:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #f5f7fb;
    --sidebar: #eef4ff;
    --card: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow-y: scroll;
    scrollbar-gutter: stable;
}

input[type="number"] {
    appearance: textfield;
    -moz-appearance: textfield;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    appearance: none;
    -webkit-appearance: none;
    margin: 0;
}

.hidden {
    display: none !important;
}

@keyframes page-enter {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.container {
    display: flex;
    min-height: 100vh;
    animation: page-enter 260ms ease both;
}

.sidebar {
    width: 240px;
    background: var(--sidebar);
    padding: 24px;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 10;
}

.logo {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 28px;
    min-height: 112px;
}

.logo-mark {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #ffffff, #eaf2ff);
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.16);
    flex-shrink: 0;
    overflow: hidden;
    transition: none !important;
    animation: none !important;
}

.logo-image {
    width: 92px;
    height: 92px;
    border-radius: 70%;
    object-fit: cover;
    object-position: center;
    display: block;
    flex-shrink: 0;
    opacity: 1;
    transition: none !important;
    animation: none !important;
}

.logo h3 {
    font-size: 16px;
    margin-bottom: 4px;
}

.logo p {
    font-size: 12px;
    color: var(--muted);
    line-height: 1.4;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 30px;
    flex: 1;
    width: 100%;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border-radius: 18px;
    text-decoration: none;
    color: #475569;
    font-size: 15px;
    font-weight: 500;
    transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    background-color: transparent;
    min-height: 48px;
    width: 100%;
}

.nav-item:hover,
.nav-item.active {
     background-color: #eff6ff;
    color: #1d4ed8;
     background-color: #ffffff;
    color: #2563eb;
    font-weight: 700;
    box-shadow: 0 14px 30px rgba(37, 99, 235, 0.08);
}
.nav-item .icon {
    font-size: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 12px;
    background-color: rgba(37, 99, 235, 0.08);
    color: #2563eb;
}


.main-content {
    margin-left: 240px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.header {
    background: #ffffff;
    border-bottom: 1px solid var(--border);
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.header h1 {
    font-size: 24px;
}

.login-btn,
.primary-btn,
.secondary-btn {
    border: none;
    border-radius: 10px;
    padding: 10px 16px;
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s ease, background 0.2s ease;
}

.login-btn,
.primary-btn {
    background: var(--primary);
    color: white;
}

.secondary-btn {
    background: #e2e8f0;
    color: var(--text);
}

.login-btn:hover,
.primary-btn:hover,
.secondary-btn:hover {
    transform: translateY(-1px);
}

.content-wrapper {
    display: flex;
    gap: 24px;
    padding: 24px 30px 32px;
}

.request-section {
    flex: 1;
}

.section-intro {
    margin-bottom: 18px;
}

.section-intro h2 {
    font-size: 22px;
    margin-bottom: 6px;
}

.section-intro p {
    color: var(--muted);
}

.request-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.form-card,
.summary-card,
.availability-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 20px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.form-card h3,
.summary-card h3 {
    font-size: 16px;
    margin-bottom: 14px;
}

label {
    display: flex;
    flex-direction: column;
    gap: 7px;
    font-size: 14px;
    font-weight: 600;
    color: var(--muted);
    margin-bottom: 12px;
}

.room-capacity-hint {
    margin: -7px 0 12px;
    color: var(--muted);
    font-size: 13px;
}

.room-capacity-hint[data-has-capacity="true"] {
    color: var(--primary-dark);
    font-weight: 700;
}

.request-date-row {
    display: grid;
    grid-template-columns: minmax(150px, 0.85fr) minmax(0, 1.15fr);
    align-items: end;
    gap: 14px;
}

.request-deadline-note {
    margin: 0 0 12px;
    padding: 10px 12px;
    border: 1px solid #fecaca;
    border-radius: 8px;
    background: #fff7f7;
    color: #b42318;
    font-size: 12px;
    line-height: 1.45;
}

.request-deadline-note strong {
    font-weight: 700;
}

input,
select,
textarea {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 12px;
    font: inherit;
    color: var(--text);
    background: #fbfdff;
}

input:focus,
select:focus,
textarea:focus {
    outline: 2px solid rgba(37, 99, 235, 0.18);
    border-color: var(--primary);
}

