:root {
    --primary: #06b0ec;
    --primary-hover: #0597cc;
    --secondary: #ec4899;
    --dark-bg: #0f172a;
    --dark-card: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --gradient-main: linear-gradient(135deg, #06b0ec 0%, #ec4899 100%);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);

    --font-heading: 'Assistant', sans-serif;
    --font-body: 'Assistant', sans-serif;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--dark-bg);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: #fff;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 20px 0;
    backdrop-filter: blur(10px);
    background: rgba(15, 23, 42, 0.8);
    z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon-img {
    color: var(--primary);
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: 1.50rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: #fff;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

.main-nav a:not(.btn) {
    color: var(--text-muted);
}

.main-nav a:not(.btn):hover {
    color: #fff;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #fff;
}

.btn-secondary:hover {
    color: var(--primary);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-outline {
    border: 1px solid var(--glass-border);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.glow {
    position: relative;
    overflow: hidden;
}

.glow::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 60%);
    opacity: 0;
    transform: scale(0.5);
    transition: opacity 0.5s, transform 0.5s;
}

.glow:hover::after {
    opacity: 1;
    transform: scale(1);
}

/* Hero Section */
.hero-section {
    padding: 160px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero-text {
    flex: 1;
    max-width: 600px;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 24px;
}

.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
}

/* Phone Mockup */
.mockup-phone {
    width: 300px;
    height: 600px;
    background: #000;
    border-radius: 40px;
    border: 8px solid #333;
    padding: 10px;
    position: relative;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.screen {
    background: #111;
    height: 100%;
    border-radius: 30px;
    overflow: hidden;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    font-size: 0.9rem;
}

.chat-message {
    padding: 12px 16px;
    border-radius: 16px;
    max-width: 80%;
    animation: slideIn 0.5s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

.chat-message:nth-child(1) {
    animation-delay: 0.5s;
}

.chat-message:nth-child(2) {
    animation-delay: 1.5s;
}

.chat-message:nth-child(3) {
    animation-delay: 2.5s;
}

.chat-message:nth-child(4) {
    animation-delay: 3.5s;
}

.incoming {
    background: #333;
    color: #fff;
    align-self: flex-start;
    border-bottom-right-radius: 4px;
}

.outgoing {
    background: var(--primary);
    color: #fff;
    align-self: flex-end;
    border-bottom-left-radius: 4px;
}

.chat-icon {
    width: 16px;
    height: 16px;
    vertical-align: middle;
    margin: 0 4px;
}

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

.hero-bg-glow {
    position: absolute;
    top: 0;
    right: 0;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* Features */
.features-section {
    padding: 100px 0;
    background: #0f172a;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 30px;
    border-radius: 16px;
    transition: transform 0.3s ease;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
}

.feature-card .icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-muted);
}

/* Footer */
.site-footer {
    padding: 80px 0 20px;
    background: #020617;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-col h4 {
    margin-bottom: 20px;
    color: #fff;
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    margin-bottom: 10px;
}

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

.copyright {
    text-align: center;
    color: var(--text-muted);
    padding-top: 20px;
    border-top: 1px solid #1e293b;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hero-cta {
        justify-content: center;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}