:root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --line: #e5e7eb;
    --primary: #0f766e;
    --primary-dark: #0b5f59;
    --radius: 14px;
    --shadow: 0 8px 24px rgba(0,0,0,.06);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    padding: 14px 28px;
    background: #fff;
    border-bottom: 1px solid var(--line);
}

.brand-wrap {
    display: flex;
    align-items: center;
}

.brand-logo {
    height: 64px;
    width: auto;
    display: block;
}

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

.nav a {
    display: inline-block;
    padding: 10px 16px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
}

.nav a:hover {
    background: var(--primary-dark);
}

.container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 24px;
}

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.btn {
    display: inline-block;
    padding: 12px 18px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    border: none;
    font-weight: 700;
    cursor: pointer;
}

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

input, textarea, select {
    width: 100%;
    padding: 12px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    background: #fff;
}

textarea {
    min-height: 120px;
    resize: vertical;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(15,118,110,.12);
}

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

th {
    text-align: left;
    color: var(--muted);
    font-size: 14px;
    padding: 12px;
    border-bottom: 1px solid var(--line);
}

td {
    padding: 14px 12px;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}

@media (max-width: 900px) {
    .topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .container {
        padding: 18px;
    }

    .brand-logo {
        height: 52px;
    }
}

.product-name {
    font-size: 22px;
    font-weight: 800;
    color: #1f2937;
    margin-left: 6px;
}

.product-name {
    font-size: 22px;
    font-weight: 800;
    color: #1f2937;
    margin-left: 6px;
}

.product-name {
    font-size: 22px;
    font-weight: 800;
    color: #1f2937;
    margin-left: 6px;
}

.nav a.active {
    background: #115e59;
    box-shadow: inset 0 0 0 2px rgba(255,255,255,0.18);
}