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

:root {
    --bg: #07111f;
    --bg-deep: #030915;
    --surface: rgba(11, 21, 40, 0.72);
    --surface-strong: rgba(8, 16, 31, 0.9);
    --surface-soft: rgba(21, 35, 61, 0.62);
    --surface-bright: rgba(163, 214, 255, 0.08);
    --line: rgba(157, 195, 255, 0.16);
    --line-strong: rgba(157, 209, 255, 0.34);
    --text-primary: #f4f8ff;
    --text-secondary: #94a8c8;
    --text-muted: #7386a3;
    --primary-color: #93f2ff;
    --primary-strong: #5ac7ff;
    --primary-hover: #b8f8ff;
    --secondary-color: #243754;
    --secondary-hover: #32486a;
    --background: rgba(255, 255, 255, 0.04);
    --success: #55f4b0;
    --error: #ff7a93;
    --warning: #ffbd6f;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
    --shadow-lg: 0 40px 90px rgba(0, 0, 0, 0.38);
    --glow: 0 0 0 1px rgba(147, 242, 255, 0.18), 0 18px 40px rgba(31, 118, 255, 0.18);
}

html,
body {
    height: 100%;
    min-height: 100%;
}

body {
    font-family: "Avenir Next", "Segoe UI", sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    touch-action: manipulation;
    background:
        radial-gradient(circle at 12% 18%, rgba(119, 255, 247, 0.14), transparent 26%),
        radial-gradient(circle at 84% 12%, rgba(92, 156, 255, 0.18), transparent 24%),
        radial-gradient(circle at 70% 70%, rgba(255, 255, 255, 0.06), transparent 18%),
        linear-gradient(145deg, #030814 0%, #091426 36%, #07101f 100%);
    position: relative;
    overflow-x: hidden;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
}

body::before {
    background:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: radial-gradient(circle at center, black 45%, transparent 88%);
    opacity: 0.18;
}

body::after {
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.08), transparent 60%);
    transform: scale(1.35);
    opacity: 0.35;
}

body.mobile-sidebar-open {
    overflow: hidden;
}

body.page-room {
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

a {
    color: inherit;
}

.container {
    width: min(1400px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 100vh;
    padding: 18px 0 22px;
    display: flex;
    flex-direction: column;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
    padding: 16px 22px;
    margin-bottom: 18px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02)),
        var(--surface);
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.site-header {
    position: relative;
    overflow: hidden;
}

.site-header::after {
    content: "";
    position: absolute;
    inset: auto -10% -55% 38%;
    height: 160px;
    background: radial-gradient(circle, rgba(147, 242, 255, 0.22), transparent 60%);
    pointer-events: none;
}

.brand-lockup {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.brand-mark {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    color: #03101b;
    background: linear-gradient(135deg, var(--primary-color), #79a7ff);
    box-shadow: 0 14px 30px rgba(98, 191, 255, 0.34);
}

.brand-copy {
    min-width: 0;
}

header h1 {
    font-family: "Avenir Next Condensed", "Arial Narrow", sans-serif;
    font-size: clamp(1.9rem, 2.8vw, 2.6rem);
    line-height: 0.95;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.brand-kicker {
    margin-top: 4px;
    font-size: 0.8rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.header-badge,
.section-kicker,
.panel-kicker,
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    align-self: flex-start;
    padding: 6px 12px;
    border: 1px solid rgba(147, 242, 255, 0.24);
    border-radius: 12px;
    background: rgba(147, 242, 255, 0.08);
    color: var(--primary-color);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.language-selector select,
.language-selector-small,
.form-group input,
.input-area input[type="text"],
.link-share input {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
    margin: 5px;
}

.language-selector select,
.language-selector-small {
    width: auto;
    min-width: 108px;
    padding: 10px 14px;
    cursor: pointer;
    font-size: 0.95rem;
    appearance: none;
}

.language-icon-btn {
    display: none;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.24s ease;
}

.language-icon-btn:hover {
    background: rgba(255, 255, 255, 0.09);
    color: var(--text-primary);
}

