#edit-screen {
    background-color: var(--bg-color);
    transition: background-color 0.3s;
}

#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

#canvas-container canvas {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 100vw;
    max-height: 100vh;
    transition: all 0.3s ease-in-out;
}

#edit-ui {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 10;
    background-color: var(--ui-bg);
    transition: opacity 0.3s, visibility 0.3s, background-color 0.3s;
    padding-bottom: env(safe-area-inset-bottom);
}

#edit-ui.hidden {
    opacity: 0;
    visibility: hidden;
}

#main-nav {
    display: flex;
    justify-content: space-around;
    padding: 15px 0;
    border-top: 1px solid rgba(128, 128, 128, 0.2);
    align-items: center;
    min-height: 60px;
}

.nav-btn {
    display: flex;
    align-items: center;
    background: none;
    border: none;
    color: var(--text-color);
    padding: 5px 15px;
    cursor: pointer;
    border-radius: 8px;
    font-size: 14px;
}

.nav-btn .icon {
    width: 20px;
    height: 20px;
    margin-right: 8px;
}

.nav-btn.active {
    background-color: var(--nav-active-bg);
    color: var(--accent-color);
}

.nav-btn.active .icon {
    color: var(--accent-color);
}

#sub-nav-container {
    overflow-x: auto;
    white-space: nowrap;
}

.sub-nav {
    display: flex;
    padding: 15px 15px;
    min-height: 60px;
    align-items: center;
}

.sub-nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 5px 8px;
    border-radius: 8px;
    flex-shrink: 0;
    box-sizing: border-box;
    flex: 0 0 80px;
    max-width: 80px;
    min-width: 80px;
}

.sub-nav-btn .icon {
    width: 20px;
    height: 20px;
    margin-bottom: 5px;
}

.sub-nav-btn span {
    font-size: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: normal;
    line-height: 1.1em;
    max-height: 2.2em;
    text-align: center;
}

.sub-nav-btn.active {
    color: var(--accent-color);
}

.sub-nav-btn.edited {
    color: var(--accent-color);
    font-weight: bold;
}

.param-controls {
    padding: 15px 15px 0 15px;
    max-height: 236px;
    overflow-y: auto;
}

.param-controls.white-balance-controls {
    max-height: 400px;
}

.param-item {
    display: flex;
    align-items: center;
    margin-bottom: 0;
    transition: opacity 0.2s ease;
}

.param-preview {
    width: 40px;
    height: 40px;
    background: #ccc;
    border-radius: 4px;
    margin-right: 15px;
    margin-bottom: 8px;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.param-preview canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slider-container {
    flex-grow: 1;
    margin-right: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.slider-container .param-label {
    font-size: 13px;
    margin-bottom: 4px;
}

.param-value-top {
    position: absolute;
    top: 17%;
    transform: translateY(-50%);
    right: 0;
    width: 44px;
    padding: 4px;
    box-sizing: border-box;
    line-height: 1;
}

.slider-container .custom-slider {
    width: 100%;
}

.custom-slider-thumb {
    width: 18px !important;
    height: 18px !important;
    top: 6px !important;
    margin-top: 0 !important;
}

.param-item {
    align-items: center;
}

.param-item .param-preview,
.param-item .param-value,
.param-item .param-label {
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

#sub-nav-container,
#main-nav,
#preset-bar,
#theme-toggle-btn,
#account-btn,
#presets-btn,
#download-btn,
#login-bar,
.crop-btn {
    transition: opacity 0.2s ease;
}

.white-balance-controls .white-balance-extras,
.white-balance-controls .white-balance-wheel,
.white-balance-controls .white-balance-extras .pill-btn,
.white-balance-controls .white-balance-swatch {
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--slider-track);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: var(--slider-thumb);
    border-radius: 50%;
    border: 3px solid var(--bg-color);
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
    cursor: grab;
}

input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: var(--slider-thumb);
    border-radius: 50%;
    border: 3px solid var(--bg-color);
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
    cursor: grab;
}

