/* Base Reset & Variables */
:root {
    --bg-color: #0F1115;
    --card-bg: #1A1D24;
    --text-main: #FFFFFF;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --secondary: #8b5cf6;
    --success: #10b981;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    background-image:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.1), transparent),
        radial-gradient(ellipse 50% 30% at 20% 80%, rgba(59, 130, 246, 0.08), transparent);
    background-attachment: fixed;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s var(--transition);
}

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1,
h2,
h3 {
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-light), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: 16px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s var(--transition);
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn.lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    color: white;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary::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;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.6);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.15);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: all 0.3s ease;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--accent-light), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 30px rgba(59, 130, 246, 0.3);
}

.nav-list {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.brand-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1.25rem 0.625rem 0.625rem;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.brand-logo-sm {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

.brand-badge span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-light);
}

.hero-title {
    font-size: 4.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.05;
    letter-spacing: -0.03em;
    background: linear-gradient(180deg, #FFFFFF 0%, rgba(255, 255, 255, 0.8) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 60px rgba(59, 130, 246, 0.2);
}

.hero-desc {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
    max-width: 540px;
}

.hero-btns {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.users-preview {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatars span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 2px solid var(--bg-color);
    margin-left: -12px;
    font-size: 1.2rem;
}

.avatars span:first-child {
    margin-left: 0;
}

.users-preview p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
    height: 700px;
    /* Ensure space for the floating element */
}

.phone-mockup {
    width: 320px;
    height: 650px;
    background: #000;
    border-radius: 48px;
    padding: 12px;
    position: relative;
    z-index: 10;
    box-shadow:
        0 50px 100px -20px rgba(0, 0, 0, 0.6),
        0 0 0 2px rgba(50, 50, 50, 0.5),
        inset 0 0 0 2px rgba(255, 255, 255, 0.1);
    transform: rotateY(-10deg) rotateX(5deg);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    animation: floatPhone 6s ease-in-out infinite;
    border: 4px solid #1a1a1a;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 25px;
    background: #000;
    border-bottom-left-radius: 16px;
    border-bottom-right-radius: 16px;
    z-index: 20;
}

@keyframes floatPhone {

    0%,
    100% {
        transform: rotateY(-10deg) rotateX(5deg) translateY(0);
    }

    50% {
        transform: rotateY(-10deg) rotateX(5deg) translateY(-20px);
    }
}

.phone-mockup:hover {
    transform: rotateY(0) rotateX(0) scale(1.02);
    animation: none;
    box-shadow: 0 60px 120px -20px rgba(0, 0, 0, 0.7);
}

.screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #0F1115 0%, #1a1a2e 100%);
    border-radius: 36px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* App Icon Animation Container */
.app-center-display {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.app-icon-wrapper {
    position: relative;
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
}

.main-app-icon {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    z-index: 10;
    position: relative;
}

.ripple-effect {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    border-radius: 24px;
    border: 2px solid var(--accent);
    opacity: 0;
    animation: rippleSquare 3s infinite;
}

.ripple-effect:nth-child(2) {
    animation-delay: 1s;
}

.ripple-effect:nth-child(3) {
    animation-delay: 2s;
}

@keyframes rippleSquare {
    0% {
        width: 100px;
        height: 100px;
        opacity: 0.8;
        border-color: var(--accent);
    }

    100% {
        width: 250px;
        height: 250px;
        opacity: 0;
        border-color: transparent;
    }
}

.scanning-line {
    position: absolute;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    top: 0;
    left: 0;
    animation: scanDown 3s linear infinite;
    opacity: 0.5;
}

@keyframes scanDown {
    0% {
        top: 0%;
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        top: 100%;
        opacity: 0;
    }
}

.app-name-display {
    margin-top: 2rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    letter-spacing: 1px;
}

.app-ui {
    height: 100%;
    display: flex;
    flex-direction: column;
    background: linear-gradient(to bottom, #1a1a2e, #0F1115);
}

