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

:root {
    --primary-color: #1DB954;
    --secondary-color: #191414;
    --accent-color: #1ed760;
    --text-color: #191414;
    --text-light: #535353;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #1DB954 0%, #1ed760 100%);
    --gradient-dark: linear-gradient(135deg, #191414 0%, #2d2d2d 100%);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    font-size: 16px;
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Navigation */
.navbar {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary-color);
    letter-spacing: -1px;
    display: flex;
    align-items: center;
}

.logo img {
    height: 32px;
    width: auto;
    display: block;
}

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

.nav-menu li a {
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
    font-size: 0.95rem;
}

.nav-menu li a.active {
    color: var(--primary-color);
}

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

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 3px 0;
    border-radius: 2px;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: var(--gradient);
    color: var(--white);
    padding: 100px 0 80px;
    text-align: center;
}

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

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

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

.btn-large {
    padding: 18px 48px;
    font-size: 1.1rem;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1.5rem;
}

.section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 3rem;
}

.section-text {
    text-align: center;
    margin-top: 2rem;
    font-size: 1.1rem;
}

.bg-light {
    background-color: var(--bg-light);
}

.bg-gradient {
    background: var(--gradient);
    color: var(--white);
}

.bg-gradient .section-title {
    color: var(--white);
}

/* Content Block */
.content-block {
    max-width: 900px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
}

.content-block.center {
    text-align: center;
}

.content-block h2 {
    margin-bottom: 1.5rem;
}

.content-block h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

/* Links */
.inline-link {
    color: var(--primary-color);
    font-weight: 600;
    transition: opacity 0.3s;
}

.inline-link.white {
    color: var(--white);
    text-decoration: underline;
}

/* Feature Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.feature-card h3 {
    color: var(--text-color);
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-light);
    margin-bottom: 0;
}

/* List Box */
.list-box {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
}

.list-box h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
}

/* Feature List */
.feature-list {
    list-style: none;
    padding-left: 0;
    margin: 1.5rem 0;
}

.feature-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: 1.05rem;
}

.feature-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Steps Grid */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.step-card {
    text-align: center;
    padding: 2rem 1rem;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}

.step-card h3 {
    margin-bottom: 0.75rem;
}

.step-card p {
    color: var(--text-light);
    margin-bottom: 0;
}

/* Checklist */
.checklist {
    max-width: 600px;
    margin: 2rem auto;
}

.check-item {
    background: rgba(255, 255, 255, 0.15);
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    font-size: 1.1rem;
    backdrop-filter: blur(10px);
}

.white {
    color: var(--white);
}

.cta-text {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 2rem 0;
}

/* Footer */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer-col p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s;
}

.footer-link {
    color: var(--primary-color);
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-menu.active {
        max-height: 500px;
    }

    .nav-menu li {
        width: 100%;
        text-align: center;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--bg-light);
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

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

    .btn {
        width: 100%;
        max-width: 300px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

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

    .section {
        padding: 50px 0;
    }

    .features-grid,
    .steps-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 60px 0 50px;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .section {
        padding: 40px 0;
    }
}

/* Performance Optimizations */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}