:root {
    --bg: #f4efe7;
    --bg-accent: #efe3cd;
    --surface: rgba(255, 250, 242, 0.88);
    --surface-strong: #fffaf2;
    --surface-soft: rgba(255, 247, 235, 0.72);
    --text-color: #1e1f1d;
    --muted-text-color: #5f615c;
    --navy: #1f3140;
    --navy-soft: #324d63;
    --gold: #c68b2c;
    --gold-soft: #e7bf77;
    --gold-pale: #f1ddae;
    --line: rgba(31, 49, 64, 0.12);
    --shadow: 0 24px 60px rgba(37, 42, 48, 0.14);
    --success-color: #166534;
    --info-color: #1d4ed8;
    --error-color: #991b1b;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text-color);
    font-family: Georgia, "Times New Roman", serif;
    background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.9), transparent 24%),
        radial-gradient(circle at 82% 18%, rgba(198, 139, 44, 0.2), transparent 20%),
        linear-gradient(180deg, #f7f0e5 0%, #efe5d5 52%, #f4efe7 100%);
}

a {
    color: inherit;
    text-decoration: none;
}

.auth-nav {
    width: 100%;
    margin: 0;
    padding: 18px max(16px, calc((100vw - 1200px) / 2)) 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    position: sticky;
    top: 0;
    z-index: 10;
    border-top: 0;
    border-right: 4px solid #12212d;
    border-bottom: 4px solid #12212d;
    border-left: 4px solid #12212d;
    background: linear-gradient(180deg, rgba(17, 29, 39, 0.96), rgba(31, 49, 64, 0.94));
    backdrop-filter: blur(12px);
    box-shadow: 0 18px 40px rgba(31, 49, 64, 0.18);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: #fff7eb;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.brand-mark {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--gold), var(--gold-soft));
    color: #2c2215;
    font-size: 22px;
}

.nav-links {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    color: #ecf4fb;
}

.nav-links a,
.nav-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 11px 16px;
    border: 2px solid transparent;
    background: rgba(255, 255, 255, 0.06);
    color: inherit;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.nav-links a:hover,
.nav-button:hover {
    transform: translateY(-2px);
    border-color: rgba(231, 191, 119, 0.45);
    color: #fff7eb;
}

.nav-form {
    margin: 0;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0;
    padding: 0;
    background: transparent;
    border: none;
    color: #ecf4fb;
}

.auth-shell {
    min-height: calc(100vh - 78px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 38px 16px 48px;
}

.settings-shell {
    align-items: flex-start;
}

.auth-panel {
    width: min(460px, 100%);
    padding: 34px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(255, 250, 242, 0.94), rgba(245, 230, 205, 0.8));
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    animation: fadeIn 0.8s ease;
}

.settings-panel {
    width: min(980px, 100%);
}

.settings-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(31, 49, 64, 0.08);
    border: 1px solid rgba(31, 49, 64, 0.12);
    font-family: "Trebuchet MS", "Segoe UI", sans-serif;
    font-weight: 700;
    color: var(--navy);
    transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.back-link:hover {
    transform: translateY(-1px);
    background: rgba(31, 49, 64, 0.12);
    border-color: rgba(31, 49, 64, 0.18);
}

.back-link-arrow {
    font-size: 18px;
    line-height: 1;
}

.lang-switch,
#logoutButton {
    margin-top: 0;
    min-height: 40px;
    padding: 11px 16px;
    font-size: 14px;
    line-height: 1.1;
}

.lang-switch {
    min-width: 58px;
    background: rgba(31, 49, 64, 0.08);
    border: 2px solid rgba(31, 49, 64, 0.18);
    color: var(--navy);
}

.lang-switch:hover {
    color: var(--navy);
    background: rgba(31, 49, 64, 0.12);
    border-color: rgba(31, 49, 64, 0.18);
    box-shadow: none;
}

#logoutButton {
    color: #fff7eb;
}

.settings-grid {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h1,
h2 {
    margin-top: 0;
    color: #182029;
}

h1 {
    margin-bottom: 10px;
    line-height: 0.98;
    letter-spacing: -0.03em;
    font-size: clamp(2.2rem, 4vw, 3.6rem);
}

h2 {
    margin-bottom: 10px;
    font-size: 1.55rem;
}

.muted,
.field-hint {
    font-family: "Trebuchet MS", "Segoe UI", sans-serif;
    line-height: 1.6;
    color: var(--muted-text-color);
}

.muted {
    margin: 0 0 20px;
    font-size: 17px;
}

form {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 18px;
    padding: 24px;
    border-radius: 10px;
    background: var(--surface-soft);
    border: 1px solid rgba(31, 49, 64, 0.1);
}

label {
    margin-top: 8px;
    font-size: 14px;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: 0.03em;
}

input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid rgba(31, 49, 64, 0.16);
    border-radius: 0;
    font: inherit;
    background: rgba(255, 255, 255, 0.86);
    color: var(--text-color);
}

input:focus {
    outline: 2px solid rgba(198, 139, 44, 0.28);
    border-color: rgba(198, 139, 44, 0.55);
}

.field-hint {
    margin: 0;
    font-size: 13px;
}

button {
    margin-top: 14px;
    min-height: 50px;
    padding: 12px 18px;
    border: none;
    border-radius: 0;
    background: linear-gradient(135deg, var(--gold), var(--gold-soft));
    color: #2d2418;
    cursor: pointer;
    font-size: 16px;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(31, 49, 64, 0.16);
}

button:active {
    transform: scale(0.98);
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.button-row button {
    flex: 1 1 180px;
}

.secondary-button {
    background: linear-gradient(135deg, var(--navy), var(--navy-soft));
    color: #f9fbfd;
}

.message {
    margin: 0 0 14px;
    padding: 12px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}

.message.error {
    color: var(--error-color);
    background: rgba(254, 226, 226, 0.92);
}

.message.success {
    color: var(--success-color);
    background: rgba(220, 252, 231, 0.92);
}

.message.info {
    color: var(--info-color);
    background: rgba(219, 234, 254, 0.92);
}

.qr-panel {
    display: flex;
    justify-content: center;
    margin: 8px 0 6px;
    padding: 18px;
    border-radius: 10px;
    background: rgba(255, 250, 242, 0.72);
    border: 1px solid rgba(31, 49, 64, 0.12);
}

.qr-code {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 220px;
    min-height: 220px;
    padding: 10px;
    border-radius: 8px;
    background: #ffffff;
    color: var(--muted-text-color);
    text-align: center;
}

.qr-code img {
    display: block;
}

@media (max-width: 760px) {
    .auth-nav {
        position: static;
        padding: 18px 16px;
        border-left-width: 0;
        border-right-width: 0;
        flex-direction: column;
        align-items: flex-start;
    }

    .brand {
        width: 100%;
        font-size: 16px;
    }

    .nav-links {
        width: 100%;
    }

    .nav-links a,
    .nav-button {
        padding: 10px 14px;
    }

    .settings-topbar {
        align-items: stretch;
    }

    .back-link,
    .lang-switch {
        width: 100%;
        justify-content: center;
    }

    .auth-shell {
        padding: 22px 12px 28px;
    }

    .auth-panel {
        padding: 24px 18px;
    }

    form {
        padding: 18px;
    }
}