@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap');
* {
    box-sizing: border-box;
}
body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI" , "Helvetica Neue" , sans-serif;
    background: #10141d;
    color: #edf2fa;
}

.topbar {
    position: relative;
    min-height: 125px;
    padding: 12px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;

    background-color: #171717;
    background-image:
        linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255,255,0.035) 1px, transparent 1px);
    background-size: 32px 32px;

    border-bottom: 8px solid #39b875;
}

.topbar h1 {
    margin: 0;
    color: #39b875;
    font-family: 'Press Start 2P' monospace;
    font-size: clamp(18px, 2.5vw, 32px);
    line-height: 1.4;
    text-transform: uppercase;
}

.topbar p {
    margin: 5px 0 0;
    color: #ffffff;
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
}

#toggle-intersections {
    position: absolute;
    bottom: 12px;
    right: 24px;
    left: auto;
    top: auto;
    padding: 5px 8px;
    background: #ffffff;
    color: #1a2230;
    border: 1px solid #1a2230;
    border-radius: 5px;
    font-size: 11px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

#toggle-intersections.active {
    background: #3fce82;
    color: #ffffff;
}

#toggle-intersections.inactive {
    background: #ffffff;
    color: #1a2230;
}

.app {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    min-height: calc(100vh - 90px);
}

.toolbar {
    padding: 18px;
    background: #3fce82;
    background-image:
        linear-gradient(rgba(5, 12, 30, 0.48), rgba(5, 12, 30, 0.48)),
        url("toolbar-background.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border-right: 3px solid #39b875;
}

.toolbar h2 {
    margin-top: 0;
    margin-bottom: 22px;
    color: #39b875;
    font-family: 'Press Start 2P', monospace;
    font-size: 13px;
    line-height: 1.8;
    text-align: center;
    text-transform: uppercase;
}

.toolbar button {
    display: block;
    width: 100%;
    margin: 10px 0;
    padding: 12px 8px;

    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    line-height: 1.8;
    text-align: center;

    color: #39b875;
    background: #101a32;
    border: 2px solid #287d58;
    border-radius: 2px;

    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s;
}

.toolbar button:hover {
    background: #1c3b3b;
    border-color: #39b875;
    color: #ffffff;
}

.toolbar button.active {
    background: #39b875;
    border-color: #8affb9;
    color: #101a32;
}

#status {
    margin-top: 22px;
    color: #fbfdff;
    font-size: 13px;
    line-height: 1.5;
}

.workspace {
    min-width: 0;
    min-height: 0;
    padding: 12px;
}

#canvas {
    display: block;
    width: 100%;
    height: calc(100vh - 126px);
    min-height: 480px;
    background: #0c1119;
    border: 1px solid #30394a;
    border-radius: 8px;
}

/* Mathematical coordinate plane */

/*minor grid lines */
.grid-lines {
    stroke: #283345;
    stroke-width: 1;
    stroke-opacity: 0.3;
}

/* Major grid lines */
.grid-lines-major {
    stroke: #64748b;
    stroke-width: 1.2;
    stroke-opacity: 0.65;
}

/* Coordinate axes */
.axis-line {
    stroke: #94a3b8;
    stroke-width: 1.5;
}

#canvas {
    cursor: crosshair;
    touch-action: manipulation;
}

.axis-line {
    stroke: #94a3b8;
    stroke-width: 1.5;
}

.axis-label {
    fill: #aab7cc;
    font-size: 12px;
    font-family: "Segoe UI" , "Helvetica Neue" , sans-serif;
    user-select: none;
    pointer-events: none;
}

/* Zoom controls at the bottom of the toolbar */
.zoom-controls {
    display: grid;
    grid-template-columns: 40px minmax(45px, 1fr) 40px;
    align-items: center;
    gap: 8px;
    width: 100%;
    box-sizing: border-box;
    padding: 12px 0;
    margin-top: 12px;
}

.zoom-controls button {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
    padding: 8px 4px;
    border: 1px solid #b8c4d6;
    border-radius: 6px;
    background: #ffffff;
    color: #24344d;
    font-size: 16px;
    cursor: pointer;
}

.zoom-controls button:hover {
    background: #e8eef7;
}

#zoom-level {
    text-align: center;
    white-space: nowrap;
    font-size: 14px;
    font-weight: bold;
}

/* put reset on its own row */
#zoom-reset {
    grid-column: 1 / -1;
}

#zoom-level {
    min-width: 55px;
    text-align: center;
    font-size: 14px;
    font-weight: bold;
}

/* Temporary point preview while placing geometry  */
.preview-point {
    fill: #38bdf8;
    fill-opacity: 0.45;
    stroke: #7dd3fc;
    stroke-width: 2;
    pointer-events: none;
}

/* Math Exlporer */

.math-explorer {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 300px;
    max-height: 420px;
    background: #101a32;
    color: #ffffff;
    border: 2px solid #39b875;
    border-radius: 2px;
    z-index: 1000;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}

.math-explorer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    background-color: #171717;
    background-size: 16px 16px;
    border-bottom: 2px solid #39b875;
    cursor: grab;
    user-select: none;
}

.math-explorer-header h2 {
    margin: 0;
    font-size: 17px;
}

#math-explorer-toggle {
    background: transparent;
    color: white;
    border: none;
    font-size: 22px;
    cursor: pointer;
}

.math-explorer-content {
    padding: 16px;
    overflow-y: auto;
    max-height: 340px;
}

.math-explorer-content h3 {
    margin-top: 0;
}

.math-explorer-content p {
    color: #c5ceda;
    font-size: 14px;
    line-height: 1.5;
}

#equation-library-button {
    width: 100%;
    margin-top: 12px;
    padding: 10px;
    background: #3fce82;
    color: #07120a;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
}

#equation-library-button:hover {
    background: #16e653;
}