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

:root {
    --lavender: #b8a9c9;
    --pink: #f4c2c2;
    --mint: #b5ead7;
    --cream: #fef6e4;
    --soft-purple: #e0d4ed;
    --deep-purple: #6b5b7a;
    --shadow: rgba(107, 91, 122, 0.2);
}

body {
    font-family: 'Nunito', sans-serif;
    background: linear-gradient(135deg, var(--cream) 0%, var(--soft-purple) 50%, var(--pink) 100%);
    min-height: 100vh;
    color: var(--deep-purple);
    overflow-x: hidden;
}

header {
    background: linear-gradient(135deg, var(--pink) 0%, var(--lavender) 100%);
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 4px 20px var(--shadow);
}

header h1 {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    font-weight: 800;
    color: white;
    text-shadow: 2px 2px 10px rgba(107, 91, 122, 0.3);
    letter-spacing: 0.05em;
}

header .tagline {
    color: rgba(255, 255, 255, 0.9);
    margin-top: 0.5rem;
    font-weight: 600;
}

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.upload-zone {
    background: white;
    border: 3px dashed var(--lavender);
    border-radius: 24px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: pulse 3s ease-in-out infinite;
    box-shadow: 0 8px 32px var(--shadow);
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--pink);
    transform: scale(1.02);
    box-shadow: 0 12px 40px var(--shadow);
}

.upload-zone.minimized {
    padding: 1rem;
    animation: none;
}

.upload-zone.minimized .upload-icon {
    font-size: 2rem;
}

.upload-zone.minimized .upload-text,
.upload-zone.minimized .upload-subtext {
    display: none;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 8px 32px var(--shadow); }
    50% { box-shadow: 0 8px 48px var(--shadow), 0 0 20px rgba(244, 194, 194, 0.3); }
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: float 3s ease-in-out infinite;
}

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

.upload-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--deep-purple);
}

.upload-subtext {
    color: var(--lavender);
    margin-top: 0.5rem;
    font-weight: 600;
}

.preview-section {
    margin-top: 2rem;
}

.preview-section.hidden {
    display: none;
}

.canvas-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    background: white;
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 8px 32px var(--shadow);
}

@media (min-width: 768px) {
    .canvas-container {
        flex-direction: row;
        justify-content: center;
    }
}

.canvas-wrapper {
    position: relative;
    transition: opacity 0.3s ease;
}

.canvas-label {
    position: absolute;
    top: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--pink), var(--lavender));
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.85rem;
    z-index: 10;
    white-space: nowrap;
}

canvas {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 16px var(--shadow);
}

.slider-container {
    width: 100%;
    padding: 0 1rem;
}

@media (min-width: 768px) {
    .slider-container {
        width: auto;
        transform: rotate(90deg);
    }
}

.compare-slider {
    width: 100%;
    accent-color: var(--lavender);
}

.controls-panel {
    background: white;
    border-radius: 20px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    box-shadow: 0 8px 32px var(--shadow);
}

.control-group {
    margin-bottom: 1.25rem;
}

.control-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.control-icon {
    font-size: 1.25rem;
}

.slider-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.slider-wrapper input[type="range"] {
    flex: 1;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: linear-gradient(to right, var(--mint), var(--lavender));
    border-radius: 4px;
    outline: none;
}

.slider-wrapper input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--pink), var(--lavender));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform 0.2s;
}

.slider-wrapper input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.slider-label {
    font-size: 0.75rem;
    color: var(--lavender);
    font-weight: 600;
    min-width: 60px;
}

.slider-label:last-child {
    text-align: right;
}

.toggle-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.toggle-btn {
    padding: 0.5rem 1.5rem;
    border: 2px solid var(--lavender);
    background: white;
    border-radius: 20px;
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    color: var(--lavender);
    cursor: pointer;
    transition: all 0.3s;
}

.toggle-btn.active {
    background: linear-gradient(135deg, var(--mint), var(--lavender));
    color: white;
    border-color: transparent;
}

.magic-btn {
    width: 100%;
    padding: 1rem 2rem;
    margin-top: 1rem;
    font-size: 1.25rem;
    font-weight: 800;
    font-family: 'Nunito', sans-serif;
    color: white;
    background: linear-gradient(135deg, var(--pink) 0%, var(--lavender) 50%, var(--mint) 100%);
    background-size: 200% 200%;
    border: none;
    border-radius: 16px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 20px var(--shadow);
}

.magic-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px var(--shadow);
    animation: gradient-shift 2s ease infinite;
}

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

.sparkles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: white;
    border-radius: 50%;
    opacity: 0;
    left: calc(var(--x) * 100%);
    top: calc(var(--y) * 100%);
}

.magic-btn:hover .particle {
    animation: sparkle 1.5s ease-in-out infinite;
    animation-delay: var(--delay);
}

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

.progress-container {
    margin-top: 1.5rem;
    text-align: center;
}

.progress-container.hidden {
    display: none;
}

.progress-bar {
    width: 100%;
    height: 16px;
    background: var(--cream);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: inset 0 2px 8px var(--shadow);
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--mint), var(--lavender), var(--pink));
    background-size: 200% 100%;
    border-radius: 10px;
    transition: width 0.3s ease;
    animation: shimmer 2s linear infinite;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.progress-text {
    margin-top: 0.75rem;
    font-weight: 700;
    color: var(--deep-purple);
    animation: bounce 1s ease infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.results-section {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.results-section.hidden {
    display: none;
}

.action-btn {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 700;
    font-family: 'Nunito', sans-serif;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 16px var(--shadow);
}

.download-btn {
    background: linear-gradient(135deg, var(--mint), var(--lavender));
    color: white;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px var(--shadow);
}

.reset-btn {
    background: white;
    color: var(--deep-purple);
    border: 2px solid var(--lavender);
}

.reset-btn:hover {
    background: var(--cream);
    transform: translateY(-2px);
}

.tips-panel {
    margin-top: 2rem;
}

.tips-toggle {
    width: 100%;
    padding: 1rem;
    background: white;
    border: none;
    border-radius: 12px;
    font-family: 'Nunito', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--deep-purple);
    cursor: pointer;
    box-shadow: 0 4px 16px var(--shadow);
    transition: all 0.3s;
}

.tips-toggle:hover {
    background: var(--cream);
}

.tips-content {
    background: white;
    border-radius: 0 0 12px 12px;
    padding: 1rem 1.5rem;
    margin-top: -4px;
    box-shadow: 0 4px 16px var(--shadow);
}

.tips-content.hidden {
    display: none;
}

.tips-content ul {
    list-style: none;
}

.tips-content li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--deep-purple);
}

.tips-content li::before {
    content: '✨';
    position: absolute;
    left: 0;
}

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--deep-purple);
}

footer p {
    margin-bottom: 0.5rem;
    font-weight: 600;
}

footer a {
    color: var(--lavender);
    text-decoration: none;
    font-weight: 700;
    transition: color 0.3s;
}

footer a:hover {
    color: var(--pink);
}

.hidden {
    display: none !important;
}