:root {
    --input-focus: #2d8cf0;
    --font-color: #323232;
    --font-color-sub: #666;
    --bg-color: #fff;
    --panel-color: lightgrey;
    --page-color: #e8e8e8;
    --main-color: #323232;
    --danger-color: #b42318;
    --panel-background: var(--panel-color);
    --field-background: var(--bg-color);
    --control-background: var(--bg-color);
    --control-hover: #f4f4f4;
    --panel-radius: 5px;
    --panel-shadow: 4px 4px var(--main-color);
    --field-radius: 5px;
    --field-shadow: 4px 4px var(--main-color);
    --control-radius: 5px;
    --control-shadow: 4px 4px var(--main-color);
    --primary-background: var(--bg-color);
    --primary-hover: #f4f4f4;
    --primary-color: var(--font-color);
    --image-blend-mode: multiply;
}

* {
    box-sizing: border-box;
}

.app-body {
    min-height: 100vh;
    margin: 0;
    padding: 48px 20px;
    display: block;
    background: var(--page-color);
    color: var(--font-color);
    font-family: Inter, Arial, sans-serif;
    transition: background-color 180ms ease-out, color 180ms ease-out;
}

button,
input {
    font: inherit;
}

button {
    color: inherit;
    touch-action: manipulation;
}

.hidden {
    display: none !important;
}

.app-header,
.app-shell {
    width: min(100%, 760px);
    margin-inline: auto;
}

.app-header {
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    text-align: left;
}

.title-lockup {
    display: flex;
    align-items: center;
    gap: 18px;
}

.header-icon {
    width: 48px;
    height: 48px;
    flex: 0 0 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--field-background);
    border: 2px solid var(--main-color);
    border-radius: 50%;
    box-shadow: var(--control-shadow);
    color: var(--font-color);
}

.header-icon svg {
    width: 32px;
    height: 32px;
}

.app-title {
    margin: 0;
    color: var(--font-color);
    font-size: clamp(28px, 5vw, 40px);
    font-weight: 900;
    line-height: 1.08;
    letter-spacing: -0.04em;
}

.app-shell,
.result-card {
    display: grid;
    gap: 20px;
}

.uiverse-panel {
    padding: 20px;
    background: var(--panel-background);
    border: 2px solid var(--main-color);
    border-radius: var(--panel-radius);
    box-shadow: var(--panel-shadow);
    backdrop-filter: none;
}

.input-panel {
    padding: 24px;
}

.input-row {
    display: flex;
    align-items: flex-end;
}

.input-column {
    flex: 1;
    min-width: 0;
}

.input-wrap {
    position: relative;
}

.uiverse-input {
    width: 100%;
    height: 54px;
    padding: 5px 48px 5px 14px;
    background: var(--field-background);
    border: 2px solid var(--main-color);
    border-radius: var(--field-radius);
    box-shadow: var(--field-shadow);
    color: var(--font-color);
    font-family: "Fira Code", monospace;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.08em;
    outline: none;
}

.uiverse-input::placeholder {
    color: var(--font-color-sub);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0;
    opacity: 0.8;
}

.uiverse-input:focus {
    border-color: var(--input-focus);
}

.uiverse-button,
.copy-button {
    cursor: pointer;
    background: var(--control-background);
    border: 2px solid var(--main-color);
    border-radius: var(--control-radius);
    box-shadow: var(--control-shadow);
    color: var(--font-color);
    font-weight: 700;
    transition: transform 120ms cubic-bezier(0.2, 0, 0, 1),
        box-shadow 120ms cubic-bezier(0.2, 0, 0, 1),
        background-color 120ms cubic-bezier(0.2, 0, 0, 1);
}

.uiverse-button:hover,
.copy-button:hover {
    background: var(--control-hover);
}

.uiverse-button:active,
.copy-button:active {
    box-shadow: 0 0 var(--main-color);
    transform: translate(3px, 3px);
}

#decodeBtn {
    background: var(--primary-background);
    color: var(--primary-color);
}

#decodeBtn:hover {
    background: var(--primary-hover);
}

.uiverse-button:focus-visible,
.copy-button:focus-visible {
    outline: 3px solid var(--input-focus);
    outline-offset: 3px;
}

.uiverse-button {
    min-height: 54px;
    padding: 10px 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    white-space: nowrap;
    font-size: 14px;
}

.clear-button {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    padding: 5px;
    border: 0;
    background: transparent;
    box-shadow: none;
    color: var(--font-color-sub);
    cursor: pointer;
}

.clear-button:active {
    transform: translateY(-50%) scale(0.96);
}

.clear-button svg {
    width: 20px;
    height: 20px;
}

.input-actions {
    width: 0;
    margin-left: 0;
    display: flex;
    opacity: 0;
    overflow: visible;
    pointer-events: none;
    visibility: hidden;
    transform: translateX(-18px) scaleX(0.45) scaleY(0.78);
    transform-origin: left center;
    transition: width 240ms cubic-bezier(0.22, 1, 0.36, 1),
        margin-left 240ms cubic-bezier(0.22, 1, 0.36, 1),
        opacity 120ms ease-out,
        transform 240ms cubic-bezier(0.22, 1, 0.36, 1),
        visibility 0s linear 240ms;
}

.input-actions.is-visible {
    width: 84px;
    margin-left: 20px;
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
    transform: translateX(0) scale(1);
    transition-delay: 0s;
}

.input-error {
    margin-top: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--danger-color);
    font-size: 12px;
    font-weight: 700;
}

.input-error svg {
    width: 14px;
    height: 14px;
}