body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #0c0c0c 0%, #1a1a2e 50%, #16213e 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden;
}

:root {
    --sidebar-width: 380px;
    --sidebar-gap: 46px;
}

#container {
    position: relative;
    width: 100vw;
    height: 100vh;
}

#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

#canvas-container canvas {
    pointer-events: auto;
}

.sidebar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: var(--sidebar-width);
    max-width: calc(100vw - 30px);
    padding: 15px;
    box-sizing: border-box;
    transform: translateX(0);
    transition: transform 280ms ease;
    z-index: 10;
}

.sidebar.collapsed {
    transform: translateX(-100%);
}

#controls {
    position: absolute;
    top: 15px;
    left: 15px;
    right: 15px;
    background: rgba(0, 0, 0, 0.85);
    padding: 25px;
    padding-bottom: 35px;
    border-radius: 12px;
    color: white;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 350px;
    max-width: 100%;
    max-height: calc(100vh - 30px);
    overflow-y: auto;
    overflow-x: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

#sidebarToggle {
    position: fixed;
    top: 15px;
    left: var(--sidebar-gap);
    z-index: 100;
    width: 44px;
    height: 44px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 12px;
    border: 1px solid #2bbf5a;
    background: rgba(15, 25, 20, 0.9);
    color: #eaffef;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0,0,0,0.4);
    transition: left 280ms ease, transform .2s ease, box-shadow .2s ease, background .2s ease;
}

#sidebarToggle:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(43,191,90,0.25);
}

/* When sidebar is open, move toggle to sit at its outer edge. Cap left so the
   button never leaves the viewport (otherwise on narrow widths / near-full-width
   sidebar the user cannot see the control to retract the panel). */
body:not(.sidebar-collapsed) #sidebarToggle {
    left: min(
        calc(var(--sidebar-width) + var(--sidebar-gap)),
        calc(100vw - 44px - 8px)
    );
}

@media (max-width: 420px) {
    :root { --sidebar-width: calc(100vw - 40px); }
}

/* Custom scrollbar for the controls panel */
#controls::-webkit-scrollbar {
    width: 8px;
}

#controls::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

#controls::-webkit-scrollbar-thumb {
    background: rgba(76, 175, 80, 0.6);
    border-radius: 4px;
}

#controls::-webkit-scrollbar-thumb:hover {
    background: rgba(76, 175, 80, 0.8);
}

/* Firefox scrollbar */
#controls {
    scrollbar-width: thin;
    scrollbar-color: rgba(76, 175, 80, 0.6) rgba(255, 255, 255, 0.1);
}

.control-group {
    margin-bottom: 18px;
}

.control-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 16px;
    color: #ccc;
    line-height: 1.4;
    font-weight: 500;
}

select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #444;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 16px;
    box-sizing: border-box;
    font-weight: 500;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
    transition: all 0.3s ease;
}

/* Custom dropdown styling */
.custom-dropdown {
    position: relative;
    width: 100%;
}

.dropdown-selected {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #444;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 16px;
    box-sizing: border-box;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

.dropdown-selected:hover {
    border-color: #4CAF50;
    background-color: rgba(255, 255, 255, 0.15);
}

.dropdown-selected.active {
    border-color: #4CAF50;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='18,15 12,9 6,15'%3e%3c/polyline%3e%3c/svg%3e");
}

.dropdown-options {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(26, 26, 26, 0.95);
    border: 2px solid #4CAF50;
    border-top: none;
    border-radius: 0 0 8px 8px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    backdrop-filter: blur(10px);
}

.dropdown-options.show {
    display: block;
}

/* Prevent background scroll when dropdown is open */
body.dropdown-open {
    overflow: hidden;
}

.dropdown-option {
    padding: 12px 15px;
    color: white;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.dropdown-option:last-child {
    border-bottom: none;
}

.dropdown-option:hover {
    background: #4CAF50;
    color: white;
    font-weight: 600;
}

.dropdown-option.selected {
    background: #4CAF50;
    color: white;
    font-weight: 700;
}

