:root {
    --admin-bg: #e6edf7;
    --admin-surface: #ffffff;
    --admin-border: #d3dfef;
    --admin-text: #13213a;
    --admin-muted: #58657b;
    --admin-primary: #1f5ea8;
    --admin-primary-strong: #174980;
    --admin-danger: #c53030;
    --admin-danger-strong: #9b2c2c;
    --admin-success: #1f8f52;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    display: flex;
    flex-direction: column;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--admin-text);
    background: linear-gradient(135deg, #c8d9ef 0%, #dae6f6 56%, #e9f0fa 100%);
    min-height: 100vh;
}

.header {
    background: linear-gradient(180deg, #1a4175 0%, #376faa 44%, #8db5e3 100%);
    color: #ffffff;
    padding: 2rem;
    height: 220px;
    box-sizing: border-box;
    position: relative;
    border-radius: 0 0 24px 24px;
    box-shadow: 0 10px 24px rgba(17, 49, 94, 0.16);
}

.header-nav {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.header-left-links {
    display: inline-flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.55rem;
    width: max-content;
    margin-left: calc(150px - (50vw - 50%));
}

.header-left-top,
.header-left-bottom {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.header-left-bottom {
    width: 100%;
}

.header-left-bottom .home-btn {
    flex: 1 1 0;
}

.header-main {
    max-width: 1200px;
    margin: 0 auto;
}

.header-title-stack {
    position: absolute;
    top: 50%;
    right: 200px;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    text-align: center;
}

.nav-links {
    display: flex;
    gap: 0.8rem;
}

.header-title-stack .nav-links {
    justify-content: center;
    margin-bottom: 0.35rem;
}

.home-btn,
.nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    height: 38px;
    min-height: 38px;
    padding: 0 1.2rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    font-size: 1rem;
    line-height: 1.1;
    font-weight: 500;
    transition: 0.2s ease;
}

.home-btn:hover,
.nav-link:hover {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.26);
}

.header-nav .header-left-links > .a11y-toggle-btn {
    width: 100%;
    box-sizing: border-box;
    margin: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 999px;
    height: 38px;
    min-height: 38px;
    padding: 0 1.2rem;
    font-size: 1rem;
    line-height: 1.1;
    font-weight: 700;
    transition: 0.2s ease;
}

.header-nav .header-left-links > .a11y-toggle-btn:hover,
.header-nav .header-left-links > .a11y-toggle-btn:focus-visible {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.24);
    outline: none;
}

.header h1 {
    margin: 0;
    font-size: clamp(1.9rem, 4vw, 2.7rem);
    line-height: 1.15;
}

.subtitle {
    margin: 0;
    font-size: 1rem;
    opacity: 0.95;
}

.container {
    max-width: 1100px;
    width: 100%;
    margin: 1.5rem auto 1.2rem;
    padding: 0 1rem;
    display: grid;
    gap: 1rem;
    flex: 1 0 auto;
}

.admin-card {
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: 14px;
    box-shadow: 0 8px 20px rgba(15, 43, 79, 0.08);
    padding: 1rem;
}

.admin-card h2 {
    margin: 0 0 0.8rem;
    font-size: 1.15rem;
    color: #173a67;
}

.card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
}

.items-list {
    display: grid;
    gap: 0.7rem;
}

.item-card {
    border: 1px solid #d6e3f3;
    border-radius: 10px;
    background: #f8fbff;
    padding: 0.75rem;
}

.item-card h3 {
    margin: 0 0 0.45rem;
    font-size: 0.98rem;
    color: #11345f;
}

.item-card p {
    margin: 0.22rem 0;
    color: var(--admin-muted);
    font-size: 0.9rem;
}

.item-actions {
    margin-top: 0.55rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.primary-btn,
.secondary-btn,
.danger-btn {
    border: 0;
    border-radius: 9px;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
}

.primary-btn {
    background: var(--admin-primary);
    color: #fff;
}

.primary-btn:hover {
    background: var(--admin-primary-strong);
}

.secondary-btn {
    background: #edf3fc;
    color: #173a67;
    border: 1px solid #c8d9f0;
}

.secondary-btn:hover {
    background: #dde9f8;
}

.danger-btn {
    background: #ffe7e7;
    color: var(--admin-danger-strong);
    border: 1px solid #f3bebe;
}

.danger-btn:hover {
    background: #ffd8d8;
}

.inline-form {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 0.6rem;
}

#promoteAdminForm {
    grid-template-columns: 1fr auto;
}

#deleteAccountForm {
    grid-template-columns: 1fr auto;
}

.admin-help {
    margin: 0 0 0.7rem;
    color: #425672;
    font-size: 0.92rem;
}

.inline-form input {
    border: 1px solid #c7d7ec;
    border-radius: 10px;
    padding: 0.62rem 0.72rem;
    font: inherit;
}

.inline-form input:focus {
    outline: 2px solid rgba(31, 94, 168, 0.18);
    border-color: var(--admin-primary);
}

.empty-state {
    margin: 0;
    border: 1px dashed #c4d4ea;
    border-radius: 10px;
    background: #f8fbff;
    color: #4f5e73;
    font-weight: 600;
    padding: 0.8rem;
}

.footer {
    margin-top: auto;
    padding: 0.7rem 1rem;
    text-align: center;
    color: #ffffff;
    background: linear-gradient(135deg, #1f5ea8, #2f7ed1);
    border-top: 1px solid rgba(255, 255, 255, 0.3);
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
}

@media (max-width: 900px) {
    .header {
        height: auto;
        min-height: 220px;
    }

    .header-nav {
        flex-direction: column;
        gap: 0.6rem;
    }

    .header-left-links {
        margin-left: 0;
        width: 100%;
        align-items: center;
        justify-content: center;
    }

    .header-left-top,
    .header-left-bottom {
        justify-content: center;
        flex-wrap: wrap;
    }

    .header-nav .header-left-links > .a11y-toggle-btn {
        width: auto;
    }

    .header-title-stack {
        position: static;
        transform: none;
        gap: 0.3rem;
    }

    .header-title-stack .nav-links {
        justify-content: center;
        flex-wrap: wrap;
        margin-bottom: 0.15rem;
    }

    .inline-form {
        grid-template-columns: 1fr;
    }
}