.app-header {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.app-header-logo {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.app-title {
    font-weight: 700;
    font-size: 1.1rem;
}

.app-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
}

.send-circle {
    width: 110px;
    height: 110px;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    box-shadow:
        0 0 60px rgba(59, 130, 246, 0.5),
        0 0 100px rgba(139, 92, 246, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.2);
    position: relative;
}

.ripple {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--accent);
    animation: ripple 2s infinite;
}

@keyframes ripple {
    0% {
        transform: scale(1);
        opacity: 0.6;
    }

    100% {
        transform: scale(1.6);
        opacity: 0;
    }
}

.file-card.glass-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(12px);
    padding: 1rem;
    border-radius: 16px;
    width: 85%;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateY(20px);
    opacity: 0;
    animation: slideUp 0.6s ease forwards 0.5s;
}

.check-icon {
    margin-left: auto;
    color: var(--success);
    font-weight: bold;
}

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

/* Blobs */
.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 1;
    opacity: 0.4;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--accent);
    top: -10%;
    right: -20%;
    animation: move 15s infinite alternate;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary);
    bottom: -10%;
    left: -10%;
    animation: move 12s infinite alternate-reverse;
}

.blob-3 {
    width: 200px;
    height: 200px;
    background: #ec4899;
    top: 40%;
    right: 10%;
    animation: move 20s infinite linear;
}

@keyframes move {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(40px, -40px);
    }
}

/* Features */
.features-grid {
    margin-top: 4rem;
}

.feature-card {
    background: linear-gradient(145deg, rgba(26, 29, 36, 0.8), rgba(26, 29, 36, 0.4));
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 24px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-card);
}

.feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-12px);
    box-shadow:
        0 30px 60px -20px rgba(0, 0, 0, 0.6),
        0 0 40px rgba(59, 130, 246, 0.2);
    background: linear-gradient(145deg, rgba(26, 29, 36, 0.95), rgba(26, 29, 36, 0.6));
}

.icon-box {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.15));
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 18px;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.2);
    transition: all 0.3s ease;
}

.feature-card:hover .icon-box {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(180deg, #FFFFFF 0%, rgba(255, 255, 255, 0.7) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

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

/* Video Section */
.video-section {
    padding: 8rem 0;
    position: relative;
    overflow: hidden;
}

.video-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1200px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08), transparent 60%);
    pointer-events: none;
}

.video-wrapper {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.video-container {
    position: relative;
    width: 100%;
    border-radius: 24px;
    overflow: hidden;
    box-shadow:
        0 40px 80px -20px rgba(0, 0, 0, 0.6),
        0 0 60px rgba(59, 130, 246, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    background: rgba(15, 17, 21, 0.8);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.video-container::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--accent), var(--secondary), var(--accent));
    border-radius: 26px;
    z-index: -1;
    opacity: 0.5;
    animation: borderGlow 4s ease-in-out infinite;
}

@keyframes borderGlow {

    0%,
    100% {
        opacity: 0.3;
    }

    50% {
        opacity: 0.6;
    }
}

.video-container:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow:
        0 60px 100px -20px rgba(0, 0, 0, 0.7),
        0 0 80px rgba(59, 130, 246, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.video-container iframe {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    border: none;
}

/* Features */
.features {
    padding: 6rem 0;
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05), transparent 70%);
    pointer-events: none;
}

.features-grid {
    margin-top: 4rem;
    position: relative;
    z-index: 1;
}

/* Steps Section */
.steps {
    padding: 6rem 0;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.step-item {
    text-align: center;
    padding: 2.5rem;
    background: linear-gradient(145deg, rgba(26, 29, 36, 0.6), rgba(26, 29, 36, 0.3));
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.step-item:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow:
        0 20px 40px -20px rgba(0, 0, 0, 0.5),
        0 0 30px rgba(59, 130, 246, 0.15);
}

