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

html,
body {
    min-width: 1200px;
    overflow-x: hidden;

    background: #ecece7;
    color: #171918;

    font-family: "Pretendard", sans-serif;
    word-break: keep-all;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    border: 0;
    background: none;
    color: inherit;
    font: inherit;
    cursor: pointer;
}

/* =========================
   HEADER
========================= */
/* =========================
   COMMON HEADER
========================= */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;

    width: 100%;
    height: 90px;

    background: rgba(255, 255, 255, 0.08);

    border-bottom:
        1px solid
        rgba(255, 255, 255, 0.15);

    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;

    width: 1200px;
    height: 100%;

    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo img {
    display: block;

    width: 120px;
    height: auto;
}

.nav {
    display: flex;
    align-items: center;
    gap: 42px;
}

.nav a {
    position: relative;

    color: rgba(255, 255, 255, 0.85);

    font-size: 15px;
    line-height: 1;
    font-weight: 600;

    transition: color 0.2s ease;
}

.nav a:hover,
.nav a.is-active {
    color: #fff;
}

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

    position: absolute;
    left: 0;
    bottom: -9px;

    width: 100%;
    height: 1px;

    background: currentColor;

    transform: scaleX(0);
    transform-origin: right center;

    transition: transform 0.25s ease;
}

.nav a:hover::after,
.nav a.is-active::after {
    transform: scaleX(1);
    transform-origin: left center;
}

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

.hero-section {
    position: relative;

    height: 100vh;
    min-height: 720px;

    padding-top: 90px;
    overflow: hidden;

    background: #69736f;
    color: #fff;
}

.hero-visual {
    position: absolute;
    inset: 0;
    z-index: 0;

    background:
        url("../img/about/about-bg.webp")
        center center / cover no-repeat;

    filter:
        saturate(0.55)
        contrast(0.92)
        brightness(0.9);

    transform: scale(1.04);

    animation:
        heroBackgroundMove
        14s ease-in-out infinite alternate;

    will-change: transform;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;

    background:
        linear-gradient(
            90deg,
            rgba(29, 35, 32, 0.78) 0%,
            rgba(45, 53, 49, 0.58) 48%,
            rgba(76, 84, 79, 0.4) 100%
        ),
        linear-gradient(
            180deg,
            rgba(20, 24, 22, 0.22) 0%,
            rgba(20, 24, 22, 0.04) 55%,
            rgba(20, 24, 22, 0.3) 100%
        ),
        rgba(91, 106, 99, 0.12);
}

.hero-section::before {
    content: "";

    position: absolute;
    inset: 0;
    z-index: 2;

    opacity: 0.11;

    background-image:
        linear-gradient(
            rgba(255, 255, 255, 0.09) 1px,
            transparent 1px
        ),
        linear-gradient(
            90deg,
            rgba(255, 255, 255, 0.09) 1px,
            transparent 1px
        );

    background-size: 60px 60px;

    pointer-events: none;
}

.hero-section::after {
    content: "";

    position: absolute;
    inset: 0;
    z-index: 2;

    background:
        radial-gradient(
            circle at 82% 16%,
            rgba(255, 255, 255, 0.13),
            transparent 28%
        );

    pointer-events: none;
}

.hero-bg-text,
.who-bg-text,
.experience-bg-text {
    display: none;
}

.hero-inner {
    position: relative;
    z-index: 3;

    display: flex;
    flex-direction: column;
    justify-content: center;

    width: 1200px;
    height: calc(100vh - 90px);
    min-height: 630px;

    margin: 0 auto;
}

.eyebrow {
    color: rgba(255, 255, 255, 0.62);

    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.about-title {
    width: 1200px;
    margin-top: 34px;

    font-size: 82px;
    line-height: 1.08;
    font-weight: 850;
    letter-spacing: -0.068em;
    text-align: left;
}

.hero-line {
    display: block;

    width: 100%;

    white-space: nowrap;

    opacity: 0;
    transform: translateY(42px);

    transition:
        opacity 0.65s ease,
        transform 0.65s ease;
}

.hero-line.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes heroBackgroundMove {
    from {
        transform: scale(1.04);
    }

    to {
        transform:
            scale(1.1)
            translateX(-1%);
    }
}

.process-header{
    display:flex;
    justify-content:space-between;
    align-items:flex-end;

    margin-bottom:72px;
}

.process-copy{
    width:700px;
}

.process-image{
    width:360px;
}

.process-image img{
    display:block;
    width:100%;
    height:auto;
}

/* =========================
   COMMON
========================= */

.who-inner,
.experience-inner,
.skills-inner,
.process-inner,
.contact-inner {
    position: relative;
    z-index: 2;

    width: 1200px;
    margin: 0 auto;
}

.section-label {
    display: flex;
    align-items: center;
    gap: 14px;

    color: #65736d;

    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.section-title {
    margin-top: 26px;

    font-size: 78px;
    line-height: 0.96;
    font-weight: 850;
    letter-spacing: -0.065em;
}

/* =========================
   WHO I AM
========================= */

.who-section {
    position: relative;

    padding: 150px 0;
    overflow: hidden;

    background: #ecece7;
}

.who-copy {
    width: 1000px;
    margin-top: 68px;
}

.who-copy p {
    margin-top: 30px;

    font-size: 38px;
    line-height: 1.38;
    font-weight: 750;
    letter-spacing: -0.05em;
}

.who-copy p + p {
    color: rgba(23, 25, 24, 0.58);
}

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

    margin-top: 82px;

    border-top:
        1px solid rgba(23, 25, 24, 0.2);

    border-bottom:
        1px solid rgba(23, 25, 24, 0.2);
}

.keyword-card {
    min-height: 190px;
    padding: 28px;

    border-right:
        1px solid rgba(23, 25, 24, 0.16);

    transition:
        background 0.3s ease,
        padding 0.3s ease;
}

.keyword-card:first-child {
    border-left:
        1px solid rgba(23, 25, 24, 0.16);
}

