@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;700&display=swap');

:root {
    --silt-darkest: #2d2a25;
    --silt-dark: #3a3630;
    --silt-medium: #504a43;
    --silt-text: #c9c4b5;
    --phosphor-amber: #ffba6b;
    --phosphor-amber-glow: rgba(255, 186, 107, 0.5);
    --phosphor-amber-heavy-glow: rgba(255, 186, 107, 0.7);
}

body {
    background-color: var(--silt-darkest);
    color: var(--silt-text);
    font-family: 'Fira Code', monospace;
    display: flex;
    justify-content: center;
    /* CHANGED: Remove fixed height and centered alignment to allow scrolling */
    margin: 0;
    padding: 2rem 1rem; /* Add some padding for spacing */
}

#app-container {
    display: flex;
    /* CHANGED: Main layout is now a vertical column */
    flex-direction: column; 
    gap: 2rem;
    background-color: var(--silt-dark);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 0 25px rgba(0, 0, 0, 0.5), 0 0 15px var(--phosphor-amber-glow);
    border: 1px solid var(--silt-medium);
    /* CHANGED: Set a max-width for better readability */
    max-width: 800px;
    width: 100%;
}

#canvas-container {
    position: relative;
    /* Canvas size is now controlled by JS, but we center it */
    margin: 0 auto; 
    max-width: 100%;
    background-color: #1e1c19;
    border-radius: 8px;
    overflow: hidden;
    transition: width 0.4s ease, height 0.4s ease;
    border: 1px solid #111;
}

#main-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

#drop-zone {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 2px dashed var(--silt-medium);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    z-index: 10;
    transition: background-color 0.3s, border-color 0.3s;
    background-color: rgba(30, 28, 25, 0.8);
    backdrop-filter: blur(2px);
}
#drop-zone p {
    pointer-events: none;
    text-shadow: 1px 1px 3px #000;
}
#drop-zone.hidden {
    opacity: 0;
    pointer-events: none;
}
body.drag-over #drop-zone {
    background-color: rgba(255, 186, 107, 0.1);
    border-color: var(--phosphor-amber);
}

#controls-container {
    /* CHANGED: Remove fixed width */
    display: flex;
    flex-direction: column;
    gap: 2rem; /* Add gap for spacing between title/grid/buttons */
}

/* NEW: Grid layout for the control sections */
#controls-grid {
    display: grid;
    /* This creates responsive columns. They will wrap on smaller screens. */
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem 1.5rem; /* Row and column gap */
}

.title { 
    color: var(--phosphor-amber); 
    text-align: center; 
    margin-top: 0; 
    margin-bottom: 0; 
    text-shadow: 0 0 8px var(--phosphor-amber-glow);
}
.subtitle { 
    text-align: center; 
    font-size: 0.8rem; 
    color: #8c8577; 
    margin: 0;
}
h3 { 
    border-bottom: 1px solid var(--silt-medium); 
    padding-bottom: 0.5rem; 
    margin-bottom: 1rem; 
    color: var(--silt-text);
    margin-top: 0;
}
.control-group { margin-bottom: 1rem; }
.slider-group { display: grid; grid-template-columns: 1fr 50px; grid-template-rows: auto auto; margin-bottom: 1rem; align-items: center; }
.slider-group label { grid-column: 1 / 2; margin-bottom: 0.5rem; }
.slider-group input[type="range"] { grid-column: 1 / 3; width: 100%; margin: 0; }
.slider-group input[type="number"] { grid-column: 2 / 3; grid-row: 1 / 2; width: 50px; background-color: var(--silt-darkest); color: var(--silt-text); border: 1px solid var(--silt-medium); border-radius: 4px; text-align: center; font-family: 'Fira Code', monospace; padding: 2px; }

input[type="range"] { 
    -webkit-appearance: none; 
    height: 4px; 
    background: var(--silt-darkest); 
    border-radius: 2px; 
    cursor: pointer; 
}
input[type="range"]::-webkit-slider-thumb { 
    -webkit-appearance: none; 
    appearance: none; 
    width: 16px; 
    height: 16px; 
    background: var(--phosphor-amber); 
    border-radius: 50%; 
    border: 2px solid var(--silt-dark);
    box-shadow: 0 0 10px var(--phosphor-amber-heavy-glow);
}

.button-group {
    display: flex;
    gap: 10px;
}
.button-group button, #upload-btn-placeholder {
    flex-grow: 1;
    padding: 12px;
    background-color: var(--phosphor-amber);
    color: #1e1c19;
    border: none;
    border-radius: 6px;
    font-family: 'Fira Code', monospace;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    text-shadow: none;
}
.button-group button:hover, #upload-btn-placeholder:hover {
    background-color: #ffca8a;
    box-shadow: 0 0 12px var(--phosphor-amber-heavy-glow);
}
#upload-btn-placeholder {
    background-color: var(--silt-medium);
    color: var(--silt-text);
}
#upload-btn-placeholder:hover {
    background-color: #686157;
    box-shadow: none;
}