/* GIAO DIỆN SOFT BRUTALISM & NAMESPACED - GEOMETRY CALCULATOR */
.geomcalc-container {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    max-width: 1100px; margin: 20px auto;
    border: 3px solid #111111; border-radius: 12px;
    box-shadow: 6px 6px 0px #111111; padding: 30px;
    background: #ffffff; color: #111111; box-sizing: border-box;
}

.geomcalc-container * { box-sizing: border-box; }

.geomcalc-title {
    font-family: 'Montserrat', sans-serif; font-size: 2rem; text-align: center;
    text-transform: uppercase; margin-top: 0; margin-bottom: 10px; font-weight: 900;
}

.geomcalc-desc { text-align: center; color: #444; font-weight: 600; margin-bottom: 30px; line-height: 1.5; }

.geomcalc-layout { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }

.geomcalc-panel-heading {
    margin: 0 0 15px 0; font-family: 'Montserrat', sans-serif; font-size: 1.1rem;
    border-bottom: 3px dashed #111; padding-bottom: 10px; text-align: center;
}

/* Cột Nhập Liệu */
.geomcalc-input-panel {
    background-color: #f9f9f9; border: 3px solid #111; border-radius: 10px;
    padding: 20px; box-shadow: 4px 4px 0px #111; display: flex; flex-direction: column;
}

.geomcalc-label { display: block; font-weight: 800; font-size: 0.95rem; margin-bottom: 8px; color: #111; }

.geomcalc-select {
    width: 100%; padding: 12px; font-size: 1rem; font-weight: 700; font-family: 'Inter', sans-serif;
    border: 3px solid #111; border-radius: 6px; outline: none; background-color: #fdfd96;
    margin-bottom: 20px; cursor: pointer; box-shadow: 2px 2px 0px #111;
}

.geomcalc-input-group { margin-bottom: 15px; }
.geomcalc-input {
    width: 100%; padding: 12px; font-size: 1.2rem; font-weight: 800; font-family: 'Courier New', Courier, monospace;
    border: 3px solid #111; border-radius: 6px; outline: none; background-color: #fff; box-shadow: inset 2px 2px 0px rgba(0,0,0,0.05);
}
.geomcalc-input:focus { border-color: #2d7bb5; background-color: #e6f7ff; }

.geomcalc-btn-reset {
    margin-top: auto; background-color: #eceae4; font-family: 'Montserrat', sans-serif;
    font-weight: 900; font-size: 1rem; padding: 12px; border: 3px solid #111; border-radius: 6px;
    cursor: pointer; box-shadow: 3px 3px 0px #111; transition: transform 0.1s;
}
.geomcalc-btn-reset:active { transform: translate(3px, 3px); box-shadow: 0px 0px 0px #111; }

/* Cột Canvas */
.geomcalc-visual-panel {
    background-color: #ffffff; border: 3px solid #111; border-radius: 10px;
    padding: 20px; box-shadow: 4px 4px 0px #111; display: flex; flex-direction: column;
}

.geomcalc-canvas-wrap {
    flex: 1; border: 3px dashed #111; border-radius: 8px; background-color: #f4f4f4;
    display: flex; justify-content: center; align-items: center; position: relative;
    overflow: hidden; background-image: radial-gradient(#ccc 1px, transparent 1px); background-size: 20px 20px;
}

canvas { display: block; z-index: 2; }

.geomcalc-fallback {
    position: absolute; font-weight: 700; color: #888; z-index: 1; font-style: italic; text-align: center;
}

/* Cột Kết Quả */
.geomcalc-result-panel {
    background-color: #e6f7ff; border: 3px solid #111; border-radius: 10px;
    padding: 20px; box-shadow: 4px 4px 0px #111;
}

.geomcalc-results-area { display: flex; flex-direction: column; gap: 15px; }

.geomcalc-result-box { background-color: #fff; border: 3px solid #111; border-radius: 8px; padding: 15px; box-shadow: 2px 2px 0px #111; }
.geomcalc-result-name { font-size: 0.9rem; font-weight: 800; color: #555; text-transform: uppercase; margin-bottom: 5px; }
.geomcalc-result-val { font-family: 'Montserrat', monospace; font-size: 1.8rem; font-weight: 900; color: #e05a47; word-break: break-all; }
.geomcalc-result-formula { font-size: 0.85rem; color: #2d7bb5; margin-top: 5px; font-weight: 600; font-family: monospace;}

.geomcalc-empty { font-weight: 600; color: #666; font-style: italic; text-align: center; margin-top: 20px; }

@media (max-width: 900px) {
    .geomcalc-layout { grid-template-columns: 1fr; }
    .geomcalc-canvas-wrap { height: 250px; }
}