/* ==========================================================================
   DREVV — IBM Carbon Inspired Design System
   ========================================================================== */

/* ---------- Carbon Tokens ---------- */
:root {
    /* Primary */
    --cds-blue-60: #0f62fe;
    --cds-blue-70: #0043ce;
    --cds-blue-80: #002d9c;
    --cds-blue-40: #78a9ff;
    --cds-blue-10: #edf5ff;

    /* Gray scale */
    --cds-gray-100: #161616;
    --cds-gray-90: #262626;
    --cds-gray-80: #393939;
    --cds-gray-70: #525252;
    --cds-gray-60: #6f6f6f;
    --cds-gray-50: #8d8d8d;
    --cds-gray-30: #c6c6c6;
    --cds-gray-20: #e0e0e0;
    --cds-gray-10: #f4f4f4;
    --cds-gray-10-hover: #e8e8e8;
    --cds-white: #ffffff;

    /* Support */
    --cds-support-error: #da1e28;
    --cds-support-success: #24a148;
    --cds-support-warning: #f1c21b;

    /* Semantic */
    --cds-background: var(--cds-white);
    --cds-layer-01: var(--cds-gray-10);
    --cds-layer-02: var(--cds-gray-20);
    --cds-text-primary: var(--cds-gray-100);
    --cds-text-secondary: var(--cds-gray-70);
    --cds-text-helper: var(--cds-gray-60);
    --cds-text-on-color: var(--cds-white);
    --cds-border-subtle: var(--cds-gray-30);
    --cds-border-strong: var(--cds-gray-100);
    --cds-link-primary: var(--cds-blue-60);
    --cds-link-primary-hover: var(--cds-blue-70);
    --cds-button-primary: var(--cds-blue-60);
    --cds-button-primary-hover: #0353e9;
    --cds-button-primary-active: var(--cds-blue-80);
    --cds-focus: var(--cds-blue-60);
    --cds-focus-inset: var(--cds-white);

    /* Spacing — Carbon 8px grid */
    --space-2: 2px;
    --space-4: 4px;
    --space-8: 8px;
    --space-12: 12px;
    --space-16: 16px;
    --space-24: 24px;
    --space-32: 32px;
    --space-48: 48px;
    --space-64: 64px;
    --space-80: 80px;
    --space-96: 96px;
    --space-160: 160px;

    /* Layout */
    --max-content-width: 1584px;
    --container-padding: 16px;
    --container-padding-md: 32px;

    /* Type — Pretendard for body, JetBrains Mono for code/labels */
    --font-sans: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Pretendard Variable', Pretendard, Menlo, Courier, monospace;

    /* Motion */
    --duration-fast: 70ms;
    --duration-moderate: 150ms;
    --duration-slow: 240ms;
    --easing-standard: cubic-bezier(0.2, 0, 0.38, 0.9);
    --easing-entrance: cubic-bezier(0, 0, 0.38, 0.9);
    --easing-exit: cubic-bezier(0.2, 0, 1, 0.9);
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--cds-background);
    color: var(--cds-text-primary);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img,
svg {
    max-width: 100%;
    display: block;
}

a {
    color: var(--cds-link-primary);
    text-decoration: none;
    transition: color var(--duration-fast) var(--easing-standard);
}

a:hover {
    color: var(--cds-link-primary-hover);
    text-decoration: underline;
}

button {
    font-family: inherit;
    cursor: pointer;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

/* ---------- Container ---------- */
.container {
    width: 100%;
    max-width: var(--max-content-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

@media (min-width: 672px) {
    .container {
        padding: 0 var(--container-padding-md);
    }
}

/* ==========================================================================
   Skip Link
   ========================================================================== */
.skip-link {
    position: absolute;
    top: -48px;
    left: 0;
    background: var(--cds-blue-60);
    color: var(--cds-white);
    padding: 12px 16px;
    font-size: 14px;
    letter-spacing: 0.16px;
    z-index: 9999;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
    color: var(--cds-white);
    text-decoration: none;
}

/* ==========================================================================
   Navbar (Masthead)
   ========================================================================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--cds-gray-100);
    color: var(--cds-white);
    height: 48px;
    border-bottom: 1px solid var(--cds-gray-90);
}

.nav-container {
    height: 100%;
    max-width: var(--max-content-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.16px;
    color: var(--cds-white);
    text-decoration: none;
}

