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

:root {
    --bg-gradient: radial-gradient(circle at 0% 0%, #00ff88 0%, transparent 50%),
                radial-gradient(circle at 100% 0%, #9933ff 0%, transparent 50%),
                radial-gradient(circle at 100% 100%, #00ff88 0%, transparent 50%),
                radial-gradient(circle at 0% 100%, #9933ff 0%, transparent 50%);
    --text-color: #333;
    --container-bg: rgba(255, 255, 255, 0.95);
    --primary-color: #4a6cff;
    --primary-hover: #3a5cee;
    --input-bg: #f8f9fc;
    --input-border: #e1e5ee;
    --item-bg: #f8f9fc;
    --conclusion-bg: #f0f4ff;
    --error-bg: rgba(255, 71, 87, 0.1);
    --error-color: #ff4757;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --scrollbar-track: #f0f4ff;
    --scrollbar-thumb: #4a6cff;
    --vs-bg: #4a6cff;
    --vs-shadow: rgba(74, 108, 255, 0.3);
    --footer-color: #666;
    --item-description: #555;
    --note-color: #666;
    --rating-color: #ff9500;
    --tagline-color: #666;
}

.tagline {
    color: var(--tagline-color);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    text-align: center;
    font-style: italic;
}



@media screen and (max-width: 768px) {
    .container {
        width: 100%;
        height: 100vh;
        padding: 0.75rem;
        border-radius: 0;
        border: none;
    }

    header {
        margin-bottom: 0.5rem;
        padding: 0.25rem 0;
    }

    h1 {
        font-size: 1.5rem;
        margin-bottom: 0;
    }

    .tagline {
        font-size: 0.75rem;
        margin-top: 0.25rem;
        margin-bottom: 0.25rem;
    }

    .comparison-inputs {
        flex-direction: column;
        gap: 0.5rem;
    }

    .vs-container {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .comparison-inputs.hidden-mobile {
        display: none;
    }

    .button-container {
        margin-top: 0.5rem;
    }

    #compare-btn {
        width: 100%;
        padding: 0.8rem;
    }

    #results-container {
        margin-top: 0.5rem;
    }
}

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


body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-gradient);
    background-size: 200% 200%;
    animation: gradientAnimation 10s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    color: var(--text-color);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    transition: background 0.3s ease;
    position: relative;
}

.container {
    width: 90%;
    max-width: 1000px;
    height: 90vh;
    background-color: var(--container-bg);
    border-radius: 20px;
    border: 2px solid var(--input-border);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: background-color 0.3s ease, border 0.3s ease;
    overflow: visible;
}

header {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    margin-bottom: 2rem;
    position: relative;
    gap: 0.5rem;
}

.header-buttons {
    position: absolute;
    right: 0;
    top: 0;
}

h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    transition: color 0.3s ease;
}

.header-buttons {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--footer-color);
    cursor: pointer;
    transition: color 0.3s, background-color 0.3s;
    padding: 0.5rem;
    border-radius: 50%;
}

.icon-btn:hover {
    color: var(--error-color);
    background-color: var(--error-bg);
}



main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    overflow: hidden;
}

.comparison-inputs {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.input-container {
    flex: 1;
}

input[type="text"] {
    width: 100%;
    padding: 1rem 1.5rem;
    border: 2px solid var(--input-border);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s;
    background-color: var(--input-bg);
    color: var(--text-color);
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    border-width: 3px;
    background-color: var(--container-bg);
}

.vs-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 60px;
    height: 60px;
    background-color: var(--vs-bg);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.2rem;
    transition: transform 0.3s, border 0.3s;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

@keyframes vsRotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.vs-container.rotating {
    animation: vsRotate 2s linear infinite;
}

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

.vs-container:hover {
    border-width: 3px;
}

.button-container {
    display: flex;
    justify-content: center;
    margin-top: 0.5rem;
}

#compare-btn {
    width: 100%;
    max-width: 400px;
    padding: 0.8rem 2.5rem;
    background-color: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-hover);
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

#compare-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    border-width: 3px;
}

#compare-btn:active:not(:disabled) {
    transform: translateY(0);
    border-color: var(--primary-color);
}

#compare-btn:disabled {
    background-color: #c3cfe2;
    cursor: not-allowed;
    border-color: #c3cfe2;
}

