:root {
    --bg: #050810;
    --bg-soft: #09101c;
    --panel: #0d1625;
    --panel-hover: #111e31;
    --line: #1e2c3d;
    --text: #f5f7fb;
    --muted: #8f9bad;
    --accent: #42b9ff;
    --accent-soft: rgba(66, 185, 255, 0.12);
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: Inter, Pretendard, Arial, Helvetica, sans-serif;
    line-height: 1.6;
}

a {
    color: inherit;
}

.container {
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
}

.header {
    position: fixed;
    z-index: 1000;
    top: 0;
    width: 100%;
    background: rgba(5, 8, 16, 0.82);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav {
    height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand,
.footer-brand {
    font-weight: 900;
    letter-spacing: 4px;
    text-decoration: none;
}

.brand {
    font-size: 21px;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--muted);
    font-size: 14px;
    transition: 0.2s ease;
}

.nav-menu a:hover {
    color: white;
}

.nav-cta {
    border: 1px solid var(--line);
    padding: 9px 17px;
    border-radius: 100px;
    font-size: 13px;
    text-decoration: none;
}

.hero {
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 76px;
}

.hero-content {
    position: relative;
    z-index: 2;
    padding-top: 70px;
    padding-bottom: 80px;
}

.hero-glow {
    position: absolute;
    border-radius: 999px;
    filter: blur(100px);
    opacity: 0.42;
}

.glow-one {
    width: 520px;
    height: 520px;
    background: #0078ff;
    right: 2%;
    top: 20%;
}

.glow-two {
    width: 320px;
    height: 320px;
    background: #00d8ff;
    right: 25%;
    bottom: -10%;
    opacity: 0.18;
}

.eyebrow,
.section-kicker {
    color: var(--accent);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 2.5px;
}

.hero h1 {
    margin: 24px 0 30px;
    font-size: clamp(58px, 8.5vw, 116px);
    line-height: 0.93;
    letter-spacing: -6px;
    max-width: 1100px;
}

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

.hero-description {
    max-width: 690px;
    font-size: 20px;
    color: var(--muted);
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin-top: 36px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    transition: 0.25s ease;
}

.button-primary {
    background: white;
    color: #07101a;
}

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

.button-secondary {
    border: 1px solid var(--line);
}

.button-secondary:hover {
    background: var(--panel);
}

.hero-tags {
    margin-top: 70px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.hero-tags span {
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid var(--line);
    color: #aeb9c6;
    font-size: 12px;
}

.section {
    padding: 140px 0;
}

.section-dark {
    background: #070c14;
    border-top: 1px solid rgba(255,255,255,0.04);
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.section-header {
    margin-bottom: 60px;
}

.section-header h2,
.vision-content h2,
.contact-box h2 {
    margin-top: 18px;
    font-size: clamp(42px, 6vw, 76px);
    line-height: 1.02;
    letter-spacing: -4px;
}

.section-header > p {
    margin-top: 20px;
    color: var(--muted);
    font-size: 18px;
    max-width: 670px;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
}

.large-text {
    font-size: 30px;
    line-height: 1.4;
}

.about-grid > div:last-child {
    color: var(--muted);
    font-size: 17px;
}

.about-grid > div:last-child p + p {
    margin-top: 22px;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.solution-card {
    min-height: 330px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 28px;
    transition: 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-5px);
    background: var(--panel-hover);
    border-color: rgba(66, 185, 255, 0.4);
}

.card-number {
    color: #617083;
    font-size: 12px;
}

.card-icon {
    margin-top: 36px;
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: var(--accent-soft);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
}

.solution-card h3 {
    margin-top: 28px;
    font-size: 22px;
}

.solution-card p {
    margin-top: 14px;
    color: var(--muted);
}

.card-tag {
    display: inline-block;
    margin-top: 26px;
    color: var(--accent);
    font-size: 12px;
}

.accent-card {
    background:
        linear-gradient(
            145deg,
            rgba(66,185,255,0.14),
            rgba(13,22,37,1)
        );
}

.technology-list {
    border-top: 1px solid var(--line);
}

.technology-item {
    display: grid;
    grid-template-columns: 80px 1fr 1fr;
    align-items: center;
    min-height: 130px;
    border-bottom: 1px solid var(--line);
}

.technology-item > span {
    color: var(--accent);
    font-size: 12px;
}

.technology-item h3 {
    font-size: 23px;
}

.technology-item p {
    color: var(--muted);
}

.vision-section {
    position: relative;
    padding: 170px 0;
    overflow: hidden;
    text-align: center;
    background:
        radial-gradient(
            circle at center,
            rgba(0, 120, 255, 0.16),
            transparent 45%
        );
}

.vision-content h2 {
    margin-top: 20px;
}

.vision-content > p {
    max-width: 620px;
    margin: 28px auto 0;
    color: var(--muted);
    font-size: 18px;
}

.vision-flow {
    margin-top: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
}

.vision-flow span {
    padding: 12px 18px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(9, 16, 28, 0.7);
}

.vision-flow b {
    color: var(--accent);
}

.contact-section {
    padding: 130px 0;
}

.contact-box {
    padding: 80px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background:
        linear-gradient(
            135deg,
            rgba(66,185,255,0.09),
            rgba(13,22,37,0.7)
        );
}

.contact-box p {
    margin: 24px 0 35px;
    color: var(--muted);
}

.footer {
    border-top: 1px solid var(--line);
    padding: 50px 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 30px;
}

.footer-brand {
    font-size: 19px;
}

.footer p {
    margin-top: 8px;
    color: #6f7d8e;
    font-size: 13px;
}

.footer-right {
    text-align: right;
}

.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 900px) {

    .nav-menu {
        display: none;
    }

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

    .about-grid {
        grid-template-columns: 1fr;
        gap: 35px;
    }

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

    .technology-item {
        grid-template-columns: 50px 1fr;
        padding: 25px 0;
    }

    .technology-item p {
        grid-column: 2;
        margin-top: 8px;
    }

    .contact-box {
        padding: 50px 35px;
    }
}

@media (max-width: 600px) {

    .container {
        width: min(calc(100% - 32px), var(--max-width));
    }

    .nav-cta {
        display: none;
    }

    .hero h1 {
        font-size: 52px;
        letter-spacing: -3px;
    }

    .hero-description {
        font-size: 17px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

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

    .section {
        padding: 100px 0;
    }

    .section-header h2,
    .vision-content h2,
    .contact-box h2 {
        letter-spacing: -2px;
    }

    .technology-item {
        grid-template-columns: 40px 1fr;
    }

    .vision-flow {
        flex-direction: column;
    }

    .vision-flow b {
        transform: rotate(90deg);
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-right {
        text-align: left;
    }
}