* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #111;
    color: white;
    font-family: Arial, sans-serif;
    overflow: hidden;
}

.screen {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hidden {
    display: none !important;
}

h1 {
    font-size: 48px;
    margin-bottom: 10px;
}

button {
    border: none;
    border-radius: 8px;
    padding: 14px 24px;
    margin: 8px;
    font-size: 18px;
    cursor: pointer;
}

button:hover {
    transform: scale(1.03);
}

#createCellButton {
    margin-top: 30px;
}

.choices {
    display: flex;
    gap: 30px;
    margin-top: 30px;
}

.cellChoice {
    width: 280px;
    height: 220px;
}

.cellChoice h2 {
    font-size: 28px;
}

/* =========================
   TEMPLATE MENU
   ========================= */

.templateChoice {
    width: 280px;
    height: 220px;
}

.templateChoice h2 {
    font-size: 26px;
}

.templateChoice p {
    font-size: 16px;
}

/* =========================
   CELL EDITOR
   ========================= */

#editor {
    width: 100vw;
    height: 100vh;
}

.topBar {
    width: 95vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.editorLayout {
    width: 95vw;
    height: 80vh;
    display: flex;
    gap: 20px;
}

.tools {
    width: 250px;
    padding: 20px;
    background: #1d1d1d;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
}

.tools h2 {
    margin-top: 0;
}

.organelleButton {
    width: 100%;
    margin: 5px 0;
}

#startSimulation {
    margin-top: auto;
}

.canvasContainer {
    flex: 1;
    min-width: 0;
    min-height: 0;
    background: #080808;
    border: 2px solid #333;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#cellCanvas {
    width: 90%;
    height: 90%;
}

/* =========================
   SIMULATION
   ========================= */

#simulation {
    width: 100vw;
    height: 100vh;
}

.simulationBar {
    height: 70px;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #1b1b1b;
}

.simulationBar h1 {
    font-size: 28px;
    margin: 0;
}

#simulationCanvas {
    display: block;
    width: 100vw;
    height: calc(100vh - 70px);
    background: #050505;
}

#menuBackground {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background: #050505;
    pointer-events: none
}

#mainMenu {
    position: relative;
    z-index: 10;
}

#menuBackground.hidden {
    display: none
}

#deathPopup {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

#deathPopup.hidden {
    display: none;
}

#deathPopupBox {
    background: #1d1d1d;
    padding: 35px;
    border-radius: 15px;
    text-align: center;
    width: 400px;
    max-width: 90vw;
}

#deathPopupBox h2 {
    margin-top: 0;
    font-size: 32px;
}

#deathReason {
    font-size: 18px;
    margin: 20px 0;
}