:root {
    --bg: #f5f7f8;
    --panel: #ffffff;
    --panel-border: #d7dde1;
    --text: #192025;
    --muted: #69757d;
    --green: #137349;
    --green-dark: #0c5134;
    --blue: #1d7fc0;
    --shadow: 0 10px 30px rgba(18, 28, 38, 0.12);
    --radius: 8px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.center-wrapper {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 10px;
    width: 100vw;
    height: 100dvh;
    padding: 10px;
    overflow: hidden;
}

.title-canvas {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

.title {
    flex: 0 0 auto;
    margin: 0 0 10px;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0;
}

.drawing-container {
    width: min(100%, calc(100dvh - 94px));
    max-width: 100%;
    max-height: calc(100dvh - 94px);
    aspect-ratio: 1;
    flex: 0 1 auto;
    border: 2px solid #111;
    background: #fff;
    box-shadow: var(--shadow);
    overflow: hidden;
    cursor: grab;
    user-select: none;
    touch-action: none;
}

.drawing-container:active {
    cursor: grabbing;
}

.drawing-container svg {
    display: block;
    width: 100%;
    height: 100%;
}

#lissajousCanvas {
    display: none;
}

.zoom-controls {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.zoom-button,
.common-button,
.downloadlink {
    min-height: 34px;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 7px 12px;
    font-size: 15px;
    line-height: 1;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
}

.zoom-button,
.common-button,
.downloadlink {
    background: var(--green);
    color: #fff;
}

.zoom-button:hover,
.common-button:hover,
.downloadlink:hover {
    background: var(--green-dark);
}

.zoom-level {
    min-width: 66px;
    padding: 7px 10px;
    border: 1px solid var(--panel-border);
    border-radius: 6px;
    background: #fff;
    color: var(--text);
    font-size: 14px;
    font-weight: 700;
    text-align: center;
}

.control-container {
    min-width: 0;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 2px 2px 10px 2px;
}

.control-section {
    margin-bottom: 10px;
    padding: 10px;
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    background: var(--panel);
    box-shadow: 0 4px 14px rgba(18, 28, 38, 0.06);
    min-width: 0;
}

.section-title {
    margin: 0 0 8px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

.control-group,
.control-group1,
.control-ab,
.control-color,
.control-lineWidth,
.download-section,
.social-section {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.control-group1 {
    flex-direction: column;
    align-items: stretch;
}

.range-control {
    display: grid;
    grid-template-columns: 28px 76px minmax(160px, 1fr);
    align-items: center;
    gap: 8px;
    min-height: 34px;
    min-width: 0;
}

.range-control label,
.control-lineWidth label,
.color-control label {
    color: var(--text);
    font-size: 14px;
    font-weight: 700;
}

.param-input {
    width: 76px;
    height: 32px;
    padding: 4px 6px;
    border: 1px solid var(--panel-border);
    border-radius: 6px;
    background: #fff;
    color: var(--text);
    font-size: 15px;
    text-align: right;
}

.param-slider {
    width: 100%;
    min-width: 0;
    accent-color: var(--green);
}

.control-ab,
.control-color,
.download-section,
.social-section {
    flex-wrap: wrap;
}

.control-group4 {
    display: grid;
    grid-template-columns: minmax(0, auto) minmax(0, 1fr);
    align-items: center;
    column-gap: 14px;
    min-width: 0;
}

.control-group4 .section-title {
    grid-column: 1 / -1;
}

.control-group4 .download-section {
    justify-content: flex-start;
}

.control-group4 .social-section {
    justify-content: flex-end;
}

.checkbox-container {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    min-height: 34px;
    color: var(--text);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
}

.animation-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.duration-control {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    min-height: 34px;
    color: var(--text);
    font-size: 15px;
    font-weight: 700;
}

.duration-control input {
    width: 68px;
    height: 32px;
    padding: 4px 6px;
    border: 1px solid var(--panel-border);
    border-radius: 6px;
    font-size: 15px;
    text-align: right;
}

.animation-progress-row {
    display: grid;
    grid-template-columns: auto minmax(160px, 1fr);
    align-items: center;
    gap: 10px;
    margin-top: 9px;
    color: var(--text);
    font-size: 14px;
    font-weight: 700;
}

