:root {
    --bg: #f3f6fb;
    --panel: #ffffff;
    --primary: #0f4c81;
    --primary-dark: #0b365c;
    --secondary: #e9f2fb;
    --text: #1d2733;
    --muted: #64748b;
    --border: #d9e3ee;
    --danger: #b42318;
    --success: #027a48;
    --shadow: 0 14px 30px rgba(15, 76, 129, 0.10);
    --radius: 22px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
}

body { min-height: 100vh; }
a { color: inherit; }

.page {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 320px 1fr;
}

.sidebar {
    background: #fff;
    border-right: 1px solid var(--border);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.brand,
.card,
.login-card,
.admin-card {
    background: var(--panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.brand {
    background: linear-gradient(135deg, var(--primary), #1666aa);
    color: #fff;
    padding: 24px;
}

.brand h1 {
    margin: 0 0 8px;
    font-size: 30px;
    line-height: 1.1;
}

.brand p {
    margin: 0;
    font-size: 18px;
    line-height: 1.45;
    opacity: .95;
}

.toggle {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.toggle a,
.btn,
button {
    border: none;
    border-radius: 16px;
    background: var(--primary);
    color: #fff;
    padding: 14px 18px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.toggle a.secondary,
.btn.secondary,
button.secondary {
    background: #fff;
    color: var(--primary-dark);
    border: 2px solid var(--border);
}

.toggle a.active {
    background: var(--primary);
    color: #fff;
}

.menu-title {
    margin: 0;
    font-size: 17px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .05em;
}

.categories {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.category-link {
    display: block;
    text-decoration: none;
    border: 2px solid var(--border);
    background: var(--panel);
    border-radius: 18px;
    padding: 18px;
    color: var(--text);
}

.category-link.active {
    border-color: var(--primary);
    background: #eef6ff;
}

.category-link strong {
    display: block;
    font-size: 20px;
    margin-bottom: 6px;
}

.category-link span {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.4;
}

.main,
.login-page,
.admin-page {
    padding: 28px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.intro h2 {
    margin: 0 0 8px;
    font-size: 36px;
}

.intro p {
    margin: 0;
    font-size: 18px;
    color: var(--muted);
}

.actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-height: 250px;
}

.emoji {
    font-size: 42px;
    line-height: 1;
}

.tag {
    display: inline-block;
    align-self: flex-start;
    background: var(--secondary);
    color: var(--primary-dark);
    border-radius: 999px;
    padding: 8px 14px;
    font-size: 14px;
    font-weight: bold;
}

.card h3 {
    margin: 0;
    font-size: 26px;
    line-height: 1.2;
}

.card p {
    margin: 0;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.5;
    flex: 1;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    width: min(520px, 100%);
    padding: 28px;
}

.admin-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.admin-card {
    padding: 24px;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}

.admin-table th,
.admin-table td {
    border-bottom: 1px solid var(--border);
    padding: 12px 10px;
    text-align: left;
    vertical-align: top;
    font-size: 14px;
}

.admin-table th {
    color: var(--muted);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: .04em;
}

.field,
.field-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

label {
    font-weight: bold;
    font-size: 14px;
}

input,
select,
textarea {
    width: 100%;
    border: 2px solid var(--border);
    border-radius: 14px;
    padding: 14px;
    font-size: 15px;
    font-family: Arial, Helvetica, sans-serif;
    background: #fff;
}

textarea {
    min-height: 110px;
    resize: vertical;
}

.notice,
.error {
    padding: 14px 16px;
    border-radius: 14px;
    margin-bottom: 18px;
    font-size: 15px;
    line-height: 1.4;
}

.notice {
    background: #ecfdf3;
    color: var(--success);
    border: 1px solid #abefc6;
}

.error {
    background: #fef3f2;
    color: var(--danger);
    border: 1px solid #fecdca;
}

.inline-form { display: inline; }

.small-btn {
    padding: 10px 12px;
    font-size: 13px;
    border-radius: 12px;
    background: #fff;
    color: var(--danger);
    border: 2px solid #fecdca;
}

.muted { color: var(--muted); }

@media (max-width: 1100px) {
    .page {
        grid-template-columns: 1fr;
    }

    .sidebar {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
}

@media (max-width: 760px) {
    .main,
    .sidebar,
    .login-page,
    .admin-page {
        padding: 18px;
    }

    .field-row {
        grid-template-columns: 1fr;
    }

    .intro h2 {
        font-size: 28px;
    }

    .card h3 {
        font-size: 22px;
    }
}