.language-selector select:focus,
.language-selector-small:focus,
.form-group input:focus,
.input-area input[type="text"]:focus,
.link-share input:focus {
    outline: none;
    border-color: var(--line-strong);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.08),
        0 0 0 4px rgba(147, 242, 255, 0.08);
}

.btn {
    border: 1px solid transparent;
    border-radius: 12px;
    padding: 10px 16px;
    cursor: pointer;
    transition: transform 0.24s ease, border-color 0.24s ease, background 0.24s ease, box-shadow 0.24s ease;
    font-family: inherit;
    font-size: 0.98rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    color: #03101b;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-strong));
    box-shadow: 0 18px 30px rgba(66, 184, 255, 0.22);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), #77d8ff);
}

.btn-secondary {
    color: var(--text-primary);
    border-color: var(--line);
    background: rgba(255, 255, 255, 0.05);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: var(--line-strong);
}

.btn-icon {
    width: 42px;
    height: 42px;
    padding: 0;
    display: grid;
    place-items: center;
    font-size: 1.2rem;
    color: var(--text-primary);
    border-color: var(--line);
    background: rgba(255, 255, 255, 0.04);
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.09);
}

.home-page {
    flex: 1;
    display: flex;
    align-items: center;
}

.hero {
    width: 100%;
    /* display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr); */
    gap: 24px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02)),
        var(--surface);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
    align-items: center;
}

.hero::before {
    content: "";
    position: absolute;
    inset: auto auto -90px -50px;
    width: 320px;
    height: 320px;
    border-radius: 12px;
    background: radial-gradient(circle, rgba(147, 242, 255, 0.18), transparent 66%);
}

.hero::after {
    content: "";
    position: absolute;
    inset: 18px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    pointer-events: none;
}

.hero-copy,
.hero-panel {
    position: relative;
    z-index: 1;
}

.hero-copy {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 660px;
}

.hero h2 {
    font-family: "Avenir Next Condensed", "Arial Narrow", sans-serif;
    font-size: clamp(3.4rem, 7vw, 6.3rem);
    line-height: 0.9;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.hero p {
    font-size: 1rem;
    color: var(--text-secondary);
}

.hero-highlights {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-top: 2px;
}

.highlight-card {
    padding: 14px;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-height: 104px;
    justify-content: space-between;
}

.highlight-value {
    font-family: "Avenir Next Condensed", "Arial Narrow", sans-serif;
    font-size: 1.35rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary-color);
}

.highlight-label {
    font-size: 0.86rem;
    color: var(--text-secondary);
}

.hero-panel {
    display: flex;
    justify-content: stretch;
    width: 100%;
}

.hero-panel-shell {
    width: 100%;
    padding: 18px;
    border-radius: 12px;
    border: 1px solid rgba(147, 242, 255, 0.16);
    background:
        linear-gradient(160deg, rgba(147, 242, 255, 0.08), transparent 28%),
        rgba(5, 13, 26, 0.78);
    box-shadow: var(--glow);
}

.hero-panel-head {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
    
}

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

.home-config {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 18px;
}

.home-config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
    gap: 12px;
    align-items: stretch;
}

.home-config > .form-group,
.home-config-grid > .form-group {
    width: 100%;
    min-width: 0;
    margin-bottom: 0;
}

.home-config > .form-group input,
.home-config-grid .form-group input:not([type="checkbox"]) {
    width: 100%;
    margin: 0;
    box-sizing: border-box;
}

.home-success {
    animation: fadeIn 0.35s ease-out;
}

.home-success-header {
    margin-bottom: 16px;
}

.home-success-header h3 {
    font-size: 1.55rem;
    margin-bottom: 6px;
}

.home-success-grid {
    margin-bottom: 18px;
    gap: 14px;
    align-items: start;
    justify-items: start;
}

.home-success-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-start;
    margin-top: 18px;
}

.home-share-link-group {
    margin-bottom: 0;
}

.share-link-text {
    width: 100%;
    min-width: 0;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.45;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.home-qr-card,
.upload-preview-card,
.message-file {
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
}

