:root {
    --bg: #f7f8fb;
    --card: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --primary: #0f766e;
    --primary-dark: #115e59;
    --border: #dbe2ea;
    --error-bg: #fff2f2;
    --error-border: #ffc9c9;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.55;
}

a {
    color: inherit;
}

.container {
    width: min(1120px, 92%);
    margin: 0 auto;
}

.site-header {
    background: linear-gradient(135deg, #0f766e, #0891b2);
    color: #fff;
    padding: 2rem 0;
}

.site-header h1 {
    margin: 0 0 0.35rem;
    font-size: clamp(1.45rem, 3.5vw, 2rem);
}

.site-header p {
    margin: 0;
    color: #d5fbff;
}

main {
    padding: 1.5rem 0 2rem;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.property-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.8rem;
    overflow: hidden;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.06);
}

.property-card img,
.image-placeholder {
    width: 100%;
    height: 190px;
    display: block;
}

.property-card img {
    object-fit: cover;
}

.image-placeholder {
    background: #d2e8ec;
    color: #1f4f58;
    display: grid;
    place-items: center;
    font-weight: 700;
}

.property-card-body {
    padding: 1rem;
}

.property-card-body h2 {
    margin: 0 0 0.3rem;
    font-size: 1.15rem;
}

.property-location {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.btn {
    display: inline-block;
    margin-top: 0.8rem;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    border: 0;
    border-radius: 0.55rem;
    padding: 0.6rem 0.9rem;
    cursor: pointer;
    font-size: 0.95rem;
}

.btn:hover,
.btn:focus {
    background: var(--primary-dark);
}

.alert {
    background: #eef6ff;
    border: 1px solid #bfdbfe;
    border-radius: 0.7rem;
    padding: 1rem;
}

.alert h2 {
    margin-top: 0;
}

.alert-error {
    background: var(--error-bg);
    border-color: var(--error-border);
}

.property-intro {
    margin-bottom: 1rem;
}

.embed-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.8rem;
    padding: 0.9rem;
    margin-bottom: 1rem;
}

.embed-card h3 {
    margin: 0 0 0.45rem;
}

.embed-card p {
    margin-top: 0;
    color: var(--muted);
}

.embed-code {
    width: 100%;
    min-height: 96px;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.6rem;
    font-family: monospace;
    font-size: 0.92rem;
    resize: vertical;
    background: #f8fafc;
}

.tour-layout {
    display: grid;
    gap: 1rem;
    grid-template-columns: 280px 1fr;
}

.room-sidebar {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.8rem;
    padding: 0.9rem;
    align-self: start;
}

.room-sidebar h3 {
    margin-top: 0;
}

.room-sidebar ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.5rem;
}

.room-button {
    width: 100%;
    text-align: left;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 0.5rem;
    padding: 0.5rem 0.65rem;
    cursor: pointer;
    font-size: 0.95rem;
}

.room-button:hover,
.room-button:focus {
    border-color: #6ab4e0;
}

.room-button.active {
    background: #e1f5f9;
    border-color: #38bdf8;
    font-weight: 700;
}

.viewer-column {
    min-width: 0;
}

.viewer {
    width: 100%;
    height: 68vh;
    min-height: 360px;
    border-radius: 0.8rem;
    overflow: hidden;
    border: 1px solid var(--border);
}

.viewer-hint {
    margin: 0.55rem 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}

@media (max-width: 900px) {
    .tour-layout {
        grid-template-columns: 1fr;
    }

    .room-sidebar ul {
        display: flex;
        overflow-x: auto;
        padding-bottom: 0.4rem;
    }

    .room-sidebar li {
        min-width: 180px;
    }

    .room-button {
        white-space: nowrap;
    }

    .viewer {
        height: 58vh;
    }
}

.admin-auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
}

.admin-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.8rem;
    padding: 1rem;
    margin-bottom: 1rem;
}

.admin-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 320px 1fr;
}

.admin-header-row {
    display: flex;
    justify-content: space-between;
    gap: 0.8rem;
    align-items: center;
}

.admin-form {
    display: grid;
    gap: 0.5rem;
}

.admin-form input,
.admin-form textarea,
.admin-form select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 0.45rem;
    padding: 0.5rem 0.6rem;
    font: inherit;
}

.admin-table-wrap {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    border: 1px solid var(--border);
    padding: 0.5rem;
    text-align: left;
    vertical-align: top;
}

.admin-table input {
    min-width: 130px;
}

.btn-danger {
    background: #b91c1c;
}

.btn-danger:hover,
.btn-danger:focus {
    background: #991b1b;
}

.hotspot-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 0.8rem;
}

.hotspot-controls label {
    font-weight: 700;
}

.admin-tour-layout {
    grid-template-columns: 1fr 320px;
}

.hotspot-form-box {
    display: grid;
    gap: 0.4rem;
}

.hotspot-buttons {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.hotspot-list {
    list-style: none;
    margin: 0.8rem 0 0;
    padding: 0;
    display: grid;
    gap: 0.4rem;
}

.hotspot-item {
    border: 1px solid var(--border);
    padding: 0.45rem 0.55rem;
    border-radius: 0.45rem;
    background: #fff;
    cursor: pointer;
}

.hotspot-item.active {
    border-color: #38bdf8;
    background: #e0f2fe;
}

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

@media (max-width: 900px) {
    .admin-grid {
        grid-template-columns: 1fr;
    }

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

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