.step-number {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1.5rem;
    line-height: 1;
    opacity: 0.3;
    transition: opacity 0.3s ease;
}

.step-item:hover .step-number {
    opacity: 1;
}

.step-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.step-item p {
    color: var(--text-muted);
    line-height: 1.7;
}

/* CTA Section */
.cta {
    padding: 8rem 0;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    z-index: 0;
}

.cta-container {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(180deg, #FFFFFF 0%, rgba(255, 255, 255, 0.8) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.cta-desc {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.cta-actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-white {
    background: #FFFFFF;
    color: var(--bg-color);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.3);
    background: #F8F8F8;
}

.btn-outline-white {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--glass-border);
    background: rgba(15, 17, 21, 0.5);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand .logo {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.developer-credit {
    margin-top: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.developer-credit a {
    color: var(--accent-light);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.developer-credit a:hover {
    color: var(--secondary);
    text-shadow: 0 0 20px rgba(59, 130, 246, 0.5);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

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

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

/* Card Base */
.card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
}

/* Nav Link */
.nav-link {
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.95rem;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--secondary));
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--text-main);
}

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

/* Status Text */
.status-text {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* File Info */
.file-info {
    flex: 1;
}

.file-name {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.file-size {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.file-icon {
    font-size: 1.5rem;
}

/* Header Scrolled State */
.header.scrolled {
    background: rgba(15, 17, 21, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* Responsive adjustments */
@media (max-width: 1200px) {
    .hero-title {
        font-size: 3.5rem;
    }

    .phone-mockup {
        width: 300px;
        height: 600px;
    }

    .container {
        padding: 0 1.5rem;
    }
}

@media (max-width: 968px) {
    .hero-title {
        font-size: 2.75rem;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-btns {
        justify-content: center;
        flex-wrap: wrap;
    }

    .badge {
        margin: 0 auto 1.5rem;
    }

    .users-preview {
        justify-content: center;
    }

    .phone-mockup {
        margin: 2rem auto 0;
        transform: rotateY(0) rotateX(0);
    }

    .phone-mockup:hover {
        transform: none;
    }

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

    .cta-title {
        font-size: 2.25rem;
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
    }

    .nav-list {
        gap: 1.5rem;
    }

    .header-container {
        padding: 0 1rem;
    }

    .nav-list .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: 8rem;
        padding-bottom: 4rem;
    }

    .video-section {
        padding: 5rem 0;
    }

    .video-wrapper {
        max-width: 100%;
    }

    .video-container {
        border-radius: 16px;
    }

    .video-container::before {
        border-radius: 18px;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-desc {
        font-size: 1rem;
        max-width: 100%;
    }

    .btn.lg {
        padding: 0.875rem 1.75rem;
        font-size: 1rem;
    }

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

    .cta-title {
        font-size: 1.875rem;
    }

    .cta-desc {
        font-size: 1rem;
    }

    .step-number {
        font-size: 2.5rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }

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

    .cta-actions {
        flex-direction: column;
        width: 100%;
    }

    .cta-actions .btn {
        width: 100%;
    }

    .nav {
        display: none;
    }

    .header {
        padding: 1rem 0;
    }

    .brand-badge {
        padding: 0.5rem 1rem 0.5rem 0.5rem;
    }

    .phone-mockup {
        width: 260px;
        height: 520px;
    }

    .send-circle {
        width: 90px;
        height: 90px;
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.875rem;
    }

    .hero-title br {
        display: none;
    }

    .hero-desc {
        font-size: 0.9rem;
    }

    .hero-btns {
        flex-direction: column;
        width: 100%;
    }

    .hero-btns .btn {
        width: 100%;
        justify-content: center;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .cta-title {
        font-size: 1.5rem;
    }

