/* Material 3 Inspired Color Palette */
:root {
    --md-sys-color-primary-rgb: 103, 80, 164;
    --md-sys-color-primary: #6750a4;
    --md-sys-color-on-primary-rgb: 255, 255, 255;
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-primary-container-rgb: 233, 221, 255;
    --md-sys-color-primary-container: #e9ddff;
    --md-sys-color-on-primary-container-rgb: 34, 0, 93;
    --md-sys-color-on-primary-container: #22005d;
    --md-sys-color-secondary-rgb: 98, 91, 113;
    --md-sys-color-secondary: #625b71;
    --md-sys-color-on-secondary-rgb: 255, 255, 255;
    --md-sys-color-on-secondary: #ffffff;
    --md-sys-color-secondary-container-rgb: 232, 222, 248;
    --md-sys-color-secondary-container: #e8def8;
    --md-sys-color-on-secondary-container-rgb: 30, 25, 43;
    --md-sys-color-on-secondary-container: #1e192b;
    --md-sys-color-tertiary-rgb: 126, 82, 96;
    --md-sys-color-tertiary: #7e5260;
    --md-sys-color-on-tertiary-rgb: 255, 255, 255;
    --md-sys-color-on-tertiary: #ffffff;
    --md-sys-color-tertiary-container-rgb: 255, 217, 227;
    --md-sys-color-tertiary-container: #ffd9e3;
    --md-sys-color-on-tertiary-container-rgb: 49, 16, 29;
    --md-sys-color-on-tertiary-container: #31101d;
    --md-sys-color-error-rgb: 186, 26, 26;
    --md-sys-color-error: #ba1a1a;
    --md-sys-color-on-error-rgb: 255, 255, 255;
    --md-sys-color-on-error: #ffffff;
    --md-sys-color-error-container-rgb: 255, 218, 214;
    --md-sys-color-error-container: #ffdad6;
    --md-sys-color-on-error-container-rgb: 65, 0, 2;
    --md-sys-color-on-error-container: #410002;
    --md-sys-color-background-rgb: 255, 251, 255;
    --md-sys-color-background: #fffbff;
    --md-sys-color-on-background-rgb: 28, 27, 30;
    --md-sys-color-on-background: #1c1b1e;
    --md-sys-color-surface-rgb: 255, 251, 255;
    --md-sys-color-surface: #fffbff;
    --md-sys-color-on-surface-rgb: 28, 27, 30;
    --md-sys-color-on-surface: #1c1b1e;
    --md-sys-color-surface-variant-rgb: 231, 224, 235;
    --md-sys-color-surface-variant: #e7e0eb;
    --md-sys-color-on-surface-variant-rgb: 73, 69, 78;
    --md-sys-color-on-surface-variant: #49454e;
    --md-sys-color-outline-rgb: 122, 117, 127;
    --md-sys-color-outline: #7a757f;
    --md-sys-color-outline-variant-rgb: 202, 196, 207;
    --md-sys-color-outline-variant: #cac4cf;
    --md-sys-color-shadow-rgb: 0, 0, 0;
    --md-sys-color-shadow: #000000;
    --md-sys-color-scrim-rgb: 0, 0, 0;
    --md-sys-color-scrim: #000000;
    --md-sys-color-inverse-surface-rgb: 49, 48, 51;
    --md-sys-color-inverse-surface: #313033;
    --md-sys-color-inverse-on-surface-rgb: 244, 239, 244;
    --md-sys-color-inverse-on-surface: #f4eff4;
    --md-sys-color-inverse-primary-rgb: 207, 188, 255;
    --md-sys-color-inverse-primary: #cfbcff;

    --animation-duration-short: 0.2s;
    --animation-duration-medium: 0.3s;
    --animation-duration-long: 0.4s;
    --animation-easing: cubic-bezier(0.4, 0, 0.2, 1); /* Material Design 标准缓动 */
    --panel-width: 340px;
}

html {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden; /* 防止水平滚动条 */
    -webkit-font-smoothing: antialiased; /* 优化字体渲染 */
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    height: 100vh; /* 确保容器占满视口 */
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1200px; /* 增强3D效果 */
}

.screen {
    background-color: var(--md-sys-color-surface);
    padding: 24px 32px; /* 调整内边距 */
    border-radius: 28px; /* Material 3 风格的更大圆角 */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.08); /* 更柔和的阴影 */
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform var(--animation-duration-long) var(--animation-easing),
        opacity var(--animation-duration-long) var(--animation-easing);
    position: absolute; /* 用于切换时的层叠 */
    width: calc(100% - 48px); /* 适配小屏幕 */
    max-width: 480px; /* 限制最大宽度 */
    opacity: 0;
    pointer-events: none;
    z-index: 1;
}

