:root {
    --aizu-dark: #1D1D1F;
    --aizu-muted: #6E6E73;
    --aizu-soft: #F5F5F7;
    --aizu-border: #E5E5EA;
    --aizu-gold: #B8943C;
    --aizu-gold-soft: #F1EFE8;
}

body {
    font-family: 'work_sansregular', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(201, 166, 70, 0.16), transparent 28%),
        var(--aizu-soft);
    color: var(--aizu-dark);
    min-height: 100vh;
}

.calendar-shell {
    max-width: 1180px;
    margin: 34px auto;
    padding: 0 18px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
    margin-bottom: 24px;
}

.brand-block {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-block img {
    width: 150px;
    max-height: 48px;
}

.brand-name {
    font-weight: 850;
    font-size: 1.12rem;
    letter-spacing: -0.035em;
}

.brand-subtitle {
    color: var(--aizu-muted);
    font-size: 0.9rem;
    font-weight: 600;
}

.language-switch .dropdown-item.active {
    background: var(--aizu-gold-soft);
    color: var(--aizu-gold);
    font-weight: 800;
}

.page-card {
    border-radius: 30px;
    background:
        linear-gradient(135deg,
            rgba(201, 166, 70, 0.44),
            rgba(255, 255, 255, 0.88),
            rgba(0, 0, 0, 0.06));
    padding: 1px;
    box-shadow:
        0 24px 70px rgba(0, 0, 0, 0.10),
        0 1px 0 rgba(255, 255, 255, 0.9) inset;
}

.page-card-inner {
    background: rgba(255, 255, 255, 0.96);
    border-radius: 29px;
    padding: 30px;
}

.calendar-layout {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 26px;
}

.sidebar {
    background: #FBFBFD;
    border: 1px solid var(--aizu-border);
    border-radius: 24px;
    padding: 14px;
    height: fit-content;
}

.sidebar-title {
    color: var(--aizu-muted);
    font-size: 0.82rem;
    font-weight: 700;
    padding: 8px 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.nav-link-aizu {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--aizu-dark);
    text-decoration: none;
    padding: 11px 12px;
    border-radius: 16px;
    margin-bottom: 4px;
    font-weight: 600;
}

.nav-link-aizu:hover {
    background: var(--aizu-gold-soft);
    color: var(--aizu-dark);
}

.nav-link-aizu.active {
    background: var(--aizu-dark);
    color: #FFFFFF;
}

.nav-link-aizu i {
    width: 18px;
    text-align: center;
    color: inherit;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 22px;
}

.content-title {
    font-size: 2rem;
    letter-spacing: -0.045em;
    font-weight: 750;
    margin: 0;
}

.content-subtitle {
    color: var(--aizu-muted);
    margin: 6px 0 0;
    max-width: 680px;
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    border-radius: 999px;
    padding: 7px 12px;
    background: var(--aizu-gold-soft);
    color: var(--aizu-muted);
    font-size: 0.86rem;
    font-weight: 700;
    white-space: nowrap;
}

.section-card {
    background: #FBFBFD;
    border: 1px solid var(--aizu-border);
    border-radius: 24px;
    padding: 20px;
    margin-bottom: 16px;
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 18px;
}

.section-heading h2 {
    font-size: 1.25rem;
    font-weight: 850;
    letter-spacing: -0.035em;
    margin: 0;
}

.section-heading p {
    color: var(--aizu-muted);
    margin: 4px 0 0;
}

.option-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.option-card {
    border: 1px solid #dee2e6;
    border-radius: 1rem;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    background: #fff;
    height: 100%;
}

.option-card input {
    display: none;
}

.option-card:hover {
    border-color: var(--aizu-gold);
    box-shadow: 0 8px 20px rgba(184, 148, 60, 0.10);
    transform: translateY(-2px);
}

.option-card.active {
    border-color: var(--aizu-gold);
    background: rgba(184, 148, 60, 0.06);
    box-shadow: 0 0 0 0.2rem rgba(184, 148, 60, 0.12);
}

.option-icon {
    width: 42px;
    height: 42px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--aizu-gold-soft);
    color: var(--aizu-gold);
    margin-bottom: 12px;
}

