@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500&family=Press+Start+2P&display=swap');

:root {
    --bg-black: #111111;
    --card-bg: #1a1a1a;
    --mc-green: #5cb85c;
    --text-gray: #888;
    --border: #333;
}

* { box-sizing: border-box; outline: none; }

body {
    margin: 0;
    background-color: var(--bg-black);
    color: white;
    font-family: 'Inter', sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Фоновая сетка */
.grid-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: 
        linear-gradient(to right, rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
}

.mc-font { font-family: 'Press Start 2P', cursive; }

.navbar {
    display: flex;
    justify-content: space-between;
    padding: 25px 50px;
    align-items: center;
}

.nav-links a {
    color: #eee;
    text-decoration: none;
    margin-left: 30px;
    font-size: 13px;
    transition: color 0.3s;
}

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

.hero {
    text-align: center;
    padding: 40px 20px;
}

.badge {
    font-size: 9px;
    color: var(--mc-green);
    border: 1px solid var(--mc-green);
    padding: 6px 12px;
    display: inline-block;
    margin-bottom: 25px;
}

.title {
    font-size: 40px;
    line-height: 1.2;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.green-text { color: var(--mc-green); text-shadow: 0 0 15px rgba(92,184,92,0.4); }

.desc {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 40px;
}

/* Карточка */
.calc-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    max-width: 550px;
    margin: 0 auto;
    padding: 40px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.price-info { color: var(--text-gray); font-size: 11px; margin-bottom: 30px; }

/* Поле ввода ГБ */
.value-display {
    border-bottom: 2px solid var(--border);
    margin-bottom: 25px;
    display: inline-flex;
    align-items: baseline;
    padding-bottom: 5px;
}

#gb-input {
    background: transparent;
    border: none;
    color: var(--mc-green);
    font-size: 50px;
    width: 220px;
    text-align: right;
    appearance: textfield;
}

#gb-input::-webkit-outer-spin-button,
#gb-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.gb-label { font-size: 18px; color: white; margin-left: 10px; }

/* Слайдер */
.slider-container {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 35px;
}

.range-limit { font-size: 10px; color: var(--text-gray); width: 50px; }

input[type=range] {
    flex-grow: 1;
    -webkit-appearance: none;
    background: #333;
    height: 6px;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 22px;
    width: 22px;
    background: #fff;
    cursor: pointer;
    border: 2px solid #000;
}

/* Кнопки */
.preset-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.preset-buttons button {
    background: #252525;
    border: 1px solid var(--border);
    color: #ccc;
    padding: 12px;
    font-size: 10px;
    cursor: pointer;
    transition: 0.2s;
}

.preset-buttons button.active {
    background: var(--mc-green);
    color: black;
    border-color: var(--mc-green);
}

.preset-buttons .wide { grid-column: span 3; }

.total-box { margin-top: 40px; }
.total-box p { font-size: 12px; color: var(--text-gray); margin-bottom: 8px; }
.price-result { font-size: 32px; color: #fff; margin-bottom: 30px; }

.get-started-btn {
    display: block;
    text-decoration: none;
    border: 1px solid var(--mc-green);
    color: var(--mc-green);
    padding: 20px;
    font-size: 14px;
    transition: 0.3s;
}

.get-started-btn:hover {
    background: var(--mc-green);
    color: black;
    box-shadow: 0 0 25px rgba(92, 184, 92, 0.4);
}