.screen.hidden {
    transform: translateY(20px) scale(0.98); /* 微调隐藏动画 */
    opacity: 0;
    pointer-events: none;
    z-index: 1;
}

.screen.visible {
    transform: translateY(0) scale(1);
    opacity: 1;
    pointer-events: auto;
    z-index: 10;
}

h1,
h2,
h3 {
    color: var(--md-sys-color-on-surface);
    margin-top: 0;
}

h1 {
    font-size: 2.25em;
    margin-bottom: 24px;
    font-weight: 500;
}

h2 {
    font-size: 1.75em;
    margin-bottom: 20px;
    font-weight: 500;
}

h3 {
    font-size: 1.25em;
    color: var(--md-sys-color-primary);
    margin-bottom: 16px;
    font-weight: 500;
}

button {
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    font-size: 0.9375rem; /* 15px */
    border: none;
    border-radius: 20px; /* 调整按钮圆角 */
    padding: 10px 24px; /* 调整按钮内边距 */
    cursor: pointer;
    transition: background-color var(--animation-duration-short) var(--animation-easing),
        box-shadow var(--animation-duration-short) var(--animation-easing),
        transform var(--animation-duration-short) var(--animation-easing);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px; /* 调整图标与文字间距 */
    text-decoration: none;
    outline: none;
    min-height: 40px; /* 确保按钮有足够的高度 */
}

button:hover {
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.08);
    transform: translateY(-1px);
}

button:active {
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
    transform: translateY(0px);
}

button:disabled {
    background-color: var(--md-sys-color-surface-variant) !important;
    color: var(--md-sys-color-on-surface-variant) !important;
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

button .material-icons {
    font-size: 22px; /* 调整图标大小 */
}

button.primary {
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
}

button.primary:hover:not(:disabled) {
    background-color: color-mix(in srgb, var(--md-sys-color-primary) 92%, black);
}

button.secondary {
    background-color: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
}

button.secondary:hover:not(:disabled) {
    background-color: color-mix(in srgb, var(--md-sys-color-secondary-container) 92%, black);
}

button.tertiary {
    background-color: var(--md-sys-color-tertiary-container);
    color: var(--md-sys-color-on-tertiary-container);
}

button.tertiary:hover:not(:disabled) {
    background-color: color-mix(in srgb, var(--md-sys-color-tertiary-container) 92%, black);
}

button.error {
    background-color: var(--md-sys-color-error);
    color: var(--md-sys-color-on-error);
}

button.error:hover:not(:disabled) {
    background-color: color-mix(in srgb, var(--md-sys-color-error) 90%, black);
}


input[type="text"],
input[type="password"],
input[type="file"] {
    font-family: 'Roboto', sans-serif;
    font-size: 1rem;
    padding: 12px 16px; /* 调整输入框内边距 */
    border-radius: 8px; /* 调整输入框圆角 */
    border: 1px solid var(--md-sys-color-outline);
    background-color: var(--md-sys-color-surface); /* 改为 surface，更亮 */
    color: var(--md-sys-color-on-surface);
    transition: border-color var(--animation-duration-short) var(--animation-easing),
        box-shadow var(--animation-duration-short) var(--animation-easing);
    width: 100%;
    max-width: 320px; /* 调整最大宽度 */
}

input[type="text"]::placeholder,
input[type="password"]::placeholder {
    color: var(--md-sys-color-on-surface-variant);
    opacity: 0.7;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="file"]:focus {
    outline: none;
    border-color: var(--md-sys-color-primary);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--md-sys-color-primary) 20%, transparent); /* 调整焦点阴影 */
}

input[type="file"] {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    cursor: pointer;
    border: 2px dashed var(--md-sys-color-primary); /* 虚线边框 */
    text-align: center;
}

input[type="file"]::file-selector-button {
    display: none; /* 隐藏默认按钮 */
}

input[type="file"]:hover {
    background-color: color-mix(in srgb, var(--md-sys-color-primary-container) 90%, white);
}


#initial-screen .button-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap; /* 允许换行 */
    justify-content: center;
    margin-bottom: 24px;
}

#form-wrapper {
    position: relative;
    width: 100%;
    max-width: 380px; /* 调整表单包装器宽度 */
    height: 0;
    overflow: hidden;
    transition: height var(--animation-duration-medium) var(--animation-easing);
    flex-shrink: 0;
}

