:root {
    --primary: #4361ee;
    --primary-light: #a5b4fc;
    --secondary: #f72585;
    --secondary-light: #ffb7d5;
    --dark: #1e293b;
    --light: #f8fafc;
    --accent: #00bbf9;
    --accent-light: #a5e1ff;
    --success: #06d6a0;
    --warning: #ffd166;
    --terminal: #0d9488;
    --terminal-bg: rgba(240, 253, 250, 0.95);
    --card-bg: rgba(255, 255, 255, 0.9);
    --shadow: rgba(99, 102, 241, 0.1);
    --shadow-hover: rgba(99, 102, 241, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

body {
    background: linear-gradient(135deg, #f0f9ff 0%, #fef2f2 50%, #f0fdf4 100%);
    color: var(--dark);
    overflow-x: hidden;
    line-height: 1.6;
    min-height: 100vh;
}

/* Анимированный фон с волнами */
.wave-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.6;
    background: 
        radial-gradient(circle at 20% 80%, rgba(67, 97, 238, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(247, 37, 133, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 187, 249, 0.05) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, 50px) rotate(120deg); }
    66% { transform: translate(-20px, 80px) rotate(240deg); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.98));
    backdrop-filter: blur(20px);
    padding: 60px 0 40px;
    text-align: center;
    border-bottom: 1px solid rgba(67, 97, 238, 0.1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 30px var(--shadow);
}

header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    animation: gradientMove 3s ease infinite;
}

@keyframes gradientMove {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

h1 {
    font-size: 3.8rem;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 900;
    letter-spacing: -0.5px;
    line-height: 1.1;
    text-shadow: 0 4px 12px rgba(67, 97, 238, 0.15);
}

.subtitle {
    font-size: 1.4rem;
    color: var(--dark);
    max-width: 800px;
    margin: 0 auto 32px;
    font-weight: 400;
    opacity: 0.85;
}

.terminal-box {
    background: var(--terminal-bg);
    border: 2px solid var(--terminal);
    border-radius: 20px;
    padding: 28px;
    margin: 40px auto;
    max-width: 900px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    position: relative;
    box-shadow: 
        0 10px 40px rgba(13, 148, 136, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    border-image: linear-gradient(45deg, var(--primary), var(--accent)) 1;
}

.full-width {
    max-width: 100% !important;
}

.terminal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    color: var(--terminal);
    font-size: 0.95rem;
    font-weight: 600;
}

.terminal-title {
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 12px;
}

.terminal-title::before {
    content: "🖥️";
    font-size: 1.2rem;
}

.terminal-controls {
    display: flex;
    gap: 10px;
}

.terminal-controls span {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.terminal-controls span:hover {
    transform: scale(1.1);
}

.terminal-controls .close { 
    background: #ff5f57;
    box-shadow: 0 2px 4px rgba(255, 95, 87, 0.3);
}
.terminal-controls .min { 
    background: #ffbd2e;
    box-shadow: 0 2px 4px rgba(255, 189, 46, 0.3);
}
.terminal-controls .max { 
    background: #28ca42;
    box-shadow: 0 2px 4px rgba(40, 202, 66, 0.3);
}

.terminal-content {
    color: var(--terminal);
    font-size: 1.15rem;
    line-height: 1.6;
    font-weight: 500;
}

.command {
    color: var(--primary);
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(67, 97, 238, 0.2);
}

.comment {
    color: #94a3b8;
    font-style: italic;
}

.success {
    color: var(--success);
    font-weight: 700;
}

/* Navigation */
nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(67, 97, 238, 0.08);
    padding: 16px 0;
    box-shadow: 0 4px 20px var(--shadow);
}

.nav-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.nav-btn {
    background: white;
    border: 2px solid var(--primary-light);
    color: var(--primary);
    padding: 12px 28px;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: -0.2px;
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.nav-btn:hover, .nav-btn.active {
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px var(--shadow-hover);
    border-color: transparent;
}

.nav-btn:hover::before, .nav-btn.active::before {
    opacity: 1;
}

/* Main Content */
main {
    padding: 60px 0;
}

section {
    margin-bottom: 100px;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

h2 {
    font-size: 2.8rem;
    margin-bottom: 40px;
    color: var(--dark);
    position: relative;
    display: inline-block;
    padding-bottom: 16px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 3px;
    animation: gradientMove 3s ease infinite;
}

h3 {
    font-size: 2rem;
    margin: 32px 0 20px;
    color: var(--primary);
    font-weight: 700;
    letter-spacing: -0.3px;
}

h4 {
    font-size: 1.5rem;
    margin: 24px 0 12px;
    color: var(--dark);
    font-weight: 600;
}

.content-box {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 36px;
    margin: 24px 0;
    border: 1px solid rgba(67, 97, 238, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 
        0 4px 20px var(--shadow),
        0 1px 3px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.content-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.content-box:hover {
    transform: translateY(-8px);
    box-shadow: 
        0 25px 50px var(--shadow-hover),
        0 8px 20px rgba(0, 0, 0, 0.08);
}

.content-box:hover::before {
    opacity: 1;
}

.content-box.virus {
    border-top: 4px solid var(--secondary);
}

.content-box.antivirus {
    border-top: 4px solid var(--success);
}

.content-box.method {
    border-top: 4px solid var(--primary);
}

.step-list {
    list-style-type: none;
    counter-reset: step-counter;
    padding-left: 0;
}

.step-list li {
    counter-increment: step-counter;
    margin-bottom: 32px;
    padding: 24px 24px 24px 80px;
    background: white;
    border-radius: 16px;
    border: 1px solid rgba(67, 97, 238, 0.15);
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.08);
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.step-list li:hover {
    transform: translateX(8px);
    box-shadow: 0 8px 24px rgba(67, 97, 238, 0.15);
}

