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

:root {
    --bg: #070a12;
    --card: rgba(17, 24, 39, 0.72);
    --border: rgba(255, 255, 255, 0.10);
    --text: #f8fafc;
    --muted: #94a3b8;
    --purple: #a855f7;
    --blue: #6366f1;
}

body {
    min-height: 100vh;

    font-family:
        Inter,
        Arial,
        Helvetica,
        sans-serif;

    color: var(--text);

    background:
        radial-gradient(
            circle at 10% 10%,
            rgba(168, 85, 247, 0.25),
            transparent 35%
        ),
        radial-gradient(
            circle at 90% 90%,
            rgba(99, 102, 241, 0.20),
            transparent 35%
        ),
        var(--bg);

    overflow-x: hidden;
}


/* HEADER */

.header {
    width: 100%;
    max-width: 1200px;

    margin: auto;

    padding: 25px 30px;

    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 18px;
    font-weight: 800;

    letter-spacing: 1px;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    color: var(--muted);

    text-decoration: none;

    font-size: 14px;
    font-weight: 600;

    transition: 0.25s;
}

.nav a:hover,
.nav a.active {
    color: white;
}


/* MAIN */

.main {
    width: 100%;
    max-width: 1200px;

    margin: auto;

    padding: 60px 30px 100px;
}

.hero {
    display: grid;

    grid-template-columns:
        1fr
        480px;

    gap: 80px;

    align-items: center;
}


/* HERO TEXT */

.hero-content {
    max-width: 600px;
}

.badge {
    display: inline-block;

    padding: 8px 14px;

    margin-bottom: 25px;

    border-radius: 50px;

    color: #c4b5fd;

    background: rgba(168, 85, 247, 0.10);

    border: 1px solid rgba(168, 85, 247, 0.25);

    font-size: 12px;
    font-weight: 800;

    letter-spacing: 1.5px;
}

.hero h1 {
    font-size: clamp(45px, 6vw, 76px);

    line-height: 1.05;

    letter-spacing: -3px;

    margin-bottom: 25px;
}

.hero h1 span {
    display: block;

    background:
        linear-gradient(
            135deg,
            var(--purple),
            var(--blue)
        );

    -webkit-background-clip: text;
    background-clip: text;

    color: transparent;
}

.hero-content > p {
    max-width: 500px;

    color: var(--muted);

    font-size: 18px;

    line-height: 1.7;
}


/* FORM CARD */

.form-card {
    padding: 35px;

    border-radius: 26px;

    background: var(--card);

    border: 1px solid var(--border);

    backdrop-filter: blur(20px);

    box-shadow:
        0 30px 80px rgba(0, 0, 0, 0.45),
        0 0 80px rgba(168, 85, 247, 0.08);
}

.form-card h2 {
    font-size: 27px;

    margin-bottom: 8px;
}

.form-description {
    color: var(--muted);

    margin-bottom: 28px;
}


/* SUCCESS */

.success {
    padding: 14px 16px;

    margin-bottom: 20px;

    border-radius: 12px;

    color: #86efac;

    background: rgba(34, 197, 94, 0.10);

    border: 1px solid rgba(34, 197, 94, 0.20);

    font-size: 14px;
}


/* INPUTS */

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;

    margin-bottom: 8px;

    color: #cbd5e1;

    font-size: 13px;

    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;

    padding: 14px 15px;

    border-radius: 12px;

    border: 1px solid #263244;

    outline: none;

    background: rgba(5, 10, 20, 0.65);

    color: white;

    font-family: inherit;

    font-size: 15px;

    transition: 0.25s;
}

select {
    cursor: pointer;
}

textarea {
    resize: vertical;

    min-height: 130px;
}

input::placeholder,
textarea::placeholder {
    color: #64748b;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--purple);

    box-shadow:
        0 0 0 3px rgba(168, 85, 247, 0.12),
        0 0 25px rgba(168, 85, 247, 0.08);
}


/* BUTTON */

button {
    width: 100%;

    padding: 16px;

    border: none;

    border-radius: 13px;

    cursor: pointer;

    color: white;

    font-size: 15px;

    font-weight: 800;

    background:
        linear-gradient(
            135deg,
            var(--purple),
            var(--blue)
        );

    box-shadow:
        0 12px 30px rgba(124, 58, 237, 0.25);

    transition: 0.25s;
}

button span {
    margin-left: 8px;

    font-size: 18px;
}

button:hover {
    transform: translateY(-2px);

    box-shadow:
        0 18px 40px rgba(124, 58, 237, 0.40);
}

button:active {
    transform: translateY(0);
}


/* FOOTER */

.form-footer {
    margin-top: 20px;

    text-align: center;

    color: #64748b;

    font-size: 12px;
}

.footer {
    padding: 25px;

    text-align: center;

    color: #475569;

    font-size: 12px;
}


/* MOBILE */

@media (max-width: 850px) {

    .header {
        padding: 20px;
    }

    .nav {
        display: none;
    }

    .main {
        padding: 40px 20px 70px;
    }

    .hero {
        grid-template-columns: 1fr;

        gap: 45px;
    }

    .hero h1 {
        font-size: 48px;

        letter-spacing: -2px;
    }

    .form-card {
        padding: 25px;
    }
}


@media (max-width: 450px) {

    .hero h1 {
        font-size: 40px;
    }

    .form-card {
        padding: 20px;

        border-radius: 20px;
    }
}

/* =========================
   SNAKE — OCZEKIWANIE
   ========================= */

.snake-wait {
    margin-top: 25px;
    padding: 25px;
    border: 1px solid rgba(34, 211, 238, .18);
    border-radius: 18px;
    background: rgba(5, 11, 20, .9);
    text-align: center;
}

.snake-status {
    color: #22d3ee;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 2px;
}

.snake-header h3 {
    margin: 12px 0 8px;
    color: #f8fafc;
}

.snake-header p {
    margin: 0;
    color: #94a3b8;
    line-height: 1.5;
}

.snake-score {
    margin: 20px 0 12px;
    color: #67e8f9;
    font-family: monospace;
    font-weight: bold;
    letter-spacing: 2px;
}

#snakeGame {
    display: block;
    width: 100%;
    max-width: 360px;
    height: auto;
    margin: 0 auto;
    border: 1px solid rgba(34, 211, 238, .2);
    border-radius: 10px;
    background: #050b14;
}

.snake-hint {
    margin-top: 12px;
    color: #64748b;
    font-size: 12px;
}

.snake-hint b {
    color: #94a3b8;
}

.jarvis-message {
    margin-top: 20px;
    padding: 20px;
    border: 1px solid #22d3ee;
    border-radius: 12px;
    background: rgba(8, 47, 73, .35);
    color: #cffafe;
    line-height: 1.7;
}

.jarvis-title {
    margin-bottom: 8px;
    color: #22d3ee;
    font-family: monospace;
    font-weight: bold;
    letter-spacing: 3px;
}

.jarvis-small {
    margin-top: 10px;
    color: #64748b;
    font-size: 12px;
}

.jarvis-active {
    animation: jarvisPulse 1.5s infinite;
}

@keyframes jarvisPulse {

    0%, 100% {
        box-shadow: 0 0 5px rgba(34, 211, 238, .1);
    }

    50% {
        box-shadow: 0 0 25px rgba(34, 211, 238, .35);
    }

}