.form-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px; /* 调整表单内边距 */
    background-color: var(--md-sys-color-surface-variant);
    border-radius: 16px; /* 调整表单圆角 */
    display: flex;
    flex-direction: column;
    gap: 16px; /* 调整表单元素间距 */
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: transform var(--animation-duration-medium) var(--animation-easing),
        opacity var(--animation-duration-medium) var(--animation-easing);
    will-change: transform, opacity; /* 优化动画性能 */
}

#create-room-form {
    transform: translateX(0%);
    z-index: 2;
}

#join-room-form {
    transform: translateX(100%);
    z-index: 1;
}

#form-wrapper.show-create #create-room-form,
#form-wrapper.show-join #join-room-form {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0%);
    z-index: 2;
}

#form-wrapper.show-create #join-room-form {
    opacity: 0;
    pointer-events: none;
    transform: translateX(100%);
    z-index: 1;
}

#form-wrapper.show-join #create-room-form {
    opacity: 0;
    pointer-events: none;
    transform: translateX(-100%);
    z-index: 1;
}

/* Main Room (Video Area) Styling */
#main-room {
    width: 100vw; /* Takes full width initially */
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background-color: #000;
    display: flex; /* Changed from flex to allow direct video child to fill */
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    z-index: 5; /* Lower z-index than panel and button */
    overflow: hidden;
    transition: opacity var(--animation-duration-medium) var(--animation-easing),
        width var(--animation-duration-medium) var(--animation-easing); /* Width transition is key */
}

#main-room.visible {
    opacity: 1;
    pointer-events: auto;
    z-index: 50; /* Ensure it's above initial screen but below panel controls */
}

/* When panel is open, main-room (video area) shrinks */
#main-room.panel-open {
    width: calc(100vw - var(--panel-width));
}

#video-container {
    position: relative; /* For danmaku positioning */
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#video-player {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background-color: #000;
    z-index: 1; /* Below danmaku */
}

#danmaku-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 80%;
    overflow: hidden;
    pointer-events: none;
    z-index: 2; /* Above video player */
}

.danmaku-item {
    position: absolute;
    right: 0;
    transform: translateX(100%);
    white-space: nowrap;
    opacity: 0.8;
    font-size: clamp(16px, 1.5vw, 24px);
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8), -1px -1px 2px rgba(0, 0, 0, 0.8), 1px -1px 2px rgba(0, 0, 0, 0.8), -1px 1px 2px rgba(0, 0, 0, 0.8);
    padding: 5px 10px;
    will-change: transform;
}

@keyframes scrollDanmaku {
    from {
        transform: translateX(100%);
    }

    to {
        transform: translateX(-100vw); /* Ensures it scrolls across the entire viewport width */
    }
}

/* Side Panel and Toggle Button Styling (now direct children of body) */
#toggle-panel-btn {
    position: fixed;
    top: 16px;
    right: 16px; /* Will be adjusted if panel is open and button needs to move with it */
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    z-index: 210; /* High z-index */
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
    transition: background-color var(--animation-duration-short) var(--animation-easing),
        transform var(--animation-duration-medium) var(--animation-easing),
        right var(--animation-duration-medium) var(--animation-easing); /* Added right transition */
}

#toggle-panel-btn.panel-open {
    background-color: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
    right: calc(var(--panel-width) + 16px); /* Move button to the left of the open panel */
}

#toggle-panel-btn .material-icons {
    font-size: 24px;
    transition: transform var(--animation-duration-medium) var(--animation-easing);
}

#toggle-panel-btn.panel-open .material-icons {
    transform: rotate(180deg);
}

#side-panel {
    position: fixed;
    top: 0;
    right: calc(var(--panel-width) * -1); /* Initially off-screen */
    width: var(--panel-width);
    height: 100%;
    background-color: var(--md-sys-color-surface);
    box-shadow: -4px 0 12px rgba(0, 0, 0, 0.1);
    transition: right var(--animation-duration-medium) var(--animation-easing);
    padding: 20px;
    z-index: 200; /* High z-index, but below toggle button if it overlaps */
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

#side-panel.open {
    right: 0; /* Slides in to be flush with the right edge of the viewport */
}


.panel-section {
    padding-bottom: 16px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.panel-section:last-child {
    border-bottom: none;
}

#host-controls {
    gap: 12px;
}

#room-info p {
    margin: 4px 0;
    font-size: 0.9375rem;
    color: var(--md-sys-color-on-surface-variant);
}

