:root {
    --bg: #f7f8fc;
    --panel: #ffffff;
    --line: #dbe4ee;
    --text: #23364a;
    --muted: #6b7f93;
    --accent: #0b74c7;
    --accent-soft: #e8f3ff;
    --accent-strong: #055a9c;
    --accent-warm: #ffb347;
    --accent-warm-soft: #fff1da;
    --sun: #ffd86b;
    --danger: #c74242;
    --danger-soft: #fde8e8;
    --success: #2d9d5a;
    --success-soft: #e9f7ef;
    --warning: #a46f08;
    --warning-soft: #fff2d8;
    --shadow: 0 12px 30px rgba(35, 54, 74, 0.08);
    --radius: 14px;
    --radius-small: 10px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at top right, rgba(255, 216, 107, 0.24), transparent 22%),
        radial-gradient(circle at top left, rgba(11, 116, 199, 0.12), transparent 28%),
        linear-gradient(180deg, #eef6ff 0%, #f8fbff 180px, var(--bg) 100%);
    color: var(--text);
}

body.plan-only-mode {
    background:
        radial-gradient(circle at top right, rgba(255, 216, 107, 0.18), transparent 24%),
        linear-gradient(180deg, #eef6ff 0%, #f8fbff 100%);
}

a {
    color: var(--accent);
}

code {
    background: #eef3f6;
    padding: 0.12rem 0.35rem;
    border-radius: 6px;
}

.page {
    width: min(1180px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 1rem 0 3rem;
}

.page-plan-only {
    width: calc(100% - 1rem);
    max-width: none;
    min-height: 100vh;
    padding-bottom: 1rem;
}

.hero,
.panel {
    background: var(--panel);
    border: 1px solid rgba(0, 130, 201, 0.08);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero {
    padding: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
    background:
        radial-gradient(circle at top right, rgba(255, 216, 107, 0.22), transparent 28%),
        linear-gradient(135deg, rgba(11, 116, 199, 0.1), rgba(11, 116, 199, 0.02) 42%, #ffffff 72%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 6px;
    background: linear-gradient(90deg, var(--accent) 0%, #2693e6 58%, var(--accent-warm) 100%);
}

.hero-plan-only {
    padding: 1rem 1.25rem;
}

.eyebrow {
    margin: 0 0 0.35rem;
    color: var(--accent);
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-size: 0.82rem;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 0.5rem;
    font-size: clamp(2rem, 4vw, 3rem);
}

h2 {
    margin-bottom: 0.4rem;
    font-size: clamp(1.45rem, 3vw, 2rem);
}

h3 {
    margin-bottom: 0.4rem;
    font-size: 1.05rem;
}

.hero-text,
.section-text,
.meta,
.empty,
.empty-state {
    color: var(--muted);
}

.top-actions,
.button-row,
.status-form,
.status-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.layout {
    display: grid;
    gap: 1rem;
}

.panel {
    padding: 1.25rem;
    position: relative;
    overflow: hidden;
}

.panel::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 4px;
    background: linear-gradient(90deg, rgba(11, 116, 199, 0.24), rgba(255, 179, 71, 0.16), rgba(11, 116, 199, 0.04));
}

.plan-panel {
    overflow: hidden;
}

.page-plan-only .plan-panel {
    min-height: calc(100vh - 8.5rem);
}

.section-heading {
    margin-bottom: 1rem;
    position: relative;
    padding-bottom: 0.35rem;
}

.capacity-text {
    margin: 0.45rem 0 0.9rem;
}

.section-heading::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 72px;
    height: 4px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-warm) 100%);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--accent-strong);
    background: var(--accent);
    color: #fff;
    padding: 0.78rem 1rem;
    border-radius: var(--radius-small);
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.28) inset, 0 6px 14px rgba(11, 116, 199, 0.16);
}

.button:hover,
.button:focus-visible {
    background: var(--accent-strong);
}

.button[aria-current="true"] {
    box-shadow: inset 0 0 0 2px rgba(24, 48, 67, 0.18);
}

