:root {
    /* Light Theme Colors */
    --bg-color: #f0f2f5;
    --container-bg: #ffffff;
    --text-color: #333333;
    --heading-color: #ff6b6b;
    --input-border: #cccccc;
    --button-bg: #ff6b6b;
    --button-hover: #ff4757;
    --button-text: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --nav-bg: #f8f9fa;
}

[data-theme="dark"] {
    /* Dark Theme Colors */
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --heading-color: #ff8e8e;
    --input-border: #444444;
    --button-bg: #ff6b6b;
    --button-hover: #ff8e8e;
    --button-text: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --nav-bg: #2d2d2d;
}

* {
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 0;
    min-height: 100vh;
    margin: 0;
}

.container {
    background-color: var(--container-bg);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px var(--shadow-color);
    text-align: center;
    width: 90%;
    max-width: 650px;
    position: relative;
    margin-top: 2rem;
    margin-bottom: 2rem;
}

.main-header {
    margin-bottom: 2.5rem;
}

.main-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.main-header p {
    font-size: 1.1rem;
    opacity: 0.8;
}

.content-info {
    text-align: left;
    background: var(--nav-bg);
    padding: 1.5rem;
    border-radius: 12px;
    margin-top: 2rem;
    line-height: 1.6;
}

.content-info h4 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--heading-color);
}

.content-info p {
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.sub-btn {
    background-color: transparent;
    border: 2px solid var(--button-bg);
    color: var(--button-bg);
    margin-top: 1rem;
}

.sub-btn:hover {
    background-color: var(--button-bg);
    color: white;
}

.app-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--input-border);
    font-size: 0.9rem;
}

.theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text-color);
    z-index: 10;
}

/* Navigation */
.app-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    background: var(--nav-bg);
    padding: 0.5rem;
    border-radius: 12px;
}

.nav-btn {
    padding: 0.6rem 1.2rem;
    border: none;
    background: none;
    color: var(--text-color);
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s;
}

.nav-btn.active {
    background: var(--button-bg);
    color: white;
}

/* Sections */
.app-section {
    display: none;
}

.app-section.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

h1 {
    color: var(--heading-color);
    margin-bottom: 0.5rem;
    font-size: 2.2rem;
}

.section-desc {
    opacity: 0.8;
    margin-bottom: 2rem;
}

/* Animal Test Styles */
.upload-container {
    transition: all 0.3s ease;
    border: 2px dashed var(--input-border);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.upload-icon {
    font-size: 3rem;
}

#image-preview {
    max-width: 100%;
    max-height: 300px;
    border-radius: 8px;
    margin-top: 1rem;
}

.main-btn {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
}

/* Progress Bars for Results */
.result-area {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--nav-bg);
    border-radius: 12px;
    text-align: left;
}

.result-bar-wrapper {
    margin-bottom: 1rem;
}

.label-text {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.4rem;
    font-weight: 600;
}

.progress-bar-bg {
    height: 12px;
    background: var(--input-border);
    border-radius: 6px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--heading-color);
    width: 0%;
    transition: width 1s ease-out;
}

#final-verdict {
    text-align: center;
    font-size: 1.3rem;
    font-weight: bold;
    margin-top: 1.5rem;
    color: var(--heading-color);
}

/* Lucky Draw Styles (Shared) */
.input-container {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

#name {
    flex-grow: 1;
    padding: 0.8rem 1rem;
    border: 2px solid var(--input-border);
    border-radius: 8px;
    background-color: var(--container-bg);
    color: var(--text-color);
    outline: none;
}

button {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    background-color: var(--button-bg);
    color: var(--button-text);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

button:hover:not(:disabled) {
    background-color: var(--button-hover);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Forms & Comments */
.partnership-container, .comments-container {
    margin-top: 3rem;
    text-align: left;
}

.partnership-container hr, .comments-container hr {
    border: none;
    border-top: 1px solid var(--input-border);
    margin-bottom: 1.5rem;
}

.form-group { margin-bottom: 1rem; }
.form-group input, .form-group textarea {
    width: 100%; padding: 0.8rem; border-radius: 8px; border: 1px solid var(--input-border);
    background: var(--container-bg); color: var(--text-color);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0,0,0,.1);
    border-radius: 50%;
    border-top-color: var(--heading-color);
    animation: spin 1s ease-in-out infinite;
    margin: 20px auto;
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.upload-container.dragover { background-color: rgba(255, 107, 107, 0.1); border-color: var(--heading-color); }