/* === YashK Pro Theme Variables === */
:root {
    --yk-bg-main: #121212;
    --yk-bg-panel: #1E1E1E;
    --yk-bg-hover: #2C2C2C;
    --yk-accent: #FFD700; /* Gold */
    --yk-accent-hover: #E6C200;
    --yk-text-primary: #FFFFFF;
    --yk-text-secondary: #A0A0A0;
    --yk-border-radius: 12px;
    --yk-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Main Wrapper */
#yashk-app-wrapper {
    font-family: var(--yk-font);
    background: var(--yk-bg-main);
    color: var(--yk-text-primary);
    border-radius: var(--yk-border-radius);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    overflow: hidden;
    max-width: 900px;
    margin: 40px auto;
    border: 1px solid #333;
    line-height: 1.5;
}

/* === Upload Box === */
.yk-upload-box {
    padding: 80px 20px;
    text-align: center;
    border: 2px dashed #333;
    margin: 20px;
    border-radius: var(--yk-border-radius);
    transition: 0.3s ease;
}
.yk-upload-box:hover {
    border-color: var(--yk-accent);
    background: rgba(255, 215, 0, 0.05);
}
.yk-icon { font-size: 4em; margin-bottom: 20px; display: block; }
.yk-upload-box h3 { font-size: 1.8rem; font-weight: 700; margin: 0 0 15px 0; color: white; }

/* Subtext Styling */
.yk-subtext { margin-bottom: 30px; color: var(--yk-text-secondary); }
.yk-subtext p { margin: 5px 0; font-size: 1.1rem; }
.yk-subtext small { display: block; margin-top: 15px; font-size: 0.9rem; opacity: 0.7; color: #4BB543; /* Green for Trust */ }

/* === Studio Editor === */
.yk-studio-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    min-height: 550px;
}

/* Left Canvas */
.yk-canvas-container {
    background: #000;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.img-container img { max-width: 100%; display: block; }

/* Right Controls */
.yk-controls-panel {
    background: var(--yk-bg-panel);
    padding: 25px;
    border-left: 1px solid #333;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* Components */
.panel-header { display: flex; justify-content: space-between; align-items: center; }
.panel-header h4 { margin: 0; font-weight: 600; letter-spacing: 0.5px; font-size: 1.1rem; }
.group-label { display: block; font-weight: 600; margin-bottom: 12px; font-size: 0.85rem; color: var(--yk-text-secondary); text-transform: uppercase; letter-spacing: 1px; }
.helper-text { font-size: 0.85rem; color: var(--yk-text-secondary); margin-bottom: 10px; margin-top: -5px; }

/* Toggle Buttons */
.yk-toggle-buttons { display: flex; gap: 10px; }
.yk-toggle-btn {
    flex: 1;
    background: var(--yk-bg-main);
    border: 1px solid #333;
    color: var(--yk-text-secondary);
    padding: 12px 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.2s;
    text-align: left;
    display: flex;
    flex-direction: column;
}
.yk-toggle-btn .icon { font-size: 1.2rem; margin-bottom: 5px; display: block; }
.yk-toggle-btn small { font-size: 0.75rem; opacity: 0.7; margin-top: 2px; }
.yk-toggle-btn.active {
    background: rgba(255, 215, 0, 0.1);
    border-color: var(--yk-accent);
    color: var(--yk-accent);
}

/* Slider & Estimator */
.highlight-group { background: var(--yk-bg-main); padding: 20px; border-radius: 8px; border: 1px solid #252525; }
input[type=range] { width: 100%; cursor: pointer; accent-color: var(--yk-accent); margin: 10px 0; }
.slider-labels { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--yk-text-secondary); }
.size-estimator { margin-top: 15px; font-weight: 600; display: flex; align-items: center; justify-content: space-between; font-size: 0.95rem; }
.yk-badge { background: var(--yk-accent); color: #000; padding: 4px 12px; border-radius: 20px; font-size: 0.9rem; font-weight: 700; }

/* Buttons */
.yk-btn { border: none; padding: 14px 24px; border-radius: 8px; font-weight: 600; cursor: pointer; transition: 0.2s; font-family: var(--yk-font); display: inline-flex; align-items: center; justify-content: center; gap: 10px; font-size: 1rem; }
.yk-btn.primary { background: var(--yk-accent); color: #000; width: 100%; margin-top: auto; }
.yk-btn.primary:hover { background: var(--yk-accent-hover); box-shadow: 0 5px 15px rgba(255, 215, 0, 0.2); transform: translateY(-1px); }
.yk-btn.secondary { background: var(--yk-bg-hover); color: #FFF; border: 1px solid #444; padding: 12px 30px; font-size: 1.1rem; }
.yk-btn.secondary:hover { background: #3F3F3F; border-color: #666; }
.yk-text-btn { background: transparent; border: none; color: var(--yk-text-secondary); cursor: pointer; text-decoration: underline; font-size: 0.9rem; }

/* Spinner */
.yk-loading-overlay { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.85); z-index: 10; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--yk-accent); font-weight: 600; }
.spinner { border: 4px solid rgba(255, 255, 255, 0.1); width: 40px; height: 40px; border-radius: 50%; border-left-color: var(--yk-accent); animation: spin 1s linear infinite; margin-bottom: 15px; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* Mobile Responsive */
@media (max-width: 768px) {
    .yk-studio-layout { grid-template-columns: 1fr; }
    .yk-canvas-container { min-height: 350px; }
    .yk-upload-box { padding: 40px 15px; }
}