:root {
    /* Color Palette */
    --bg-color: #0f172a;
    --panel-bg: rgba(30, 41, 59, 0.7);
    --panel-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    
    /* Variables */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --shadow-sm: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.5);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    overflow: hidden; 
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
}

.app-container {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Workspace Area */
.workspace {
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Interactive Crop Container */
.crop-container {
    position: relative;
    border: 2px dashed rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5), var(--shadow-2xl);
    border-radius: 8px;
    background: #000;
    will-change: width, height;
}

.crop-container:hover {
    border-color: var(--accent-color);
}

canvas {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: fill; 
    image-rendering: auto;
    border-radius: 6px;
}

/* Drag Handles */
.handle {
    position: absolute;
    background: var(--accent-color);
    border: 2px solid white;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    z-index: 30;
    box-shadow: var(--shadow-sm);
}

.handle.nw { top: -8px; left: -8px; cursor: nwse-resize; }
.handle.ne { top: -8px; right: -8px; cursor: nesw-resize; }
.handle.sw { bottom: -8px; left: -8px; cursor: nesw-resize; }
.handle.se { bottom: -8px; right: -8px; cursor: nwse-resize; }

.handle.n { top: -8px; left: 50%; transform: translateX(-50%); cursor: ns-resize; }
.handle.s { bottom: -8px; left: 50%; transform: translateX(-50%); cursor: ns-resize; }
.handle.w { top: 50%; left: -8px; transform: translateY(-50%); cursor: ew-resize; }
.handle.e { top: 50%; right: -8px; transform: translateY(-50%); cursor: ew-resize; }

.handle:hover {
    transform: scale(1.3) translateX(calc(var(--tw-translate-x, 0) * -0.2)) translateY(calc(var(--tw-translate-y, 0) * -0.2));
    /* The above pseudo-hack prevents transform overrides from completely breaking position offsets. A better approach to center is margin */
}

/* Fix Handle Center Offsets to be robust */
.handle.n, .handle.s { margin-left: 0; }
.handle.w, .handle.e { margin-top: 0; }

/* Loading State */
.loader {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 20px 30px;
    border-radius: var(--border-radius);
    border: 1px solid var(--panel-border);
    z-index: 10;
    transition: opacity 0.3s ease;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255,255,255,0.1);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Floating Controls Panel */
.controls-panel {
    position: absolute;
    top: 30px;
    left: 30px;
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid var(--panel-border);
    box-shadow: var(--shadow-lg);
    z-index: 20;
    color: var(--text-primary);
    width: 250px;
    transition: all 0.3s ease;
}

.app-logo {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text; 
}

.panel-divider {
    height: 1px;
    background: var(--panel-border);
    margin-bottom: 20px;
}

.panel-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

/* Beautiful Custom Toggles */
.toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
    position: relative;
    user-select: none;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.slider {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 34px;
    transition: .3s;
    margin-right: 12px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.toggle input:checked + .slider {
    background-color: var(--accent-color);
}

.toggle input:checked + .slider:before {
    transform: translateX(20px);
}

.label-text {
    flex-grow: 1;
}

/* Tooltip */
.resize-tooltip {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--panel-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 10px 20px;
    border-radius: 30px;
    border: 1px solid var(--panel-border);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    box-shadow: var(--shadow-md);
    transition: opacity 0.5s ease, transform 0.5s ease;
    z-index: 5;
    pointer-events: none;
    animation: bounce 2s infinite ease-in-out;
}

@keyframes bounce {
    0%, 100% { transform: translate(-50%, 0); }
    50% { transform: translate(-50%, -10px); }
}

.resize-tooltip.hidden {
    opacity: 0;
    transform: translate(-50%, 20px);
}

.hidden-input {
    display: none;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.action-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.action-btn:active {
    transform: translateY(0);
}

/* Right Side Library Panel */
.library-panel {
    position: absolute;
    top: 30px;
    right: 30px;
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid var(--panel-border);
    box-shadow: var(--shadow-lg);
    z-index: 20;
    color: var(--text-primary);
    width: 260px;
    transition: all 0.3s ease;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.panel-header .app-logo, .panel-header .panel-title {
    margin-bottom: 0;
}

.collapse-icon {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.collapsed .collapse-icon {
    transform: rotate(180deg);
}

.panel-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 16px;
}

.collapsed .panel-body {
    display: none;
}

.sample-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.sample-image {
    width: 100%;
    height: 70px;
    object-fit: cover;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.sample-image:hover {
    transform: scale(1.05);
    border-color: rgba(255, 255, 255, 0.4);
}

.upload-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 24px;
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.upload-area:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-color);
    color: white;
}

/* Mobile Responsiveness */
@media (max-width: 800px) {
    .controls-panel {
        top: 10px;
        left: 10px;
        right: 10px;
        width: auto;
    }
    
    .library-panel {
        top: auto;
        bottom: 10px;
        left: 10px;
        right: 10px;
        width: auto;
    }
    
    .panel-body {
        max-height: 40vh;
        overflow-y: auto;
    }
}

/* Overlay & Glassmorphism */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 50;
    opacity: 1;
    transition: opacity 0.5s ease;
}

.overlay.hidden {
    opacity: 0;
    pointer-events: none; /* Allows clicking through */
}

.glass-panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 24px;
    padding: 40px;
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    text-align: center;
    transform: translateY(0);
    transition: transform 0.5s ease;
}

.overlay.hidden .glass-panel {
    transform: translateY(20px);
}

.glass-panel h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.glass-panel p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.features {
    list-style: none;
    text-align: left;
    margin-bottom: 30px;
    padding: 0 10px;
}

.features li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.primary-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 12px 32px;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.39);
}

.primary-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
} .hidden { display: none !important; }