:root {
    --bg: #f5f7fa;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-contrast: #ffffff;
    --danger: #dc2626;
    --radius: 12px;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    --focus: 0 0 0 3px rgba(37, 99, 235, 0.35);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.55;
}

body {
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 32px 20px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px 36px;
    width: 100%;
    max-width: 540px;
}

h1 {
    font-size: 1.7rem;
    margin: 0 0 10px;
    letter-spacing: -0.01em;
}

.lead {
    margin: 0 0 28px;
    color: var(--text);
    font-size: 1.02rem;
}

.download-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 32px;
}
.download-form label {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text);
}
.download-form input[type="text"] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font: inherit;
    color: var(--text);
    background: #fff;
}
.download-form input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--focus);
}
.field-error {
    margin: 2px 0 0;
    color: var(--danger);
    font-size: 0.9rem;
}

.forgot-password {
    margin: 12px 0 0;
    text-align: center;
    color: var(--muted);
    font-size: 0.92rem;
}
.forgot-password a {
    color: var(--primary);
    text-decoration: none;
    margin-left: 4px;
}
.forgot-password a:hover { text-decoration: underline; }

.btn {
    font: inherit;
    cursor: pointer;
    border-radius: 8px;
    padding: 12px 18px;
    border: 1px solid transparent;
    transition: background 0.15s ease, border-color 0.15s ease;
}
.btn:focus-visible {
    outline: none;
    box-shadow: var(--focus);
}
.btn-primary {
    background: var(--primary);
    color: var(--primary-contrast);
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-big {
    padding: 14px 20px;
    font-size: 1.05rem;
    font-weight: 500;
    margin-top: 6px;
}

.steps {
    margin: 0 0 24px;
    padding: 20px 22px;
    background: #f9fafb;
    border: 1px solid var(--border);
    border-radius: 8px;
}
.steps h2 {
    margin: 0 0 10px;
    font-size: 1.05rem;
    font-weight: 600;
}
.steps ol {
    margin: 0;
    padding-left: 22px;
}
.steps li {
    margin: 8px 0;
}
.steps em {
    background: #fef3c7;
    padding: 1px 4px;
    border-radius: 3px;
    font-style: normal;
}
.steps .note {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.faq {
    margin-top: 10px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
}
.faq summary {
    cursor: pointer;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 2px 0;
    list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
    content: '▸';
    display: inline-block;
    margin-right: 8px;
    color: var(--muted);
    transition: transform 0.15s;
}
.faq[open] summary::before { transform: rotate(90deg); }
.faq p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 0.95rem;
}

@media (max-width: 480px) {
    .card { padding: 28px 22px; }
    h1 { font-size: 1.45rem; }
}