.step-list li::before {
    content: counter(step-counter);
    position: absolute;
    left: 24px;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.2rem;
    box-shadow: 0 6px 20px rgba(67, 97, 238, 0.3);
}

.example-box {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.98));
    border: 2px solid rgba(247, 37, 133, 0.2);
    border-radius: 20px;
    padding: 28px;
    margin: 24px 0;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(247, 37, 133, 0.1);
}

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

.example-box.wrong {
    border-color: rgba(239, 68, 68, 0.2);
}

.example-box.wrong::before {
    background: linear-gradient(90deg, #ef4444, #fca5a5);
}

.example-box.right {
    border-color: rgba(6, 214, 160, 0.2);
}

.example-box.right::before {
    background: linear-gradient(90deg, var(--success), #5eead4);
}

.example-title {
    color: var(--secondary);
    font-weight: 800;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.2rem;
    letter-spacing: -0.2px;
}

.badges-container {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 20px 0;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 700;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.badge:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.badge.virus {
    background: linear-gradient(135deg, rgba(247, 37, 133, 0.1), rgba(247, 37, 133, 0.05));
    color: var(--secondary);
    border-color: rgba(247, 37, 133, 0.3);
}

.badge.antivirus {
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.1), rgba(6, 214, 160, 0.05));
    color: var(--success);
    border-color: rgba(6, 214, 160, 0.3);
}

.phase-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-top: 40px;
}

.phase-card {
    background: linear-gradient(145deg, white, #f8fafc);
    border-radius: 24px;
    padding: 32px;
    border: 1px solid rgba(67, 97, 238, 0.15);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 40px var(--shadow);
}

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

.phase-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 
        0 30px 60px var(--shadow-hover),
        0 12px 24px rgba(0, 0, 0, 0.08);
}

.phase-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(67, 97, 238, 0.03) 50%,
        transparent 70%
    );
    transform: rotate(45deg);
    transition: transform 0.6s ease;
}

.phase-card:hover::after {
    transform: rotate(45deg) translate(50%, 50%);
}

.phase-number {
    font-size: 4rem;
    font-weight: 900;
    color: rgba(67, 97, 238, 0.05);
    position: absolute;
    top: 16px;
    right: 24px;
    line-height: 1;
}

.phase-title {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 20px;
    font-weight: 800;
    letter-spacing: -0.3px;
    position: relative;
    z-index: 1;
}

/* Footer */
footer {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.98));
    padding: 60px 0 40px;
    text-align: center;
    border-top: 1px solid rgba(67, 97, 238, 0.1);
    margin-top: 80px;
    box-shadow: 0 -4px 30px var(--shadow);
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin: 32px 0;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: white;
    border-radius: 50%;
    color: var(--primary);
    font-size: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid rgba(67, 97, 238, 0.1);
    box-shadow: 0 4px 12px var(--shadow);
}

.social-icons a:hover {
    color: white;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 12px 30px var(--shadow-hover);
    border-color: transparent;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    padding: 20px 48px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 800;
    font-size: 1.3rem;
    margin: 20px 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    box-shadow: 
        0 10px 40px rgba(67, 97, 238, 0.3),
        0 4px 12px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
    letter-spacing: -0.2px;
}

.cta-button::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 0.7s ease;
}

.cta-button:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 
        0 20px 60px rgba(67, 97, 238, 0.4),
        0 8px 24px rgba(0, 0, 0, 0.12);
}

.cta-button:hover::before {
    left: 100%;
}

.center-button {
    text-align: center;
    margin-top: 60px;
}

/* Анимации */
@keyframes pulse {
    0% { 
        box-shadow: 
            0 10px 40px rgba(67, 97, 238, 0.3),
            0 0 0 0 rgba(67, 97, 238, 0.7); 
    }
    70% { 
        box-shadow: 
            0 10px 40px rgba(67, 97, 238, 0.3),
            0 0 0 15px rgba(67, 97, 238, 0); 
    }
    100% { 
        box-shadow: 
            0 10px 40px rgba(67, 97, 238, 0.3),
            0 0 0 0 rgba(67, 97, 238, 0); 
    }
}

.pulse {
    animation: pulse 2s infinite;
}

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

/* Responsive */
@media (max-width: 1024px) {
    h1 { font-size: 3.2rem; }
    h2 { font-size: 2.4rem; }
    .phase-container { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
}

@media (max-width: 768px) {
    h1 { font-size: 2.6rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.7rem; }
    .subtitle { font-size: 1.2rem; }
    .terminal-box { padding: 20px; margin: 30px auto; }
    .nav-container { flex-direction: column; align-items: stretch; }
    .nav-btn { width: 100%; margin-bottom: 8px; }
    .phase-container { grid-template-columns: 1fr; }
    .content-box { padding: 24px; }
    .step-list li { padding: 20px 20px 20px 70px; }
    .cta-button { padding: 18px 32px; font-size: 1.2rem; }
}

@media (max-width: 480px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.5rem; }
    .subtitle { font-size: 1.1rem; }
    .terminal-content { font-size: 1rem; }
    .badges-container { flex-direction: column; }
    .badge { width: 100%; justify-content: center; }
    .social-icons a { width: 48px; height: 48px; font-size: 1.3rem; }
}

/* Кастомный скроллбар */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(67, 97, 238, 0.05);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary), var(--accent));
}

/* Selection */
::selection {
    background: rgba(67, 97, 238, 0.2);
    color: var(--dark);
}