:root {
    --bg: #f4f6fb;
    --card: #ffffff;
    --line: #dbe2f0;
    --text: #1a2433;
    --muted: #556274;
    --primary: #0b6ef8;
    --primary-hover: #0a5bd1;
    --danger: #c23d3d;
    --success: #1d8c4b;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(180deg, #eef3ff 0%, #f8fbff 45%, #f4f6fb 100%);
    color: var(--text);
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 20px;
}

.nav {
    background: #0d1c36;
    color: #fff;
}

.nav-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
}

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 8px 24px rgba(18, 35, 66, 0.08);
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

label {
    font-size: 0.92rem;
    display: block;
    margin-bottom: 5px;
    color: var(--muted);
}

input,
textarea,
select {
    width: 100%;
    border: 1px solid #cfd8ea;
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 0.95rem;
    background: #fff;
}

textarea {
    min-height: 92px;
    resize: vertical;
}

.actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 14px;
}

.btn {
    border: none;
    border-radius: 10px;
    padding: 10px 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    color: #fff;
    background: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    color: var(--text);
    background: #e8eefb;
}

.btn-danger {
    color: #fff;
    background: var(--danger);
}

.table-wrap {
    overflow-x: auto;
}

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

th,
td {
    border-bottom: 1px solid var(--line);
    padding: 10px 8px;
    text-align: left;
    vertical-align: top;
}

th {
    background: #f7faff;
    font-size: 0.85rem;
    color: #375078;
}

.flash {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 14px;
    border: 1px solid;
}

.flash.success {
    background: #e9f8ef;
    border-color: #9cd9b2;
    color: #16613a;
}

.flash.error {
    background: #feecec;
    border-color: #f2b4b4;
    color: #7f2222;
}

.text-right {
    text-align: right;
}

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

@media (max-width: 860px) {
    .grid {
        grid-template-columns: 1fr;
    }

    .nav-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}