body {
    margin: 0;
    padding: 0;
    font-family: "Plus Jakarta Sans", sans-serif;
    overflow: hidden;
    background: #4a4a4a;
}

.full-screen {
    width: 100vw;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

#pdf-canvas {
    position: absolute;
    top: 0;
    left: 0;
}

/* Fabric.js creates .canvas-container wrapper automatically */
#pdf-container .canvas-container {
    position: absolute !important;
    top: 0;
    left: 0;
}

/* ── Toolbar ── */
.tooltray {
    position: fixed;
    left: 50%;
    bottom: 16px;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    align-items: center;
    padding: 6px;
    background: rgb(200, 200, 200);
    border: 1px solid rgb(175, 175, 175);
    border-radius: 4px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
    z-index: 1000;
}

.tooltray__btn {
    box-sizing: border-box;
    width: 32px;
    height: 32px;
    border: 1px solid rgb(125, 125, 125);
    background: rgb(150, 150, 150);
    padding: 4px;
    border-radius: 2px;
    cursor: pointer;
    user-select: none;
    transition: box-shadow .15s ease, transform .04s ease, background .15s ease, border-color .15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.tooltray__btn:active {
    transform: translateY(1px);
}

.tooltray__btn.pressed {
    background: rgb(150, 150, 150);
    border-color: #6366f1;
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, .4), 0 0 0 2px rgba(99, 102, 241, .35);
    transform: translateY(1px);
}

.tooltray__btn.saved {
    border-color: #22c55e;
    box-shadow: 0 0 0 2px rgba(34, 197, 94, .4);
}

.tooltray__separator {
    width: 1px;
    height: 24px;
    background: rgb(125, 125, 125);
    margin: 0 2px;
}

/* Download dropdown menu */
.download-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.download-menu {
    position: absolute;
    bottom: calc(100% + 6px);
    right: 0;
    background: rgb(220, 220, 220);
    border: 1px solid rgb(175, 175, 175);
    border-radius: 4px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
    padding: 4px;
    display: flex;
    flex-direction: column;
    min-width: 200px;
    z-index: 1001;
}

.download-menu[hidden] {
    display: none;
}

.download-menu a {
    display: block;
    padding: 8px 12px;
    color: #222;
    text-decoration: none;
    font-size: 13px;
    border-radius: 2px;
    white-space: nowrap;
    cursor: pointer;
}

.download-menu a:hover {
    background: rgb(175, 175, 175);
}

/* Color picker inside toolbar */
.color-btn {
    position: relative;
    overflow: hidden;
}

.color-btn input[type="color"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* ── Page navigation ── */
#page-nav {
    position: fixed;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 6px 12px;
    background: rgb(200, 200, 200);
    border: 1px solid rgb(175, 175, 175);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, .2);
    z-index: 1000;
    font-size: 14px;
    color: #222;
}

#page-nav button {
    border: 1px solid rgb(125, 125, 125);
    background: rgb(150, 150, 150);
    color: #222;
    padding: 2px 8px;
    border-radius: 2px;
    cursor: pointer;
    font-size: 14px;
}

#page-nav button:hover {
    background: rgb(175, 175, 175);
}

.nav-separator {
    width: 1px;
    height: 16px;
    background: rgb(125, 125, 125);
}

#zoom-info {
    min-width: 40px;
    text-align: center;
    font-size: 12px;
    color: #555;
}

/* ── File selector ── */
#file-selector {
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 1000;
}

#file-selector select {
    padding: 6px 10px;
    border: 1px solid rgb(175, 175, 175);
    border-radius: 4px;
    background: rgb(200, 200, 200);
    font-size: 13px;
    color: #222;
}

/* ── Calibration dialog ── */
#calibration-dialog {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 3000;
    align-items: center;
    justify-content: center;
}

.calib-inner {
    background: #fff;
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, .3);
    min-width: 300px;
    max-width: 400px;
}

.calib-inner h3 {
    margin: 0 0 12px;
    font-size: 18px;
}

.calib-inner p {
    margin: 0 0 16px;
    font-size: 14px;
    color: #555;
}

.calib-row {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.calib-scale-row {
    align-items: center;
    flex-wrap: wrap;
}

.calib-scale-row input {
    min-width: 60px;
}

.calib-eq {
    font-size: 18px;
    font-weight: bold;
    color: #555;
    padding: 0 4px;
}

.calib-btn-alt {
    display: block;
    width: 100%;
    margin: 12px 0 16px;
    padding: 10px 14px;
    border: 1px solid #c7c9d1;
    border-radius: 4px;
    background: #f3f4f6;
    color: #333;
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    text-align: center;
}

.calib-btn-alt:hover {
    background: #e5e7eb;
    border-color: #9ca3af;
}

.calib-row input {
    flex: 1;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
}

.calib-row select {
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
}

.calib-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.calib-btn-ok, .calib-btn-cancel {
    padding: 8px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.calib-btn-ok {
    background: #6366f1;
    color: #fff;
}

.calib-btn-ok:hover {
    background: #4f46e5;
}

.calib-btn-cancel {
    background: #e5e7eb;
    color: #333;
}

.calib-btn-cancel:hover {
    background: #d1d5db;
}

/* ── Responsive ── */
@media (max-width: 700px) {
    .tooltray {
        gap: 3px;
        padding: 4px;
        bottom: 8px;
        flex-wrap: wrap;
        max-width: 95vw;
        justify-content: center;
    }

    .tooltray__btn {
        width: 28px;
        height: 28px;
    }
}