:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5a623;
    --background-color: #f0f2f5;
    --text-color: #333;
    --white: #fff;
    --container-bg: var(--white);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --btn-hover: #357abd;
    --header-bg: rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] {
    --background-color: #1a1a1a;
    --text-color: #f0f2f5;
    --container-bg: #2d2d2d;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --primary-color: #64b5f6;
    --btn-hover: #42a5f5;
    --header-bg: rgba(45, 45, 45, 0.9);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
        Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header & Nav */
.main-header {
    position: sticky;
    top: 0;
    background-color: var(--header-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.nav-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    margin-left: 1.5rem;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-color);
    margin-left: 1rem;
}

/* Main Layout */
.container {
    background-color: var(--container-bg);
    padding: 3rem 2rem;
    margin: 2rem auto;
    border-radius: 1rem;
    box-shadow: 0 10px 25px var(--shadow-color);
    text-align: center;
    width: 90%;
    max-width: 800px;
}

.tool-section {
    margin-bottom: 4rem;
}

.description-text {
    max-width: 600px;
    margin: 1rem auto 2rem;
    font-size: 1.1rem;
    opacity: 0.9;
}

h1 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 2.5rem;
}

.article-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    text-align: left;
    margin-top: 2rem;
}

.article-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Tool Components */
.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.number {
    width: 3.5rem;
    height: 3.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--secondary-color);
    color: var(--white);
    font-size: 1.8rem;
    font-weight: bold;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(245, 166, 35, 0.3);
}

#generator-btn, #upload-btn, .submit-btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

#generator-btn:hover, #upload-btn:hover, .submit-btn:hover {
    background-color: var(--btn-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--shadow-color);
}

/* Animal Face Styles */
#image-preview-container {
    margin: 2rem auto;
    width: 300px;
    height: 300px;
    border-radius: 1.5rem;
    overflow: hidden;
    background-color: var(--background-color);
    box-shadow: 0 10px 30px var(--shadow-color);
    display: flex;
    justify-content: center;
    align-items: center;
    border: 3px solid var(--primary-color);
}

#image-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#label-container {
    max-width: 400px;
    margin: 0 auto 2rem;
}

.prediction-bar {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 1rem;
}

.label-name {
    width: 80px;
    text-align: right;
    font-weight: bold;
}

.bar-wrapper {
    flex-grow: 1;
    background-color: var(--background-color);
    height: 24px;
    border-radius: 12px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color), #ffcc00);
    transition: width 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Form Styles */
.inquiry-form {
    max-width: 500px;
    margin: 2rem auto;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.inquiry-form input, .inquiry-form textarea {
    padding: 1rem;
    border-radius: 0.6rem;
    border: 2px solid var(--shadow-color);
    background-color: var(--background-color);
    color: var(--text-color);
    font-size: 1rem;
}

/* Footer */
.main-footer {
    background-color: var(--container-bg);
    padding: 3rem 0;
    margin-top: 4rem;
    text-align: center;
    border-top: 1px solid var(--shadow-color);
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: var(--primary-color);
    margin: 0 1rem;
    text-decoration: none;
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    .article-grid {
        grid-template-columns: 1fr;
    }
    .nav-links {
        display: none;
    }
}