:root {
    --bg-color: #ecfdf5;
    --text-color: #064e3b;
    --container-bg: rgba(255, 255, 255, 0.85);
    --panel-bg: rgba(255, 255, 255, 0.7);
    --input-bg: #ffffff;
    --primary-color: #16a34a;
    --primary-color-2: #22c55e;
    --border-color: #bbf7d0;
    --muted-color: #6b7280;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(34,197,94,0.18), transparent 40%),
        radial-gradient(circle at top right, rgba(16,185,129,0.12), transparent 35%),
        var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    min-height: 100vh;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    background: var(--container-bg);
    padding: 28px;
    border-radius: 18px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    backdrop-filter: blur(8px);
}

h1, h2, h3 {
    text-align: center;
    color: var(--primary-color);
}

.panel {
    background: var(--panel-bg);
    padding: 20px;
    border-radius: 16px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
}

input, select {
    width: 100%;
    padding: 12px 14px;
    margin: 10px 0;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background-color: var(--input-bg);
    color: var(--text-color);
    transition: all 0.2s ease;
}

input::placeholder {
    color: var(--muted-color);
}

input:focus, select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(34,197,94,0.25);
}

button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-color-2));
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 12px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.2s ease;
    box-shadow: 0 6px 18px rgba(34,197,94,0.25);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(34,197,94,0.35);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    margin-bottom: 40px;
    border-radius: 14px;
    overflow: hidden;
    background: white;
}

th, td {
    padding: 14px;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
}

th {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-color-2));
    color: white;
}

tr:hover {
    background-color: rgba(34,197,94,0.1);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

a:hover {
    color: #15803d;
}

/* logout button */
a[href*="logout"],
a.logout {
    color: #b91c1c;
    background: #fee2e2;
    border: 1px solid #fecaca;
    padding: 8px 14px;
    border-radius: 10px;
    font-weight: 600;
}

a[href*="logout"]:hover,
a.logout:hover {
    color: white;
    background: #ef4444;
}

@media (max-width: 768px) {
    body {
        padding: 12px;
    }

    .container {
        padding: 18px;
    }

    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}