:root {
    --color-bg: #f5f7fa;
    --color-surface: #ffffff;
    --color-primary: #2b5fd9;
    --color-primary-dark: #1f47ab;
    --color-text: #1a1f2b;
    --color-text-muted: #5b6474;
    --color-border: #e2e6ed;
    --color-danger: #c0392b;
    --radius: 10px;
    --shadow: 0 4px 16px rgba(20, 30, 60, 0.08);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
}

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px 32px;
}

.auth-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 4px; }
.auth-logo {
    width: 36px; height: 36px;
    background: var(--color-primary);
    color: #fff; font-weight: 700;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
}
.auth-brand h1 { font-size: 20px; margin: 0; }
.auth-subtitle { color: var(--color-text-muted); margin: 0 0 24px; }

form label { display: block; font-size: 13px; font-weight: 600; margin: 14px 0 6px; }
form input[type="text"],
form input[type="email"],
form input[type="tel"],
form input[type="password"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 14px;
}
.checkbox-row { display: flex; align-items: center; gap: 8px; font-weight: 400 !important; }

.btn-primary {
    width: 100%;
    margin-top: 20px;
    padding: 11px 16px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}
.btn-primary:hover { background: var(--color-primary-dark); }

.btn-secondary {
    padding: 8px 14px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    cursor: pointer;
}

.auth-links { margin-top: 18px; text-align: center; font-size: 13px; }
.auth-links a { color: var(--color-primary); text-decoration: none; }

.form-error {
    background: #fdecea;
    color: var(--color-danger);
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 12px;
}

.topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 24px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }

.content-placeholder { max-width: 720px; margin: 60px auto; padding: 0 24px; }