    .cta-desc {
        font-size: 0.9rem;
    }

    .container {
        padding: 0 1rem;
    }

    .section-header {
        margin-bottom: 3rem;
    }

    .section-desc {
        font-size: 1rem;
    }

    .feature-card,
    .step-item {
        padding: 2rem 1.5rem;
    }

    .icon-box {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }

    .step-item h3 {
        font-size: 1.25rem;
    }

    .step-item p {
        font-size: 0.9rem;
    }

    .phone-mockup {
        width: 220px;
        height: 440px;
        padding: 10px;
    }

    .screen {
        border-radius: 28px;
    }

    .app-header {
        padding: 1rem;
        margin-top: 1.5rem;
    }

    .app-header-logo {
        width: 40px;
        height: 40px;
    }

    .app-title {
        font-size: 1rem;
    }

    .send-circle {
        width: 80px;
        height: 80px;
        font-size: 1.75rem;
    }

    .file-card.glass-card {
        width: 90%;
        padding: 0.875rem;
    }

    .file-name {
        font-size: 0.85rem;
    }

    .file-size {
        font-size: 0.75rem;
    }

    .users-preview {
        flex-direction: column;
        gap: 0.75rem;
    }

    .avatars {
        margin-left: 0;
    }

    .avatars span {
        margin-left: -8px;
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }

    .avatars span:first-child {
        margin-left: 0;
    }

    .users-preview p {
        font-size: 0.8rem;
    }

    .footer {
        padding: 2rem 0;
    }

    .footer-brand .logo {
        font-size: 1.125rem;
    }

    .footer-brand p {
        font-size: 0.8rem;
    }

    .footer-links a {
        font-size: 0.8rem;
    }
}

@media (max-width: 360px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }

    .btn.lg {
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }

    .logo {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 1.25rem;
    }

    .feature-card h3,
    .step-item h3 {
        font-size: 1.125rem;
    }

    .feature-card p,
    .step-item p {
        font-size: 0.85rem;
    }

    .phone-mockup {
        width: 180px;
        height: 360px;
    }

    .send-circle {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
}

/* Gallery Section */
.gallery-section {
    padding: 8rem 0;
    position: relative;
    overflow: hidden;
}

.gallery-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1200px;
    height: 800px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.08), transparent 60%);
    pointer-events: none;
}

.gallery-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.gallery-main {
    margin-bottom: 3rem;
}

.main-image-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    border-radius: 24px;
    overflow: hidden;
    box-shadow:
        0 40px 80px -20px rgba(0, 0, 0, 0.6),
        0 0 60px rgba(139, 92, 246, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    background: rgba(15, 17, 21, 0.8);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    animation: galleryGlow 4s ease-in-out infinite, imageFloat 6s ease-in-out infinite;
}

@keyframes imageFloat {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    25% {
        transform: translateY(-10px) rotate(1deg);
    }
    50% {
        transform: translateY(-5px) rotate(-0.5deg);
    }
    75% {
        transform: translateY(-15px) rotate(0.5deg);
    }
}

@keyframes galleryGlow {
    0%, 100% {
        box-shadow:
            0 40px 80px -20px rgba(0, 0, 0, 0.6),
            0 0 60px rgba(139, 92, 246, 0.15),
            inset 0 1px 0 rgba(255, 255, 255, 0.1);
    }
    50% {
        box-shadow:
            0 50px 100px -20px rgba(0, 0, 0, 0.7),
            0 0 80px rgba(139, 92, 246, 0.25),
            inset 0 1px 0 rgba(255, 255, 255, 0.15);
    }
}

.main-image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-image:hover {
    transform: scale(1.02);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.3) 0%,
        transparent 20%,
        transparent 80%,
        rgba(0, 0, 0, 0.3) 100%
    );
    pointer-events: none;
}

.image-counter {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 0.75rem 1.25rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.gallery-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    margin-top: 2rem;
}

.gallery-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(59, 130, 246, 0.2));
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.gallery-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.3), rgba(59, 130, 246, 0.3));
    border-color: rgba(255, 255, 255, 0.2);
}

