/* =========================
   AWS CLOUD LAB
   DESIGN SYSTEM
========================= */

:root {
    --background: #070809;
    --background-soft: #0b0d10;

    --surface: #101216;
    --surface-hover: #15181d;
    --surface-light: #191c22;

    --border: #272b32;
    --border-bright: #3a3f48;

    --text: #f4f4f5;
    --text-secondary: #989da7;
    --text-dark: #656b75;

    --accent: #ff9900;
    --accent-light: #ffb84d;
    --accent-soft: rgba(255, 153, 0, 0.10);

    --success: #3fb950;
    --success-soft: rgba(63, 185, 80, 0.10);
}


/* =========================
   RESET
========================= */

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--background);
    color: var(--text);

    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;

    line-height: 1.6;
}

a {
    color: inherit;
}


/* =========================
   SCROLLBAR
========================= */

::-webkit-scrollbar {
    width: 9px;
}

::-webkit-scrollbar-track {
    background: var(--background);
}

::-webkit-scrollbar-thumb {
    background: var(--border-bright);
    border-radius: 20px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}


/* =========================
   NAVIGATION
========================= */

nav {
    position: sticky;
    top: 0;
    z-index: 1000;

    background: rgba(7, 8, 9, 0.88);
    backdrop-filter: blur(14px);

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

.nav-container {
    width: 100%;
    max-width: 1200px;

    margin: 0 auto;
    padding: 19px 30px;

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

.logo {
    color: var(--text);

    font-size: 23px;
    font-weight: 800;
    letter-spacing: -1px;

    text-decoration: none;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links a {
    position: relative;

    color: var(--text-secondary);

    font-size: 13px;
    font-weight: 500;

    text-decoration: none;

    transition: color 0.2s ease;
}

.nav-links a::after {
    content: "";

    position: absolute;
    left: 0;
    bottom: -7px;

    width: 0;
    height: 1px;

    background: var(--accent);

    transition: width 0.25s ease;
}

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

.nav-links a:hover::after {
    width: 100%;
}


/* =========================
   HERO
========================= */

.hero {
    position: relative;
    overflow: hidden;

    min-height: 82vh;

    display: flex;
    align-items: center;

    background:
        radial-gradient(
            circle at 80% 20%,
            rgba(255, 153, 0, 0.08),
            transparent 30%
        ),
        var(--background);

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


/* subtle infrastructure grid */

.hero::before {
    content: "";

    position: absolute;
    inset: 0;

    background-image:
        linear-gradient(
            rgba(255, 255, 255, 0.018) 1px,
            transparent 1px
        ),
        linear-gradient(
            90deg,
            rgba(255, 255, 255, 0.018) 1px,
            transparent 1px
        );

    background-size: 55px 55px;

    mask-image:
        linear-gradient(
            to bottom,
            black,
            transparent 85%
        );

    pointer-events: none;
}

.hero::after {
    content: "";

    position: absolute;

    width: 500px;
    height: 500px;

    right: -180px;
    top: -180px;

    background: rgba(255, 153, 0, 0.08);
    filter: blur(110px);

    border-radius: 50%;

    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;

    width: 100%;
    max-width: 1200px;

    margin: 0 auto;
    padding: 110px 30px;
}

.eyebrow,
.section-label {
    color: var(--accent);

    font-family: "Courier New", monospace;
    font-size: 12px;
    font-weight: 700;

    letter-spacing: 2.5px;
}

.hero h1 {
    max-width: 1050px;

    margin: 22px 0 30px;

    font-size: clamp(50px, 7vw, 92px);
    font-weight: 800;

    line-height: 0.96;
    letter-spacing: -5px;
}

.hero h1 span {
    color: var(--accent);
}

.hero-description {
    max-width: 700px;

    margin-bottom: 35px;

    color: var(--text-secondary);

    font-size: 19px;
    line-height: 1.8;
}


/* =========================
   SERVER STATUS
========================= */

.status {
    width: fit-content;

    display: flex;
    align-items: center;
    gap: 10px;

    padding: 10px 15px;

    background: var(--success-soft);

    border: 1px solid rgba(63, 185, 80, 0.25);
    border-radius: 6px;

    color: var(--success);

    font-family: "Courier New", monospace;
    font-size: 12px;
    font-weight: 700;

    letter-spacing: 0.5px;
}

.status-dot {
    width: 8px;
    height: 8px;

    background: var(--success);
    border-radius: 50%;

    box-shadow:
        0 0 8px var(--success),
        0 0 16px rgba(63, 185, 80, 0.4);

    animation: serverPulse 2s infinite;
}

@keyframes serverPulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.4;
    }
}


/* =========================
   MAIN CONTENT
========================= */

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

    margin: 0 auto;
    padding: 0 30px;
}

section {
    padding: 115px 0;