.home-qr-card {
    padding: 14px;
}

.home-qr-label {
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: left;
}

.home-qr-frame {
    min-height: 188px;
    border-radius: 12px;
    display: flex;
    justify-content: left;
    padding: 12px;
}

.home-qr-frame img {
    display: block;
    width: 100%;
    max-width: 176px;
    height: auto;
    border-radius: 12px;
    background: #fff;
    padding: 10px;
}

.home-qr-loading {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: center;
}

.room-container {
    width: min(1520px, calc(100% - 24px));
}

body.page-room .room-container {
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    overflow: hidden;
}

body.page-room .site-header {
    flex: 0 0 auto;
}

.room-layout {
    flex: 1;
    display: grid;
    grid-template-columns: minmax(260px, 300px) minmax(0, 1fr);
    gap: 16px;
    min-height: 0;
    overflow: hidden;
}

.sidebar,
.chat-area,
.modal-content,
.error-content {
    border: 1px solid var(--line);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02)),
        var(--surface);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    box-shadow: var(--shadow);
}

.sidebar {
    padding: 18px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
    position: relative;
}

.sidebar::before {
    content: "";
    position: absolute;
    inset: auto -70px -40px auto;
    width: 180px;
    height: 180px;
    border-radius: 12px;
    background: radial-gradient(circle, rgba(147, 242, 255, 0.12), transparent 68%);
    pointer-events: none;
}

.sidebar-header {
    margin-bottom: 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-header-row {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.sidebar-header-copy {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 0;
}

.sidebar h3 {
    font-size: 1.25rem;
}

.sidebar-copy {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.mobile-users-toggle,
.sidebar-close-btn,
.sidebar-backdrop {
    display: none;
}

.users-list {
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 10px;
    min-height: 0;
    overflow-y: auto;
    position: relative;
    z-index: 1;
}

.user-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 13px;
    border-radius: 12px;
    border: 1px solid rgba(157, 209, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
}

.user-status {
    width: 12px;
    height: 12px;
    border-radius: 12px;
    background: var(--success);
    box-shadow: 0 0 14px rgba(85, 244, 176, 0.55);
    flex-shrink: 0;
}

.user-status.offline {
    background: var(--text-muted);
    box-shadow: none;
}

.user-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.user-name {
    font-weight: 600;
}

.user-id,
.user-badge {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.chat-area {
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
    position: relative;
}

.chat-area::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at top right, rgba(147, 242, 255, 0.12), transparent 30%),
        radial-gradient(circle at bottom left, rgba(92, 156, 255, 0.12), transparent 26%);
    pointer-events: none;
}

.chat-topbar,
.chat-topbar-actions,
.connection-status,
.input-area,
.upload-progress,
.upload-preview {
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.chat-topbar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
    padding: 18px 20px 14px;
    border-bottom: 1px solid rgba(157, 209, 255, 0.1);
}

.chat-topbar-actions {
    position: relative;
    height: 0;
    flex-shrink: 0;
    pointer-events: none;
    z-index: 0;
}

.chat-identity {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-meta-row {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.chat-identity h2 {
    font-family: "Avenir Next Condensed", "Arial Narrow", sans-serif;
    font-size: clamp(2rem, 3vw, 3.2rem);
    line-height: 0.95;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.room-meta-display {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin: 0;
    min-width: 0;
}

.chat-aura {
    position: absolute;
    right: 20px;
    bottom: 12px;
    width: 104px;
    height: 104px;
    border-radius: 12px;
    background: radial-gradient(circle, rgba(147, 242, 255, 0.2), transparent 68%);
    filter: blur(6px);
    opacity: 0.8;
    flex-shrink: 0;
}

.connection-status {
    margin: 0 18px;
    padding: 10px 14px;
    border: 1px solid rgba(255, 189, 111, 0.26);
    background: rgba(255, 189, 111, 0.12);
    color: #ffe1ae;
    border-radius: 12px;
    text-align: center;
    font-weight: 600;
}

.connection-status.hidden,
.upload-progress.hidden,
.upload-preview.hidden,
.modal.hidden,
.info-message.hidden {
    display: none;
}

