:root {
    /* Light theme variables */
    --bg-primary-light: #ffffff;
    --bg-secondary-light: #f5f5f5;
    --text-primary-light: #333333;
    --text-secondary-light: #666666;
    --accent-light: #4CAF50;
    --border-light: #e0e0e0;
    --shadow-light: rgba(0, 0, 0, 0.1);

    /* Dark theme variables */
    --bg-primary-dark: #1a1a1a;
    --bg-secondary-dark: #2d2d2d;
    --text-primary-dark: #ffffff;
    --text-secondary-dark: #b3b3b3;
    --accent-dark: #66bb6a;
    --border-dark: #404040;
    --shadow-dark: rgba(0, 0, 0, 0.3);

    /* Common variables */
    --border-radius: 12px;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Inter', 'Poppins', Arial, sans-serif;
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

body.dark-mode {
    background-color: var(--bg-primary-dark);
    color: var(--text-primary-dark);
}

body:not(.dark-mode) {
    background-color: var(--bg-primary-light);
    color: var(--text-primary-light);
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.theme-toggle {
    position: fixed;
    top: 1rem;
    left: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    padding: 0.5rem;
    border-radius: 50%;
    transition: transform var(--transition-speed);
}

.theme-toggle:hover {
    transform: scale(1.1);
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #1B5E20;
}

.subtitle {
    color: #2E7D32;
    font-size: 1.1rem;
}

.dark-mode h1 {
    color: #81C784;
}

.dark-mode .subtitle {
    color: #A5D6A7;
}

:not(.dark-mode) .subtitle {
    color: var(--text-secondary-light);
}

.input-section {
    margin-bottom: 2rem;
}

textarea {
    width: 100%;
    padding: 1rem;
    border-radius: var(--border-radius);
    border: 2px solid var(--border-dark);
    background-color: var(--bg-secondary-dark);
    color: var(--text-primary-dark);
    font-size: 1rem;
    resize: vertical;
    transition: border-color var(--transition-speed), background-color var(--transition-speed);
}

.dark-mode textarea {
    border-color: var(--border-dark);
    background-color: var(--bg-secondary-dark);
    color: var(--text-primary-dark);
}

:not(.dark-mode) textarea {
    border-color: var(--border-light);
    background-color: var(--bg-secondary-light);
    color: var(--text-primary-light);
}

textarea:focus {
    outline: none;
    border-color: var(--accent-dark);
}

.primary-btn {
    display: block;
    width: 100%;
    padding: 1rem;
    margin-top: 1rem;
    background-color: var(--accent-dark);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform var(--transition-speed), background-color var(--transition-speed);
}

.primary-btn:hover {
    transform: translateY(-2px);
    background-color: var(--accent-light);
}

.results-section {
    background-color: var(--bg-secondary-dark);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 2rem;
    box-shadow: 0 4px 6px var(--shadow-dark);
    animation: slideIn 0.5s ease-out;
}

.dark-mode .results-section {
    background-color: var(--bg-secondary-dark);
}

:not(.dark-mode) .results-section {
    background-color: var(--bg-secondary-light);
}

.results-section h2 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
    color: #1B5E20;
}

.dark-mode .results-section h2 {
    color: #81C784;
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.result-item {
    background-color: var(--bg-primary-light);
    border-radius: var(--border-radius);
    padding: 1rem;
    animation: fadeIn 0.5s ease-out;
}

.dark-mode .result-item {
    background-color: var(--bg-secondary-dark);
    color: #000000;
}

:not(.dark-mode) .result-item {
    background-color: var(--bg-primary-light);
}

.result-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #000000;
}

.dark-mode .result-item h3 {
    color: #000000 !important;
}

.result-item p {
    color: #000000;
    font-size: 0.95rem;
    line-height: 1.6;
}

.dark-mode .result-item p {
    color: #000000 !important;
}

.deiso-link {
    color: var(--accent-dark);
    text-decoration: none;
    transition: color var(--transition-speed);
}

.deiso-link:hover {
    color: var(--accent-light);
    text-decoration: underline;
}

.no-results {
    text-align: center;
    padding: 2rem;
    background-color: var(--bg-secondary-dark);
    border-radius: var(--border-radius);
    margin-top: 2rem;
    animation: fadeIn 0.5s ease-out;
}

.hidden {
    display: none;
}

footer {
    margin-top: auto;
    padding-top: 2rem;
    text-align: center;
}

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

.footer-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--bg-secondary-dark);
    color: var(--text-primary-dark);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: transform var(--transition-speed), background-color var(--transition-speed);
}

.dark-mode .footer-btn {
    background-color: var(--bg-secondary-dark);
    color: var(--text-primary-dark);
}

:not(.dark-mode) .footer-btn {
    background-color: var(--bg-secondary-light);
    color: var(--text-primary-light);
}

.footer-btn:hover {
    transform: translateY(-2px);
    background-color: var(--accent-dark);
    color: white;
}

.version-tag {
    font-size: 0.9rem;
    color: var(--text-secondary-dark);
    margin-top: 1rem;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    .footer-buttons {
        flex-direction: column;
    }

    .footer-btn {
        width: 100%;
    }
}