.logo:hover {
    color: var(--cds-white);
    text-decoration: none;
}

.logo-bar {
    display: inline-block;
    width: 16px;
    height: 16px;
    background: var(--cds-blue-60);
}

.logo-text {
    color: var(--cds-white);
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    align-items: center;
    height: 100%;
    gap: 0;
}

.nav-menu li {
    height: 100%;
}

.nav-link {
    height: 100%;
    display: inline-flex;
    align-items: center;
    padding: 0 16px;
    color: var(--cds-gray-30);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.16px;
    transition: background var(--duration-fast) var(--easing-standard),
                color var(--duration-fast) var(--easing-standard);
    border-bottom: 2px solid transparent;
    text-decoration: none;
}

.nav-link:hover {
    background: var(--cds-gray-90);
    color: var(--cds-white);
    text-decoration: none;
}

.nav-link.is-active {
    color: var(--cds-white);
    border-bottom-color: var(--cds-blue-60);
}

.nav-link.cta {
    background: var(--cds-blue-60);
    color: var(--cds-white);
    padding: 0 16px;
}

.nav-link.cta:hover {
    background: var(--cds-button-primary-hover);
}

.mobile-menu-toggle {
    display: none;
    width: 48px;
    height: 48px;
    background: transparent;
    border: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--cds-white);
    transition: transform var(--duration-moderate) var(--easing-standard),
                opacity var(--duration-moderate) var(--easing-standard);
}

@media (max-width: 1055px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 48px;
        right: 0;
        bottom: 0;
        width: 280px;
        background: var(--cds-gray-100);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        transform: translateX(100%);
        transition: transform var(--duration-slow) var(--easing-standard);
        border-left: 1px solid var(--cds-gray-90);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-menu li {
        height: auto;
    }

    .nav-link {
        height: 48px;
        padding: 0 16px;
        border-bottom: 1px solid var(--cds-gray-90);
    }

    .nav-link.cta {
        margin: 16px;
        height: 48px;
        border-bottom: none;
    }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
    background: var(--cds-white);
    padding: 96px var(--container-padding) 80px;
    border-bottom: 1px solid var(--cds-gray-20);
}

.hero-inner {
    max-width: var(--max-content-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    align-items: end;
}

.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.16px;
    color: var(--cds-blue-60);
    margin-bottom: 24px;
    display: inline-block;
}

.hero-eyebrow::before {
    content: '/ ';
    color: var(--cds-gray-60);
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3.75rem);
    font-weight: 300;
    line-height: 1.17;
    color: var(--cds-text-primary);
    margin: 0 0 32px;
    max-width: 18ch;
}

.hero-title .accent {
    color: var(--cds-blue-60);
}

.hero-subtitle {
    font-size: 1rem;
    line-height: 1.5;
    color: var(--cds-text-secondary);
    max-width: 56ch;
    margin: 0 0 48px;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 1px;
}

@media (min-width: 1056px) {
    .hero {
        padding: 128px var(--container-padding-md) 96px;
    }

    .hero-inner {
        grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    }
}

/* Hero meta panel */
.hero-meta {
    background: var(--cds-gray-10);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    border-left: 1px solid var(--cds-gray-30);
}

.hero-meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.hero-meta-label {
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-text-secondary);
    text-transform: uppercase;
}

.hero-meta-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--cds-text-primary);
}

/* ==========================================================================
   Buttons (Carbon)
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 48px;
    min-width: 200px;
    padding: 14px 63px 14px 15px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.16px;
    line-height: 1.25;
    border: 1px solid transparent;
    border-radius: 0;
    cursor: pointer;
    text-decoration: none;
    transition: background var(--duration-fast) var(--easing-standard),
                border-color var(--duration-fast) var(--easing-standard),
                color var(--duration-fast) var(--easing-standard);
    position: relative;
}

.btn:hover {
    text-decoration: none;
}

.btn:focus-visible {
    outline: 2px solid var(--cds-focus);
    outline-offset: -4px;
    box-shadow: inset 0 0 0 1px var(--cds-focus-inset);
}

.btn .btn-icon {
    display: inline-block;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.btn--primary {
    background: var(--cds-button-primary);
    color: var(--cds-white);
}

.btn--primary:hover {
    background: var(--cds-button-primary-hover);
    color: var(--cds-white);
}