.messages-container {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 18px 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
    z-index: 1;
}

.message {
    display: flex;
    flex-direction: column;
    max-width: min(72%, 760px);
    animation: fadeIn 0.32s ease-out;
}

.message.own {
    align-self: flex-end;
}

.message.system {
    align-self: center;
    max-width: 100%;
}

.message-header {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 6px;
    padding: 0 4px;
    font-size: 0.84rem;
}

.message-sender {
    font-weight: 700;
    color: var(--primary-color);
}

.message-time,
.message-user-id {
    color: var(--text-muted);
}

.message-content {
    padding: 11px 14px;
    border-radius: 12px;
    border: 1px solid rgba(157, 209, 255, 0.12);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    word-break: break-word;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.message.own .message-content {
    background: linear-gradient(135deg, rgba(147, 242, 255, 0.18), rgba(92, 156, 255, 0.22));
    border-color: rgba(147, 242, 255, 0.26);
    border-radius: 12px;
}

.message.system .message-content {
    padding: 8px 14px;
    border-radius: 12px;
    border-color: rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    text-align: center;
    font-size: 0.86rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.message-image {
    display: block;
    max-width: min(100%, 360px);
    border-radius: 12px;
}

.message-file {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
}

.message-file-icon {
    font-size: 1.6rem;
}

.message-file-info {
    flex: 1;
    min-width: 0;
}

.message-file-name {
    font-weight: 600;
    word-break: break-word;
}

.message-file-size {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.input-area {
    display: grid;
    grid-template-columns: auto auto minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    padding: 14px 18px 16px;
    border-top: 1px solid rgba(157, 209, 255, 0.1);
    background: rgba(3, 10, 20, 0.34);
}

.input-area input[type="text"] {
    padding: 13px 14px;
    font-size: 0.96rem;
}

.upload-progress {
    padding: 0 18px 12px;
}

.progress-bar {
    height: 10px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.08);
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-strong));
    transition: width 0.25s ease;
}

#progress-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.upload-preview {
    padding: 0 18px 14px;
}

.upload-preview-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 13px;
}

.upload-preview-image {
    width: 72px;
    height: 72px;
    object-fit: cover;
    border-radius: 12px;
}

.upload-preview-file {
    font-size: 2rem;
}

.upload-preview-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    color: var(--text-secondary);
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 14, 0.72);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 18px;
}

.modal-content {
    width: min(720px, 100%);
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    border-radius: 12px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 18px 20px;
    border-bottom: 1px solid rgba(157, 209, 255, 0.1);
}

.modal-header h2 {
    font-size: 1.5rem;
}

.modal-close {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    font-size: 1.8rem;
    cursor: pointer;
}

.modal-body {
    padding: 18px 20px 22px;
}

.settings-section {
    padding: 16px;
    border: 1px solid rgba(157, 209, 255, 0.1);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
}

.settings-section + .settings-section {
    margin-top: 14px;
}

.settings-section h3 {
    margin-bottom: 12px;
    font-size: 1.05rem;
}

.form-group {
    margin-bottom: 12px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.82rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.form-group input {
    padding: 11px 12px;
    font-size: 0.96rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 14px;
}

.checkbox-group input {
    width: 20px;
    height: 20px;
    flex: 0 0 auto;
}

.link-share {
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
    padding: 10px 20px;
    display: flex;
    gap: 10px;
}

.link-share input {
    flex: 1;
    padding: 11px 12px;
}

.qr-code-container {
    margin-top: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.qr-code-container img {
    width: min(190px, 100%);
    border-radius: 12px;
    background: #fff;
    padding: 10px;
}

.info-message {
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid rgba(255, 189, 111, 0.18);
    background: rgba(255, 189, 111, 0.1);
    color: #ffe1ae;
    margin-bottom: 14px;
}

.room-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.room-info p,
.user-id-text {
    color: var(--text-secondary);
}

.creator-locked {
    opacity: 0.76;
}

.error-page {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.error-content {
    width: min(560px, 100%);
    padding: 32px;
    border-radius: 12px;
    text-align: center;
}

