:root {
    --tech-blue: #0f2a44;
    --pcb-green: #00c853;
    --interface-cyan: #00bcd4;
    --metal-gray: #37474f;
    --grid-orange: #ff9800;
    --drone-blue: #4fc3f7;
    --robot-gold: #ffb300;
    --robot-gray: #8c92ac;
    --text-light: #e0f7fa;
}

body {
    background: #0a1929;
    color: #fff;
    overflow-x: hidden;
}

/* ТЕЛО - СЦЕНА С ДРОНАМИ И РОБОТАМИ */
.main-body {
    background: linear-gradient(160deg, 
        #0a1929 0%, 
        #0f2a44 30%, 
        #1a3a5f 70%, 
        #0a1929 100%);
    min-height: 100vh;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid rgba(0, 200, 83, 0.1);
    padding-top: 100px;
}

/* ФОН - ТЕХНОЛОГИЧЕСКАЯ СЕТКА */
.tech-grid {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 188, 212, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 188, 212, 0.05) 1px, transparent 1px);
    background-size: 100px 100px;
    opacity: 0.3;
    z-index: 0;
}

/* ДРОНЫ - ЛЕТАЮЩИЕ МОДЕЛИ */
.drone {
    position: absolute;
    width: 120px;
    height: 120px;
    z-index: 1;
    filter: drop-shadow(0 0 10px rgba(79, 195, 247, 0.5));
    animation: droneFloat 25s infinite ease-in-out;
}

.drone-1 {
    top: 15%;
    left: 5%;
    animation-delay: 0s;
    width: 100px;
    height: 100px;
}

.drone-2 {
    top: 25%;
    right: 10%;
    animation-delay: -5s;
    width: 140px;
    height: 140px;
}

.drone-3 {
    bottom: 30%;
    left: 15%;
    animation-delay: -10s;
    width: 80px;
    height: 80px;
}

/* СТИЛИ ДЛЯ SVG ДРОНОВ */
.drone svg {
    width: 100%;
    height: 100%;
    animation: droneHover 3s infinite ease-in-out;
}

@keyframes droneFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(40px, -30px) rotate(5deg); }
    50% { transform: translate(20px, 40px) rotate(-3deg); }
    75% { transform: translate(-30px, 20px) rotate(2deg); }
}

@keyframes droneHover {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* РОБОТ - ОБРАЗОВАТЕЛЬНЫЙ КОНСТРУКТОР */
.robot {
    position: absolute;
    width: 120px;
    height: 180px;
    z-index: 1;
    filter: drop-shadow(0 0 8px rgba(255, 179, 0, 0.4));
    bottom: 10%;
    right: 15%;
    animation: robotFloat 20s infinite ease-in-out;
}

@keyframes robotFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -20px) rotate(3deg); }
    66% { transform: translate(-20px, 15px) rotate(-2deg); }
}

/* ТРАЕКТОРИИ ПОЛЁТА */
.star {
    position: absolute;
    width: 15px;
    height: 15px;
    z-index: 1;
    filter: drop-shadow(0 0 10px rgba(79, 195, 247, 0.5));
    top: 39.5%;
    left: 43.5%;
    animation-delay: 0s;
    width: 15px;
    height: 15px;
}

.flight-path::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 1px dashed var(--robot-gold);
    border-radius: 50%;
    animation: pathPulse 6s infinite linear reverse;
}

.flight-path {
    position: absolute;
    width: 300px;
    height: 150px;
    border: 1px dashed rgba(79, 195, 247, 0.3);
    border-radius: 50%;
    z-index: 0;
    top: 48%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(30deg);
    animation: pathPulseRobot 8s infinite linear;
    opacity: 80%;
}

@keyframes pathPulse {
    0% { 
        border-color: rgba(79, 195, 247, 0.1);
        transform: translate(-65%, -75%) rotate(10deg) scale(1);
    }
    50% { 
        border-color: rgba(79, 195, 247, 0.4);
        transform: translate(-65%, -75%) rotate(10deg) scale(1.1);
    }
    100% { 
        border-color: rgba(79, 195, 247, 0.1);
        transform: translate(-65%, -75%) rotate(10deg) scale(1);
    }
}

@keyframes pathPulseRobot {
    0% { 
        border-color: var(--robot-gold);
        transform: translate(-50%, -50%) rotate(10deg) scale(1);
    }
    50% { 
        border-color: var(--robot-gold);
        transform: translate(-50%, -50%) rotate(10deg) scale(1.1);
    }
    100% { 
        border-color: var(--robot-gold);
        transform: translate(-50%, -50%) rotate(10deg) scale(1);
    }
}