.param-value {
    width: 50px;
    padding: 5px;
    font-size: 14px;
    text-align: center;
    background: var(--btn-bg);
    border: 1px solid var(--slider-track);
    color: var(--text-color);
    border-radius: 5px;
}

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

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

body.slider-dragging {
    cursor: grabbing;
}

body.slider-dragging #edit-ui {
    background-color: transparent;
    backdrop-filter: none;
}

body.fullscreen-ui-hidden #edit-ui,
#edit-ui.fullscreen-ui-hidden {
    opacity: 0;
    pointer-events: none;
    background-color: transparent;
    backdrop-filter: none;
    transition: opacity 0.3s;
}

body.slider-dragging #sub-nav-container,
body.slider-dragging #main-nav,
body.slider-dragging #preset-bar,
body.slider-dragging #theme-toggle-btn,
body.slider-dragging #account-btn,
body.slider-dragging #presets-btn,
body.slider-dragging #download-btn,
body.slider-dragging #login-bar,
body.slider-dragging .crop-btn,
body.fullscreen-ui-hidden #sub-nav-container,
body.fullscreen-ui-hidden #main-nav,
body.fullscreen-ui-hidden #preset-bar,
body.fullscreen-ui-hidden #theme-toggle-btn,
body.fullscreen-ui-hidden #account-btn,
body.fullscreen-ui-hidden #presets-btn,
body.fullscreen-ui-hidden #download-btn,
body.fullscreen-ui-hidden #login-bar,
body.fullscreen-ui-hidden .crop-btn {
    opacity: 0;
    pointer-events: none;
}

body.slider-dragging .param-controls .param-item {
    opacity: 0;
    pointer-events: none;
}

body.fullscreen-ui-hidden .param-controls .param-item {
    opacity: 0;
    pointer-events: none;
}

body.slider-dragging .param-controls .param-item.active-slider {
    opacity: 1;
    pointer-events: auto;
}

body.slider-dragging #main-nav,
body.slider-dragging #sub-nav-container,
body.slider-dragging #preset-bar,
body.slider-dragging .param-controls,
body.fullscreen-ui-hidden #main-nav,
body.fullscreen-ui-hidden #sub-nav-container,
body.fullscreen-ui-hidden #preset-bar,
body.fullscreen-ui-hidden .param-controls {
    background-color: transparent;
}

body.slider-dragging #main-nav,
body.fullscreen-ui-hidden #main-nav {
    border-top-color: transparent;
}

body.slider-dragging .param-controls .param-item.active-slider .param-preview,
body.slider-dragging .param-controls .param-item.active-slider .param-value,
body.slider-dragging .param-controls .param-item.active-slider .param-label {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

body.slider-dragging .white-balance-controls .white-balance-extras > *,
body.fullscreen-ui-hidden .white-balance-controls .white-balance-extras > * {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

body.slider-dragging .white-balance-controls .white-balance-extras .active-slider {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

#canvas-container .loading-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    color: #ffffff;
    padding: 15px 25px;
    border-radius: 8px;
    z-index: 5;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    pointer-events: none;
}

#canvas-container.is-loading-full-res .loading-overlay {
    opacity: 1;
    visibility: visible;
}

#download-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

@media (max-width: 600px) {
    .nav-btn {
        flex-direction: column;
        font-size: 10px;
        padding: 5px;
        align-items: center;
        justify-content: center;
    }

    .nav-btn .icon {
        margin-right: 0;
        margin-bottom: 2px;
    }

    #main-nav {
        padding: 12px 0;
        min-height: 50px;
    }

    .sub-nav {
        padding: 12px 15px;
        min-height: 50px;
    }

    .sub-nav-btn {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        font-size: 10px;
        padding: 5px;
    }

    .sub-nav-btn .icon {
        margin-right: 0;
        margin-bottom: 2px;
        width: 20px;
        height: 20px;
    }

    .sub-nav-btn span {
        font-size: 10px;
    }

    .sub-nav-btn.active {
        background-color: var(--nav-active-bg);
        color: var(--accent-color);
    }

    .sub-nav-btn.active .icon {
        color: var(--accent-color);
    }
}