#room-info p span {
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
}

#room-info #display-room-password {
    font-weight: bold;
    color: var(--md-sys-color-primary);
    user-select: text;
}

#member-list-container {
    margin-top: 8px;
}

#member-list-container h3 {
    font-size: 1.05em;
    margin-bottom: 8px;
    color: var(--md-sys-color-secondary);
}

#member-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 180px;
    overflow-y: auto;
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: 12px;
    background-color: var(--md-sys-color-surface);
}

#member-list li {
    padding: 10px 14px;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--md-sys-color-surface-variant);
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: default;
}

#member-list li:last-child {
    border-bottom: none;
}

.member-color-swatch {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1px solid var(--md-sys-color-outline);
    flex-shrink: 0;
}

.member-name {
    flex-grow: 1;
    word-break: break-all;
    color: var(--md-sys-color-on-surface-variant);
}

.member-player-status {
    /* 为播放器状态添加样式 */
    font-size: 0.8em;
    margin-left: 8px;
    padding: 2px 6px;
    border-radius: 4px;
    white-space: nowrap;
}

.member-role {
    margin-left: auto;
    font-size: 0.8em;
    color: var(--md-sys-color-secondary);
    background-color: var(--md-sys-color-secondary-container);
    padding: 2px 6px;
    border-radius: 4px;
    white-space: nowrap;
}

#member-list li.can-interact:hover {
    background-color: var(--md-sys-color-primary-container);
    cursor: pointer;
}

#member-list li.can-interact:hover .member-name,
#member-list li.can-interact:hover .member-role,
#member-list li.can-interact:hover .member-player-status {
    color: var(--md-sys-color-on-primary-container);
}

#member-list li.is-self .member-name {
    font-weight: bold;
}


#member-context-menu {
    display: none;
    position: absolute;
    z-index: 10000;
    background-color: var(--md-sys-color-surface);
    border-radius: 12px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
    padding: 8px 0;
    min-width: 200px;
    overflow: hidden;
}

#member-context-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#member-context-menu ul li {
    padding: 10px 18px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--md-sys-color-on-surface);
    display: flex;
    align-items: center;
    gap: 12px;
    transition: background-color var(--animation-duration-short) var(--animation-easing);
}

#member-context-menu ul li:hover {
    background-color: var(--md-sys-color-surface-variant);
}

#member-context-menu ul li .material-icons {
    font-size: 18px;
    color: var(--md-sys-color-secondary);
}


.panel-section button,
.panel-section input[type="text"],
.panel-section input[type="password"],
.panel-section input[type="file"] {
    width: 100%;
    max-width: none;
}

#danmaku-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#danmaku-input {
    flex-grow: 1;
}


.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.55);
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity var(--animation-duration-medium) var(--animation-easing);
}

.modal.visible {
    display: flex;
    opacity: 1;
}

.modal-content {
    background-color: var(--md-sys-color-surface);
    padding: 28px;
    border-radius: 24px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15), 0 6px 10px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 420px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 18px;
    transform: scale(0.95) translateY(10px);
    transition: transform var(--animation-duration-medium) var(--animation-easing),
        opacity var(--animation-duration-medium) var(--animation-easing);
}

.modal.visible .modal-content {
    transform: scale(1) translateY(0);
}

.modal-content h3 {
    margin-top: 0;
    color: var(--md-sys-color-primary);
    font-size: 1.5em;
}

.modal-content p {
    color: var(--md-sys-color-on-surface-variant);
    line-height: 1.7;
    margin-bottom: 0;
}

#local-file-modal .modal-content input[type="file"],
#local-file-modal .modal-content button {
    align-self: center;
}

#local-file-modal .modal-content input[type="file"] {
    max-width: 280px;
}


#banner-notification,
#lag-notification-banner {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%) translateY(-150%);
    min-width: 300px;
    max-width: 90%;
    background-color: var(--md-sys-color-inverse-surface);
    color: var(--md-sys-color-inverse-on-surface);
    padding: 12px 18px;
    text-align: center;
    z-index: 9999;
    border-radius: 0 0 12px 12px;
    box-shadow: 0 3px 7px rgba(0, 0, 0, 0.18);
    transition: transform var(--animation-duration-medium) var(--animation-easing);
    font-weight: 500;
    font-size: 0.9375rem;
}

#banner-notification.show,
#lag-notification-banner.show {
    transform: translateX(-50%) translateY(0);
}

#lag-notification-banner {
    background-color: var(--md-sys-color-error-container);
    color: var(--md-sys-color-on-error-container);
}

.hidden-visually {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.d-none {
    display: none !important;
}