.inline-fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.event-date-fields label {
    min-width: 0;
}

.equipment-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 12px;
}

.equipment-options label {
    flex-direction: row;
    align-items: center;
    padding: 8px 10px;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 999px;
    margin-bottom: 0;
    font-weight: 500;
}

.equipment-option {
    display: grid !important;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 8px;
    width: 100%;
    border-radius: 10px !important;
}

.equipment-option span {
    color: var(--text);
    font-weight: 600;
}

.equipment-option small {
    padding: 3px 7px;
    border-radius: 999px;
    color: #166534;
    background: #dcfce7;
    font-size: 11px;
    font-weight: 700;
}

.equipment-option.equipment-unavailable {
    opacity: 0.68;
}

.equipment-option.equipment-unavailable small {
    color: #92400e;
    background: #fef3c7;
}

.equipment-loading {
    padding: 10px 12px;
    border-radius: 10px;
    color: var(--muted);
    background: #f8fafc;
    font-size: 13px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.request-success-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    z-index: 120;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: start;
    gap: 5px;
    width: min(390px, calc(100vw - 32px));
    padding: 16px 18px;
    border: 1px solid #22c55e !important;
    border-radius: 10px;
    background: #16a34a !important;
    color: #ffffff !important;
    box-shadow: 0 14px 30px rgba(22, 163, 74, 0.24) !important;
    transform: translate(-50%, -50%);
    animation: request-success-enter 180ms ease-out both;
}

.request-success-popup[hidden] {
    display: none;
}

.request-success-popup strong {
    font-size: 15px;
}

.request-success-popup span {
    grid-column: 1;
    font-size: 13px;
    line-height: 1.45;
}

.request-success-dismiss {
    grid-column: 2;
    grid-row: 1 / span 2;
    border: 0;
    padding: 0 0 0 10px;
    background: transparent;
    color: inherit;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
}

.request-success-dismiss:focus-visible {
    outline: 2px solid #ffffff;
    outline-offset: 3px;
}

@keyframes request-success-enter {
    from { opacity: 0; transform: translate(-50%, calc(-50% - 8px)); }
    to { opacity: 1; transform: translate(-50%, -50%); }
}

.availability-card {
    margin-top: 8px;
}

.availability-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.availability-header p {
    color: var(--muted);
    font-size: 13px;
}

.availability-filters {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(150px, 210px);
    gap: 10px;
    margin-bottom: 12px;
}

.availability-search {
    display: block;
    min-width: 0;
}

.availability-search input,
.availability-status-filter select {
    width: 100%;
    height: 42px;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0 13px;
    background: #fbfdff;
    color: var(--text);
    font-size: 14px;
}

.availability-search input:focus,
.availability-status-filter select:focus {
    outline: 2px solid rgba(37, 99, 235, 0.18);
    border-color: var(--primary);
}

.availability-status-filter {
    display: block;
    min-width: 0;
}

.availability-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.availability-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid transparent;
    border-radius: 12px;
    background: #f8fafc;
    cursor: pointer;
    transition: border-color 180ms ease, background-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.availability-item:hover:not([aria-disabled="true"]) {
    transform: translateY(-1px);
}

.availability-item.is-selected {
    border-color: var(--primary);
    background: #eff6ff;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.12);
}

.availability-item[aria-disabled="true"] {
    cursor: not-allowed;
}

.availability-item:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.availability-item strong {
    display: block;
    color: var(--text);
}

.availability-room-info {
    display: grid;
    gap: 4px;
}

.availability-room-info span {
    color: var(--muted);
    font-size: 13px;
}

.availability-status {
    padding: 5px 9px;
    border-radius: 999px;
    background: #dcfce7;
    color: #166534;
    font-size: 12px;
    font-weight: 700;
    text-transform: capitalize;
}

.availability-status.occupied {
    background: #fee2e2;
    color: #b42318;
}

.availability-status.maintenance {
    background: #fef3c7;
    color: #92400e;
}

.availability-period-status {
    color: var(--muted);
    font-size: 12px;
    font-weight: 600;
}