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

section:last-child {
    border-bottom: none;
}

section h2 {
    max-width: 900px;

    margin-top: 10px;
    margin-bottom: 45px;

    color: var(--text);

    font-size: clamp(35px, 5vw, 58px);
    font-weight: 750;

    line-height: 1.05;
    letter-spacing: -3px;
}


/* =========================
   ARCHITECTURE FLOW
========================= */

.traffic-flow {
    position: relative;

    display: flex;
    align-items: center;
    flex-wrap: wrap;

    gap: 12px;

    padding: 32px;

    background: var(--surface);

    border: 1px solid var(--border);
    border-radius: 12px;
}

.traffic-flow div {
    position: relative;

    padding: 14px 18px;

    background: var(--surface-light);

    border: 1px solid var(--border-bright);
    border-radius: 6px;

    color: var(--text);

    font-family: "Courier New", monospace;
    font-size: 13px;

    transition:
        border-color 0.25s ease,
        transform 0.25s ease,
        background 0.25s ease;
}

.traffic-flow div:hover {
    transform: translateY(-3px);

    background: var(--surface-hover);
    border-color: var(--accent);
}

.traffic-flow span {
    color: var(--accent);

    font-family: monospace;
    font-size: 22px;
}


/* =========================
   INFRASTRUCTURE CARDS
========================= */

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);

    gap: 18px;
}

.card {
    position: relative;
    overflow: hidden;

    min-height: 240px;

    padding: 30px;

    background:
        linear-gradient(
            145deg,
            var(--surface),
            var(--background-soft)
        );

    border: 1px solid var(--border);
    border-radius: 12px;

    transition:
        transform 0.25s ease,
        border-color 0.25s ease,
        box-shadow 0.25s ease;
}


/* orange line across card */

.card::before {
    content: "";

    position: absolute;

    top: 0;
    left: 0;

    width: 0;
    height: 2px;

    background: var(--accent);

    transition: width 0.3s ease;
}

.card:hover {
    transform: translateY(-6px);

    border-color: rgba(255, 153, 0, 0.45);

    box-shadow:
        0 18px 45px rgba(0, 0, 0, 0.28);
}

.card:hover::before {
    width: 100%;
}

.card-number {
    color: var(--accent);

    font-family: "Courier New", monospace;
    font-size: 12px;
    font-weight: 700;

    letter-spacing: 1px;
}

.card h3 {
    margin: 24px 0 12px;

    color: var(--text);

    font-size: 22px;
}

.card p:last-child {
    color: var(--text-secondary);

    font-size: 15px;
    line-height: 1.75;
}


/* =========================
   SECURITY
========================= */

.security-box {
    display: grid;
    grid-template-columns: 1fr 1fr;

    overflow: hidden;

    background: var(--surface);

    border: 1px solid var(--border);
    border-radius: 12px;
}

.security-box div {
    position: relative;

    padding: 42px;

    transition: background 0.2s ease;
}

.security-box div:hover {
    background: var(--surface-hover);
}

.security-box div:first-child {
    border-right: 1px solid var(--border);
}

.security-box span {
    display: block;

    margin-bottom: 10px;

    color: var(--accent);

    font-family: "Courier New", monospace;
    font-size: 12px;
    font-weight: 700;

    letter-spacing: 2px;
}

.security-box strong {
    display: block;

    margin-bottom: 8px;

    color: var(--text);

    font-family: "Courier New", monospace;
    font-size: 30px;
}

.security-box p {
    color: var(--text-secondary);
}


/* =========================
   WHAT I LEARNED
========================= */

.large-text {
    max-width: 950px;

    color: var(--text-secondary);

    font-size: clamp(20px, 2.5vw, 28px);
    line-height: 1.7;
}


/* =========================
   TEXT SELECTION
========================= */

::selection {
    background: var(--accent);
    color: #000;
}


/* =========================
   FOOTER
========================= */

footer {
    width: 100%;
    max-width: 1200px;

    margin: 0 auto;
    padding: 40px 30px;

    display: flex;
    justify-content: space-between;

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

    color: var(--text-dark);

    font-family: "Courier New", monospace;
    font-size: 12px;
}


/* =========================
   MOBILE
========================= */

@media (max-width: 900px) {

    .nav-links {
        display: none;
    }

    .hero {
        min-height: 75vh;
    }

    .hero h1 {
        letter-spacing: -3px;
    }

    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .traffic-flow {
        align-items: flex-start;
        flex-direction: column;
    }

    .traffic-flow span {
        margin-left: 20px;
        transform: rotate(90deg);
    }
}


@media (max-width: 650px) {

    .nav-container,
    .hero-content,
    main,
    footer {
        padding-left: 20px;
        padding-right: 20px;
    }

    .hero h1 {
        font-size: 48px;
        letter-spacing: -2px;
    }

    section {
        padding: 80px 0;
    }

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

    .security-box {
        grid-template-columns: 1fr;
    }

    .security-box div:first-child {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    footer {
        flex-direction: column;
        gap: 10px;
    }
}