/* KatoFalk Trading Technology - Stylesheet */

/* CSS Variables */
:root {
    --color-primary: #3B82F6;
    --color-primary-dark: #1E40AF;
    --color-primary-light: #60A5FA;
    --color-secondary: #F59E0B;
    --color-dark: #0A1628;
    --color-dark-secondary: #111827;
    --color-gray-900: #1F2937;
    --color-gray-800: #374151;
    --color-gray-600: #6B7280;
    --color-gray-400: #9CA3AF;
    --color-gray-200: #E5E7EB;
    --color-gray-100: #F3F4F6;
    --color-white: #FFFFFF;
    --color-success: #10B981;
    --color-error: #EF4444;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --transition: all 0.3s ease;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-white);
}

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-transform: none;
    letter-spacing: 0;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

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

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

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

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-block {
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

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

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-white);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
}

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

/* Nav Actions & Language Switch */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-telegram {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: rgba(255, 255, 255, 0.85);
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    transition: var(--transition);
}

.nav-telegram svg {
    width: 20px;
    height: 20px;
}

.nav-telegram:hover {
    color: var(--color-white);
    border-color: #29B6F6;
    background: rgba(41, 182, 246, 0.15);
}

.lang-switch {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    font-size: 13px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.85);
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.lang-switch:hover {
    color: var(--color-white);
    border-color: var(--color-primary-light);
    background: rgba(59, 130, 246, 0.15);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-secondary) 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(245, 158, 11, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 40% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 40%);
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 800;
    color: var(--color-white);
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 48px;
    font-weight: 800;
    color: var(--color-white);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 8px;
    display: block;
}

/* Partners Marquee */
.partners {
    background: var(--color-gray-100);
    padding: 24px 0;
    overflow: hidden;
}

.marquee {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.marquee-content {
    display: flex;
    gap: 48px;
    animation: marquee 30s linear infinite;
}

.partner {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-gray-600);
    white-space: nowrap;
    opacity: 0.7;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 800;
    color: var(--color-gray-900);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Solutions Section */
.solutions {
    padding: 100px 0;
    background: var(--color-white);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.solution-card {
    padding: 32px;
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.solution-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(59, 130, 246, 0.05));
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.solution-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.solution-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 12px;
}

.solution-card p {
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--color-gray-100);
}

.features-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.features-text .section-tag,
.features-text .section-title,
.features-text .section-subtitle {
    text-align: left;
    margin-left: 0;
}

.features-list {
    margin: 32px 0;
}

.features-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 16px;
    color: var(--color-gray-800);
}

.features-list svg {
    width: 24px;
    height: 24px;
    color: var(--color-success);
    flex-shrink: 0;
}

.features-visual {
    position: relative;
}

.dashboard-preview {
    background: var(--color-dark);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.dashboard-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: rgba(0, 0, 0, 0.2);
}

.dashboard-dots {
    display: flex;
    gap: 8px;
}

.dashboard-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-gray-600);
}

.dashboard-dots span:first-child { background: #EF4444; }
.dashboard-dots span:nth-child(2) { background: #F59E0B; }
.dashboard-dots span:last-child { background: #10B981; }

.dashboard-title {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.dashboard-content {
    padding: 24px;
}

.dashboard-chart {
    height: 200px;
    margin-bottom: 24px;
}

.dashboard-chart svg {
    width: 100%;
    height: 100%;
}

.dashboard-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.metric {
    text-align: center;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
}

.metric-label {
    display: block;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 8px;
}

.metric-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-white);
}

.metric-value.positive {
    color: var(--color-success);
}

/* Technology Section */
.technology {
    padding: 100px 0;
    background: var(--color-white);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.tech-card {
    padding: 40px 32px;
    background: linear-gradient(135deg, var(--color-dark), var(--color-dark-secondary));
    border-radius: var(--border-radius-lg);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

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

.tech-number {
    font-size: 48px;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.1);
    margin-bottom: 16px;
}

.tech-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}

.tech-card p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

/* CTA Section */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.cta-content {
    text-align: center;
    color: var(--color-white);
}

.cta-content h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: var(--color-gray-100);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-info .section-tag,
.contact-info .section-title {
    text-align: left;
    margin-left: 0;
}

.contact-info p {
    color: var(--color-gray-600);
    margin-bottom: 32px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-gray-800);
}

.contact-item svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
}

.contact-form {
    background: var(--color-white);
    padding: 40px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    font-family: var(--font-family);
    font-size: 16px;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    transition: var(--transition);
    background: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: 80px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 64px;
    margin-bottom: 64px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    max-width: 280px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

.footer-column a:hover {
    color: var(--color-white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-white);
}

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

.social-links svg {
    width: 18px;
    height: 18px;
}

/* Responsive */
@media (max-width: 1024px) {
    .features-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .features-text {
        order: 1;
    }

    .features-visual {
        order: 2;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--color-dark);
        flex-direction: column;
        padding: 32px;
        gap: 24px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-actions .btn {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-stats {
        gap: 32px;
    }

    .stat-number {
        font-size: 36px;
    }

    .solutions-grid {
        grid-template-columns: 1fr;
    }

    .dashboard-metrics {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

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

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

    .contact-form {
        padding: 24px;
    }
}