/* ИНФОРМАЦИОННЫЕ ЛУЧИ ОТ ДРОНОВ */
.data-beam {
    position: absolute;
    width: 2px;
    height: 0;
    background: linear-gradient(to bottom, 
        transparent,
        var(--interface-cyan),
        var(--pcb-green),
        transparent);
    opacity: 0;
    animation: beamScan 4s infinite;
    z-index: 0;
}

.beam-1 {
    left: 20%;
    top: 40%;
    animation-delay: 0s;
}

.beam-2 {
    left: 70%;
    top: 60%;
    animation-delay: 2s;
}

@keyframes beamScan {
    0% { 
        height: 0;
        opacity: 0;
        transform: translateY(0);
    }
    10% { 
        opacity: 0.7;
    }
    50% { 
        height: 200px;
        opacity: 0.3;
    }
    90% { 
        opacity: 0;
    }
    100% { 
        height: 0;
        opacity: 0;
        transform: translateY(200px);
    }
}

/* ОСНОВНОЙ КОНТЕНТ ШАПКИ */
.header-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    z-index: 2;
}

/* НАВИГАЦИЯ - УЛУЧШЕННАЯ ВЕРСИЯ */
/* ИЗМЕНЕНИЕ: Упростил меню, добавил разделители */
.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    position: relative;
}

.nav-link {
    color: rgba(224, 247, 250, 0.85);
    text-decoration: none;
    padding: 14px 32px;
    font-weight: 500;
    font-size: 15px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    border-radius: 12px;
}

/* ИЗМЕНЕНИЕ: Добавил разделители между пунктами меню */
.nav-link:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60%;
    background: linear-gradient(to bottom, 
        transparent, 
        rgba(255, 255, 255, 0.15), 
        transparent);
}

.nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

/* ИЗМЕНЕНИЕ: Улучшил активное состояние с градиентом по направлению */
.nav-link.active {
    background: linear-gradient(135deg, 
        rgba(79, 195, 247, 0.15), 
        rgba(0, 200, 83, 0.08));
    color: #fff;
}

/* ИЗМЕНЕНИЕ: Цвета иконок по направлениям */
.nav-icon {
    font-size: 18px;
    opacity: 0.9;
}

.nav-link[href*="drones"] .nav-icon { color: var(--drone-blue); }
.nav-link[href*="robotics"] .nav-icon { color: var(--robot-gold); }
.nav-link[href*="solutions"] .nav-icon { color: var(--pcb-green); }
.nav-link[href*="knowledge"] .nav-icon { color: var(--interface-cyan); }
.nav-link[href*="company"] .nav-icon { color: #fff; }

.nav-link.active[href*="drones"] {
    box-shadow: inset 0 0 0 1px rgba(79, 195, 247, 0.3);
}
.nav-link.active[href*="robotics"] {
    box-shadow: inset 0 0 0 1px rgba(255, 179, 0, 0.3);
}
/* КОНЕЦ ИЗМЕНЕНИЯ */

/* ГЛАВНЫЙ ЗАГОЛОВОК */
.header-hero {
    padding: 100px 0 120px;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.auth-hero {
    padding: 200px 0 120px;
    text-align: center;
    max-width: 450px;
    margin: 0 auto;
    position: relative;
}

.slogan {
    font-size: 14px;
    color: var(--pcb-green);
    letter-spacing: 3px;
    margin-bottom: 40px;
    text-transform: uppercase;
    font-weight: 300;
    font-family: 'Courier New', monospace;
}

.slogan::before, .slogan::after {
    content: '/*';
    margin: 0 15px;
    opacity: 0.5;
    color: var(--interface-cyan);
}

.slogan::before {
    content: '/*';
}

.slogan::after {
    content: '*/';
}

/* ИЗМЕНЕНИЕ: Улучшил заголовок */
.header-title {
    font-size: 3.8em;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 30px;
    text-shadow: 0 5px 30px rgba(0, 0, 0, 0.5);
}

.title-line {
    display: block;
    margin-bottom: 10px;
}

.title-line-1 {
    background: linear-gradient(135deg, 
        var(--drone-blue) 0%, 
        #a5d8ff 50%,
        var(--interface-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% auto;
    animation: gradientText 6s ease infinite;
}

