/* Modern Reset & Variables */
:root {
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --accent: #f59e0b;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --border-light: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 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-glow: 0 0 20px rgba(37, 99, 235, 0.15);
    
    --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-serif: 'Playfair Display', serif;
}

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

body {
    font-family: var(--font-sans);
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-main);
}

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

/* Base Layout */
.landing-wrapper {
    overflow-x: hidden;
}

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem;
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 800px;
    animation: fadeInUp 1s ease-out;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    margin-bottom: 2rem;
    text-transform: uppercase;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero-title .highlight {
    color: var(--primary);
    font-family: var(--font-serif);
    font-style: italic;
    background: linear-gradient(120deg, var(--primary), #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--text-muted);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.125rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

/* Background Effects */
.hero-bg-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
    pointer-events: none;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.orb-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: rgba(59, 130, 246, 0.3);
    animation: float 10s ease-in-out infinite alternate;
}

.orb-2 {
    bottom: -10%;
    right: -10%;
    width: 40vw;
    height: 40vw;
    background: rgba(96, 165, 250, 0.2);
    animation: float 12s ease-in-out infinite alternate-reverse;
}

/* Services Section */
.services-section {
    padding: 8rem 2rem;
    background-color: white;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.service-card {
    background: var(--bg-card);
    padding: 3rem 2rem;
    border-radius: 24px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(37, 99, 235, 0.2);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: #eff6ff;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    color: var(--primary);
    transition: all 0.3s ease;
}

.service-card:hover .card-icon {
    background: var(--primary);
    color: white;
}

.card-icon svg {
    width: 40px;
    height: 40px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

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

/* Contact Section */
.contact-section {
    padding: 8rem 2rem;
    background: var(--bg-main);
    text-align: center;
}

.contact-container {
    max-width: 800px;
    margin: 0 auto;
}

.contact-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 1rem;
}

.contact-desc {
    color: var(--text-muted);
    margin-bottom: 4rem;
    font-size: 1.125rem;
}

.contact-card {
    background: white;
    padding: 4rem 2rem;
    border-radius: 32px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, var(--primary), #60a5fa);
}

.telegram-icon {
    width: 80px;
    height: 80px;
    background: #0088cc;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    box-shadow: 0 10px 20px rgba(0, 136, 204, 0.3);
}

.telegram-icon svg {
    width: 40px;
    height: 40px;
    margin-right: 4px; /* Optical alignment */
}

.contact-info {
    margin-bottom: 2.5rem;
}

.contact-label {
    display: block;
    color: var(--text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.telegram-link {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.telegram-link:hover {
    color: var(--primary);
}

.at-symbol {
    color: #0088cc;
}

.contact-subtext {
    color: var(--text-muted);
    font-size: 1rem;
}

.btn-telegram {
    background: #0088cc;
    color: white;
    padding: 1rem 3rem;
    font-size: 1.125rem;
}

.btn-telegram:hover {
    background: #0077b3;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 136, 204, 0.3);
}

/* Footer */
.landing-footer {
    text-align: center;
    padding: 3rem 2rem;
    background: white;
    border-top: 1px solid var(--border-light);
    color: var(--text-muted);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(5%, 5%) rotate(5deg); }
}

/* Responsive */
@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .telegram-link {
        font-size: 2.5rem;
    }
}
.video-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; margin-top: 1.5rem; border-radius: 12px; box-shadow: var(--shadow-md); } .video-container iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border-radius: 12px; border: none; }


/* Trust & Tech Section */
.text-center { text-align: center; }
.bg-light { background-color: #f8fafc; }
.trust-section { padding: 6rem 2rem; background: linear-gradient(to bottom, #ffffff, #f8fafc); }
.trust-desc { font-size: 1.25rem; line-height: 1.8; color: var(--text-muted); max-width: 800px; margin: 0 auto; }

/* Features Highlight */
.features-highlight { padding: 4rem 2rem 8rem; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.feature-box { padding: 2.5rem; background: white; border-radius: 20px; box-shadow: var(--shadow-md); border-top: 4px solid var(--primary); }
.feature-box h3 { font-size: 1.5rem; margin-bottom: 1rem; color: var(--text-main); }
.feature-box p { color: var(--text-muted); line-height: 1.6; }

/* Solution Detail (Large Video) */
.solution-detail { padding: 8rem 0; }
.detail-header { margin-bottom: 4rem; padding: 0 2rem; }
.detail-header p { font-size: 1.125rem; color: var(--text-muted); max-width: 600px; margin: 0 auto; }
.large-video-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: 24px; box-shadow: var(--shadow-lg); max-width: 1000px; margin: 0 auto; }
.large-video-container iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; }

/* Promo Badge */
.promo-badge { display: inline-block; background: #ef4444; color: white; padding: 0.5rem 1.5rem; border-radius: 50px; font-weight: bold; margin-bottom: 1.5rem; animation: pulse 2s infinite; }
@keyframes pulse { 0% { transform: scale(1); } 50% { transform: scale(1.05); } 100% { transform: scale(1); } }