:root {
    --bg: #121212;
    --surface: #1e1e1e;
    --surface-2: #252525;
    --surface-3: #2d2d2d;
    --primary: #00c853;
    --primary-dark: #00a844;
    --text: #ffffff;
    --muted: #c0c0c0;
    --danger: #ff5252;
    --warning: #ffb300;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
    --radius: 18px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background:
        radial-gradient(circle at top right, rgba(0, 200, 83, 0.15), transparent 25%),
        linear-gradient(180deg, #151515 0%, #101010 100%);
    color: var(--text);
}

a {
    color: inherit;
    text-decoration: none;
}

.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: rgba(30, 30, 30, 0.95);
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    padding: 24px 18px;
    position: sticky;
    top: 0;
    height: 100vh;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 28px;
}

.brand i {
    color: var(--primary);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: 14px;
    color: var(--muted);
    margin-bottom: 8px;
    transition: 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(0, 200, 83, 0.14);
    color: var(--text);
    transform: translateX(3px);
}

.main {
    flex: 1;
    padding: 24px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.page-title {
    font-size: 1.8rem;
    font-weight: 700;
}

.muted {
    color: var(--muted);
}

.grid {
    display: grid;
    gap: 20px;
}

.grid.cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid.cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
    background: rgba(30, 30, 30, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: var(--shadow);
    border-radius: var(--radius);
    padding: 22px;
}

.card h3,
.card h4 {
    margin-top: 0;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin: 6px 0;
}

.btn,
button,
input[type="submit"] {
    border: 0;
    border-radius: 999px;
    padding: 12px 18px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: 0.2s ease;
}

.btn-primary {
    background: var(--primary);
    color: #051b0d;
    font-weight: 700;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--surface-3);
    color: var(--text);
}

.btn-danger {
    background: rgba(255, 82, 82, 0.2);
    color: #ffd5d5;
}

form {
    display: grid;
    gap: 16px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

label {
    display: grid;
    gap: 8px;
    font-size: 0.92rem;
    color: var(--muted);
}

input,
select,
textarea {
    width: 100%;
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    padding: 12px 14px;
    font: inherit;
}

textarea {
    min-height: 160px;
    resize: vertical;
}

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

th,
td {
    text-align: left;
    padding: 14px 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    vertical-align: top;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 0.82rem;
    background: rgba(255, 255, 255, 0.08);
}

.badge.success {
    background: rgba(0, 200, 83, 0.16);
    color: #a8f5c6;
}

.badge.warning {
    background: rgba(255, 179, 0, 0.16);
    color: #ffe9a6;
}

.badge.danger {
    background: rgba(255, 82, 82, 0.16);
    color: #ffcbcb;
}

.flash {
    padding: 14px 16px;
    border-radius: 14px;
    margin-bottom: 18px;
}

.flash.success {
    background: rgba(0, 200, 83, 0.14);
}

.flash.error {
    background: rgba(255, 82, 82, 0.14);
}

.auth-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-card {
    width: min(460px, 100%);
}

.table-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.inline {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.small {
    font-size: 0.88rem;
}

@media (max-width: 980px) {
    .layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: static;
    }

    .grid.cols-3,
    .grid.cols-2,
    .form-grid {
        grid-template-columns: 1fr;
    }
}