:root {
    --bg-dark: #0a0a0a;
    --forest-deep: #141d16;
    --metal-light: #e0e0e0;
    --metal-dark: #a1a1a1;
    --accent-red: #ff4d4d;
}

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

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--metal-light);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Атмосферный фон */
.background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, var(--forest-deep) 0%, var(--bg-dark) 80%);
    opacity: 0.7;
    animation: backgroundPulse 10s infinite alternate;
    z-index: 1;
}

.main-container {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 700px;
    padding: 20px;
}

header {
    margin-bottom: 40px;
}

.site-logo {
    animation: logoEmerge 2.5s ease-out;
    filter: drop-shadow(0 0 8px rgba(161, 161, 161, 0.2));
}

/* Анимация заголовка */
h1 {
    font-size: 2.2rem;
    font-weight: 300;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 25px;
}

h1 span {
    opacity: 0;
    display: inline-block;
    transform: translateY(10px);
    animation: fadeIn 0.8s forwards;
    animation-delay: calc(var(--i) * 0.4s);
}

.description {
    font-size: 1.1rem;
    color: var(--metal-dark);
    margin-bottom: 50px;
    line-height: 1.8;
    font-weight: 300;
    opacity: 0;
    animation: fadeIn 1.2s forwards;
    animation-delay: 2s;
}

/* Кнопка "Откликнуться" */
.action-area {
    opacity: 0;
    animation: fadeIn 1.2s forwards;
    animation-delay: 2.8s;
}

.cta-button {
    display: inline-block;
    padding: 18px 45px;
    border: 1px solid var(--metal-dark);
    color: var(--metal-dark);
    text-decoration: none;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 2px;
    transition: all 0.4s ease;
    background: transparent;
}

.cta-button:hover {
    color: var(--bg-dark);
    background: var(--metal-light);
    border-color: var(--metal-light);
    box-shadow: 0 0 20px rgba(224, 224, 224, 0.4);
    transform: translateY(-2px);
}

footer {
    position: absolute;
    bottom: -100px;
    width: 100%;
    left: 0;
    font-size: 0.7rem;
    color: #444;
    text-transform: uppercase;
    letter-spacing: 4px;
    opacity: 0;
    animation: fadeIn 1.5s forwards;
    animation-delay: 3.5s;
}

/* Анимации */
@keyframes fadeIn {
    to { opacity: 1; transform: translateY(0); }
}

@keyframes logoEmerge {
    from { transform: scale(0.9) rotate(-10deg); opacity: 0; }
    to { transform: scale(1) rotate(0); opacity: 1; }
}

@keyframes backgroundPulse {
    from { opacity: 0.6; transform: scale(1); }
    to { opacity: 0.8; transform: scale(1.05); }
}

/* Адаптивность */
@media (max-width: 600px) {
    h1 { font-size: 1.5rem; }
    .description { font-size: 1rem; }
}