.error-icon {
    font-size: 4rem;
    margin-bottom: 18px;
}

.error-content h2 {
    font-size: 2.2rem;
    margin-bottom: 12px;
}

.error-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.loading {
    opacity: 0.7;
    pointer-events: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.messages-container::-webkit-scrollbar,
.users-list::-webkit-scrollbar,
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.messages-container::-webkit-scrollbar-track,
.users-list::-webkit-scrollbar-track,
.modal-content::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.03);
}

.messages-container::-webkit-scrollbar-thumb,
.users-list::-webkit-scrollbar-thumb,
.modal-content::-webkit-scrollbar-thumb {
    background: rgba(157, 209, 255, 0.18);
    border-radius: 12px;
}

.messages-container::-webkit-scrollbar-thumb:hover,
.users-list::-webkit-scrollbar-thumb:hover,
.modal-content::-webkit-scrollbar-thumb:hover {
    background: rgba(157, 209, 255, 0.32);
}

@media (max-width: 1100px) {
    /* .hero {
        grid-template-columns: 1fr;
    } */

    .room-layout {
        grid-template-columns: 1fr;
        min-height: 0;
    }

    .sidebar {
        min-height: 220px;
    }

    .users-list {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .container,
    .room-container {
        width: min(100%, calc(100% - 20px));
    }

    .container {
        padding: 12px 0 18px;
    }

    body.page-room .room-container {
        padding: 12px 0 18px;
    }

    header {
        padding: 14px;
        margin-bottom: 14px;
        border-radius: 12px;
        flex-direction: row;
        align-items: flex-start;
        justify-content: space-between;
        gap: 12px;
        position: relative;
    }

    .brand-lockup {
        flex: 1 1 auto;
        min-width: 0;
    }

    .brand-copy {
        min-width: 0;
    }

    header h1 {
        font-size: clamp(1.45rem, 7vw, 1.9rem);
    }

    .brand-kicker {
        font-size: 0.72rem;
        letter-spacing: 0.08em;
    }

    .header-actions {
        width: auto;
        flex: 0 0 auto;
        justify-content: flex-end;
        align-self: flex-start;
        margin-top: -2px;
        gap: 8px;
    }

    .language-icon-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        transform: translateY(-2px);
    }

    .language-selector,
    .language-selector-small {
        display: none;
    }

    .hero {
        padding: 20px 16px;
        border-radius: 12px;
        gap: 18px;
    }

    .hero h2 {
        font-size: clamp(2.8rem, 17vw, 4.2rem);
    }

    .hero-highlights {
        grid-template-columns: 1fr;
    }

    .hero-panel-shell {
        padding: 14px;
    }

    .home-config-grid,
    .home-success-grid {
        grid-template-columns: 1fr;
        justify-items: left;
    }

    .home-config,
    #room-settings-section {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .home-config-grid {
        gap: 10px;
    }

    .home-config .form-group,
    #room-settings-section .form-group {
        margin-bottom: 0;
        padding: 14px;
        border: 1px solid rgba(157, 209, 255, 0.1);
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.03);
    }

    .home-config .form-group label,
    #room-settings-section .form-group label {
        margin-bottom: 8px;
        font-size: 0.78rem;
        letter-spacing: 0.08em;
    }

    .home-config .form-group input:not([type="checkbox"]),
    #room-settings-section .form-group input:not([type="checkbox"]) {
        width: 100%;
        min-height: 50px;
        padding: 13px 14px;
        font-size: 16px;
        border-radius: 12px;
        border-color: rgba(157, 209, 255, 0.18);
        background: rgba(3, 10, 20, 0.42);
        box-sizing: border-box;
    }

    .home-config .form-group input[type="datetime-local"],
    #room-settings-section .form-group input[type="datetime-local"] {
        min-height: 52px;
    }

    .home-config .checkbox-group,
    #room-settings-section .checkbox-group {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        min-height: 78px;
    }

    .home-config .checkbox-group label,
    #room-settings-section .checkbox-group label {
        flex: 1;
        margin-bottom: 0;
        padding-right: 14px;
    }

