cursor: pointer;
    transition: 0.2s;
}

.logout-btn:hover {
    background: rgba(255,255,255,0.3);
}

/* ========== کارت آمار ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: rgba(12, 20, 45, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 1.5rem;
    padding: 1.2rem;
    border: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

.stat-title {
    color: #a0b3d9;
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: #ffd966;
}

/* ========== نوار ابزار ========== */
.toolbar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0 1rem;
}

.search-box {
    background: #111827;
    border: 1px solid #2d3a5e;
    padding: 10px 18px;
    border-radius: 2rem;
    color: white;
    width: 250px;
}

.sort-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ========== دکمه‌ها ========== */
.btn {
    border: none;
    padding: 8px 18px;
    border-radius: 2rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    transition: 0.2s;
}

.btn-primary { background: linear-gradient(95deg, #ff8c00, #ff2e63); color: white; }
.btn-outline { background: rgba(255,255,255,0.1); color: white; border: 1px solid rgba(255,255,255,0.2); }
.btn-danger { background: #c72a2a; color: white; }
.btn-success { background: #1f8a4c; color: white; }
.btn-warning { background: #e67e22; color: white; }
.btn-sm { padding: 6px 14px; font-size: 0.75rem; }

/* ========== کارت آپلود ========== */
.upload-card {
    background: rgba(0,0,0,0.35);
    border-radius: 1.5rem;
    padding: 1.2rem 1.5rem;
    margin: 1rem 0;
}

.upload-area {
    border: 2px dashed rgba(255, 140, 0, 0.6);
    border-radius: 1.3rem;
    background: rgba(255, 140, 0, 0.05);
    padding: 1.8rem;
    text-align: center;
    cursor: pointer;
    color: #ffcd94;
    transition: 0.2s;
}

.upload-area.drag-over {
    background: rgba(255, 140, 0, 0.2);
    border-color: #ff8c00;
}

.flex-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.url-input {
    flex: 1;
    padding: 10px 16px;
    border-radius: 2rem;
    border: none;
    background: #1e293b;
    color: white;
}

/* ========== لیست فایل‌ها ========== */
.file-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 1.5rem;
}

.file-card {
    background: rgba(15, 25, 45, 0.7);
    border-radius: 1.2rem;
    padding: 1rem 1.2rem;
    border: 1px solid rgba(255,255,255,0.1);
}

.file-info {
    margin-bottom: 10px;
}

.file-name {
    font-weight: 600;
    color: #f0f3fa;
    font-size: 1rem;
}

.file-meta {
    font-size: 0.7rem;
    color: #8aa1c9;
    margin-top: 4px;
}

.file-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.rename-input {
    background: #1e293b;
    border: 1px solid #ff8c00;
    padding: 6px 12px;
    border-radius: 20px;
    color: white;
    width: 200px;
}

.rename-box {
    margin-top: 10px;
    display: none;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* ========== پنل ادمین ========== */
.admin-form-card {
    background: rgba(0,0,0,0.35);
    border-radius: 1.5rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    color: #a0b3d9;
    margin-bottom: 6px;
    font-size: 0.85rem;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border-radius: 2rem;
    border: none;
    background: #1e293b;
    color: white;
}

.admin-list {
    background: rgba(0,0,0,0.35);
    border-radius: 1.5rem;
    padding: 1.5rem;
}

.admin-card {
    background: rgba(255,255,255,0.05);
    border-radius: 1rem;
    padding: 1rem;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.admin-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.admin-username {
    color: white;
    font-weight: 600;
}

.admin-limit {
    color: #ffd966;
    font-size: 0.75rem;
}

/* ========== پیشرفت بار ========== */
.progress-container {
    margin-top: 12px;
    display: none;
}
.progress-bar-bg {
    height: 6px;
    background: #2d3748;
    border-radius: 10px;
    overflow: hidden;
}
.progress-fill {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, #ffb347, #ff5e3a);
}
.progress-text {
    color: white;
    font-size: 12px;
    margin-top: 5px;
}

/* ========== تاریخچه ========== */
.history-item {
    background: #0f172a;
    padding: 8px 12px;
    border-radius: 20px;
    color: #cbd5e6;
    font-size: 12px;
    margin: 5px 0;
}

summary {
    color: #b9c8ff;
    cursor: pointer;
    margin: 1rem 0;
}

/* ========== ریسپانسیو ========== */
@media (max-width: 768px) {
    body { padding: 1rem; }
    .glass-header { flex-direction: column; gap: 1rem; }
    .stat-number { font-size: 1.5rem; }
    .file-actions { justify-content: flex-start; }
}