.button-secondary {
    background: #fff;
    color: var(--accent);
    border-color: var(--line);
}

.button-secondary:hover,
.button-secondary:focus-visible {
    background: linear-gradient(180deg, #ffffff 0%, var(--accent-soft) 100%);
    color: var(--accent-strong);
}

.button-danger {
    background: var(--danger);
    border-color: var(--danger);
}

.button-danger:hover,
.button-danger:focus-visible {
    background: #a92f2f;
}

.button-small {
    padding: 0.48rem 0.72rem;
    font-size: 0.86rem;
    border-radius: 8px;
}

.notice {
    margin-bottom: 1rem;
    padding: 0.9rem 1rem;
    border-radius: var(--radius-small);
    border: 1px solid transparent;
}

.notice-success {
    background: linear-gradient(180deg, #f3fbf6 0%, var(--success-soft) 100%);
    border-color: rgba(33, 111, 79, 0.18);
}

.notice-error {
    background: linear-gradient(180deg, #fff7f7 0%, var(--danger-soft) 100%);
    border-color: rgba(164, 60, 52, 0.2);
}

.notice-warning {
    background: linear-gradient(180deg, #fff9ef 0%, var(--warning-soft) 100%);
    border-color: rgba(123, 90, 19, 0.2);
}

.plan-table-wrap {
    overflow-x: auto;
    overflow-y: auto;
    max-width: 100%;
}

.plan-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

.page-plan-only .plan-table-wrap {
    max-height: calc(100vh - 16rem);
}

.plan-table th,
.plan-table td {
    border: 1px solid var(--line);
    padding: 0.8rem;
    vertical-align: top;
    background: #fff;
}

.plan-table td {
    position: relative;
}

.plan-table thead th {
    background: linear-gradient(180deg, #f7fbff 0%, #eaf4ff 100%);
    text-align: left;
    position: sticky;
    top: 0;
    z-index: 4;
}

.plan-table tbody th {
    background: linear-gradient(180deg, #fbfdff 0%, #f3f8fd 100%);
    width: 108px;
    min-width: 108px;
    text-align: left;
    position: sticky;
    left: 0;
    z-index: 3;
}

.plan-table thead th:first-child {
    left: 0;
    z-index: 5;
}

.session-card {
    min-height: 72px;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    padding-bottom: 3.2rem;
}

.session-card h3 {
    font-size: 1rem;
    line-height: 1.1;
    margin-bottom: 0;
}

.page-plan-only .plan-table th,
.page-plan-only .plan-table td {
    padding: 0.65rem;
}

.page-plan-only .session-card {
    min-height: 0;
}

.page-plan-only .session-card h3 {
    font-size: 0.9rem;
}

.page-plan-only .meta {
    font-size: 0.82rem;
    margin-bottom: 0.35rem;
}

.mobile-room-card {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    position: relative;
    padding-bottom: 3.2rem;
}

.mobile-room-card strong,
.mobile-room-card span {
    margin: 0;
}

.plan-cell-admin {
    transition: background-color 120ms ease, box-shadow 120ms ease;
}

.plan-cell-admin.drop-active {
    background: linear-gradient(180deg, #f1fbf4 0%, #e8f6ee 100%);
    box-shadow: inset 0 0 0 2px rgba(33, 111, 79, 0.28);
}

.plan-cell-admin.drop-blocked {
    background: linear-gradient(180deg, #fff4f2 0%, #fbe9e6 100%);
    box-shadow: inset 0 0 0 2px rgba(164, 60, 52, 0.22);
}

.drop-hint {
    display: block;
    margin-top: 0.45rem;
    font-size: 0.84rem;
    color: var(--muted);
}

.session-actions {
    position: absolute;
    right: 0.8rem;
    bottom: 0.8rem;
    display: inline-flex;
    gap: 0.45rem;
    align-items: center;
}

.icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.3rem;
    height: 2.3rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
    color: var(--accent);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(35, 54, 74, 0.05);
}

