/* ========================================
   Background Remover - Glassmorphism Design
   ======================================== */

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #ec4899;
    --accent: #f59e0b;

    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-bg-hover: rgba(255, 255, 255, 0.12);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-border-strong: rgba(255, 255, 255, 0.25);

    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);

    --bg-dark: #0f0f1a;
    --bg-darker: #08080f;

    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);

    --radius: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
}

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

body {
    font-family: 'Cairo', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Background Effects */
.bg-effects {
    position: fixed;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: -1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--secondary);
    bottom: -150px;
    left: -150px;
    animation-delay: -5s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: var(--accent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -50px) scale(1.05); }
    50% { transform: translate(-30px, 30px) scale(0.95); }
    75% { transform: translate(-50px, -30px) scale(1.02); }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 5%;
    background: rgba(15, 15, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo i {
    font-size: 1.75rem;
    color: var(--primary);
    -webkit-text-fill-color: initial;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: var(--glass-bg);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 5% 80px;
    text-align: center;
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradient-shift 5s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

/* Upload Section */
.upload-section {
    margin-top: 3rem;
}

.upload-area {
    background: var(--glass-bg);
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 4rem 3rem;
    cursor: pointer;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.upload-area:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-strong);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.upload-area.drag-over {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary);
}

.upload-icon {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.upload-area h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-area p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-tool {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-strong);
}

.btn-tool {
    padding: 0.75rem 1.25rem;
    background: var(--glass-bg);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}

.btn-tool.active,
.btn-tool:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Loading State */
.loading-state {
    padding: 3rem;
    text-align: center;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--glass-border);
    border-top-color: var(--primary);
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    animation: spin 1s linear infinite;
}

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

/* Editor Section */
.editor-section {
    padding: 100px 5%;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-secondary);
}

.editor-container {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
}

/* Comparison Container */
.comparison-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.image-box {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
}

.image-label {
    position: absolute;
    top: -10px;
    right: 20px;
    background: var(--primary);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.image-wrapper {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-darker);
}

.image-wrapper img,
.image-wrapper canvas {
    max-width: 100%;
    max-height: 500px;
    object-fit: contain;
}

.checkerboard-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(45deg, #808080 25%, transparent 25%),
        linear-gradient(-45deg, #808080 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #808080 75%),
        linear-gradient(-45deg, transparent 75%, #808080 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    opacity: 0.3;
    z-index: -1;
}

/* Tools Panel */
.tools-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.tools-panel h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.tool-group {
    margin-bottom: 1.5rem;
}

.tool-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* Color Options */
.color-options {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.color-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.color-btn:hover {
    transform: scale(1.1);
}

.color-btn.active {
    border-color: white;
    box-shadow: 0 0 0 2px var(--primary);
}

.color-btn.transparent {
    background: linear-gradient(45deg, #808080 25%, transparent 25%);
    background-size: 10px 10px;
}

.color-picker {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    overflow: hidden;
}

.color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker::-webkit-color-swatch {
    border: none;
    border-radius: 50%;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
    margin-right: 10px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 26px;
    transition: 0.3s;
}

.slider:before {
    content: "";
    position: absolute;
    height: 20px;
    width: 20px;
    right: 2px;
    bottom: 2px;
    background: white;
    border-radius: 50%;
    transition: 0.3s;
}

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

.toggle-switch input:checked + .slider:before {
    transform: translateX(-24px);
}

/* Brush Controls */
.brush-controls {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius);
}

.brush-size {
    margin-bottom: 1rem;
}

.brush-size input[type="range"] {
    width: 100%;
    margin-top: 0.5rem;
}

.brush-actions {
    display: flex;
    gap: 10px;
}

/* Range Slider Styling */
input[type="range"] {
    -webkit-appearance: none;
    height: 6px;
    background: var(--glass-bg);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    transition: 0.3s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--primary);
}

/* Tool Actions */
.tool-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
}

.tool-actions button {
    width: 100%;
    justify-content: center;
}

/* API Section */
.api-section {
    padding: 100px 5%;
    background: rgba(0, 0, 0, 0.2);
}

.api-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.api-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all 0.4s ease;
}

.api-card:hover {
    transform: translateY(-5px);
    border-color: var(--glass-border-strong);
    box-shadow: var(--shadow);
}

.api-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2.5rem;
}

.api-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.api-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.api-input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 0.5rem;
}

.api-input-group input {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--bg-darker);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-family: inherit;
}

.api-input-group input::placeholder {
    color: var(--text-muted);
}

.api-card small {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Toast Notifications */
#toastContainer {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 1rem 2rem;
    color: var(--text-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: toastSlide 0.4s ease;
    box-shadow: var(--shadow);
}

.toast.success {
    border-color: #10b981;
    background: rgba(16, 185, 129, 0.1);
}

.toast.error {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

@keyframes toastSlide {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .editor-container {
        grid-template-columns: 1fr;
    }

    .tools-panel {
        position: static;
    }

    .comparison-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
    }

    .upload-area {
        padding: 2rem 1.5rem;
    }

    .image-box {
        padding: 1rem;
    }

    .image-wrapper {
        min-height: 250px;
    }
}