:root {
    --bg: #f4f6f8;
    --panel: #ffffff;
    --text: #1a2332;
    --muted: #5c6778;
    --accent: #0b6e4f;
    --border: #d8dee6;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #eef3f7 0%, var(--bg) 240px);
}

.wrap {
    max-width: 720px;
    margin: 0 auto;
    padding: 1.5rem;
}

.site-header {
    background: var(--panel);
    border-bottom: 1px solid var(--border);
}

.site-header .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-header nav a {
    margin-left: 1rem;
    color: var(--accent);
    text-decoration: none;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
}

.panel h1 {
    margin-top: 0;
    font-size: 1.5rem;
}

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

input[type="email"],
input[type="password"],
input[type="month"] {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font: inherit;
}

label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
}

.input {
    margin-bottom: 1rem;
}

button,
.button-primary {
    background: var(--accent);
    color: #fff;
    border: 0;
    border-radius: 6px;
    padding: 0.65rem 1rem;
    font: inherit;
    cursor: pointer;
}

.message {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.message.error {
    background: #fde8e8;
    color: #8a1f1f;
}

.message.success {
    background: #e8f6ee;
    color: #0b6e4f;
}