.title-line-2 {
    background: linear-gradient(135deg, 
        var(--robot-gold) 0%, 
        #ffd54f 50%,
        #ffb300 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% auto;
    animation: gradientText 6s ease infinite 1s;
}

@keyframes gradientText {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}
/* КОНЕЦ ИЗМЕНЕНИЯ */

.header-subtitle {
    font-size: 1.2em;
    color: rgba(224, 247, 250, 0.9);
    max-width: 700px;
    margin: 0 auto 50px;
    font-weight: 300;
}

/* КНОПКИ - УЛУЧШЕННЫЕ */
/* ИЗМЕНЕНИЕ: Сделал кнопки более контрастными */
.header-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 60px;
}

.btn::after {
    content: '';
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.2), 
        transparent);
    transition: left 0.6s;
}

.btn:hover::after {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, 
        var(--drone-blue) 0%, 
        #0288d1 100%);
    color: white;
    border: 1px solid rgba(79, 195, 247, 0.4);
    box-shadow: 
        0 8px 32px rgba(79, 195, 247, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, 
        #0288d1 0%, 
        var(--drone-blue) 100%);
    transform: translateY(-3px);
    box-shadow: 
        0 12px 40px rgba(79, 195, 247, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-secondary {
    background: linear-gradient(135deg, 
        var(--robot-gold) 0%, 
        #f57c00 100%);
    color: white;
    border: 1px solid rgba(255, 179, 0, 0.4);
    box-shadow: 
        0 8px 32px rgba(255, 179, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, 
        #f57c00 0%, 
        var(--robot-gold) 100%);
    transform: translateY(-3px);
    box-shadow: 
        0 12px 40px rgba(255, 179, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-secondary {
  --bs-btn-color: #fff;
  --bs-btn-bg: #6c757d;
  --bs-btn-border-color: #6c757d;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #5c636a;
  --bs-btn-hover-border-color: #565e64;
  --bs-btn-focus-shadow-rgb: 130, 138, 145;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #565e64;
  --bs-btn-active-border-color: #51585e;
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #fff;
  --bs-btn-disabled-bg: #6c757d;
  --bs-btn-disabled-border-color: #6c757d;
}

.btn-outline-primary {
  --bs-btn-color: #0d6efd;
  --bs-btn-border-color: #0d6efd;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #0d6efd;
  --bs-btn-hover-border-color: #0d6efd;
  --bs-btn-focus-shadow-rgb: 13, 110, 253;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #0d6efd;
  --bs-btn-active-border-color: #0d6efd;
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #0d6efd;
  --bs-btn-disabled-bg: transparent;
  --bs-btn-disabled-border-color: #0d6efd;
  --bs-gradient: none;
}

.btn-outline-secondary {
  --bs-btn-color: #6c757d;
  --bs-btn-border-color: #6c757d;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #6c757d;
  --bs-btn-hover-border-color: #6c757d;
  --bs-btn-focus-shadow-rgb: 108, 117, 125;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #6c757d;
  --bs-btn-active-border-color: #6c757d;
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #6c757d;
  --bs-btn-disabled-bg: transparent;
  --bs-btn-disabled-border-color: #6c757d;
  --bs-gradient: none;
}

.btn-outline-success {
  --bs-btn-color: #198754;
  --bs-btn-border-color: #198754;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #198754;
  --bs-btn-hover-border-color: #198754;
  --bs-btn-focus-shadow-rgb: 25, 135, 84;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #198754;
  --bs-btn-active-border-color: #198754;
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #198754;
  --bs-btn-disabled-bg: transparent;
  --bs-btn-disabled-border-color: #198754;
  --bs-gradient: none;
}

.btn-outline-info {
  --bs-btn-color: #0dcaf0;
  --bs-btn-border-color: #0dcaf0;
  --bs-btn-hover-color: #000;
  --bs-btn-hover-bg: #0dcaf0;
  --bs-btn-hover-border-color: #0dcaf0;
  --bs-btn-focus-shadow-rgb: 13, 202, 240;
  --bs-btn-active-color: #000;
  --bs-btn-active-bg: #0dcaf0;
  --bs-btn-active-border-color: #0dcaf0;
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #0dcaf0;
  --bs-btn-disabled-bg: transparent;
  --bs-btn-disabled-border-color: #0dcaf0;
  --bs-gradient: none;
}