    .home-config .checkbox-group input,
    #room-settings-section .checkbox-group input {
        position: relative;
        width: 52px;
        height: 32px;
        border: 1px solid rgba(157, 209, 255, 0.18);
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.08);
        box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
        appearance: none;
        -webkit-appearance: none;
    }

    .home-config .checkbox-group input::before,
    #room-settings-section .checkbox-group input::before {
        content: "";
        position: absolute;
        top: 3px;
        left: 3px;
        width: 24px;
        height: 24px;
        border-radius: 12px;
        background: #f4f8ff;
        box-shadow: 0 6px 14px rgba(0, 0, 0, 0.24);
        transition: transform 0.22s ease;
    }

    .home-config .checkbox-group input:checked,
    #room-settings-section .checkbox-group input:checked {
        background: linear-gradient(135deg, rgba(147, 242, 255, 0.88), rgba(90, 199, 255, 0.92));
        border-color: rgba(147, 242, 255, 0.5);
    }

    .home-config .checkbox-group input:checked::before,
    #room-settings-section .checkbox-group input:checked::before {
        transform: translateX(20px);
    }

    .home-success-actions,
    .link-share {
        flex-direction: column;
    }

    #room-settings-section h3,
    #room-settings-section .info-message {
        margin-bottom: 0;
    }

    #save-settings-btn {
        width: 100%;
    }

    .sidebar,
    .chat-area {
        border-radius: 12px;
    }

    .room-layout {
        gap: 12px;
        min-height: 0;
        position: relative;
    }

    .sidebar {
        display: none;
    }

    .sidebar.mobile-open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 12px;
        left: 10px;
        right: 10px;
        bottom: 12px;
        z-index: 35;
        padding: 16px;
        overflow: hidden;
    }

    .sidebar-close-btn {
        display: grid;
        flex-shrink: 0;
    }

    .sidebar-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        z-index: 30;
        background: rgba(3, 9, 21, 0.72);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
    }

    .sidebar-backdrop.hidden {
        display: none;
    }

    .chat-topbar {
        padding: 16px 16px 12px;
        gap: 10px;
    }

    .chat-topbar-actions {
        height: 0;
    }

    .chat-identity h2 {
        font-size: clamp(1rem, 6.6vw, 1.9rem);
        letter-spacing: 0.03em;
    }

    .mobile-users-toggle {
        display: inline-flex;
        justify-content: center;
        align-items: center;
        width: auto;
        padding: 0 12px;
        font-size: 0.82rem;
        border-radius: 999px;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .chat-meta-row {
        align-items: center;
        justify-content: flex-start;
        gap: 8px;
        flex-wrap: wrap;
    }

    .chat-aura {
        right: 16px;
        bottom: 10px;
        width: 90px;
        height: 90px;
    }

    .users-list {
        display: flex;
        grid-template-columns: none;
    }

    .messages-container {
        padding: 14px 16px 10px;
    }

    .message {
        max-width: 88%;
    }

    .input-area {
        grid-template-columns: auto auto minmax(0, 1fr);
        padding: 12px 14px 14px;
        align-items: stretch;
    }

    .input-area input[type="text"] {
        grid-column: 1 / -1;
        grid-row: 1;
        margin: 0;
    }

    #upload-image-btn {
        grid-column: 1;
        grid-row: 2;
    }

    #upload-file-btn {
        grid-column: 2;
        grid-row: 2;
    }

    #send-btn {
        grid-column: 3;
        grid-row: 2;
        width: 100%;
    }

    .upload-progress,
    .upload-preview {
        padding-left: 14px;
        padding-right: 14px;
    }

    .modal {
        padding: 0;
        align-items: flex-end;
    }

    .modal-content {
        max-height: 92vh;
        border-radius: 12px;
    }

    .error-content {
        padding: 24px 18px;
    }
}

@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 48px;
    }

    .btn-icon {
        width: 42px;
        height: 42px;
    }

    .input-area input[type="text"] {
        font-size: 16px;
    }
}