.option-title {
    font-weight: 850;
    margin-bottom: 4px;
}

.option-description {
    color: var(--aizu-muted);
    font-size: 0.9rem;
}

.btn-aizu-dark {
    background: var(--aizu-dark);
    color: #FFFFFF;
    border: none;
    border-radius: 999px;
    min-height: 44px;
    padding: 10px 18px;
    font-weight: 700;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.btn-aizu-dark:hover {
    background: #000000;
    color: #FFFFFF;
}

.btn-aizu-light {
    background: var(--aizu-gold-soft);
    color: var(--aizu-dark);
    border: none;
    border-radius: 999px;
    min-height: 44px;
    padding: 10px 18px;
    font-weight: 700;
}

.btn-aizu-light:hover {
    background: #E8E2D3;
    color: var(--aizu-dark);
}

.input-group-text {
    border-radius: 1rem 0 0 1rem;
    background: #fff;
    min-width: 48px;
    justify-content: center;
}

.form-control,
.form-select {
    border-radius: 1rem;
}

.input-group .form-control,
.input-group .form-select {
    border-radius: 0 1rem 1rem 0;
}

.secure-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.9rem 1rem;
    border: 1px solid #dbeafe;
    background: linear-gradient(90deg, #eff6ff 0%, #f8fafc 100%);
    border-radius: 1rem;
    margin-bottom: 1rem;
}

.secure-banner .left {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.secure-icon {
    width: 42px;
    height: 42px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #dbeafe;
    color: #1d4ed8;
    flex-shrink: 0;
}

.mobile-section-menu {
    display: none;
}

.mobile-section-button {
    width: 100%;
    border: 1px solid var(--aizu-border);
    background: #FFFFFF;
    color: var(--aizu-dark);
    border-radius: 18px;
    padding: 13px 14px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.mobile-section-options {
    display: none;
    margin-top: 8px;
    border: 1px solid var(--aizu-border);
    border-radius: 18px;
    background: #FFFFFF;
    overflow: hidden;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
}

.mobile-section-menu.open .mobile-section-options {
    display: block;
}

.mobile-section-options a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--aizu-dark);
    text-decoration: none;
    padding: 13px 14px;
    border-bottom: 1px solid var(--aizu-border);
    font-weight: 700;
}

.mobile-section-options a:last-child {
    border-bottom: 0;
}

.mobile-section-options a:hover {
    background: var(--aizu-gold-soft);
}

@media (max-width: 900px) {
    .sidebar {
        display: none;
    }

    .mobile-section-menu {
        display: block;
        margin-bottom: 18px;
    }

    .calendar-layout {
        grid-template-columns: 1fr;
    }

    .content-header {
        flex-direction: column;
    }

    .page-card-inner {
        padding: 22px;
    }

    .secure-banner {
        align-items: flex-start;
        flex-direction: column;
    }

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

    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }
}

.state-screen {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
    padding: 3.5rem 1.5rem;
}

.state-icon {
    width: 86px;
    height: 86px;
    border-radius: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.state-icon.error {
    background: rgba(220, 53, 69, .12);
    color: #dc3545;
}

.state-icon.success {
    background: rgba(25, 135, 84, .12);
    color: #198754;
}

.state-icon.warning {
    background: rgba(255, 193, 7, .16);
    color: #b58100;
}

.state-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    margin-bottom: .75rem;
}

.state-text {
    color: #6c757d;
    font-size: 1.05rem;
    max-width: 560px;
    margin: 0 auto 1.75rem;
}

.task-detail-card {
    border: 1px solid rgba(0,0,0,.08);
    border-radius: 24px;
    padding: 1.25rem;
    background: #fff;
    box-shadow: 0 18px 40px rgba(0,0,0,.06);
    text-align: left;
}

.task-detail-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(0,0,0,.06);
}

.task-detail-row:last-child {
    border-bottom: 0;
}

.task-detail-label {
    color: #6c757d;
    font-size: .9rem;
}

.task-detail-value {
    font-weight: 700;
    text-align: right;
}

.locked-banner {
    margin-top: 1rem;
    border-radius: 18px;
    padding: 1rem;
    background: rgba(13, 110, 253, .08);
    color: #0d6efd;
    display: flex;
    align-items: center;
    gap: .75rem;
}