* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background: #f4f6f9;
    color: #1f2933;
    line-height: 1.5;
}

.container {
    max-width: 760px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

header h1 {
    margin: 0 0 4px;
    font-size: 1.7rem;
}
header p {
    margin: 0 0 24px;
    color: #6b7280;
}

h2 { font-size: 1.15rem; margin: 0 0 12px; }

section, .result {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    padding: 18px 20px;
    margin-bottom: 18px;
    box-shadow: 0 1px 2px rgba(0,0,0,.04);
}

/* Диагностика */
.status-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 8px;
    margin-bottom: 8px;
    background: #f9fafb;
    border-left: 4px solid #cbd5e1;
    font-size: .95rem;
}
.status-item:last-child { margin-bottom: 0; }
.status-item.success { background: #ecfdf5; border-left-color: #10b981; }
.status-item.error   { background: #fef2f2; border-left-color: #ef4444; }
.status-item.loading,
.status-item.pending { background: #f3f4f6; border-left-color: #9ca3af; }
.status-item a { color: #2563eb; }

/* Выбор сертификата */
.cert-list {
    width: 100%;
    padding: 6px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: .95rem;
    background: #fff;
}
.cert-list option { padding: 6px 8px; }
.cert-info {
    margin-top: 12px;
    padding: 4px 14px;
    background: #f9fafb;
    border: 1px solid #eef2f7;
    border-radius: 8px;
    font-size: .9rem;
    word-break: break-word;
}
.cert-loading { padding: 10px 0; color: #6b7280; }
.cert-row {
    display: flex;
    gap: 12px;
    padding: 7px 0;
    border-bottom: 1px solid #eef2f7;
}
.cert-row:last-child { border-bottom: none; }
.cert-label {
    flex: 0 0 130px;
    color: #6b7280;
}
.cert-value {
    flex: 1;
    font-weight: 600;
    color: #1f2933;
}

/* Блок «Скачать КриптоПро» при неуспешной диагностике */
.download-help {
    margin-top: 12px;
    padding: 14px 16px;
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: 8px;
    font-size: .92rem;
}
.download-help p { margin: 0 0 10px; }
.download-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.btn-download {
    width: auto;
    flex: 1 1 220px;
    margin: 0;
    padding: 11px 16px;
    background: #2563eb;
    color: #fff;
    text-align: center;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
}
.btn-download:hover { background: #1d4ed8; }
.download-note { margin: 10px 0 0 !important; color: #92400e; font-size: .85rem; }

/* Загрузка файла */
.drop-zone {
    border: 2px dashed #cbd5e1;
    border-radius: 10px;
    padding: 32px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color .15s, background .15s;
    background: #fff;
}
.drop-zone:hover { border-color: #2563eb; background: #f8fafc; }
.drop-icon { font-size: 2.2rem; }
.drop-zone h2 { margin: 10px 0 4px; }
.drop-zone p { margin: 0; color: #6b7280; font-size: .9rem; }

.file-info {
    margin-top: 14px;
    padding: 12px 14px;
    background: #eff6ff;
    border-radius: 8px;
    font-size: .92rem;
}
.file-info p { margin: 2px 0; }

/* Кнопки */
.btn {
    display: inline-block;
    width: 100%;
    padding: 13px 18px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 18px;
    transition: opacity .15s;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: #2563eb; color: #fff; }
.btn-primary:not(:disabled):hover { background: #1d4ed8; }
.btn-success { background: #10b981; color: #fff; }
.btn-success:hover { background: #059669; }

/* Результат и ошибки */
.result { border-left: 4px solid #10b981; }
.result h3 { margin: 0 0 8px; }

.error {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
    border-radius: 8px;
    padding: 12px 14px;
    margin-bottom: 18px;
}