.btn--primary:active {
    background: var(--cds-button-primary-active);
}

.btn--secondary {
    background: var(--cds-gray-80);
    color: var(--cds-white);
}

.btn--secondary:hover {
    background: var(--cds-gray-70);
    color: var(--cds-white);
}

.btn--tertiary {
    background: transparent;
    color: var(--cds-blue-60);
    border-color: var(--cds-blue-60);
}

.btn--tertiary:hover {
    background: var(--cds-blue-60);
    color: var(--cds-white);
}

.btn--ghost {
    background: transparent;
    color: var(--cds-blue-60);
    padding: 14px 16px;
    justify-content: flex-start;
    gap: 8px;
    min-width: auto;
}

.btn--ghost:hover {
    background: var(--cds-gray-10-hover);
    color: var(--cds-link-primary-hover);
}

.btn[disabled],
.btn[aria-disabled="true"] {
    background: var(--cds-gray-30);
    color: var(--cds-gray-60);
    cursor: not-allowed;
    border-color: transparent;
}

/* ==========================================================================
   Section Header
   ========================================================================== */
.section {
    padding: 96px 0;
    background: var(--cds-white);
}

.section--alt {
    background: var(--cds-gray-10);
}

.section--dark {
    background: var(--cds-gray-100);
    color: var(--cds-white);
}

.section-header {
    margin-bottom: 64px;
    max-width: 720px;
}

.section-eyebrow {
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.16px;
    color: var(--cds-blue-60);
    display: block;
    margin-bottom: 16px;
}

.section--dark .section-eyebrow {
    color: var(--cds-blue-40);
}

.section-eyebrow::before {
    content: '/ ';
    color: var(--cds-gray-60);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.625rem);
    font-weight: 300;
    line-height: 1.19;
    letter-spacing: 0;
    color: inherit;
    margin: 0 0 24px;
}

.section-subtitle {
    font-size: 1rem;
    line-height: 1.5;
    color: var(--cds-text-secondary);
    margin: 0;
}

.section--dark .section-subtitle {
    color: var(--cds-gray-30);
}

@media (max-width: 671px) {
    .section {
        padding: 64px 0;
    }

    .section-header {
        margin-bottom: 48px;
    }
}

/* ==========================================================================
   Capabilities (Tile Grid)
   ========================================================================== */
.tile-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1px;
    background: var(--cds-gray-20);
}

.tile-grid > .tile {
    background: var(--cds-white);
}

.section--alt .tile-grid > .tile {
    background: var(--cds-gray-10);
}

.tile {
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    border-radius: 0;
    transition: background var(--duration-moderate) var(--easing-standard);
    position: relative;
    min-height: 320px;
}

.tile-num {
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.16px;
    color: var(--cds-gray-60);
}

.tile-title {
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1.33;
    color: var(--cds-text-primary);
    margin: 0;
}

.tile-desc {
    font-size: 0.875rem;
    line-height: 1.43;
    letter-spacing: 0.16px;
    color: var(--cds-text-secondary);
    margin: 0;
    flex-grow: 1;
}

.tile-features {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 8px;
}

.tile-features li {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-text-secondary);
    padding: 4px 8px;
    background: var(--cds-white);
    border: 1px solid var(--cds-gray-20);
}

.section--alt .tile-features li {
    background: var(--cds-white);
}

.tile-arrow {
    position: absolute;
    bottom: 16px;
    right: 16px;
    width: 20px;
    height: 20px;
    color: var(--cds-blue-60);
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity var(--duration-moderate) var(--easing-standard),
                transform var(--duration-moderate) var(--easing-standard);
}

.tile:hover .tile-arrow {
    opacity: 1;
    transform: translateX(0);
}

@media (min-width: 672px) {
    .tile-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1056px) {
    .tile-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .tile {
        padding: 40px 24px;
    }
}

/* ==========================================================================
   Strengths (3 column highlights)
   ========================================================================== */
.strengths-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
}

.strength-item {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--cds-border-strong);
}

.section--dark .strength-item {
    border-top-color: var(--cds-white);
}

.strength-num {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-blue-60);
}

.section--dark .strength-num {
    color: var(--cds-blue-40);
}

.strength-title {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    margin: 0;
    color: inherit;
}