.progress-bar {
    width: 100%;
    max-width: 400px;
    height: 6px;
    background-color: var(--input-bg);
    border-radius: 3px;
    margin-top: 1rem;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    width: 0%;
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.3s ease-in-out;
    position: absolute;
    left: 0;
    top: 0;
}

#results-container {
    flex: 1;
    overflow-y: auto;
    margin-top: 1rem;
    padding-right: 0.5rem;
    /* Firefox scrollbar styling */
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
    transition: scrollbar-color 0.3s ease;
}

/* WebKit scrollbar styling (Chrome, Safari, Edge) */
#results-container::-webkit-scrollbar {
    width: 8px;
}

#results-container::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
    border-radius: 10px;
    transition: background 0.3s ease;
}

#results-container::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb);
    border-radius: 10px;
    border: 2px solid var(--scrollbar-track);
    transition: background-color 0.3s ease, border 0.3s ease;
}

#results-container::-webkit-scrollbar-thumb:hover {
    background-color: var(--primary-hover);
}

.comparison-header {
    margin-bottom: 1.5rem;
    text-align: center;
}

.comparison-header h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 600;
    transition: color 0.3s ease;
}

.comparison-section {
    margin-bottom: 1.5rem;
    padding: 1.2rem;
    background-color: var(--container-bg);
    border-radius: 12px;
    border: 2px solid var(--input-border);
    transition: all 0.3s;
    position: relative;
    z-index: 1;
}

.comparison-section:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.comparison-factor, .conclusion-header {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 600;
    transition: color 0.3s ease;
}

.comparison-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-right: 5px;
    transition: all 0.3s ease;
}

/* WebKit scrollbar styling for comparison items */
.comparison-items::-webkit-scrollbar {
    width: 6px;
}

.comparison-items::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
    border-radius: 8px;
    transition: background 0.3s ease;
}

.comparison-items::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb);
    border-radius: 8px;
    border: 1px solid var(--scrollbar-track);
    transition: background-color 0.3s ease, border 0.3s ease;
}

.comparison-items::-webkit-scrollbar-thumb:hover {
    background-color: var(--primary-hover);
}

.comparison-item {
    padding: 0.8rem;
    background-color: var(--item-bg);
    border-radius: 8px;
    transition: background-color 0.3s ease, border-left 0.3s ease;
}

.item-header {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.item-description {
    font-size: 0.9rem;
    color: var(--item-description);
    margin-bottom: 0.5rem;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.item-rating {
    font-weight: 600;
    color: var(--rating-color);
    transition: color 0.3s ease;
}

.rating-low {
    color: #ff4757 !important; /* Red for ratings 0-3 */
}

.rating-medium {
    color: #ffa502 !important; /* Yellow for ratings 3-7 */
}

.rating-high {
    color: #2ed573 !important; /* Green for ratings above 7 */
}

.conclusion {
    background-color: var(--conclusion-bg);
    border-left: 4px solid var(--primary-color);
    transition: background-color 0.3s ease, border-left 0.3s ease;
}

.conclusion-text {
    line-height: 1.5;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.comparison-note {
    font-size: 0.9rem;
    color: var(--note-color);
    margin-top: 0.5rem;
    font-style: italic;
    transition: color 0.3s ease;
}

.share-btn {
    padding: 0.5rem 1.5rem;
    background-color: #2ed573;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.clear-results-btn {
    padding: 0.5rem 1.5rem;
    background-color: #888;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.clear-results-btn:hover {
    background-color: #666;
}

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

.share-btn:hover {
    background-color: #26af5f;
}

.comparison-section h3 {
    color: #4a6cff;
    margin-bottom: 0.8rem;
    font-size: 1.2rem;
    font-weight: 600;
}

.comparison-paragraph {
    line-height: 1.6;
    color: #444;
    font-family: 'Poppins', sans-serif;
}

.error-message {
    color: var(--error-color);
    text-align: center;
    padding: 1rem;
    background-color: var(--error-bg);
    border-radius: 8px;
    transition: color 0.3s ease, background-color 0.3s ease;
}

.hidden {
    display: none;
}

footer {
    margin-bottom: 20px;
    margin-top: 1.5rem;
    text-align: center;
    color: var(--footer-color);
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 1.5rem;
        height: 95vh;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .comparison-inputs {
        flex-direction: column;
    }
    
    .vs-container {
        margin: 0.5rem 0;
    }
}