/* Custom scrollbar for dropdown options */
.dropdown-options::-webkit-scrollbar {
    width: 6px;
}

.dropdown-options::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.dropdown-options::-webkit-scrollbar-thumb {
    background: rgba(76, 175, 80, 0.6);
    border-radius: 3px;
}

.dropdown-options::-webkit-scrollbar-thumb:hover {
    background: rgba(76, 175, 80, 0.8);
}

/* Firefox scrollbar for dropdown options */
.dropdown-options {
    scrollbar-width: thin;
    scrollbar-color: rgba(76, 175, 80, 0.6) rgba(255, 255, 255, 0.1);
}

select:hover {
    border-color: #4CAF50;
    background-color: rgba(255, 255, 255, 0.15);
}

select:focus {
    outline: none;
    border-color: #4CAF50;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

select option {
    background: #1a1a1a !important;
    color: #ffffff !important;
    padding: 12px 15px !important;
    font-size: 16px !important;
    font-weight: 500 !important;
    border: none !important;
    margin: 2px 0 !important;
    border-radius: 4px !important;
    line-height: 1.4 !important;
}

select option:hover {
    background: #4CAF50 !important;
    color: white !important;
    font-weight: 600 !important;
}

select option:checked,
select option:selected {
    background: #4CAF50 !important;
    color: white !important;
    font-weight: 700 !important;
}

select option:focus {
    background: #4CAF50 !important;
    color: white !important;
    outline: none !important;
}

/* Styling for different browsers */
select option::-moz-focus-inner {
    border: 0 !important;
}

/* Webkit specific styling */
select option::-webkit-option {
    background: #1a1a1a !important;
    color: white !important;
    padding: 12px 15px !important;
}

select option::-webkit-option:hover {
    background: #4CAF50 !important;
    color: white !important;
}

/* Additional styling for better appearance */
select option:first-child {
    border-top-left-radius: 4px !important;
    border-top-right-radius: 4px !important;
}

select option:last-child {
    border-bottom-left-radius: 4px !important;
    border-bottom-right-radius: 4px !important;
}

/* Styling for disabled options */
select option:disabled {
    background: #333 !important;
    color: #666 !important;
    font-style: italic !important;
}

/* Better spacing between options */
select option:not(:last-child) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
}

input[type="range"] {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid #444;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.08);
    color: white;
    font-size: 16px;
    box-sizing: border-box;
    font-weight: 500;
    -webkit-appearance: none;
    appearance: none;
    height: 24px; /* clickable area */
    outline: none;
    transition: all 0.2s ease;
}

input[type="range"]:hover {
    border-color: #4CAF50;
    background-color: rgba(255, 255, 255, 0.15);
}

input[type="range"]:focus {
    outline: none;
    border-color: #4CAF50;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

/* WebKit */
input[type="range"]::-webkit-slider-runnable-track {
    height: 6px;
    background: linear-gradient(90deg, rgba(43,191,90,0.4), rgba(43,191,90,0.15));
    border-radius: 999px;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: #2bbf5a;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #0b2213;
    margin-top: -6px; /* centers thumb over 6px track */
    box-shadow: 0 0 0 3px rgba(11,34,19,1);
    transition: transform .15s ease, box-shadow .15s ease;
}
input[type="range"]:hover::-webkit-slider-thumb,
input[type="range"]:focus::-webkit-slider-thumb {
    box-shadow: 0 0 0 4px rgba(43,191,90,0.25);
    transform: scale(1.05);
}

/* Firefox */
input[type="range"]::-moz-range-track {
    height: 6px;
    background: linear-gradient(90deg, rgba(43,191,90,0.4), rgba(43,191,90,0.15));
    border-radius: 999px;
}
input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: #2bbf5a;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #0b2213;
    box-shadow: 0 0 0 3px rgba(11,34,19,1);
}

button:not(.close-btn) {
    background: #1f8a3b;
    color: #eaffef;
    border: 1px solid #2bbf5a;
    padding: 12px 18px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 16px;
    margin: 8px 0;
    margin-bottom: 15px;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    width: 100%;
    box-sizing: border-box;
    font-weight: 600;
}

button:not(.close-btn):hover {
    transform: translateY(-1px);
    box-shadow: 0 0 0 3px rgba(43,191,90,0.15) inset, 0 0 16px rgba(43,191,90,0.25);
}

