:root {
    --bg-body: #0f1115;
    --bg-card: #181b21;
    --bg-card-hover: #1f232b;
    --bg-header: rgba(15, 17, 21, 0.95);

    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-accent: #3b82f6;
    --text-link: #60a5fa;

    --border: #2d313a;
    --accent: #6366f1;
    --accent-hover: #4f46e5;

    --font-heading: 'Inter', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;
}

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

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--text-link);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.hidden {
    display: none !important;
}

/* Header */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--bg-header);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-area h1 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.badge {
    background-color: #374151;
    color: #d1d5db;
    font-size: 0.75rem;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-weight: 500;
}

/* Search Bar */
.search-container {
    flex: 1;
    max-width: 500px;
    position: relative;
}

#searchInput {
    width: 100%;
    background-color: #232730;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.2s;
}

#searchInput:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    display: flex;
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    font-family: var(--font-heading);
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}


.control-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Toggle Switch */
.toggle-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.8rem;
    user-select: none;
}

.toggle-switch input {
    display: none;
}

.slider {
    width: 32px;
    height: 18px;
    background-color: var(--border);
    border-radius: 9999px;
    position: relative;
    transition: 0.2s;
}

.slider::before {
    content: "";
    position: absolute;
    width: 14px;
    height: 14px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    border-radius: 50%;
    transition: 0.2s;
}

.toggle-switch input:checked+.slider {
    background-color: var(--accent);
}

.toggle-switch input:checked+.slider::before {
    transform: translateX(14px);
}

.label-text {
    color: var(--text-secondary);
}

.toggle-switch:hover .label-text {
    color: var(--text-primary);
}

/* Header Controls Row */
.header-controls-row {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Region Filter */
.region-filter {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.option-filter {
    display: flex;
    gap: 1rem;
    align-items: center;
    padding-left: 1.5rem;
    border-left: 1px solid var(--border);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    user-select: none;
    transition: color 0.2s;
}

.checkbox-label:hover {
    color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--accent);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* Tag Filters */
.tag-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-top: 0.75rem;
    margin-top: 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);

    /* Resizable Logic */
    max-height: 120px;
    overflow-y: auto;
    resize: vertical;
    min-height: 50px;
}

/* Enter Button */
.btn-enter {
    background-color: #10b981;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    display: inline-block;
    margin-top: 1rem;
    width: 100%;
}

.btn-enter:hover {
    background-color: #059669;
    text-decoration: none;
    transform: translateY(-1px);
}

/* Favorite Star */
.star-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: #4b5563;
    padding: 0 4px;
    transition: color 0.1s;
    vertical-align: middle;
}

.star-btn:hover {
    color: #fbbf24;
}

.star-btn.active {
    color: #fbbf24;
}

/* Room Highlight */
.room-card.has-favorite {
    border-color: #fbbf24;
    box-shadow: 0 0 0 1px rgba(251, 191, 36, 0.2);
}

.filter-tag {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 0.8rem;
    padding: 0.35rem 0.75rem;
    border-radius: 9999px;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s;
    user-select: none;
}

.filter-tag:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.filter-tag.active {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
}

.filter-tag.active:hover {
    background-color: var(--accent-hover);
}


/* States */
.state-message {
    padding: 4rem 0;
    text-align: center;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--accent);
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Room List - VERTICAL LAYOUT */
.room-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 2rem 0;
}

.room-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.2s, background-color 0.2s, border-color 0.2s;
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 1.5rem;
}

.room-card:hover {
    background-color: var(--bg-card-hover);
    border-color: #3f4552;
    transform: translateY(-1px);
}

.room-card.has-favorite {
    border-color: rgba(251, 191, 36, 0.4);
    background-color: rgba(251, 191, 36, 0.05);
}

.room-card.has-favorite:hover {
    border-color: #fbbf24;
    background-color: rgba(251, 191, 36, 0.15);
}

.star-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 2px;
    font-size: 1.1rem;
    line-height: 1;
    color: var(--text-secondary);
    transition: transform 0.1s, color 0.2s;
    vertical-align: middle;
}

.star-btn:hover {
    transform: scale(1.2);
    color: #fbbf24;
}

.star-btn.active {
    color: #fbbf24;
}

/* Room Meta (Left side) */
.room-meta {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.room-header-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5rem;
}

.room-name-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.room-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.lock-icon {
    color: #f59e0b;
    flex-shrink: 0;
}

.room-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tag {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.creator-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    background-color: #374151;
}

.creator-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Room Content (Right side) */
.room-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.room-desc {
    color: #d1d5db;
    font-size: 0.95rem;
    white-space: pre-wrap;
    /* Show all text with line breaks */
    word-break: break-all;
    line-height: 1.6;
}

.members-section {
    margin-top: auto;
}

.members-header {
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.members-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.member-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 0.35rem 0.75rem 0.35rem 0.35rem;
    border-radius: 9999px;
    font-size: 0.85rem;
    border: 1px solid transparent;
}

.member-item.is-owner {
    border-color: rgba(99, 102, 241, 0.3);
    background-color: rgba(99, 102, 241, 0.1);
}

.member-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

.member-name {
    color: #e5e7eb;
    /* max-width removed to prevent truncation */
    /* white-space, overflow, text-overflow removed */
}

.member-inst {
    color: var(--text-secondary);
    font-size: 0.75rem;
    margin-left: 0.25rem;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: stretch;
    }

    .search-container {
        max-width: none;
    }

    .room-card {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .room-meta {
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        padding-bottom: 1rem;
    }

    .creator-info {
        border-top: none;
        padding-top: 0;
        margin-top: 0;
    }

    .region-filter {
        border-left: none;
        padding-left: 0;
        justify-content: flex-start;
        padding-top: 0.5rem;
    }
}

/* Activity Log */
.activity-log {
    background-color: rgba(251, 191, 36, 0.05);
    border: 1px solid #fbbf24;
    border-radius: 12px;
    margin-bottom: 2rem;
    overflow: hidden;
}

.activity-log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background-color: rgba(251, 191, 36, 0.1);
    border-bottom: 1px solid rgba(251, 191, 36, 0.3);
}

.activity-log-header h3 {
    margin: 0;
    font-size: 1rem;
    color: #fbbf24;
}

.btn-clear {
    background: none;
    border: 1px solid rgba(251, 191, 36, 0.5);
    color: #fbbf24;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.btn-clear:hover {
    background-color: rgba(251, 191, 36, 0.1);
    border-color: #fbbf24;
}

.activity-log-content {
    max-height: 300px;
    overflow-y: auto;
    padding: 0.5rem;
}

.log-entry {
    display: flex;
    gap: 1rem;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    background-color: var(--bg-card);
    border-radius: 8px;
    border-left: 3px solid #fbbf24;
}

.log-time {
    color: var(--text-secondary);
    font-size: 0.85rem;
    white-space: nowrap;
    min-width: 80px;
}

.log-message {
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.4;
}

.log-message strong {
    color: #fbbf24;
}

@keyframes highlight-fade {
    0% {
        background-color: rgba(99, 102, 241, 0.4);
    }

    100% {
        background-color: transparent;
    }
}

.jump-highlight {
    animation: highlight-fade 2s ease-out;
}

.app-footer {
    text-align: center;
    padding: 2rem 0;
    color: #4b5563;
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}