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

:root {
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-light: #60a5fa;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-dark: #0f172a;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(180deg, #f0f9ff 0%, #f8fafc 50%, #ffffff 100%);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    min-width: 320px;
}

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

img {
    max-width: 100%;
    height: auto;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .container { padding: 0 1.5rem; }
}

@media (min-width: 1024px) {
    .container { padding: 0 2rem; }
}

/* Navigation */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    width: 100%;
    border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(12px);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo img {
    height: 32px;
    width: auto;
    border-radius: 0.375rem;
}

.nav-logo span {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-dark);
}

.nav-links {
    display: none;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
        gap: 2rem;
    }
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary);
}

.btn-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 36px;
    padding: 0 1rem;
    border-radius: 0.5rem;
    background: var(--primary);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.btn-sm:hover {
    background: var(--primary-hover);
    transform: scale(1.02);
}

.btn-sm:active {
    transform: scale(0.98);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 3rem 0 5rem;
    overflow: hidden;
}

@media (min-width: 1024px) {
    .hero { padding: 6rem 0 8rem; }
}

.hero::before,
.hero::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    z-index: -1;
}

.hero::before {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    max-width: 100vw;
    height: 600px;
    background: rgba(59, 130, 246, 0.05);
    filter: blur(100px);
}

@media (max-width: 1023px) {
    .hero::before {
        width: 100vw;
    }
}

.hero::after {
    bottom: 0;
    right: 0;
    width: 800px;
    max-width: 100vw;
    height: 600px;
    background: rgba(96, 165, 250, 0.05);
    filter: blur(120px);
}

@media (max-width: 1023px) {
    .hero::after {
        width: 100vw;
        right: auto;
        left: 0;
    }
}

.hero-inner {
    display: grid;
    gap: 3rem;
}

@media (min-width: 1024px) {
    .hero-inner {
        grid-template-columns: 1fr 1fr;
        gap: 4rem;
        align-items: center;
    }
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
}

@media (min-width: 1024px) {
    .hero-content { text-align: left; }
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    background: #eff6ff;
    border: 1px solid #dbeafe;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    width: fit-content;
}

.badge::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text-dark);
}

@media (min-width: 640px) {
    .hero-title { font-size: 3rem; }
}

@media (min-width: 1024px) {
    .hero-title { font-size: 3.75rem; }
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-muted);
    line-height: 1.7;
}

@media (min-width: 1024px) {
    .hero-desc { max-width: 36rem; }
}

.btn-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 640px) {
    .btn-group {
        flex-direction: row;
        justify-content: center;
    }
}

@media (min-width: 1024px) {
    .btn-group { justify-content: flex-start; }
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 48px;
    padding: 0 2rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: white;
    color: var(--text-main);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-light);
    border-color: #cbd5e1;
}

.meta-info {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.hero-image {
    position: relative;
}

.hero-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(96, 165, 250, 0.2));
    filter: blur(60px);
    border-radius: 50%;
    opacity: 0.6;
    z-index: -1;
}

.hero-image img {
    width: 100%;
    filter: drop-shadow(0 25px 50px rgba(59, 130, 246, 0.25));
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: var(--bg-white);
    position: relative;
    overflow: hidden;
}

.features::before {
    content: '';
    position: absolute;
    top: 25%;
    right: -16rem;
    width: 600px;
    max-width: 100vw;
    height: 600px;
    background: rgba(59, 130, 246, 0.08);
    border-radius: 50%;
    filter: blur(100px);
    pointer-events: none;
}

@media (max-width: 767px) {
    .features::before {
        right: -10rem;
    }
}

.features-header {
    text-align: center;
    max-width: 48rem;
    margin: 0 auto 4rem;
}

.features-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

@media (min-width: 768px) {
    .features-title { font-size: 2.5rem; }
}

.features-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 64rem;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .features-grid { grid-template-columns: repeat(3, 1fr); }
}

.feature-card {
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: 1rem;
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 0.75rem;
    background: #eff6ff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.feature-card:hover .feature-icon {
    background: var(--primary);
}

.feature-card:hover .feature-icon span {
    color: white;
}

.feature-icon span {
    font-size: 1.5rem;
    color: var(--primary);
}

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

/* Download Section */
.download {
    padding: 5rem 0;
    background: var(--bg-light);
}

.download-card {
    max-width: 56rem;
    margin: 0 auto;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: 1.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.download-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .download-title { font-size: 3rem; }
}

.download-desc {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.download-btn-lg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    background: var(--primary);
    color: white;
    border-radius: 1rem;
    font-size: 1.25rem;
    font-weight: 700;
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.3);
    transition: all 0.2s;
    position: relative;
}

.download-btn-lg:hover {
    background: var(--primary-hover);
    box-shadow: 0 25px 50px rgba(59, 130, 246, 0.4);
    transform: scale(1.02);
}

.download-badge {
    position: absolute;
    top: -12px;
    right: -12px;
    background: #ef4444;
    color: white;
    font-size: 0.625rem;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    animation: bounce 1s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.download-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 3rem;
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 640px) {
    .download-features { grid-template-columns: repeat(3, 1fr); }
}

.download-feature {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.download-notice {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.download-notice a {
    color: var(--primary);
}

.download-notice a:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--bg-white);
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer-brand {
    grid-column: span 2;
}

@media (min-width: 768px) {
    .footer-brand { grid-column: span 1; }
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-brand .logo img {
    height: 24px;
}

.footer-brand p {
    font-size: 0.875rem;
    color: var(--text-muted);
    max-width: 16rem;
    margin-bottom: 1.5rem;
}

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

.footer-social a {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.footer-social a:hover {
    background: var(--primary);
    color: white;
}

.footer h4 {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

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

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

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: color 0.2s;
}

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

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--text-muted);
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

/* Utilities */
.text-primary { color: var(--primary); }
.text-green { color: #22c55e; }
.text-center { text-align: center; }
.font-bold { font-weight: 700; }
.text-highlight {
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #ec4899, #3b82f6);
    background-size: 300% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-flow 4s ease infinite;
}

@keyframes gradient-flow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.strike-text {
    position: relative;
    text-decoration: none;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #ec4899, #3b82f6);
    background-size: 300% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-flow 4s ease infinite;
    display: inline-block;
    overflow: hidden;
    vertical-align: baseline;
}

.strike-text::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 6px;
    background: rgba(239, 68, 68, 1);
    transform: rotate(35deg);
    transform-origin: center;
}