/* SimpleFaceApp - Modern Styles */

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

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #10ac84;
    --danger-color: #ee5a52;
    --white: #ffffff;
    --dark-color: #2f3542;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
    --border-radius: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
    color: var(--dark-color);
    position: relative;
    overflow-x: hidden;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

/* Background effects */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.2) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

h1 {
    text-align: center;
    color: var(--white);
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 4px 20px rgba(255, 255, 255, 0.3);
    background: linear-gradient(45deg, var(--white), var(--accent-color));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s ease infinite;
}

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

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
}

.image-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}

.image-box {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.3);
    width: 400px;
    transition: var(--transition);
    animation: slideInUp 0.8s ease-out;
}

.image-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.image-box h3 {
    text-align: center;
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--dark-color);
    font-weight: 600;
    font-size: 1.2rem;
    padding-bottom: 10px;
    border-bottom: 2px solid rgba(102, 126, 234, 0.2);
}

canvas, #imageUpload {
    max-width: 100%;
    display: block;
    margin: 10px auto;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

canvas:hover, #imageUpload:hover {
    transform: scale(1.02);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
}

#uploadBtn, .filter-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 12px;
    cursor: pointer;
    margin: 5px;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

#uploadBtn::before, .filter-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

#uploadBtn:hover::before, .filter-btn:hover::before {
    left: 100%;
}

#uploadBtn:hover, .filter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

#uploadBtn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 18px 35px;
    font-size: 1.1rem;
    border-radius: 15px;
    margin-bottom: 15px;
}

.filter-container {
    margin: 20px 0;
    width: 100%;
    max-width: 800px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: slideInUp 0.8s ease-out 0.2s both;
}

.filter-category {
    margin-bottom: 15px;
    background: rgba(102, 126, 234, 0.05);
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.1);
    transition: var(--transition);
}

.category-title {
    margin-top: 0;
    color: var(--dark-color);
    border-bottom: 2px solid rgba(102, 126, 234, 0.2);
    padding-bottom: 10px;
    margin-bottom: 15px;
    font-weight: 700;
    font-size: 1.2rem;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-btn {
    background: var(--white);
    color: var(--dark-color);
    border: 2px solid #e0e6ed;
    padding: 10px 16px;
    font-size: 0.9rem;
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.hidden {
    display: none;
}

#loadingMessage {
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    margin: 10px 0;
    font-style: italic;
    font-size: 1rem;
}

.slider-container {
    margin: 15px 0 25px 0;
    background: rgba(102, 126, 234, 0.05);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--dark-color);
    font-size: 1rem;
}

.slider-container input {
    width: 100%;
}

#intensitySlider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(90deg, #e0e6ed, var(--primary-color));
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    transition: var(--transition);
    margin: 10px 0;
}

#intensitySlider::-webkit-slider-thumb {
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    transition: var(--transition);
}

#intensitySlider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

select {
    padding: 15px 20px;
    border-radius: 12px;
    border: 2px solid #e0e6ed;
    background: var(--white);
    width: 100%;
    margin-bottom: 20px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition);
}

select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    outline: none;
}

.save-btn {
    background: linear-gradient(135deg, var(--success-color), #1dd1a1);
    color: white;
    border: none;
    padding: 15px 25px;
    border-radius: 12px;
    cursor: pointer;
    margin: 15px 5px;
    font-size: 16px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.save-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(16, 172, 132, 0.3);
}

.active-filter {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    color: white !important;
    border-color: var(--primary-color) !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.control-buttons {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

#resetBtn {
    background: linear-gradient(135deg, var(--danger-color), #ff6b6b) !important;
    color: white !important;
    padding: 15px 25px;
    font-size: 16px;
    border-radius: 12px;
}

#resetBtn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(238, 90, 82, 0.3);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile Styles - Zdjęcia 140px szerokości obok siebie */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }

    h1 {
        font-size: 2.2rem;
    }

    .filter-container {
        padding: 20px;
    }

    .filter-buttons {
        gap: 8px;
    }

    .filter-btn {
        padding: 8px 12px;
        font-size: 0.85rem;
        margin: 2px;
    }

    .control-buttons {
        flex-direction: column;
        align-items: center;
    }

    .save-btn, #resetBtn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }

    /* Kluczowe: Zdjęcia obok siebie 140px szerokości */
    .image-container {
        gap: 10px;
        margin-top: 15px;
    }

    .image-box {
        width: 140px;
        padding: 10px;
        margin: 0;
    }

    .image-box h3 {
        font-size: 0.9rem;
        margin-bottom: 8px;
    }

    canvas, #imageUpload {
        margin: 5px auto;
        border-radius: 8px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.8rem;
    }

    .filter-container {
        padding: 15px;
    }

    .filter-btn {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    /* Na bardzo małych ekranach nadal obok siebie */
    .image-box {
        width: 135px;
        padding: 8px;
    }

    .image-box h3 {
        font-size: 0.8rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0066cc;
        --secondary-color: #004499;
        --dark-color: #000000;
    }
    
    .filter-btn {
        border-width: 3px;
    }
}