.btn-outline-warning {
  --bs-btn-color: #ffc107;
  --bs-btn-border-color: #ffc107;
  --bs-btn-hover-color: #000;
  --bs-btn-hover-bg: #ffc107;
  --bs-btn-hover-border-color: #ffc107;
  --bs-btn-focus-shadow-rgb: 255, 193, 7;
  --bs-btn-active-color: #000;
  --bs-btn-active-bg: #ffc107;
  --bs-btn-active-border-color: #ffc107;
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #ffc107;
  --bs-btn-disabled-bg: transparent;
  --bs-btn-disabled-border-color: #ffc107;
  --bs-gradient: none;
}

.btn-outline-danger {
  --bs-btn-color: #dc3545;
  --bs-btn-border-color: #dc3545;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #dc3545;
  --bs-btn-hover-border-color: #dc3545;
  --bs-btn-focus-shadow-rgb: 220, 53, 69;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #dc3545;
  --bs-btn-active-border-color: #dc3545;
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #dc3545;
  --bs-btn-disabled-bg: transparent;
  --bs-btn-disabled-border-color: #dc3545;
  --bs-gradient: none;
}

.btn-outline-light {
  --bs-btn-color: #f8f9fa;
  --bs-btn-border-color: #f8f9fa;
  --bs-btn-hover-color: #000;
  --bs-btn-hover-bg: #f8f9fa;
  --bs-btn-hover-border-color: #f8f9fa;
  --bs-btn-focus-shadow-rgb: 248, 249, 250;
  --bs-btn-active-color: #000;
  --bs-btn-active-bg: #f8f9fa;
  --bs-btn-active-border-color: #f8f9fa;
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #f8f9fa;
  --bs-btn-disabled-bg: transparent;
  --bs-btn-disabled-border-color: #f8f9fa;
  --bs-gradient: none;
}

.btn-outline-dark {
  --bs-btn-color: #212529;
  --bs-btn-border-color: #212529;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #212529;
  --bs-btn-hover-border-color: #212529;
  --bs-btn-focus-shadow-rgb: 33, 37, 41;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #212529;
  --bs-btn-active-border-color: #212529;
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #212529;
  --bs-btn-disabled-bg: transparent;
  --bs-btn-disabled-border-color: #212529;
  --bs-gradient: none;
}

.btn-link {
  --bs-btn-font-weight: 400;
  --bs-btn-color: var(--bs-link-color);
  --bs-btn-bg: transparent;
  --bs-btn-border-color: transparent;
  --bs-btn-hover-color: var(--bs-link-hover-color);
  --bs-btn-hover-border-color: transparent;
  --bs-btn-active-color: var(--bs-link-hover-color);
  --bs-btn-active-border-color: transparent;
  --bs-btn-disabled-color: #6c757d;
  --bs-btn-disabled-border-color: transparent;
  --bs-btn-box-shadow: none;
  --bs-btn-focus-shadow-rgb: 49, 132, 253;
  text-decoration: underline;
}
.btn-link:focus-visible {
  color: var(--bs-btn-color);
}
.btn-link:hover {
  color: var(--bs-btn-hover-color);
}
/* КОНЕЦ ИЗМЕНЕНИЯ */

/* СТАТИСТИКА - УЛУЧШЕННАЯ */
/* ИЗМЕНЕНИЕ: Добавил разделители и улучшил визуал */
.tech-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 80px;
    flex-wrap: wrap;
    position: relative;
}

.tech-stats::before {
    content: '';
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(79, 195, 247, 0.3), 
        rgba(255, 179, 0, 0.3), 
        transparent);
}

.stat {
    text-align: center;
    min-width: 140px;
    position: relative;
}

/* ИЗМЕНЕНИЕ: Добавил разделители между статистиками */
.stat:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -30px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, 
        transparent, 
        rgba(255, 255, 255, 0.1), 
        transparent);
}

.stat-value {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 8px;
}

.stat-drone {
    color: var(--drone-blue);
    text-shadow: 0 0 15px rgba(79, 195, 247, 0.3);
}

.stat-robot {
    color: var(--robot-gold);
    text-shadow: 0 0 15px rgba(255, 179, 0, 0.3);
}

.stat-label {
    font-size: 13px;
    color: rgba(224, 247, 250, 0.7);
    letter-spacing: 1px;
    text-transform: uppercase;
    opacity: 0.8;
}
/* КОНЕЦ ИЗМЕНЕНИЯ */

/* ТЕЛО */

/* КЕЙСЫ */
.about-us {
    background: linear-gradient(135deg, 
        rgba(15, 42, 68, 0.8) 0%,
        rgba(10, 25, 41, 0.9) 100%);
}