.strength-desc {
    font-size: 0.875rem;
    line-height: 1.43;
    letter-spacing: 0.16px;
    color: var(--cds-text-secondary);
    margin: 0;
}

.section--dark .strength-desc {
    color: var(--cds-gray-30);
}

@media (min-width: 672px) {
    .strengths-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
    }
}

/* ==========================================================================
   Tech Stack
   ========================================================================== */
.tech-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1px;
    background: var(--cds-gray-20);
}

.tech-category {
    background: var(--cds-white);
    padding: 32px 24px;
}

.section--alt .tech-category {
    background: var(--cds-gray-10);
}

.tech-category-title {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-text-secondary);
    margin: 0 0 24px;
    text-transform: uppercase;
}

.tech-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tech-item {
    font-size: 1rem;
    color: var(--cds-text-primary);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--cds-gray-20);
}

.tech-item:last-child {
    border-bottom: none;
}

@media (min-width: 672px) {
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1056px) {
    .tech-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ==========================================================================
   Portfolio Placeholder
   ========================================================================== */
/* Portfolio — Dribbble-style grid (큰 여백, 박스 없음) */
.portfolio-grid {
    display: grid;
    grid-template-columns: 1fr;
    column-gap: 32px;
    row-gap: 64px;
}

.portfolio-card {
    background: transparent !important;
    display: block;
    text-decoration: none;
    color: inherit;
    transition: transform var(--duration-moderate) var(--easing-standard);
    cursor: pointer;
}
.portfolio-card:hover { background: transparent !important; }
.portfolio-card:hover .portfolio-thumb { transform: translateY(-4px); }

.portfolio-thumb {
    width: 100%;
    aspect-ratio: 16 / 10;
    background-color: var(--cds-gray-10);
    background-size: cover;
    background-position: top center;
    background-repeat: no-repeat;
    border: 1px solid var(--cds-gray-20);
    transition: transform var(--duration-moderate) var(--easing-standard),
                box-shadow var(--duration-moderate) var(--easing-standard);
    margin-bottom: 16px;
}
.portfolio-card:hover .portfolio-thumb {
    box-shadow: 0 16px 36px -16px rgba(22,22,22,0.18);
}

.portfolio-title {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
    margin: 0 0 6px;
    color: var(--cds-text-primary);
    letter-spacing: -0.01em;
}

.portfolio-meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.portfolio-tag {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.16px;
    color: var(--cds-text-secondary);
    background: transparent;
    border-radius: 0;
    padding: 0;
}
.portfolio-tag + .portfolio-tag::before {
    content: "·";
    margin-right: 12px;
    color: var(--cds-gray-30);
}

/* "더보기" CTA — 그리드 하단 중앙 */
.portfolio-more {
    display: flex;
    justify-content: center;
    margin-top: 80px;
}
.portfolio-more-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    border: 1px solid var(--cds-gray-100);
    color: var(--cds-text-primary);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.16px;
    transition: background var(--duration-moderate) var(--easing-standard),
                color var(--duration-moderate) var(--easing-standard);
    text-decoration: none;
}
.portfolio-more-link:hover {
    background: var(--cds-gray-100);
    color: var(--cds-white);
}
.portfolio-more-link .arrow {
    transition: transform var(--duration-moderate) var(--easing-standard);
}
.portfolio-more-link:hover .arrow {
    transform: translateX(4px);
}

@media (min-width: 672px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 72px;
    }
}

@media (min-width: 1056px) {
    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
        column-gap: 48px;
        row-gap: 80px;
    }
}

/* ──────────────────────────────────────
   /portfolio.html 전용 — 카테고리 필터 + 4컬럼 그리드
   ────────────────────────────────────── */
.portfolio-page-header {
    padding: 96px 0 48px;
}
.portfolio-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    max-width: 820px;
    margin: 32px auto 64px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--cds-gray-20);
}
.portfolio-filter-btn {
    background: transparent;
    border: 1px solid var(--cds-gray-30);
    padding: 8px 18px;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 500;
    color: var(--cds-text-secondary);
    cursor: pointer;
    transition: background var(--duration-moderate) var(--easing-standard),
                color var(--duration-moderate) var(--easing-standard),
                border-color var(--duration-moderate) var(--easing-standard);
    border-radius: 999px;
}
.portfolio-filter-btn:hover {
    border-color: var(--cds-gray-100);
    color: var(--cds-text-primary);
}
.portfolio-filter-btn.is-active {
    background: var(--cds-gray-100);
    color: var(--cds-white);
    border-color: var(--cds-gray-100);
}
.portfolio-card.is-hidden { display: none; }