.icon-button:hover,
.icon-button:focus-visible {
    background: var(--accent-soft);
}

.icon-button-info {
    font-weight: 800;
    font-size: 1.05rem;
}

.top-action-icon {
    width: 2.8rem;
    height: 2.8rem;
    font-size: 1.2rem;
    flex: 0 0 auto;
}

.session-link {
    position: absolute;
    left: 0.8rem;
    bottom: 0.8rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.3rem;
    padding: 0.45rem 0.8rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
    color: var(--accent);
    font-size: 0.92rem;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(35, 54, 74, 0.05);
}

.session-link:hover,
.session-link:focus-visible {
    background: var(--accent-soft);
}

.page-plan-only .session-link {
    min-height: 2rem;
    padding: 0.35rem 0.7rem;
    font-size: 0.85rem;
}

.page-plan-only .icon-button {
    width: 2rem;
    height: 2rem;
    font-size: 0.9rem;
}

.plan-mobile .session-actions,
.plan-mobile .session-link {
    position: static;
}

.plan-mobile .session-actions {
    display: flex;
}

.info-button:hover,
.info-button:focus-visible {
    background: var(--accent-soft);
}

.proposal-list,
.admin-stack {
    display: grid;
    gap: 1rem;
}

.proposal-card,
.admin-card,
.mobile-room-card {
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 1rem;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(246, 250, 255, 0.98) 100%);
    box-shadow: 0 8px 18px rgba(35, 54, 74, 0.04);
}

.proposal-list-compact {
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.proposal-card-compact {
    padding: 0.85rem;
}

.proposal-card-compact h3 {
    font-size: 0.98rem;
}

.proposal-card-compact.is-draggable {
    cursor: grab;
}

.proposal-card-compact.is-dragging {
    opacity: 0.45;
}

.compact-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 0.9rem;
}

.drag-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    background: linear-gradient(180deg, #fff7e9 0%, var(--accent-warm-soft) 100%);
    color: #9a6500;
    border: 1px solid rgba(255, 179, 71, 0.35);
    font-size: 0.82rem;
    font-weight: 700;
}

.proposal-head {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
}

.badge-stack {
    display: flex;
    gap: 0.45rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    white-space: nowrap;
}

.badge-open {
    background: linear-gradient(180deg, #f2f8ff 0%, var(--accent-soft) 100%);
    color: var(--accent);
}

.badge-accepted {
    background: linear-gradient(180deg, #f3fbf6 0%, var(--success-soft) 100%);
    color: var(--success);
}

.badge-rejected {
    background: linear-gradient(180deg, #fff7f7 0%, var(--danger-soft) 100%);
    color: var(--danger);
}

.badge-type-offer {
    background: linear-gradient(180deg, #eef8ff 0%, #dceeff 100%);
    color: var(--accent-strong);
}

.badge-type-wish {
    background: linear-gradient(180deg, #fff9ef 0%, var(--accent-warm-soft) 100%);
    color: #9a6500;
}

.proposal-meta {
    display: grid;
    gap: 0.7rem;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    margin-bottom: 0;
}

.proposal-meta dt {
    font-weight: 700;
    font-size: 0.92rem;
}

.proposal-meta dd {
    margin: 0.25rem 0 0;
    color: var(--muted);
}

.modal-open {
    overflow: hidden;
}

.modal[hidden] {
    display: none;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(24, 48, 67, 0.5);
}

.modal-dialog {
    position: relative;
    width: min(680px, calc(100% - 1.5rem));
    max-height: calc(100vh - 2rem);
    overflow: auto;
    margin: 1rem auto;
    padding: 1.25rem;
    border-radius: 14px;
    background:
        radial-gradient(circle at top right, rgba(255, 216, 107, 0.16), transparent 22%),
        linear-gradient(180deg, #ffffff 0%, #f9fbff 100%);
    box-shadow: 0 25px 60px rgba(24, 48, 67, 0.25);
    border: 1px solid rgba(0, 130, 201, 0.1);
}

