@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --bg:           #000000;
    --bg-2:         #050508;
    --surface:      #0a0a0f;
    --surface-2:    #0f0f1a;
    --surface-3:    #141428;
    --card-border:  rgba(30, 120, 255, 0.12);
    --card-hover-border: rgba(30, 120, 255, 0.45);

    --blue:         #1e78ff;
    --blue-bright:  #3d9bff;
    --blue-dim:     rgba(30, 120, 255, 0.08);
    --blue-glow:    rgba(30, 120, 255, 0.25);
    --blue-glow2:   rgba(30, 120, 255, 0.5);

    --text:         #f0f4ff;
    --text-muted:   #5568a0;
    --text-soft:    #8899cc;

    --success:      #00e09e;
    --success-dim:  rgba(0, 224, 158, 0.08);
    --warning:      #f59e0b;
    --danger:       #ff3b5c;

    --border:       rgba(255,255,255,0.05);
    --sidebar-width: 256px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg);
    color: var(--text);
    display: flex;
    min-height: 100vh;
    font-size: 0.95rem;
    overflow-x: hidden;
    background-image:
        radial-gradient(ellipse 60% 40% at 10% 0%, rgba(30,120,255,0.07) 0%, transparent 60%),
        radial-gradient(ellipse 40% 30% at 90% 80%, rgba(30,120,255,0.05) 0%, transparent 60%);
}

/* ─── Scrollbar ─────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(30,120,255,0.25); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: rgba(30,120,255,0.5); }

/* ─── Sidebar ────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-width);
    background: #000;
    border-right: 1px solid rgba(30,120,255,0.1);
    padding: 28px 18px;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0; top: 0;
    z-index: 50;
    transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
    overflow: hidden;
}

.sidebar::before {
    content: '';
    position: absolute;
    top: -120px;
    left: -60px;
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(30,120,255,0.12) 0%, transparent 70%);
    pointer-events: none;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 44px;
    padding: 0 8px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--blue), #0052cc);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    box-shadow: 0 0 18px var(--blue-glow);
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -0.4px;
    color: #fff;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 11px 14px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.2s ease;
    font-weight: 500;
    font-size: 0.92rem;
    position: relative;
    border: 1px solid transparent;
}

.nav-link i { font-size: 1.15rem; flex-shrink: 0; }

.nav-link:hover {
    background: rgba(30,120,255,0.08);
    color: var(--blue-bright);
    border-color: rgba(30,120,255,0.15);
}

.nav-link.active {
    background: linear-gradient(135deg, rgba(30,120,255,0.18), rgba(30,120,255,0.08));
    color: #fff;
    border-color: rgba(30,120,255,0.35);
    box-shadow: inset 0 0 20px rgba(30,120,255,0.06);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    transform: translateY(-50%);
    width: 3px; height: 60%;
    background: var(--blue);
    border-radius: 0 3px 3px 0;
    box-shadow: 0 0 10px var(--blue-glow2);
}

/* ─── Main Content ───────────────────────────────────────── */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 36px 40px;
    transition: margin-left 0.3s ease;
    min-height: 100vh;
}

/* ─── Top Header ─────────────────────────────────────────── */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 36px;
}

.page-title h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.6px;
    color: var(--text);
    line-height: 1;
}

.page-title p {
    color: var(--text-muted);
    margin-top: 6px;
    font-size: 0.88rem;
}

.mobile-toggle {
    display: none;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 9px;
    transition: all 0.2s;
}

.mobile-toggle:hover { border-color: var(--blue); color: var(--blue); }

/* ─── Stat Cards ─────────────────────────────────────────── */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.card {
    background: linear-gradient(145deg, #090912, #0c0c1a);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 26px 28px;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    position: relative;
    overflow: hidden;
}

.card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(30,120,255,0.4), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.card:hover {
    transform: translateY(-3px);
    border-color: var(--card-hover-border);
    box-shadow: 0 12px 40px rgba(30,120,255,0.1), 0 2px 8px rgba(0,0,0,0.4);
}

.card:hover::after { opacity: 1; }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 18px;
}

.card h3 {
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--blue-dim);
    color: var(--blue-bright);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    border: 1px solid rgba(30,120,255,0.15);
}

.card .value {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -1px;
    line-height: 1;
}

.card small {
    display: block;
    margin-top: 10px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.highlight-green { color: var(--success) !important; }