.animation-progress-row input {
    width: 100%;
    accent-color: var(--green);
}

.animation-status {
    margin-top: 7px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

.common-checkbox {
    width: 21px;
    height: 21px;
    accent-color: var(--green);
}

.color-control {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

input[type="color"] {
    width: 46px;
    height: 32px;
    padding: 2px;
    border: 1px solid var(--panel-border);
    border-radius: 6px;
    background: #fff;
}

.control-lineWidth {
    margin-top: 9px;
    display: grid;
    grid-template-columns: 58px 76px minmax(160px, 1fr);
}

.twitter-button {
    background: var(--blue);
}

.twitter-button:hover {
    background: #0d649c;
}

.x-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 5px;
    font-weight: 900;
    line-height: 1;
}

.twitter-link-button,
.version-link-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 7px 11px;
    border: 1px solid rgba(7, 91, 56, 0.28);
    border-radius: 6px;
    background: #fff;
    color: var(--green-dark);
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.twitter-link-button:hover,
.version-link-button:hover {
    transform: translateY(-1px);
    border-color: var(--green);
    background: #eff8f3;
}

.developer-logo-link {
    display: inline-flex;
    align-items: center;
    width: 178px;
    max-width: 100%;
    padding: 3px 5px;
    border: 1px solid #222;
    border-radius: 6px;
    background: #000;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.developer-logo-link:hover {
    transform: translateY(-1px);
    border-color: var(--green);
}

.developer-logo-link img {
    display: block;
    width: 100%;
    height: auto;
}

@media (min-width: 900px) {
    .control-container {
        padding-right: 6px;
    }
}

@media (max-width: 899px) and (orientation: portrait) {
    .center-wrapper {
        display: grid;
        grid-template-columns: 1fr;
        grid-template-rows: minmax(0, 52dvh) minmax(0, 1fr);
        height: 100dvh;
        overflow: hidden;
        padding: 10px;
    }

    .title {
        font-size: 18px;
    }

    .drawing-container {
        width: min(100%, calc(52dvh - 62px));
        max-height: calc(52dvh - 62px);
    }

    .control-container {
        min-height: 0;
        overflow-y: auto;
        overflow-x: hidden;
        padding: 0 2px 10px 0;
    }

    .control-section {
        padding: 10px;
    }

    .range-control {
        grid-template-columns: 24px 70px minmax(0, 1fr);
        gap: 7px;
    }

    .control-lineWidth {
        grid-template-columns: 52px 70px minmax(0, 1fr);
    }

    .param-input {
        width: 70px;
    }

    .common-button,
    .downloadlink,
    .zoom-button {
        min-height: 32px;
        padding: 6px 10px;
        font-size: 14px;
    }

    .developer-logo-link {
        width: min(58vw, 260px);
    }

    .control-group4 {
        display: block;
    }

    .control-group4 .download-section,
    .control-group4 .social-section {
        justify-content: flex-start;
    }

    .control-group4 .social-section {
        margin-top: 8px;
    }
}

@media (max-height: 560px) and (orientation: landscape) {
    .center-wrapper {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 8px;
        padding: 8px;
    }

    .title {
        margin-bottom: 6px;
        font-size: 15px;
    }

    .drawing-container {
        width: min(100%, calc(100dvh - 66px));
        max-height: calc(100dvh - 66px);
    }

    .zoom-controls {
        margin-top: 6px;
    }

    .control-section {
        margin-bottom: 8px;
        padding: 8px;
    }

    .section-title {
        margin-bottom: 6px;
        font-size: 12px;
    }

    .range-control {
        grid-template-columns: 24px 66px minmax(120px, 1fr);
        min-height: 28px;
    }

    .param-input {
        width: 66px;
        height: 28px;
        font-size: 13px;
    }

    .common-button,
    .downloadlink,
    .zoom-button {
        min-height: 28px;
        padding: 5px 8px;
        font-size: 13px;
    }

    .duration-control,
    .animation-status {
        font-size: 12px;
    }

    .duration-control input {
        width: 58px;
        height: 28px;
        font-size: 13px;
    }

    input[type="color"] {
        width: 40px;
        height: 28px;
    }

    .developer-logo-link {
        width: 150px;
    }

    .control-group4 {
        grid-template-columns: auto 1fr;
        column-gap: 8px;
    }
}