@media (min-width: 1056px) {
    .portfolio-grid--full {
        grid-template-columns: repeat(4, 1fr);
        column-gap: 40px;
        row-gap: 72px;
    }
}

/* ==========================================================================
   About / Stats
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    align-items: start;
}

.about-text p {
    font-size: 1rem;
    line-height: 1.5;
    color: var(--cds-text-secondary);
    margin: 0 0 24px;
    max-width: 56ch;
}

.about-text .accent {
    color: var(--cds-text-primary);
    font-weight: 600;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--cds-gray-20);
    margin-top: 32px;
}

.stat-item {
    background: var(--cds-white);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.section--alt .stat-item {
    background: var(--cds-gray-10);
}

.stat-number {
    font-size: 2rem;
    font-weight: 300;
    line-height: 1.25;
    color: var(--cds-text-primary);
}

.stat-label {
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-text-secondary);
}

.code-window {
    background: var(--cds-gray-100);
    color: var(--cds-gray-10);
    border: 1px solid var(--cds-gray-90);
}

.code-header {
    background: var(--cds-gray-90);
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--cds-gray-80);
}

.code-dot {
    width: 8px;
    height: 8px;
    background: var(--cds-gray-60);
    border-radius: 50%;
    display: inline-block;
}

.code-title {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-gray-30);
    margin-left: 8px;
}

.code-content {
    padding: 24px;
    margin: 0;
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.43;
    letter-spacing: 0.16px;
    overflow-x: auto;
    color: var(--cds-gray-10);
}

.code-keyword { color: var(--cds-blue-40); }
.code-string { color: #42be65; }
.code-property { color: #be95ff; }
.code-value { color: #ee5396; }
.code-method { color: #82cfff; }
.code-variable { color: var(--cds-white); }
.code-comment { color: var(--cds-gray-60); }

@media (min-width: 1056px) {
    .about-grid {
        grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
        gap: 48px;
    }
}

/* ==========================================================================
   Contact Form (Carbon Bottom-Border Inputs)
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    border-top: 1px solid var(--cds-border-strong);
    padding-top: 24px;
}

.contact-info dl {
    margin: 0;
    display: grid;
    gap: 24px;
}

.contact-info dt {
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-text-secondary);
    margin-bottom: 4px;
    text-transform: uppercase;
}

.contact-info dd {
    margin: 0;
    font-size: 1rem;
    color: var(--cds-text-primary);
}

.contact-info dd a {
    color: var(--cds-blue-60);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 672px) {
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: relative;
}

.form-label {
    font-size: 12px;
    line-height: 1.33;
    letter-spacing: 0.32px;
    color: var(--cds-text-secondary);
    margin-bottom: 4px;
}

.form-input {
    width: 100%;
    height: 40px;
    padding: 0 16px;
    background: var(--cds-gray-10);
    color: var(--cds-text-primary);
    font-family: var(--font-sans);
    font-size: 14px;
    letter-spacing: 0.16px;
    line-height: 1.29;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    transition: border-color var(--duration-fast) var(--easing-standard),
                background var(--duration-fast) var(--easing-standard);
    outline: none;
}

.form-input:hover {
    background: var(--cds-gray-10-hover);
}

.form-input:focus {
    border-bottom-color: var(--cds-blue-60);
    background: var(--cds-gray-10);
    outline: none;
}

textarea.form-input {
    height: auto;
    padding: 12px 16px;
    resize: vertical;
    min-height: 120px;
    line-height: 1.43;
}

select.form-input {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23161616'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    padding-right: 40px;
}

.form-input::placeholder {
    color: var(--cds-text-helper);
}

.form-helper {
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-text-helper);
    margin-top: 4px;
}

.submit-button {
    align-self: flex-start;
    background: var(--cds-button-primary);
    color: var(--cds-white);
    border: 1px solid transparent;
    border-radius: 0;
    padding: 14px 63px 14px 15px;
    min-width: 240px;
    min-height: 48px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.16px;
    line-height: 1.25;
    cursor: pointer;
    transition: background var(--duration-fast) var(--easing-standard);
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    text-align: left;
}