.availability-period-status.conflict {
    color: #b42318;
}

.availability-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 8px;
}

.view-schedule-button {
    border: 0;
    cursor: pointer;
    padding: 6px 9px;
    border-radius: 8px;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
}

.approved-schedules-dialog {
    position: fixed;
    top: 50dvh;
    left: 50vw;
    right: auto;
    bottom: auto;
    margin: 0;
    transform: translate(-50%, -50%);
    width: min(560px, calc(100% - 32px));
    max-width: 560px;
    max-height: min(80vh, 720px);
    max-height: min(80dvh, 720px);
    overflow: auto;
    padding: 0;
    border: 0;
    border-radius: 14px;
    color: var(--text);
    background: #ffffff;
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.28);
}

.approved-schedules-dialog::backdrop {
    background: rgba(15, 23, 42, 0.55);
}

.approved-schedules-panel {
    display: grid;
    gap: 14px;
    padding: 22px;
}

.approved-schedules-panel h3,
.approved-schedules-panel p {
    margin: 0;
}

.approved-schedules-panel h3 {
    line-height: 1.35;
    overflow-wrap: anywhere;
}

.approved-schedules-list {
    display: grid;
    gap: 10px;
    max-height: 50vh;
    overflow-y: auto;
}

.approved-schedule-entry {
    display: grid;
    gap: 4px;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #f8fafc;
}

.approved-schedule-entry span,
.approved-schedules-panel p {
    color: var(--muted);
    font-size: 13px;
}

.approved-schedules-close {
    justify-self: end;
    padding: 8px 14px;
    border: 0;
    border-radius: 8px;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    cursor: pointer;
}

@media (max-width: 600px) {
    .availability-filters {
        grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
        gap: 8px;
    }

    .approved-schedules-dialog {
        width: calc(100% - 24px);
        max-width: 560px;
        max-height: calc(100vh - 24px);
        max-height: calc(100dvh - 24px);
        border-radius: 12px;
    }

    .approved-schedules-panel {
        gap: 12px;
        padding: 18px 16px;
    }

    .approved-schedules-list {
        max-height: calc(100vh - 200px);
        max-height: calc(100dvh - 200px);
    }

    .approved-schedule-entry {
        overflow-wrap: anywhere;
    }

    .approved-schedules-close {
        min-height: 44px;
        min-width: 88px;
    }
}

.placeholder-item {
    justify-content: flex-start;
    color: var(--muted);
    font-size: 14px;
}

.form-message {
    min-height: 24px;
    font-weight: 600;
    color: #b42318;
}

.form-message:empty {
    display: none;
}

.form-message:not(:empty) {
    position: fixed;
    top: 50vh;
    top: 50dvh;
    left: 50vw;
    right: auto;
    bottom: auto;
    z-index: 110;
    display: grid;
    place-items: center;
    width: min(390px, calc(100% - 32px));
    margin: 0;
    min-height: 0;
    padding: 18px 20px;
    border: 1px solid transparent;
    border-radius: 12px;
    color: #ffffff !important;
    text-align: center;
    line-height: 1.5;
    transform: translate(-50%, -50%) !important;
}

.form-message.is-error:not(:empty),
.form-message.capacity-error:not(:empty) {
    border-color: #b42318;
    background: #b42318;
    box-shadow: 0 18px 48px rgba(180, 35, 24, 0.3);
}

.form-message.is-success:not(:empty) {
    border-color: #22c55e;
    background: #16a34a;
    box-shadow: 0 18px 48px rgba(22, 163, 74, 0.28);
}

.request-summary {
    width: 320px;
    flex-shrink: 0;
    position: sticky;
    top: 20px;
    align-self: flex-start;
}

.summary-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.summary-card li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid #f1f5f9;
}

.summary-card span {
    color: var(--muted);
}

.summary-card strong {
    text-align: right;
    color: var(--text);
}

@media (max-width: 1180px) {
    .content-wrapper {
        flex-direction: column;
    }

    .request-summary {
        width: 100%;
        position: static;
    }
}

@media (prefers-reduced-motion: reduce) {
    .availability-item {
        transition: none;
    }