.modal-close {
    position: absolute;
    top: 0.8rem;
    right: 0.8rem;
    width: 2.25rem;
    height: 2.25rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #fff;
    color: var(--text);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
}

.modal-location {
    font-weight: 700;
}

.modal-description {
    white-space: pre-wrap;
    line-height: 1.5;
}

.proposal-confirm-list {
    display: grid;
    gap: 0.8rem;
    margin: 1rem 0 1.25rem;
}

.proposal-confirm-list dt {
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.proposal-confirm-list dd {
    margin: 0;
    color: var(--muted);
    white-space: pre-wrap;
}

form {
    margin: 0;
}

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

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

label,
label span {
    display: block;
}

label span {
    margin-bottom: 0.45rem;
    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;
    padding: 0.85rem 0.95rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    color: var(--text);
    font: inherit;
}

input:hover,
select:hover,
textarea:hover {
    border-color: #a9c7e2;
    background: #fcfeff;
}

input:focus,
select:focus,
textarea:focus,
.button:focus-visible,
.icon-button:focus-visible,
.session-link:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(11, 116, 199, 0.16), 0 0 0 7px rgba(255, 216, 107, 0.16);
}

textarea {
    resize: vertical;
}

.proposal-form,
.admin-form,
.login-form {
    display: grid;
    gap: 1rem;
}

.settings-tools {
    margin-top: 1.25rem;
    display: grid;
    gap: 1rem;
}

.import-form {
    padding-top: 1rem;
    border-top: 1px solid var(--line);
}

.admin-panel {
    border-color: rgba(31, 111, 139, 0.25);
}

.admin-state {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.hp-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.plan-mobile {
    display: none;
}

.mobile-slot {
    margin-top: 1rem;
}

.mobile-slot-grid {
    display: grid;
    gap: 0.75rem;
}

.mobile-room-title {
    margin-bottom: 0.45rem;
    font-weight: 700;
}

.mobile-room-actions {
    margin-top: 0.9rem;
}

@media (max-width: 860px) {
    .hero {
        flex-direction: column;
    }

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

    .form-grid .full {
        grid-column: auto;
    }

    .proposal-list-compact {
        grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    }
}

@media (max-width: 720px) {
    .page {
        width: min(100% - 1rem, 100%);
    }

    .panel,
    .hero {
        padding: 1rem;
    }

    .plan-table-wrap {
        display: none;
    }

    .plan-mobile {
        display: block;
    }

    .page-plan-only .plan-panel {
        min-height: auto;
    }

    h1 {
        font-size: clamp(1.8rem, 9vw, 2.4rem);
    }

    h2 {
        font-size: clamp(1.35rem, 7vw, 1.8rem);
    }

    .top-actions {
        width: 100%;
    }

    .top-actions .button {
        flex: 1 1 100%;
    }

    .proposal-list-compact {
        grid-template-columns: 1fr;
    }

    .compact-actions {
        align-items: stretch;
    }

    .compact-actions .status-form {
        flex: 1 1 auto;
    }

    .compact-actions .button {
        width: 100%;
    }
}

@media (max-width: 560px) {
    .hero,
    .panel {
        border-radius: 14px;
    }

    .session-card,
    .mobile-room-card {
        padding-bottom: 3.5rem;
    }

    .session-actions {
        right: 0.65rem;
        bottom: 0.65rem;
        gap: 0.35rem;
    }

    .session-link {
        left: 0.65rem;
        bottom: 0.65rem;
        min-height: 2rem;
        padding: 0.35rem 0.65rem;
        font-size: 0.82rem;
    }

    .icon-button {
        width: 2rem;
        height: 2rem;
    }
}

@media print {
    body {
        background: #fff;
    }

    .page {
        width: 100%;
        padding: 0;
    }

    .hero,
    .panel {
        box-shadow: none;
        border-color: #ccc;
    }

    .top-actions,
    .proposal-form,
    .admin-panel,
    .notice {
        display: none !important;
    }
}