/* Reset and Base Styles */
:root {
    --primary-color: #000000;
    --secondary-color: #1C2526;
    --text-color: #FFFFFF;
    --text-secondary: #D3D3D3;
    --accent-color: #FFD700;
    --border-color: #A9A9A9;
    --error-color: #FF0000;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--primary-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

/* Header and Navigation */
.header {
    background-color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Montserrat', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    transition: color var(--transition-speed);
}

.logo:hover {
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1rem;
    transition: color var(--transition-speed);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background-color: var(--secondary-color);
    padding: 4rem 1rem;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    margin-bottom: 1rem;
}

.tagline {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-speed);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--primary-color);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.btn:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

/* Features Section */
.features {
    padding: 4rem 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background-color: var(--secondary-color);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    transition: transform var(--transition-speed);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    padding: 4rem 1rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color var(--transition-speed);
}

.footer-section a:hover {
    color: var(--accent-color);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    font-size: 1.5rem;
}

.newsletter-form {
    display: flex;
    gap: 0.5rem;
}

.newsletter-form input {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    background-color: var(--primary-color);
    color: var(--text-color);
    border-radius: 4px;
    flex: 1;
}

.newsletter-form button {
    padding: 0.5rem 1rem;
    background-color: var(--accent-color);
    color: var(--primary-color);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity var(--transition-speed);
}

.newsletter-form button:hover {
    opacity: 0.9;
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom a {
    color: var(--accent-color);
    text-decoration: none;
}

/* Ad Containers */
.ad-container {
    max-width: 1200px;
    margin: 2rem auto;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--primary-color);
        padding: 1rem;
        flex-direction: column;
        align-items: center;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .cta-buttons {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .newsletter-form {
        flex-direction: column;
    }
}

/* Accessibility */
:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--text-secondary);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Error Messages */
.error-message {
    color: var(--error-color);
    background-color: rgba(255, 0, 0, 0.1);
    padding: 0.5rem;
    border-radius: 4px;
    margin: 0.5rem 0;
    text-align: center;
}

/* Success Messages */
.success-message {
    color: var(--accent-color);
    background-color: rgba(255, 215, 0, 0.1);
    padding: 0.5rem;
    border-radius: 4px;
    margin: 0.5rem 0;
    text-align: center;
}

/* Tool-specific Styles */
.converter {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.tool-description {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Mode Selection */
.mode-selection {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.mode-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.mode-btn:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
}

.mode-btn.active {
    background-color: var(--accent-color);
    color: var(--primary-color);
}

/* Upload Area */
.upload-area {
    margin-bottom: 2rem;
}

.drop-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-speed);
    background-color: var(--secondary-color);
}

.drop-area.drag-over {
    border-color: var(--accent-color);
    background-color: rgba(255, 215, 0, 0.1);
}

.drop-area i {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

/* Preview Area */
.preview-area {
    margin-bottom: 2rem;
}

.preview-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.preview-box {
    background-color: var(--secondary-color);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
}

.preview-box h3 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.preview-box canvas {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

/* Controls */
.controls {
    background-color: var(--secondary-color);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.control-group {
    margin-bottom: 1.5rem;
}

.control-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.control-group input[type="range"] {
    width: 100%;
    margin-bottom: 0.5rem;
}

.intensity-value {
    color: var(--accent-color);
    font-weight: bold;
}

.control-group select {
    width: 100%;
    padding: 0.5rem;
    background-color: var(--primary-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.button-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* How to Use Section */
.how-to-use {
    background-color: var(--secondary-color);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.how-to-use ol {
    margin-left: 1.5rem;
    color: var(--text-secondary);
}

.how-to-use li {
    margin-bottom: 0.5rem;
}

/* FAQ Section */
.faq {
    background-color: var(--secondary-color);
    padding: 2rem;
    border-radius: 8px;
}

.faq-item {
    margin-bottom: 1.5rem;
}

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

.faq-item p {
    color: var(--text-secondary);
}

/* Responsive Design for Tool */
@media (max-width: 768px) {
    .preview-container {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
    }

    .button-group .btn {
        width: 100%;
    }

    .mode-selection {
        flex-direction: column;
    }

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

.site-logo {
    height: 48px;
    width: auto;
    max-width: 180px;
    display: block;
    margin-right: 1rem;
}

.footer-logo {
    height: 40px;
    width: auto;
    max-width: 150px;
    display: block;
    margin-bottom: 1rem;
}

.footer-logo-link {
    display: inline-block;
}

/* Header nav improvements */
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.nav-links {
    display: flex;
    gap: 1.2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1rem;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    transition: background var(--transition-speed), color var(--transition-speed);
}

.nav-link:hover, .nav-link.active {
    background: var(--accent-color);
    color: var(--primary-color);
}

.tools-dropdown {
    position: relative;
    cursor: pointer;
}

.tools-dropdown .dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    min-width: 180px;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.tools-dropdown:focus .dropdown-content,
.tools-dropdown:hover .dropdown-content {
    display: block;
}

.tools-dropdown .dropdown-content a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
}

.tools-dropdown .dropdown-content a:last-child {
    border-bottom: none;
}

.tools-dropdown .dropdown-content a.active,
.tools-dropdown .dropdown-content a:hover {
    background: var(--accent-color);
    color: var(--primary-color);
}

/* Responsive header/footer */
@media (max-width: 900px) {
    .nav-links {
        flex-direction: column;
        align-items: flex-start;
        background: var(--primary-color);
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        display: none;
        padding: 1rem 2rem;
        border-bottom: 1px solid var(--border-color);
    }
    .nav-links.active {
        display: flex;
    }
    .site-logo {
        height: 38px;
        max-width: 120px;
    }
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    .footer-section {
        margin-bottom: 1.5rem;
    }
    .footer-logo {
        margin: 0 auto 1rem auto;
    }
}