* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, sans-serif;
    background: #f1f3f5;
    color: #1f2937;
}

.login-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 20px;
}

.page-wrap {
    min-height: 100vh;
    padding: 24px;
}

.card {
    width: 100%;
    max-width: 420px;
    background: #ffffff;
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.08);
}

.card-wide {
    max-width: 980px;
    margin: 0 auto;
}

h1 {
    margin: 0 0 6px;
    font-size: 28px;
}

.subtitle {
    margin: 0 0 18px;
    color: #5f6773;
    font-size: 14px;
}

.form {
    display: grid;
    gap: 10px;
}

label {
    font-weight: 600;
    font-size: 14px;
}

input {
    padding: 11px 12px;
    border: 1px solid #d8dce5;
    border-radius: 10px;
    font-size: 15px;
}

select {
    width: 100%;
    padding: 11px 12px;
    border: 1px solid #d8dce5;
    border-radius: 10px;
    font-size: 15px;
    background: #fff;
}

input:focus {
    border-color: #2773ff;
    outline: none;
}

select:focus {
    border-color: #2773ff;
    outline: none;
}

button {
    margin-top: 8px;
    border: none;
    border-radius: 10px;
    padding: 12px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: #2773ff;
    cursor: pointer;
}

button:hover {
    background: #195ee0;
}

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

.alert.success {
    background: #e9f9ee;
    color: #1f6b35;
}

.alert.error {
    background: #ffecef;
    color: #92213a;
}

.form-grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.full-row {
    grid-column: 1 / -1;
}

.checkbox-group {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding: 12px;
    background: #f7f9fd;
    border: 1px solid #e3e8f2;
    border-radius: 12px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.checkbox-group input {
    width: 16px;
    height: 16px;
    padding: 0;
}

.admin-links {
    display: grid;
    gap: 10px;
    margin: 14px 0;
}

.btn-link {
    text-decoration: none;
    display: inline-block;
    padding: 11px 14px;
    border-radius: 10px;
    background: #f0f4ff;
    color: #1847a8;
    font-weight: 600;
}

.btn-link:hover {
    background: #e3ebff;
}

.result-box {
    margin-top: 18px;
    border: 1px solid #dbe2f0;
    border-radius: 12px;
    padding: 14px;
    background: #fbfcff;
}

.result-box h2 {
    margin: 0 0 10px;
    font-size: 22px;
}

.result-box p {
    margin: 6px 0;
}

.result-box .final {
    font-size: 22px;
    font-weight: 800;
    color: #195ee0;
}

.admin-body {
    background: #f1f3f5;
}

.admin-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 250px 1fr;
}

.sidebar {
    background: #1d2327;
    color: #c3c4c7;
    padding: 18px 14px;
    display: flex;
    flex-direction: column;
}

.sidebar-brand {
    display: flex;
    gap: 10px;
    align-items: center;
    padding: 8px 10px 18px;
    border-bottom: 1px solid #2c3338;
}

.brand-dot {
    width: 12px;
    height: 12px;
    border-radius: 99px;
    background: #38bdf8;
}

.sidebar-brand strong {
    display: block;
    color: #fff;
}

.sidebar-brand small {
    color: #9ca3af;
}

.sidebar-nav {
    margin-top: 16px;
    display: grid;
    gap: 4px;
}

.sidebar-link {
    color: #c3c4c7;
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 6px;
    font-weight: 600;
}

.sidebar-link:hover {
    background: #2c3338;
    color: #fff;
}

.sidebar-link.active {
    background: #2271b1;
    color: #fff;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px solid #2c3338;
}

.sidebar-user {
    font-size: 13px;
    margin-bottom: 10px;
}

.sidebar-logout {
    width: 100%;
    margin-top: 0;
    background: #b32d2e;
}

.sidebar-logout:hover {
    background: #8a2424;
}

.work-area {
    display: grid;
    grid-template-rows: auto 1fr;
    min-width: 0;
}

.work-topbar {
    background: #fff;
    border-bottom: 1px solid #dde2e7;
    padding: 20px 26px;
}

.work-topbar h1 {
    margin: 0;
    font-size: 24px;
}

.work-content {
    padding: 24px;
}

.panel {
    background: #fff;
    border: 1px solid #dfe4ea;
    border-radius: 12px;
    padding: 18px;
}

.quick-grid {
    margin-top: 12px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.quick-card {
    text-decoration: none;
    color: inherit;
    border: 1px solid #dbe2ea;
    border-radius: 10px;
    padding: 16px;
    background: linear-gradient(180deg, #ffffff, #f8fafc);
}

.quick-card h3 {
    margin: 0 0 8px;
}

.quick-card p {
    margin: 0;
    color: #4b5563;
}

.page-row {
    display: grid;
    grid-template-columns: 1.4fr 0.7fr auto;
    gap: 10px;
    margin-bottom: 10px;
}

.page-row .remove-page-btn {
    margin-top: 0;
    background: #6b7280;
}

.page-row .remove-page-btn:hover {
    background: #4b5563;
}

@media (max-width: 840px) {
    .admin-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: sticky;
        top: 0;
        z-index: 10;
        padding-bottom: 10px;
    }

    .sidebar-nav {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .sidebar-link {
        text-align: center;
        font-size: 13px;
    }

    .sidebar-footer {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 8px;
    }

    .sidebar-logout {
        width: auto;
        padding: 8px 12px;
    }

    .work-content {
        padding: 14px;
    }

    .quick-grid {
        grid-template-columns: 1fr;
    }

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

    .form-grid-2 {
        grid-template-columns: 1fr;
    }

    .checkbox-group {
        grid-template-columns: 1fr;
    }
}