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

:root {
    /* My Singing Monsters Authentic Colors */
    --msm-primary: #4A90E2;
    /* Ocean Blue */
    --msm-secondary: #7ED321;
    /* Monster Green */
    --msm-accent: #F5A623;
    /* Golden Yellow */
    --msm-pink: #D0021B;
    /* Pink Monster */
    --msm-purple: #9013FE;
    /* Purple Magic */
    --msm-orange: #FF6B35;
    /* Fire Orange */
    --msm-cyan: #50E3C2;
    /* Ethereal Cyan */
    --msm-dark: #1a1a2e;
    --msm-darker: #16213e;
    --msm-light: #ffffff;
    --msm-gray: #8E8E93;
}

html {
    font-size: 100%;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, var(--msm-dark) 0%, var(--msm-darker) 50%, var(--msm-primary) 100%);
    color: var(--msm-light);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animated Background */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.1;
}

.floating-note {
    position: absolute;
    font-size: clamp(20px, 4vw, 40px);
    animation: float-up 6s infinite linear;
    pointer-events: none;
}

@keyframes float-up {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        transform: translateY(-100px) rotate(360deg);
        opacity: 0;
    }
}

/* Header */
.header {
    background: rgba(26, 26, 46, 0.9);
    backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--msm-secondary);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(26, 26, 46, 0.95);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, var(--msm-secondary), var(--msm-cyan));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 8px 25px rgba(126, 211, 33, 0.4);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {

    0%,
    100% {
        box-shadow: 0 8px 25px rgba(126, 211, 33, 0.4);
    }

    50% {
        box-shadow: 0 8px 35px rgba(126, 211, 33, 0.8);
    }
}

.logo-text {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(45deg, var(--msm-secondary), var(--msm-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-items {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-select {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid var(--msm-primary);
    color: var(--msm-light);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.nav-select:hover {
    background: rgba(74, 144, 226, 0.2);
    transform: translateY(-2px);
}

/* Hero Section */
.hero-section {
    padding: clamp(2rem, 8vw, 6rem) 1rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 20%, rgba(126, 211, 33, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(74, 144, 226, 0.1) 0%, transparent 50%);
    z-index: -1;
}

.app-icon {
    width: clamp(120px, 20vw, 180px);
    height: clamp(120px, 20vw, 180px);
    border-radius: 30px;
    margin: 0 auto 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(40px, 8vw, 80px);
    box-shadow: 0 20px 60px rgba(126, 211, 33, 0.3);
    animation: float-icon 4s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}

.app-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shine 3s ease-in-out infinite;
}

@keyframes float-icon {

    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
    }

    50% {
        transform: translateY(-15px) rotate(2deg);
    }
}

@keyframes shine {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }

    50% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }

    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.app-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 900;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--msm-secondary), var(--msm-cyan), var(--msm-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 4px 20px rgba(126, 211, 33, 0.3);
    animation: title-glow 3s ease-in-out infinite;
}

@keyframes title-glow {

    0%,
    100% {
        filter: brightness(1);
    }

    50% {
        filter: brightness(1.2);
    }
}

.app-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.info-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.8rem 1.5rem;
    border-radius: 20px;
    border: 1px solid var(--msm-primary);
    font-weight: 600;
    transition: all 0.3s ease;
}

.info-item:hover {
    background: rgba(74, 144, 226, 0.2);
    transform: scale(1.05);
}

.download-section {
    margin: 3rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.download-btn {
    background: linear-gradient(45deg, var(--msm-purple), var(--msm-pink));
    color: var(--msm-light);
    padding: 1.2rem 3rem;
    border: none;
    border-radius: 50px;
    font-size: 1.3rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 15px 35px rgba(144, 19, 254, 0.4);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.download-btn:hover::before {
    left: 100%;
}

.download-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 20px 50px rgba(144, 19, 254, 0.6);
}

.download-stats {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: 1rem;
}

.stat-number {
    font-size: 2rem;
    font-weight: 900;
    color: var(--msm-accent);
    display: block;
}

.stat-label {
    color: var(--msm-gray);
    font-size: 0.9rem;
}

.description {
    max-width: 900px;
    margin: 3rem auto 0;
    line-height: 1.8;
    color: #e0e0e0;
    font-size: 1.1rem;
    text-align: left;
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 15px;
    border-left: 4px solid var(--msm-secondary);
}

/* Features Section */
.features-section {
    background: rgba(255, 255, 255, 0.02);
    padding: clamp(3rem, 8vw, 6rem) 1rem;
    position: relative;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section-title {
    text-align: center;
    font-size: clamp(2rem, 6vw, 3.5rem);
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--msm-primary), var(--msm-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