.submit-button:hover {
    background: var(--cds-button-primary-hover);
}

.submit-button:active {
    background: var(--cds-button-primary-active);
}

.submit-button:focus-visible {
    outline: 2px solid var(--cds-focus);
    outline-offset: -4px;
    box-shadow: inset 0 0 0 1px var(--cds-focus-inset);
}

.submit-button[disabled] {
    background: var(--cds-gray-30);
    color: var(--cds-gray-60);
    cursor: not-allowed;
}

.submit-button .button-arrow {
    font-size: 16px;
    line-height: 1;
}

@media (min-width: 1056px) {
    .contact-grid {
        grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
        gap: 64px;
    }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background: var(--cds-gray-100);
    color: var(--cds-gray-30);
    padding: 80px 0 32px;
}

.footer .container {
    padding: 0 var(--container-padding-md);
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--cds-gray-90);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--cds-white);
    font-weight: 600;
    font-size: 16px;
    letter-spacing: 0.16px;
}

.footer-tagline {
    font-size: 14px;
    line-height: 1.43;
    letter-spacing: 0.16px;
    color: var(--cds-gray-30);
    margin: 0;
    max-width: 36ch;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-gray-50);
    margin: 0 0 16px;
    text-transform: uppercase;
    font-weight: 400;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-column a {
    color: var(--cds-gray-30);
    font-size: 14px;
    letter-spacing: 0.16px;
    text-decoration: none;
    transition: color var(--duration-fast) var(--easing-standard);
}

.footer-column a:hover {
    color: var(--cds-white);
    text-decoration: none;
}

.footer-info {
    padding: 32px 0;
    border-bottom: 1px solid var(--cds-gray-90);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-info-row {
    font-size: 12px;
    line-height: 1.5;
    letter-spacing: 0.32px;
    color: var(--cds-gray-50);
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-info-row strong {
    color: var(--cds-gray-30);
    font-weight: 600;
    margin-right: 4px;
}

.footer-info-row .info-separator {
    color: var(--cds-gray-80);
}

.footer-info-row a {
    color: var(--cds-gray-30);
}

.footer-info-row a:hover {
    color: var(--cds-white);
}

.footer-bottom {
    padding-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    justify-content: space-between;
    align-items: flex-start;
}

.footer-bottom-left p {
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-gray-50);
    margin: 0;
}

.footer-bottom-right {
    display: flex;
    gap: 16px;
    align-items: center;
}

.footer-bottom-right .footer-link {
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-gray-30);
}

.footer-bottom-right .footer-link:hover {
    color: var(--cds-white);
    text-decoration: none;
}

.footer-bottom-right .footer-separator {
    color: var(--cds-gray-80);
}

@media (min-width: 672px) {
    .footer-top {
        grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    }

    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-bottom {
        flex-direction: row;
        align-items: center;
    }
}

/* ==========================================================================
   Notification (Inline Banner Style)
   ========================================================================== */
.notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    max-width: 480px;
    padding: 16px 24px;
    background: var(--cds-gray-100);
    color: var(--cds-white);
    font-size: 14px;
    letter-spacing: 0.16px;
    line-height: 1.43;
    z-index: 10001;
    border-left: 3px solid var(--cds-blue-60);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    animation: slideIn var(--duration-slow) var(--easing-entrance);
}

.notification--success {
    border-left-color: var(--cds-support-success);
}

.notification--error {
    border-left-color: var(--cds-support-error);
}

@keyframes slideIn {
    from { transform: translateX(120%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(120%); opacity: 0; }
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.is-hidden {
    display: none !important;
}

.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity var(--duration-slow) var(--easing-entrance),
                transform var(--duration-slow) var(--easing-entrance);
}

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

/* ==========================================================================
   8-bar Logo Mark (IBM-inspired)
   ========================================================================== */
.logo-mark {
    display: inline-grid;
    grid-template-rows: repeat(8, 1fr);
    width: 24px;
    height: 24px;
    gap: 1px;
    flex-shrink: 0;
}

.logo-mark span {
    display: block;
    width: 100%;
    background: var(--cds-blue-60);
}