/* КОНЕЦ ИЗМЕНЕНИЯ */

/* ФУТЕР */
footer {
    background: rgba(10, 25, 41, 0.9);
    border-top: 1px solid rgba(79, 195, 247, 0.1);
}

.footer-column h4 {
    color: var(--drone-blue);
}

.footer-column a, .footer-column div {
    color: rgba(224, 247, 250, 0.8);
}

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

.copyright {
    color: rgba(224, 247, 250, 0.6);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}


/* АДАПТИВНОСТЬ */
@media (max-width: 480px) {
    .header-hero {
        padding: 50px 8px 100px;
    }
}

@media (max-width: 1024px) {
    .header-title {
        font-size: 3.2em;
    }
    
    .drone, .robot {
        transform: scale(0.7);
    }
    
    .tech-stats {
        gap: 40px;
    }
    
    /* ИЗМЕНЕНИЕ: Адаптивность для меню */
    
    .nav-link {
        padding: 12px 24px;
        font-size: 14px;
    }
}

/*@media (max-height: 1088px) {
    .header-hero {
        padding: 50px 0 120px;
    }

    .slogan {
        font-size: 0.8em;
        margin-bottom: 20px;
    }

    .header-title {
        font-size: 2.8em;
        font-weight: 800;
        margin-bottom: 20px;
    }

    .header-subtitle {
        font-size: 1em;
        margin-bottom: 25px;
    }

    .header-cta {
        margin-top: 30px;
    }

    .tech-stats {
        margin-top: 40px;
    }
}*/

@media (max-width: 768px) {
    .header-top {
        flex-direction: column;
        gap: 20px;
        padding: 20px 0;
    }
    
    .header-title {
        font-size: 2.4em;
    }
    
    .header-subtitle {
        font-size: 1.1em;
        padding: 0 20px;
    }
    
    .header-cta {
        flex-direction: column;
        align-items: center;
        padding: 0 20px;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .tech-stats {
        gap: 30px;
        margin-top: 60px;
    }
    
    /* ИЗМЕНЕНИЕ: Убираю разделители в мобильной версии */
    .stat:not(:last-child)::after {
        display: none;
    }
    
    .nav-link {
        padding: 10px 20px;
        white-space: nowrap;
    }
    
    .nav-link:not(:last-child)::after {
        height: 40%;
    }
    
    .drone, .robot {
        display: none;
    }
}



/* ФОН - СХЕМА ПЛАТЫ */
.pcb-overlay {
    /*position: absolute;*/
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        /* Горизонтальные линии шин питания */
        linear-gradient(to right, 
            transparent 95%, 
            rgba(0, 200, 83, 0.03) 100%),
        linear-gradient(to right, 
            transparent 97%, 
            rgba(0, 188, 212, 0.02) 100%),
        
        /* Вертикальные соединения */
        linear-gradient(to bottom, 
            transparent 96%, 
            rgba(255, 152, 0, 0.03) 100%),
        
        /* Контактные площадки */
        radial-gradient(circle at 15% 20%, 
            rgba(0, 200, 83, 0.1) 0px, 
            transparent 2px),
        radial-gradient(circle at 85% 40%, 
            rgba(0, 188, 212, 0.1) 0px, 
            transparent 3px),
        radial-gradient(circle at 50% 70%, 
            rgba(255, 152, 0, 0.1) 0px, 
            transparent 2px);
    background-size: 80px 80px, 120px 120px, 60px 60px, 200px 200px, 250px 250px, 180px 180px;
    opacity: 0.3;
    z-index: 1;
}

/* 3D СЕТКА ПРОСТРАНСТВА */
.grid-3d {
    position: absolute;
    width: 300%;
    height: 300%;
    top: -100%;
    left: -100%;
    background-image: 
        linear-gradient(rgba(0, 188, 212, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 188, 212, 0.05) 1px, transparent 1px),
        linear-gradient(rgba(255, 152, 0, 0.03) 2px, transparent 2px),
        linear-gradient(90deg, rgba(255, 152, 0, 0.03) 2px, transparent 2px);
    background-size: 50px 50px, 50px 50px, 200px 200px, 200px 200px;
    transform: perspective(800px) rotateX(60deg);
    animation: gridMove 40s linear infinite;
    z-index: 0;
}

@keyframes gridMove {
    0% { transform: perspective(800px) rotateX(60deg) translateY(0); }
    100% { transform: perspective(800px) rotateX(60deg) translateY(100px); }
}