/* CSS Variables for Theme Support */
:root {
    /* Dark Mode (Default) - Enhanced colors */
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --text-primary: #ffffff;
    --text-secondary: #d0d0d0;
    --text-muted: #999999;
    --accent-primary: #ff6b9d;
    --accent-secondary: #c44569;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    --border-color: #333333;
    --shadow: rgba(0, 0, 0, 0.5);
}

/* Light Mode - Enhanced colors */
.light-mode {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #0f0f0f;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --accent-primary: #ff6b9d;
    --accent-secondary: #c44569;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    --border-color: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background-color: var(--bg-secondary);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-background {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--bg-tertiary);
    padding: 0.5rem 1rem;
    border-radius: 8px 0 0 0;
    transition: background-color 0.3s ease;
}

.logo-icon {
    font-size: 1.75rem;
    line-height: 1;
    flex-shrink: 0;
    display: inline-block;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.logo-text-karaoke {
    color: #ff6b9d;
}

.logo-text-queue {
    color: #a855f7;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
    transition: width 0.3s ease;
}

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

.nav-link:hover::after {
    width: 100%;
}

.nav-link:hover::after {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: transform 0.3s ease, color 0.3s ease;
    border-radius: 50%;
    width: 40px;
    height: 40px;
}

.theme-toggle:hover {
    transform: rotate(15deg);
    color: var(--accent-primary);
    background-color: rgba(255, 107, 157, 0.1);
}

.theme-icon {
    width: 20px;
    height: 20px;
    stroke-width: 2;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.light-mode .sun-icon {
    opacity: 0;
    transform: rotate(90deg);
}

.light-mode .moon-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.dark-mode .sun-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.dark-mode .moon-icon {
    opacity: 0;
    transform: rotate(-90deg);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 20px;
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.12), rgba(168, 85, 247, 0.12));
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
    color: white;
    box-shadow: 0 4px 20px rgba(255, 107, 157, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 107, 157, 0.5);
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-primary);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

/* Carousel Section */
.carousel-section {
    padding: 4rem 0;
    background-color: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

.carousel-container {
    max-width: 1280px;
    margin: 0 auto;
    position: relative;
}

.carousel {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 10px 40px var(--shadow);
    background-color: var(--bg-primary);
    aspect-ratio: 16 / 10;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
    will-change: transform;
}

.carousel-slide {
    min-width: 100%;
    width: 100%;
    flex-shrink: 0;
    position: relative;
    display: block;
    overflow: hidden;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    background-color: var(--bg-primary);
}

@media (max-width: 768px) {
    .carousel-slide img {
        max-height: 60vh;
    }
}

@media (max-width: 480px) {
    .carousel-slide img {
        max-height: 50vh;
    }
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    border: none;
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
    backdrop-filter: blur(10px);
}

.carousel-btn:hover {
    background-color: rgba(0, 0, 0, 0.7);
    transform: translateY(-50%) scale(1.1);
}

.carousel-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.carousel-btn svg {
    width: 24px;
    height: 24px;
}

.carousel-btn-prev {
    left: 20px;
}

.carousel-btn-next {
    right: 20px;
}

.carousel-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background-color: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.carousel-dot:hover {
    background-color: rgba(255, 255, 255, 0.5);
    transform: scale(1.2);
}

.carousel-dot.active {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    width: 32px;
    border-radius: 6px;
}

/* Features Section */
.features {
    padding: 5rem 0;
    background-color: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.feature-card {
    background-color: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow);
    border-color: var(--accent-primary);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 5rem 0;
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease;
}

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

.about-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.about-text p {
    margin-bottom: 1.5rem;
}

/* FAQ Section */
.faq {
    padding: 5rem 0;
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--bg-secondary);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 4px 12px var(--shadow);
}

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 600;
    transition: color 0.3s ease;
    font-family: inherit;
}

.faq-question:hover {
    color: var(--accent-primary);
}

.faq-question span {
    flex: 1;
    padding-right: 1rem;
}

.faq-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    color: var(--accent-primary);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 1.5rem;
}

.faq-question[aria-expanded="true"] + .faq-answer {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0;
}

.faq-answer a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.faq-answer a:hover {
    color: var(--accent-purple);
    text-decoration: underline;
}

/* PRO Coming Soon Section */
.pro-coming-soon {
    padding: 5rem 0;
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.15), rgba(168, 85, 247, 0.15));
    position: relative;
    overflow: hidden;
}

.pro-coming-soon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.05), rgba(168, 85, 247, 0.05));
    z-index: 0;
}

.pro-coming-soon .container {
    position: relative;
    z-index: 1;
}

.pro-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin: 0 auto 1rem;
    display: block;
    width: fit-content;
    box-shadow: 0 4px 20px rgba(255, 107, 157, 0.4);
}

.pro-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.pro-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.pro-feature-card {
    background-color: var(--bg-primary);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.pro-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.pro-feature-card:hover::before {
    transform: scaleX(1);
}

.pro-feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow);
    border-color: var(--accent-primary);
}

.pro-feature-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
}

.pro-feature-icon svg {
    width: 48px;
    height: 48px;
}

.pro-feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pro-feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.pro-cta {
    text-align: center;
    margin-top: 3rem;
}

.pro-notify-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Contact Section */
.contact {
    padding: 5rem 0;
    background-color: var(--bg-secondary);
    text-align: center;
    transition: background-color 0.3s ease;
}

.contact-text {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Notify Me Form Section */
.notify-form-section {
    padding: 5rem 0;
    min-height: 70vh;
    display: flex;
    align-items: center;
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease;
}

.notify-form-container {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--bg-secondary);
    padding: 3rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px var(--shadow);
}

.notify-form-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.notify-form {
    width: 100%;
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    font-family: inherit;
}

textarea.form-input {
    resize: vertical;
    min-height: 120px;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 157, 0.15);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-message {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    display: block;
    background-color: rgba(76, 175, 80, 0.1);
    color: #4caf50;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.form-message.error {
    display: block;
    background-color: rgba(244, 67, 54, 0.1);
    color: #f44336;
    border: 1px solid rgba(244, 67, 54, 0.3);
}

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

.form-footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.back-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: var(--accent-purple);
}

/* Footer */
.footer {
    background-color: var(--bg-tertiary);
    padding: 3rem 0 1.5rem;
    border-top: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

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

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-section h4 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive Design */
/* Carousel Responsive Styles */
@media (max-width: 768px) {
    .carousel-section {
        padding: 2rem 0;
    }

    .carousel-btn {
        width: 40px;
        height: 40px;
    }

    .carousel-btn svg {
        width: 20px;
        height: 20px;
    }

    .carousel-btn-prev {
        left: 10px;
    }

    .carousel-btn-next {
        right: 10px;
    }

    .carousel-dots {
        bottom: 15px;
    }

    .carousel-dot {
        width: 10px;
        height: 10px;
    }

    .carousel-dot.active {
        width: 24px;
    }
}

@media (max-width: 480px) {
    .carousel-btn {
        width: 36px;
        height: 36px;
    }

    .carousel-btn svg {
        width: 18px;
        height: 18px;
    }

    .carousel-btn-prev {
        left: 5px;
    }

    .carousel-btn-next {
        right: 5px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-secondary);
        width: 100%;
        text-align: center;
        transition: left 0.3s ease;
        padding: 2rem 0;
        border-top: 1px solid var(--border-color);
        gap: 1rem;
    }

    .nav-menu.active {
        left: 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .contact-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .notify-form-container {
        padding: 2rem 1.5rem;
    }
}