.logo-mark span:nth-child(odd) {
    background: var(--cds-blue-60);
}

.logo-mark span:nth-child(even) {
    background: transparent;
}

.footer-logo .logo-mark span {
    background: var(--cds-white);
}

.footer-logo .logo-mark span:nth-child(even) {
    background: transparent;
}

/* ==========================================================================
   Hero Enhancements
   ========================================================================== */
.hero {
    position: relative;
    overflow: hidden;
}

/* Subtle dot grid background for hero */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 50%;
    background-image: radial-gradient(circle, var(--cds-gray-20) 1px, transparent 1px);
    background-size: 24px 24px;
    background-position: 0 0;
    opacity: 0.55;
    pointer-events: none;
    mask-image: linear-gradient(to right, transparent, black 30%, black 100%);
    -webkit-mask-image: linear-gradient(to right, transparent, black 30%, black 100%);
}

.hero-inner {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px 4px 8px;
    background: var(--cds-blue-10);
    color: var(--cds-blue-70);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32px;
    margin-bottom: 24px;
    border-radius: 24px;
    text-transform: uppercase;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--cds-blue-60);
    display: inline-block;
    position: relative;
}

.hero-badge .dot::after {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 2px solid var(--cds-blue-60);
    animation: pulseRing 2s ease-out infinite;
}

@keyframes pulseRing {
    0% { transform: scale(0.6); opacity: 1; }
    100% { transform: scale(1.6); opacity: 0; }
}

.hero-title {
    font-weight: 300;
    max-width: 18ch;
}

@media (min-width: 1056px) {
    .hero-title {
        font-size: 4.5rem;
        line-height: 1.1;
    }
}

/* Hero scroll indicator */
.hero-scroll {
    margin-top: 48px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-text-secondary);
    text-transform: uppercase;
}

.hero-scroll-line {
    width: 56px;
    height: 1px;
    background: var(--cds-gray-30);
    position: relative;
    overflow: hidden;
}

.hero-scroll-line::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--cds-blue-60);
    transform: translateX(-100%);
    animation: scrollLine 2.4s var(--easing-standard) infinite;
}

@keyframes scrollLine {
    0% { transform: translateX(-100%); }
    50% { transform: translateX(0); }
    100% { transform: translateX(100%); }
}

/* Hero meta — circular indicators */
.hero-meta {
    background: var(--cds-gray-100);
    color: var(--cds-white);
    border-left: none;
    padding: 32px 24px;
    position: relative;
}

.hero-meta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 32px;
    background: var(--cds-blue-60);
}

.hero-meta-label {
    color: var(--cds-blue-40);
    font-family: var(--font-mono);
}

.hero-meta-value {
    color: var(--cds-white);
    font-weight: 400;
}

.hero-meta-item {
    padding-bottom: 12px;
    border-bottom: 1px solid var(--cds-gray-90);
}

.hero-meta-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

/* ==========================================================================
   Metric Ticker (under hero)
   ========================================================================== */
.metric-ticker {
    background: var(--cds-gray-100);
    color: var(--cds-white);
    border-top: 1px solid var(--cds-gray-90);
    border-bottom: 1px solid var(--cds-gray-90);
    overflow: hidden;
    position: relative;
}

.metric-ticker::before,
.metric-ticker::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 80px;
    z-index: 2;
    pointer-events: none;
}

.metric-ticker::before {
    left: 0;
    background: linear-gradient(to right, var(--cds-gray-100), transparent);
}

.metric-ticker::after {
    right: 0;
    background: linear-gradient(to left, var(--cds-gray-100), transparent);
}

.metric-track {
    display: flex;
    gap: 64px;
    padding: 20px 0;
    animation: tickerScroll 32s linear infinite;
    width: max-content;
}

@keyframes tickerScroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

.metric-item {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.16px;
    color: var(--cds-gray-30);
    white-space: nowrap;
}

.metric-item .bullet {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--cds-blue-60);
    flex-shrink: 0;
}

.metric-item strong {
    color: var(--cds-white);
    font-weight: 400;
}

/* ==========================================================================
   Decorative Big Numerals in Section Headers
   ========================================================================== */
.section-header {
    position: relative;
}

.section-bignum {
    position: absolute;
    top: -32px;
    right: 0;
    font-family: var(--font-mono);
    font-size: clamp(6rem, 14vw, 12rem);
    font-weight: 300;
    line-height: 1;
    color: var(--cds-gray-20);
    letter-spacing: -0.04em;
    pointer-events: none;
    user-select: none;
    z-index: 0;
}

