:root {
    --dog-gradient-start: #ffb74d; /* Amber */
    --dog-gradient-end: #ff8a65;   /* Orange */
    --cat-gradient-start: #7e57c2; /* Purple */
    --cat-gradient-end: #a1887f;   /* Brown */
    --card-bg-color: rgba(255, 255, 255, 0.1);
    --card-border-color: rgba(255, 255, 255, 0.2);
    --text-color: #f0f0f0;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --transition-speed: 0.4s;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 2rem;
    color: var(--text-color);
    background-color: var(--cat-gradient-start); /* Default background */
    background-image: linear-gradient(135deg, var(--cat-gradient-start) 0%, var(--cat-gradient-end) 100%);
    transition: background-image var(--transition-speed) ease-in-out;
    min-height: 100vh;
    box-sizing: border-box;
}

body.dog-bg {
    background-image: linear-gradient(135deg, var(--dog-gradient-start) 0%, var(--dog-gradient-end) 100%);
}

body.cat-bg {
    background-image: linear-gradient(135deg, var(--cat-gradient-start) 0%, var(--cat-gradient-end) 100%);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto 2rem auto;
    flex-wrap: wrap; 
}

.title-container {
    text-align: center;
    flex-grow: 1;
}

h1[data-i18n="appTitle"] {
    font-size: 2.5rem; 
    font-weight: 700;
    margin: 0;
    white-space: nowrap;
}

.subtitle {
    font-size: 1rem;
    margin: 0;
    opacity: 0.9;
}

.language-selector-container {
    position: relative;
}

#language-selector {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--card-bg-color);
    color: var(--text-color);
    border: 1px solid var(--card-border-color);
    padding: 0.5rem 2rem 0.5rem 1rem;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23f0f0f0%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.4-12.8z%22/%3E%3C/svg%3E');
    background-repeat: no-repeat;
    background-position: right 0.7rem top 50%;
    background-size: .65rem auto;
}

.bento-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 1200px;
    margin: auto;
}

@media (min-width: 768px) {
    .bento-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    h1[data-i18n="appTitle"] { font-size: 3rem; }
}

.bento-box {
    padding: 2rem;
    border-radius: 20px;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    display: flex;
    flex-direction: column;
}

.bento-box:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.glass-card {
    background-color: var(--card-bg-color);
    -webkit-backdrop-filter: blur(15px);
    backdrop-filter: blur(15px);
    border: 1px solid var(--card-border-color);
    box-shadow: 0 5px 20px var(--shadow-color);
}

.upload-area {
    border: 2px dashed var(--card-border-color);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: background-color var(--transition-speed);
    min-height: 250px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.upload-area.drag-over {
    background-color: rgba(255, 255, 255, 0.2);
}

.upload-area p {
    font-size: 1.2rem;
    margin: 0;
}

.upload-area small {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-top: 0.5rem;
}

#animal-selector {
    text-align: center;
    margin-top: 1rem;
}

.pet-type-btn {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--card-border-color);
    color: var(--text-color);
    padding: 0.8rem 1.5rem;
    border-radius: 15px;
    cursor: pointer;
    transition: background-color var(--transition-speed);
    margin: 0 0.5rem;
    font-size: 1rem;
}

.pet-type-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

#preview-image {
    max-width: 100%;
    max-height: 100%;
    border-radius: 10px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#analysis-container {
    justify-content: center;
}

#analysis-container h2 {
    text-align: center;
    font-weight: 600;
    font-size: 2rem;
    margin: 0;
}

.hidden {
    display: none !important;
}

#emotion-result {
    margin-top: 1rem;
    text-align: center;
}

#emotion-result p {
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.feedback-buttons {
    display: inline-flex;
    gap: 0.5rem;
    margin-left: 1rem;
}

.thumb-btn {
    background: none;
    border: 1px solid var(--card-border-color);
    color: var(--text-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color var(--transition-speed), transform 0.2s;
}

.thumb-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

#analysis-content {
    width: 100%;
}

#analysis-content h3 {
    display: flex;
    justify-content: space-between;
    align-items: baseline; 
    border-bottom: 1px solid var(--card-border-color);
    padding-bottom: 0.5rem;
    margin-top: 2rem;
}

.retrain-subtitle {
    font-size: 50%;
    opacity: 0.8;
    font-weight: normal;
}

#prob-bars .bar-container {
    display: flex;
    align-items: center;
    margin: 0.8rem 0;
}

#prob-bars .emotion-label {
    width: 120px;
    font-size: 0.9rem;
    flex-shrink: 0;
}

#prob-bars .progress-bar {
    flex-grow: 1;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 5px;
    overflow: hidden;
    height: 15px;
}

#prob-bars .progress {
    height: 100%;
    border-radius: 5px;
    background-color: #81c784; 
    width: 0%; 
    transition: width var(--transition-speed) ease;
}

#prob-bars .percentage {
    width: 50px;
    text-align: right;
    font-size: 0.9rem;
    flex-shrink: 0;
}

#interpretation-text {
    font-size: 1rem;
    line-height: 1.6;
    margin-top: 1rem;
    height: 120px; 
    overflow-y: auto; 
}

#emotion-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
    justify-content: space-between;
}

.emotion-btn {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--card-border-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 15px;
    cursor: pointer;
    transition: background-color var(--transition-speed);
    flex-basis: calc(33.333% - 0.5rem);
    text-align: center;
}

.emotion-btn:nth-last-child(-n+2) {
    flex-basis: calc(50% - 0.5rem);
}

.emotion-btn.selected {
    background-color: rgba(129, 199, 132, 0.5); /* Greenish */
    border-color: #81c784;
}

#retrain-btn, #reset-btn {
    display: block;
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    margin-top: 1.5rem;
    background-color: #81c784;
    color: #111;
    transition: transform 0.2s, background-color var(--transition-speed);
}

#retrain-btn:hover, #reset-btn:hover {
    transform: scale(1.03);
    background-color: #a5d6a7;
}

.footer-container {
    max-width: 600px;
    margin: 2rem auto 0;
}