.section-subtitle {
    text-align: center;
    font-size: clamp(1.2rem, 4vw, 1.8rem);
    color: var(--msm-cyan);
    margin-bottom: 4rem;
    font-weight: 600;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.feature-card {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
    border: 1px solid rgba(126, 211, 33, 0.3);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--msm-secondary), var(--msm-cyan));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.feature-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 50px rgba(126, 211, 33, 0.2);
}

.feature-card:hover::before {
    opacity: 0.1;
}

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

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--msm-accent);
    margin-bottom: 1rem;
}

.feature-description {
    color: #c0c0c0;
    line-height: 1.6;
}

/* Gaming Features Section */
.gaming-features {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1), rgba(126, 211, 33, 0.1));
    padding: clamp(3rem, 8vw, 6rem) 1rem;
    position: relative;
}

.monsters-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.monster-card {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    border: 2px solid transparent;
    background-clip: padding-box;
    position: relative;
    transition: all 0.4s ease;
}

.monster-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, var(--msm-purple), var(--msm-pink), var(--msm-accent));
    border-radius: 20px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.monster-card:hover::before {
    opacity: 0.3;
}

.monster-card:hover {
    transform: scale(1.05) rotateY(5deg);
}

.monster-emoji {
    font-size: 4rem;
    margin-bottom: 1rem;
    display: block;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.monster-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--msm-light);
    margin-bottom: 0.5rem;
}

.monster-rarity {
    color: var(--msm-accent);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Installation Guide */
.install-section {
    background: rgba(0, 0, 0, 0.2);
    padding: clamp(3rem, 8vw, 6rem) 1rem;
}

.install-steps {
    max-width: 900px;
    margin: 0 auto;
}

.step {
    background: rgba(255, 255, 255, 0.05);
    margin: 1.5rem 0;
    padding: 2rem;
    border-radius: 15px;
    border-left: 5px solid var(--msm-secondary);
    transition: all 0.3s ease;
    position: relative;
}

.step:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(10px);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.step-number {
    background: linear-gradient(45deg, var(--msm-purple), var(--msm-pink));
    color: var(--msm-light);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.step-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--msm-light);
}

.step-content {
    margin-left: 3rem;
    color: #c0c0c0;
    line-height: 1.6;
}

/* FAQ Section */
.faq-section {
    background: linear-gradient(135deg, rgba(144, 19, 254, 0.1), rgba(208, 2, 27, 0.1));
    padding: clamp(3rem, 8vw, 6rem) 1rem;
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: rgba(255, 255, 255, 0.05);
    margin: 1rem 0;
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid rgba(126, 211, 33, 0.3);
    transition: all 0.3s ease;
}

.faq-item:hover {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 10px 30px rgba(126, 211, 33, 0.1);
}

.faq-question {
    padding: 1.5rem 2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.faq-question:hover {
    color: var(--msm-secondary);
}

.faq-toggle {
    background: linear-gradient(45deg, var(--msm-secondary), var(--msm-cyan));
    color: var(--msm-dark);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 2rem 1.5rem;
    color: #c0c0c0;
    line-height: 1.6;
    display: none;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-item.active .faq-answer {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer */
.footer {
    background: var(--msm-dark);
    padding: 3rem 1rem 2rem;
    border-top: 2px solid var(--msm-secondary);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--msm-cyan);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 20px;
}

.footer-links a:hover {
    color: var(--msm-light);
    background: rgba(80, 227, 194, 0.1);
    transform: translateY(-2px);
}

.footer-text {
    color: var(--msm-gray);
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

/* Mobile Optimizations */
@media (min-width:1600px) {

    /* very large / ultrawide       */
    html {
        font-size: 81.25%;
    }

    /* 13 px                        */
}

@media (min-width:1200px) {

    /* laptops / desktops           */
    html {
        font-size: 87.5%;
    }

    /* 14 px                        */
}

@media (max-width: 768px) {
    html {
        font-size: 93.75%;
    }

    .header-content {
        padding: 1rem;
    }

    .nav-items {
        gap: 1rem;
    }

    .nav-select {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }

    .app-info {
        gap: 1rem;
    }

    .download-stats {
        gap: 1rem;
    }

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

    .monsters-showcase {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .footer-links {
        gap: 1rem;
    }

    .step-content {
        margin-left: 1rem;
    }
}

@media (max-width: 480px) {
    .download-btn {
        padding: 1rem 2rem;
        font-size: 1.1rem;
    }

    .feature-card {
        padding: 1.5rem;
    }

    .monster-card {
        padding: 1.5rem;
    }
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--msm-secondary);
    animation: spin 1s ease-in-out infinite;
}

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