/* ─── Table ──────────────────────────────────────────────── */
.table-container {
    background: linear-gradient(145deg, #090912, #0c0c1a);
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border);
    overflow: hidden;
}

.table-header {
    padding: 22px 28px;
    border-bottom: 1px solid rgba(30,120,255,0.08);
    display: flex;
    align-items: center;
    gap: 10px;
}

.table-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.3px;
}

.table-responsive { width: 100%; overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }

th, td {
    padding: 14px 24px;
    text-align: left;
    border-bottom: 1px solid rgba(255,255,255,0.03);
}

th {
    background: rgba(0,0,0,0.3);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

tr:last-child td { border-bottom: none; }

tr:hover td {
    background: rgba(30,120,255,0.04);
}

tbody td { color: var(--text-soft); font-size: 0.9rem; }
tbody td:first-child { color: var(--text-muted); font-family: monospace; font-size: 0.85rem; }

/* ─── Status Badges ──────────────────────────────────────── */
.status-badge {
    padding: 5px 12px;
    border-radius: 99px;
    font-size: 0.72rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    letter-spacing: 0.4px;
    text-transform: uppercase;
}

.status-badge::before {
    content: '';
    width: 5px; height: 5px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 6px currentColor;
}

.status-paid {
    background: var(--success-dim);
    color: var(--success);
    border: 1px solid rgba(0, 224, 158, 0.2);
}

.status-pending {
    background: rgba(245, 158, 11, 0.08);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

/* ─── Forms ──────────────────────────────────────────────── */
.form-group { margin-bottom: 20px; }

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-soft);
    font-size: 0.85rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background-color: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.93rem;
    transition: all 0.2s ease;
    appearance: none;
    -webkit-appearance: none;
}

.form-control:focus {
    outline: none;
    border-color: var(--blue);
    background: rgba(30,120,255,0.04);
    box-shadow: 0 0 0 3px rgba(30,120,255,0.12);
}

.form-control::placeholder { color: rgba(255,255,255,0.15); }

select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%235568a0'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    background-size: 14px;
    padding-right: 44px;
}

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--blue), #0052cc);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.93rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    letter-spacing: 0.2px;
    box-shadow: 0 4px 20px rgba(30,120,255,0.25);
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
    opacity: 0;
    transition: opacity 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(30,120,255,0.4);
}

.btn:hover::after { opacity: 1; }
.btn:active { transform: translateY(0); box-shadow: 0 2px 10px rgba(30,120,255,0.2); }
.btn i { font-size: 1.1rem; }

/* ─── Login Card ─────────────────────────────────────────── */
.login-card {
    width: 100%;
    max-width: 400px;
    background: rgba(9, 9, 20, 0.85);
    backdrop-filter: blur(24px);
    border: 1px solid rgba(30,120,255,0.2);
    border-radius: 24px;
    padding: 44px 40px;
    box-shadow: 0 30px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.03);
}

/* ─── Overlay ────────────────────────────────────────────── */
.overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
    z-index: 40;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.overlay.active { opacity: 1; pointer-events: auto; }

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 80%;
        max-width: 300px;
        box-shadow: 20px 0 60px rgba(0,0,0,0.8);
    }

    .sidebar.active { transform: translateX(0); }

    .main-content {
        margin-left: 0;
        padding: 20px 16px;
    }

    .top-header { margin-bottom: 24px; align-items: flex-start; }

    .page-title {
        display: grid;
        grid-template-columns: auto 1fr;
        grid-template-rows: auto auto;
        align-items: center;
        column-gap: 12px;
        width: 100%;
    }

    .mobile-toggle {
        display: flex;
        grid-row: 1; grid-column: 1;
        width: 40px; height: 40px;
        align-items: center; justify-content: center;
    }

    .page-title h1 { grid-row: 1; grid-column: 2; font-size: 1.35rem; }
    .page-title p  { grid-row: 2; grid-column: 1 / span 3; margin-top: 10px; font-size: 0.83rem; }

    .card-grid { grid-template-columns: 1fr; gap: 14px; }
    .card { padding: 20px; }
    .card .value { font-size: 1.8rem; }

    .table-container { border-radius: 0; border-left: none; border-right: none; margin: 0 -16px; width: calc(100% + 32px); }
    th, td { padding: 12px 10px; font-size: 0.83rem; white-space: nowrap; }

    .login-card { margin: 20px; padding: 28px 24px; }
}