/* Базовые сбросы */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Calibri", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    color: #212121;
    background: #f5f5f7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* Header */
.site-header {
    background: #1A237E;
    color: #fff;
    padding: 18px 0;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-size: 15px;
    letter-spacing: 0.3px;
}

.brand strong {
    font-size: 17px;
    letter-spacing: 0.5px;
}

.user-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.username {
    opacity: 0.85;
    font-size: 14px;
}

.logout-form {
    margin: 0;
}

.btn-link,
a.btn-link {
    background: none;
    border: none;
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    padding: 4px 8px;
    opacity: 0.85;
    transition: opacity 0.15s;
    text-decoration: none;
    display: inline-block;
}

.btn-link:hover,
a.btn-link:hover {
    opacity: 1;
    text-decoration: underline;
}

/* Заметная кнопка в верхней панели — белый текст в рамке.
   Используется для «Сменить пароль» и «Выйти». */
.nav-btn,
a.nav-btn,
button.nav-btn {
    display: inline-block;
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff !important;
    font-size: 14px;
    font-family: inherit;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 6px;
    padding: 6px 14px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s;
    line-height: 1.2;
}

.nav-btn:hover,
a.nav-btn:hover,
button.nav-btn:hover {
    background: rgba(255, 255, 255, 0.22);
    border-color: #ffffff;
    text-decoration: none;
}

/* Чтобы шапка не «слипалась» на узких экранах */
@media (max-width: 720px) {
    .site-header .container {
        flex-wrap: wrap;
        gap: 10px;
    }
    .user-nav {
        flex-wrap: wrap;
        gap: 10px;
    }
}

/* Main */
main {
    flex: 1;
    padding: 40px 0 64px;
}

.page-header {
    margin-bottom: 28px;
}

h1 {
    font-size: 26px;
    margin: 0 0 8px;
    color: #1A237E;
    font-weight: 600;
}

h3 {
    font-size: 17px;
    margin: 0 0 12px;
    color: #1A237E;
}

.muted {
    color: #616161;
    font-size: 14px;
}

/* Flash-сообщения */
.flash-messages {
    margin-bottom: 20px;
}

.flash {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 10px;
    font-size: 14px;
}

.flash-error {
    background: #FFEBEE;
    color: #C62828;
    border-left: 3px solid #C62828;
}

.flash-success {
    background: #E8F5E9;
    color: #2E7D32;
    border-left: 3px solid #2E7D32;
}

/* Карточка (форма) */
.card {
    background: #fff;
    padding: 32px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    border: 1px solid #e0e0e0;
}

.auth-card {
    max-width: 420px;
    margin: 60px auto 0;
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
    border: 1px solid #e0e0e0;
}

.auth-card h1 {
    text-align: center;
    margin-bottom: 4px;
}

.auth-card .muted {
    text-align: center;
    margin-bottom: 28px;
}

/* Формы */
.auth-form label,
.process-form label {
    display: block;
    margin-bottom: 18px;
}

.auth-form label span,
.process-form label span {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: #424242;
    margin-bottom: 6px;
}

input[type="text"],
input[type="password"],
input[type="file"],
select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #cfd8dc;
    border-radius: 6px;
    font-size: 15px;
    font-family: inherit;
    background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
}

input[type="text"]:focus,
input[type="password"]:focus,
select:focus {
    outline: none;
    border-color: #1A237E;
    box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
}

input[type="file"] {
    padding: 8px;
    background: #fafafa;
}

/* Двухколоночный блок */
.form-row.two-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-row.two-cols label {
    margin-bottom: 0;
}

.form-actions {
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid #eee;
}

/* Кнопки */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, transform 0.05s;
}

.btn-primary {
    background: #1A237E;
    color: #fff;
    width: 100%;
}

.btn-primary:hover {
    background: #283593;
}

.btn-primary:active {
    transform: translateY(1px);
}

/* Инфо-блок */
.info-block {
    margin-top: 32px;
    padding: 24px 28px;
    background: #E3F2FD;
    border-radius: 10px;
    border-left: 4px solid #1A237E;
}

.info-block h3 {
    margin-top: 0;
}

.info-block ol {
    margin: 0 0 12px;
    padding-left: 20px;
    color: #424242;
    font-size: 14px;
}

.info-block ol li {
    margin-bottom: 4px;
}

.info-block p {
    margin: 0;
}

/* Footer */
.site-footer {
    padding: 24px 0;
    background: #eceff1;
    color: #616161;
    border-top: 1px solid #cfd8dc;
    margin-top: auto;
}

.site-footer small {
    font-size: 12px;
    line-height: 1.7;
    display: block;
}

/* Мобилка */
@media (max-width: 640px) {
    .container {
        padding: 0 16px;
    }

    .card,
    .auth-card {
        padding: 24px 20px;
    }

    .form-row.two-cols {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 22px;
    }
}