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

:root {
    --background: #071014;
    --background-secondary: #0b171c;
    --card: #0d1b21;
    --border: #18343d;

    --primary: #00e5a8;
    --secondary: #00a8ff;

    --text: #e4f0f3;
    --muted: #82979e;
}

body {
    background:
        radial-gradient(circle at 70% 20%, #0b2c2b 0%, transparent 35%),
        var(--background);

    color: var(--text);

    font-family:
        "Courier New",
        Consolas,
        monospace;

    min-height: 100vh;
}


/* -------------------------------------------------
   HEADER
-------------------------------------------------- */

header {
    height: 80px;

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

    padding: 0 7%;

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

    background: rgba(7, 16, 20, 0.85);
}


.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-icon {
    width: 42px;
    height: 42px;

    display: flex;
    align-items: center;
    justify-content: center;

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

    color: var(--primary);

    font-size: 22px;
    font-weight: bold;
}

.logo strong {
    font-size: 20px;
    letter-spacing: 2px;
}

.logo span {
    display: block;

    color: var(--muted);

    font-size: 11px;
    letter-spacing: 4px;
}


.status {
    color: var(--primary);

    font-size: 12px;
    letter-spacing: 2px;
}

.status-dot {
    display: inline-block;

    width: 8px;
    height: 8px;

    background: var(--primary);

    border-radius: 50%;

    margin-right: 8px;

    box-shadow: 0 0 12px var(--primary);
}


/* -------------------------------------------------
   MAIN
-------------------------------------------------- */

main {
    max-width: 1150px;

    margin: auto;

    padding: 80px 30px;
}


/* -------------------------------------------------
   HERO
-------------------------------------------------- */

.hero {
    max-width: 850px;

    margin-bottom: 100px;
}

.tag {
    display: inline-block;

    color: var(--primary);

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

    padding: 8px 12px;

    font-size: 11px;

    letter-spacing: 3px;

    margin-bottom: 25px;
}

.hero h1 {
    font-size: clamp(65px, 10vw, 125px);

    line-height: 0.85;

    letter-spacing: -8px;

    margin-bottom: 40px;
}

.hero h1 span {
    display: block;

    color: transparent;

    -webkit-text-stroke: 1px var(--primary);
}

.description {
    max-width: 700px;

    color: #a8bbc0;

    font-size: 17px;

    line-height: 1.8;

    margin-bottom: 30px;
}


.technologies {
    display: flex;
    flex-wrap: wrap;

    gap: 10px;

    margin-bottom: 45px;
}

.technologies span {
    padding: 8px 13px;

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

    color: var(--muted);

    font-size: 11px;
}


/* -------------------------------------------------
   PACKET
-------------------------------------------------- */

.packet {
    background: #050c0f;

    border-left: 3px solid var(--primary);

    padding: 25px;
}

.packet-title {
    color: var(--muted);

    font-size: 10px;

    letter-spacing: 3px;

    margin-bottom: 15px;
}

.packet code {
    color: var(--primary);

    font-size: 15px;
}


/* -------------------------------------------------
   SECTIONS
-------------------------------------------------- */

.protocol-section,
.frame-section {
    margin-bottom: 90px;
}

.section-title {
    padding-bottom: 15px;

    margin-bottom: 30px;

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

    color: var(--muted);

    font-size: 12px;

    letter-spacing: 4px;
}

.section-title span {
    color: var(--primary);

    margin-right: 15px;
}


/* -------------------------------------------------
   CARDS
-------------------------------------------------- */

.cards {
    display: grid;

    grid-template-columns: repeat(3, 1fr);

    gap: 20px;
}

.card {
    position: relative;

    padding: 35px;

    background: var(--card);

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

    transition: 0.3s;
}

.card:hover {
    border-color: var(--primary);

    transform: translateY(-4px);
}

.protocol-number {
    color: var(--primary);

    font-size: 13px;

    margin-bottom: 35px;
}

.card h2 {
    margin-bottom: 15px;

    font-size: 22px;
}

.card p {
    color: var(--muted);

    font-family: Arial, sans-serif;

    line-height: 1.7;

    font-size: 14px;
}


/* -------------------------------------------------
   FRAME
-------------------------------------------------- */

.frame {
    display: grid;

    grid-template-columns:
        1fr 1fr 1.3fr 2fr 1.3fr 1fr 1fr;

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

    overflow-x: auto;
}

.frame div {
    min-width: 95px;

    padding: 22px 10px;

    text-align: center;

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

.frame div:last-child {
    border-right: none;
}

.frame strong {
    display: block;

    color: var(--primary);

    font-size: 13px;

    margin-bottom: 8px;
}

.frame small {
    color: var(--muted);

    font-size: 8px;

    letter-spacing: 1px;
}

.note {
    color: var(--muted);

    font-size: 11px;

    margin-top: 20px;
}


/* -------------------------------------------------
   FOOTER
-------------------------------------------------- */

footer {
    display: flex;

    justify-content: space-between;

    padding: 30px 7%;

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

    color: var(--muted);

    font-size: 11px;
}

footer strong {
    color: var(--primary);
}


/* -------------------------------------------------
   RESPONSIVE
-------------------------------------------------- */

@media (max-width: 750px) {

    header {
        padding: 0 20px;
    }

    main {
        padding: 60px 20px;
    }

    .hero h1 {
        letter-spacing: -4px;
    }

    .cards {
        grid-template-columns: 1fr;
    }

    .packet {
        overflow-x: auto;
    }

    footer {
        flex-direction: column;

        gap: 10px;
    }
}