:root {
    --primary-green: #2ecc71;
    --primary-green-dark: #27ae60;
    --secondary-blue: #3498db;
    --secondary-blue-dark: #2980b9;
    --red-alert: #e74c3c;
    --red-alert-dark: #c0392b;

    --card-background: #639c5e;
    --border-color-light: #e0e0e0;
    --border-color-gray: #ccc; /* This variable is still here but will no longer be used for borders */
    --khaki-border: #C3B091; /* NEW: Khaki color */

    --text-color-dark: #343a40;
    --text-color-medium: #6c757d;
    --text-color-light: #adb5bd;

    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 5px 15px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-color-dark);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    margin: 0;
    padding: 30px;
    box-sizing: border-box;
    gap: 30px;

    background-image: url('assets/background.png');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.container {
    background: none !important;
    border: none !important;
    box-shadow: none !important;
    border-radius: 0 !important;
    padding: 0 !important;

    max-width: 1000px;
    width: 100%;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

h1 {
    font-family: 'Montserrat', sans-serif;
    color: var(--primary-green);
    margin-bottom: 0;
    font-size: 2.8em;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.8), 0 0 10px rgba(255, 255, 255, 0.6);
}

.main-content {
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
    justify-content: center;
    background-color: transparent;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
}

.controls {
    flex: 1;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.control-group {
    background-color: var(--card-background);
    border-radius: 8px;
    padding: 20px;
    box-shadow: var(--shadow-light);
    text-align: left;
    border: 1px solid var(--khaki-border); /* CHANGED TO KHAKI */
}

.control-group h3 {
    color: var(--text-color-dark);
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1.2em;
    border-bottom: 1px solid var(--khaki-border); /* CHANGED TO KHAKI */
    padding-bottom: 10px;
}

input[type="file"] {
    display: block;
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: 5px;
    background-color: #ffffff00;
    cursor: pointer;
    font-size: 0.9em;
    color: var(--text-color-medium);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}
input[type="file"]::file-selector-button {
    background-color: var(--primary-green);
    color: rgb(255, 255, 255);
    border: none;
    padding: 8px 12px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-right: 10px;
}
input[type="file"]::file-selector-button:hover {
    background-color: var(--primary-green-dark);
}


.element-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-start;
}

button {
    background-color: var(--primary-green);
    color: white;
    border: none;
    border-radius: 5px;
    padding: 12px 20px;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    flex-grow: 1;
    min-width: unset;
    max-width: calc(50% - 5px);
}

button:hover {
    background-color: var(--primary-green-dark);
    transform: translateY(-1px);
}

button:active {
    background-color: var(--primary-green-dark);
    transform: translateY(0);
}

button:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

button#downloadBtn {
    background-color: var(--secondary-blue);
}
button#downloadBtn:hover {
    background-color: var(--secondary-blue-dark);
}


.checkbox-container {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    margin-bottom: 15px;
    font-size: 1em;
    color: var(--text-color-dark);
    cursor: pointer;
}

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-green);
    cursor: pointer;
}

.canvas-container {
    position: relative;
    flex: 2;
    max-width: 65%;
    height: 100%;
    background-color: var(--card-background);
    border: 1px solid var(--khaki-border); /* CHANGED TO KHAKI */
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    min-height: 400px;
    padding: 20px;
}

#imageCanvas {
    display: block;
    max-width: 100%;
    height: auto;
    cursor: grab;
    touch-action: none;
}

#canvasPlaceholder {
    position: absolute;
    top: 20px;
    left: 20px;
    width: calc(100% - 40px);
    height: calc(100% - 40px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-color-medium);
    font-size: 1.2em;
    background-color: var(--card-background);
    border-radius: 8px;
    min-height: 250px;
}
#canvasPlaceholder::before {
    content: '💉';
    font-size: 3em;
    margin-bottom: 15px;
    color: var(--primary-green);
}

#imageCanvas:not([width="0"]):not([height="0"]) + #canvasPlaceholder {
    display: none;
}

/* Media Queries for Responsiveness */
@media (max-width: 850px) {
    .main-content {
        flex-direction: column;
        padding: 0;
    }
    .controls {
        min-width: unset;
        width: 100%;
    }
    .canvas-container {
        max-width: 100%;
        padding: 15px;
    }
    #canvasPlaceholder {
        top: 15px;
        left: 15px;
        width: calc(100% - 30px);
        height: calc(100% - 30px);
    }
}

@media (max-width: 550px) {
    body {
        padding: 15px;
        gap: 20px;
    }
    h1 {
        font-size: 2em;
    }
    .control-group {
        padding: 15px;
    }
    button {
        padding: 10px 15px;
        max-width: 100%;
    }
    .element-buttons {
        justify-content: center;
    }
}