.gallery-btn:active {
    transform: translateY(0);
}

.play-btn {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.play-btn:hover {
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.6);
}

.play-btn.playing {
    background: linear-gradient(135deg, var(--secondary), var(--accent));
}

.gallery-thumbnails {
    margin-top: 2rem;
}

.thumbnail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

.thumbnail-item {
    position: relative;
    aspect-ratio: 16/9;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    background: rgba(15, 17, 21, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.thumbnail-item:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    border-color: rgba(139, 92, 246, 0.5);
}

.thumbnail-item.active {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
    transform: scale(1.05);
}

.thumbnail-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.thumbnail-item:hover img {
    transform: scale(1.1);
}

.thumbnail-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.2) 0%,
        transparent 30%,
        transparent 70%,
        rgba(0, 0, 0, 0.2) 100%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
}

.thumbnail-item:hover .thumbnail-overlay {
    opacity: 1;
}

.thumbnail-item.active .thumbnail-overlay {
    background: linear-gradient(
        to bottom,
        rgba(59, 130, 246, 0.3) 0%,
        transparent 30%,
        transparent 70%,
        rgba(59, 130, 246, 0.3) 100%
    );
    opacity: 1;
}

.screenshot-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.7));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.thumbnail-item:hover .screenshot-info {
    transform: translateY(0);
}

.screenshot-info h4 {
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--accent-light);
}

.screenshot-info p {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin: 0;
}

/* Security Section Styles */
.security-section {
    padding: 8rem 0;
    position: relative;
    overflow: hidden;
}

.security-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1200px;
    height: 800px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.08), transparent 60%);
    pointer-events: none;
}

.security-content {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.security-notice {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    background: linear-gradient(145deg, rgba(26, 29, 36, 0.8), rgba(26, 29, 36, 0.4));
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-card);
}

.notice-icon {
    font-size: 3rem;
    min-width: 60px;
    text-align: center;
}

.notice-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent-light);
}

.notice-content p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-main);
}

.security-steps {
    margin-bottom: 3rem;
}

.security-steps h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--text-main);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.step-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
    background: linear-gradient(145deg, rgba(26, 29, 36, 0.6), rgba(26, 29, 36, 0.3));
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.step-card:hover {
    transform: translateY(-4px);
    border-color: var(--success);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--success), #059669);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.8rem;
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
    animation: pulse 2s infinite;
}

.step-card:hover .step-number {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
    }
    50% {
        box-shadow: 0 4px 15px rgba(16, 185, 129, 0.6);
    }
}

.step-content h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.step-content p {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.security-features h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--text-main);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: linear-gradient(145deg, rgba(26, 29, 36, 0.6), rgba(26, 29, 36, 0.3));
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-item:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 2rem;
    min-width: 40px;
    text-align: center;
}

.feature-text h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.feature-text p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Gallery Responsive Design */
@media (max-width: 768px) {
    .gallery-section {
        padding: 5rem 0;
    }
    
    .gallery-controls {
        gap: 1rem;
    }
    
    .gallery-btn {
        width: 48px;
        height: 48px;
    }
    
    .play-btn {
        width: 56px;
        height: 56px;
    }
    
    .thumbnail-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        gap: 0.75rem;
    }
    
    .image-counter {
        top: 1rem;
        right: 1rem;
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .gallery-section {
        padding: 3rem 0;
    }
    
    .main-image-container {
        border-radius: 16px;
    }
    
    .thumbnail-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }
    
    .thumbnail-item {
        border-radius: 8px;
    }
    
    .gallery-btn {
        width: 40px;
        height: 40px;
    }
    
    .play-btn {
        width: 48px;
        height: 48px;
    }
    
    .gallery-btn svg {
        width: 20px;
        height: 20px;
    }
    
    .security-section {
        padding: 5rem 0;
    }
    
    .security-notice {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .steps-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}