.keyword-card:hover {
    padding-left: 38px;
    background: rgba(255, 255, 255, 0.38);
}

.keyword-card span {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.045em;
}

.keyword-card p {
    margin-top: 66px;

    color: rgba(23, 25, 24, 0.55);

    font-size: 16px;
}

/* =========================
   EXPERIENCE
========================= */

.experience-section {
    position: relative;

    padding: 150px 0;
    overflow: hidden;

    background: #dadbd5;
}

.vertical-timeline {
    margin-top: 82px;

    border-top:
        1px solid rgba(23, 25, 24, 0.2);
}

.career-item {
    display: grid;
    grid-template-columns: 150px 290px 1fr;
    align-items: center;
    gap: 30px;

    min-height: 112px;

    border-bottom:
        1px solid rgba(23, 25, 24, 0.2);

    opacity: 0;
    transform: translateY(28px);

    transition:
        opacity 0.65s ease,
        transform 0.65s ease,
        background 0.25s ease,
        padding 0.25s ease;
}

.career-item.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.career-item:hover {
    padding: 0 20px;
    background: rgba(255, 255, 255, 0.3);
}

.career-year {
    color: rgba(23, 25, 24, 0.38);

    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.career-title {
    font-size: 24px;
    font-weight: 780;
    letter-spacing: -0.03em;
}

.career-desc {
    color: rgba(23, 25, 24, 0.6);

    font-size: 16px;
    line-height: 1.6;
}

/* =========================
   SKILLS
========================= */

.skills-section {
    position: relative;

    padding: 150px 0;
    overflow: hidden;

    background:
        linear-gradient(
            135deg,
            #68736f 0%,
            #87908b 100%
        );

    color: #fff;
}

.skills-section .section-label {
    color: rgba(255, 255, 255, 0.58);
}

.skills-inner {
    min-height: auto;
}

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

    margin-top: 76px;
}

.skill-card {
    display: grid;
    grid-template-columns: 64px 1fr;
    align-items: center;
    gap: 20px;

    min-height: 150px;
    padding: 24px;

    border:
        1px solid rgba(255, 255, 255, 0.2);

    background: rgba(255, 255, 255, 0.08);

    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);

    transition:
        transform 0.3s ease,
        background 0.3s ease;
}

.skill-card:hover {
    background: rgba(255, 255, 255, 0.14);
    transform: translateY(-6px);
}

.skill-card img {
    width: 54px;
    height: 54px;

    object-fit: contain;
}

.skill-card span {
    color: rgba(255, 255, 255, 0.5);

    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.skill-card h3 {
    margin-top: 8px;

    font-size: 22px;
    font-weight: 780;
    letter-spacing: -0.035em;
}

.skill-card p {
    margin-top: 8px;

    color: rgba(255, 255, 255, 0.62);

    font-size: 13px;
    line-height: 1.5;
}

/* =========================
   PROCESS
========================= */

.process-section {
    position: relative;

    padding: 150px 0;
    overflow: hidden;

    background: #ecece7;
}

.process-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);

    margin-top: 72px;

    border-top:
        1px solid rgba(23, 25, 24, 0.2);

    border-bottom:
        1px solid rgba(23, 25, 24, 0.2);
}

.process-item {
    min-height: 240px;
    padding: 26px;

    border-right:
        1px solid rgba(23, 25, 24, 0.16);

    transition:
        background 0.3s ease,
        transform 0.3s ease;
}

.process-item:first-child {
    border-left:
        1px solid rgba(23, 25, 24, 0.16);
}

.process-item:hover {
    background: rgba(255, 255, 255, 0.42);
    transform: translateY(-5px);
}

.process-item span {
    color: #65736d;

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

.process-item h3 {
    margin-top: 68px;

    font-size: 30px;
    font-weight: 800;
    letter-spacing: -0.045em;
}

.process-item p {
    margin-top: 18px;

    color: rgba(23, 25, 24, 0.58);

    font-size: 15px;
    line-height: 1.55;
}

/* =========================
   CONTACT
========================= */

.contact-section {
    display: flex;
    align-items: center;

    min-height: 88vh;

    background:
        radial-gradient(
            circle at 82% 10%,
            rgba(255, 255, 255, 0.24),
            transparent 30%
        ),
        linear-gradient(
            135deg,
            #65706c,
            #95978f
        );

    color: #fff;
}

.contact-inner p {
    color: rgba(255, 255, 255, 0.58);

    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.12em;
}

.contact-inner h2 {
    margin-top: 26px;

    font-size: 102px;
    line-height: 0.95;
    font-weight: 850;
    letter-spacing: -0.075em;
}

.contact-inner a {
    display: inline-flex;

    margin-top: 48px;
    padding: 16px 24px;

    border:
        1px solid rgba(255, 255, 255, 0.48);

    border-radius: 999px;

    font-size: 16px;
    font-weight: 750;
}

/* =========================
   REVEAL
========================= */

.reveal {
    opacity: 0;
    transform: translateY(28px);

    transition:
        opacity 0.7s ease,
        transform 0.7s ease;
}

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

button:focus-visible,
a:focus-visible {
    outline: 2px solid currentColor;
    outline-offset: 5px;
}

@media (prefers-reduced-motion: reduce) {
    .reveal,
    .hero-line,
    .career-item,
    .skill-card,
    .keyword-card,
    .process-item,
    .hero-visual {
        transition-duration: 0.01ms;
        animation: none;
    }
}