/* Specific styling for the last button */
#reset-view {
    margin-bottom: 30px !important;
}

#info {
    position: absolute !important;
    bottom: 20px !important;
    right: 20px !important;
    top: auto !important;
    left: auto !important;
    background: rgba(0, 0, 0, 0.85);
    padding: 20px;
    border-radius: 12px;
    color: white;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
    max-width: 350px;
    z-index: 100 !important;
    display: block !important;
    pointer-events: auto !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    line-height: 1.5;
}

.close-btn {
    position: absolute !important;
    top: 5px !important;
    right: 5px !important;
    background: none;
    color: white !important;
    /* border: 3px solid yellow !important; */
    width: 40px !important;
    height: 40px !important;
    border-radius: 50% !important;
    cursor: pointer !important;
    font-size: 24px !important;
    font-weight: bold !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    transition: all 0.3s ease;
    margin: 0 !important;
    padding: 0 !important;
    z-index: 1000 !important;
    pointer-events: auto !important;
    /* box-shadow: 0 0 10px rgba(255, 255, 0, 0.8) !important; */
}

.close-btn:hover {
    /* background: rgba(255, 0, 0, 0.9); */
    transform: scale(1.1);
}

.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 18px;
}

#info.hidden {
    display: none !important;
}

/* Header styling */
#controls h3 {
    margin: 0 0 20px 0 !important;
    font-size: 20px !important;
    color: #4CAF50 !important;
    text-align: center;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(76, 175, 80, 0.3);
    font-weight: 700;
    letter-spacing: 1px;
}

/* Responsive design for smaller screens */
@media (max-width: 768px) {
    #controls {
        width: calc(100vw - 30px);
        max-width: 400px;
        padding: 20px;
        padding-bottom: 30px;
        top: 10px;
        left: 10px;
    }
    
    .control-group {
        margin-bottom: 15px;
    }
    
    .control-group label {
        font-size: 15px;
        margin-bottom: 6px;
    }
    
    select {
        padding: 10px 12px;
        padding-right: 35px;
        font-size: 15px;
        background-size: 14px;
    }
    
    input[type="range"] {
        padding: 10px 12px;
        font-size: 15px;
    }
    
    select option {
        font-size: 15px !important;
        padding: 10px 12px !important;
        margin: 1px 0 !important;
    }
    
    button:not(.close-btn) {
        padding: 12px 20px;
        font-size: 15px;
        margin: 6px 0;
        margin-bottom: 12px;
    }
    
    #controls h3 {
        font-size: 18px !important;
        margin-bottom: 18px !important;
    }
    
    #info {
        bottom: 15px !important;
        right: 15px !important;
        max-width: calc(100vw - 30px);
        padding: 15px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    #controls {
        width: calc(100vw - 20px);
        padding: 15px;
        padding-bottom: 25px;
        top: 10px;
        left: 10px;
    }
    
    .control-group {
        margin-bottom: 12px;
    }
    
    .control-group label {
        font-size: 14px;
        margin-bottom: 5px;
    }
    
    select {
        padding: 8px 10px;
        padding-right: 30px;
        font-size: 14px;
        background-size: 12px;
    }
    
    input[type="range"] {
        padding: 8px 10px;
        font-size: 14px;
    }
    
    select option {
        font-size: 14px !important;
        padding: 8px 10px !important;
        margin: 1px 0 !important;
    }
    
    button:not(.close-btn) {
        padding: 10px 15px;
        font-size: 14px;
        margin: 5px 0;
        margin-bottom: 10px;
    }
    
    #controls h3 {
        font-size: 16px !important;
        margin-bottom: 15px !important;
    }
    
    #info {
        bottom: 10px !important;
        right: 10px !important;
        max-width: calc(100vw - 20px);
        padding: 12px;
        font-size: 12px;
    }
}