    .availability-item:hover:not([aria-disabled="true"]) {
        transform: none;
    }
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        position: relative;
        width: 100%;
        height: auto;
        min-height: 0;
        padding: 12px;
        gap: 12px;
        overflow: visible;
    }

    .logo {
        min-height: 0;
        margin-bottom: 0;
    }

    .logo-mark {
        width: 64px;
        height: 64px;
    }

    .logo-image {
        width: 56px;
        height: 56px;
    }

    .nav-menu {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 6px;
        flex: none;
        margin: 0;
    }

    .nav-item {
        min-width: 0;
        min-height: 60px;
        flex-direction: column;
        justify-content: center;
        gap: 4px;
        padding: 8px 4px;
        font-size: 12px;
        text-align: center;
    }

    .nav-item .icon {
        width: 28px;
        height: 28px;
        font-size: 16px;
    }

    .main-content {
        width: 100%;
        min-width: 0;
        margin-left: 0;
    }
}

@media (max-width: 900px) {
    .form-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 720px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        position: static;
        width: 100%;
        height: auto;
        min-height: 0;
        padding: 12px;
        gap: 12px;
        overflow: visible;
    }

    .logo {
        min-height: 0;
        margin-bottom: 0;
    }

    .logo-mark {
        width: 64px;
        height: 64px;
    }

    .logo-image {
        width: 56px;
        height: 56px;
    }

    .nav-menu {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 6px;
        flex: none;
        margin: 0;
    }

    .nav-item {
        min-width: 0;
        min-height: 60px;
        flex-direction: column;
        justify-content: center;
        gap: 4px;
        padding: 8px 4px;
        font-size: 12px;
        text-align: center;
    }

    .nav-item .icon {
        width: 28px;
        height: 28px;
        font-size: 16px;
    }

    .main-content {
        width: 100%;
        min-width: 0;
        margin-left: 0;
    }

    .header {
        align-items: center;
        flex-direction: row;
        justify-content: space-between;
        gap: 10px;
        padding: 16px;
    }

    .header-left {
        width: auto;
        min-width: 0;
        flex: 1 1 auto;
        justify-content: flex-start;
    }

    .header-left h1 {
        font-size: 16px;
        line-height: 1.2;
    }

    .header-right {
        width: auto;
        flex: 0 0 auto;
        justify-content: flex-end;
    }

    .header-right .login-btn {
        padding: 9px 10px;
        font-size: 12px;
        white-space: nowrap;
    }

    .content-wrapper {
        width: 100%;
        min-width: 0;
        gap: 14px;
        padding: 12px;
    }

    .request-section,
    .request-form,
    .request-summary {
        width: 100%;
        min-width: 0;
    }

    .request-summary {
        align-self: stretch;
    }

    .form-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 12px;
    }

    .form-card,
    .summary-card,
    .availability-card {
        min-width: 0;
        padding: 16px;
    }

    .form-card input,
    .form-card select,
    .form-card textarea {
        width: 100%;
        min-width: 0;
    }

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

    .availability-item {
        min-width: 0;
        flex-wrap: wrap;
    }

    .availability-room-info {
        min-width: 0;
        flex: 1 1 150px;
    }

    .availability-status {
        flex: 0 0 auto;
    }

    .form-actions {
        flex-wrap: wrap;
    }

    .form-actions button {
        flex: 1 1 140px;
    }

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

    .request-date-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .availability-item strong,
    .availability-room-info span,
    .summary-card strong,
    .summary-card span {
        word-break: break-word;
        overflow-wrap: anywhere;
    }
}

@media (max-width: 360px) {
    .availability-filters {
        grid-template-columns: minmax(0, 1.2fr) minmax(108px, 0.8fr);
        gap: 6px;
    }

    .availability-search input,
    .availability-status-filter select {
        padding-right: 8px;
        padding-left: 8px;
        font-size: 12px;
    }

    .sidebar,
    .header {
        padding-right: 10px;
        padding-left: 10px;
    }

    .content-wrapper {
        padding: 10px;
    }

    .form-card,
    .summary-card,
    .availability-card {
        padding: 13px;
    }
}