.section--alt .section-bignum {
    color: var(--cds-gray-30);
    opacity: 0.5;
}

.section--dark .section-bignum {
    color: var(--cds-gray-90);
}

.section-header > *:not(.section-bignum) {
    position: relative;
    z-index: 1;
}

@media (max-width: 671px) {
    .section-bignum {
        font-size: 5rem;
        top: -16px;
        opacity: 0.5;
    }
}

/* ==========================================================================
   Tile Enhancements — Circular Icon Container + Number Plate
   ========================================================================== */
.tile {
    padding: 48px 24px 32px;
}

.tile-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--cds-blue-10);
    color: var(--cds-blue-60);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    flex-shrink: 0;
}

.tile-icon svg {
    width: 28px;
    height: 28px;
}

.tile-num {
    position: absolute;
    top: 16px;
    right: 16px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-gray-50);
}

.tile-arrow {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--cds-blue-60);
    color: var(--cds-white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    line-height: 1;
}

/* ==========================================================================
   Process Steps (Why DREVV — circular numbered nodes)
   ========================================================================== */
.process {
    margin-top: 64px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    position: relative;
}

.process-step {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 24px;
    align-items: start;
    position: relative;
}

.process-step::before {
    content: '';
    position: absolute;
    left: 27px;
    top: 56px;
    bottom: -32px;
    width: 1px;
    background: var(--cds-gray-80);
}

.process-step:last-child::before {
    display: none;
}

.process-node {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--cds-gray-100);
    border: 1px solid var(--cds-gray-80);
    color: var(--cds-blue-40);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.16px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.process-step.is-active .process-node {
    background: var(--cds-blue-60);
    color: var(--cds-white);
    border-color: var(--cds-blue-60);
}

.process-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 4px;
    color: var(--cds-white);
    line-height: 1.4;
}

.process-content p {
    font-size: 14px;
    line-height: 1.5;
    letter-spacing: 0.16px;
    color: var(--cds-gray-30);
    margin: 0;
}

.process-content time {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-blue-40);
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 4px;
}

@media (min-width: 672px) {
    .process {
        grid-template-columns: repeat(4, 1fr);
        gap: 32px;
    }

    .process-step {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .process-step::before {
        top: 27px;
        left: 56px;
        right: -32px;
        bottom: auto;
        width: auto;
        height: 1px;
    }

    .process-step:last-child::before {
        display: none;
    }
}

/* ==========================================================================
   Strength Items — circular accents
   ========================================================================== */
.strength-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--cds-blue-40);
    color: var(--cds-blue-40);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0;
    margin-bottom: 8px;
}

.section--dark .strength-num {
    color: var(--cds-blue-40);
    border-color: var(--cds-blue-40);
}

.strength-item {
    border-top: 2px solid var(--cds-blue-40);
}

.section--dark .strength-item {
    border-top-color: var(--cds-blue-40);
}

/* ==========================================================================
   Tech Category — accent bar
   ========================================================================== */
.tech-category {
    position: relative;
    padding-top: 40px;
}

.tech-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 24px;
    right: 24px;
    height: 2px;
    background: var(--cds-blue-60);
}

.tech-category-title {
    color: var(--cds-text-primary);
    font-weight: 600;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.tech-item::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--cds-blue-60);
    flex-shrink: 0;
}

/* (legacy portfolio enhancements 제거됨 — Dribbble 톤 그리드로 통일) */

/* ==========================================================================
   Section Eyebrow — leading dot
   ========================================================================== */
.section-eyebrow,
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.section-eyebrow::before,
.hero-eyebrow::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--cds-blue-60);
    flex-shrink: 0;
}

.section--dark .section-eyebrow::before {
    background: var(--cds-blue-40);
}

/* ==========================================================================
   Stat Item — accent bar on top
   ========================================================================== */
.stat-item {
    position: relative;
    padding-top: 32px;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 16px;
    right: 16px;
    height: 1px;
    background: var(--cds-gray-30);
}

.stat-item:hover::before {
    background: var(--cds-blue-60);
}

.stat-number {
    font-family: var(--font-mono);
    font-weight: 300;
    font-size: 2.5rem;
    color: var(--cds-blue-60);
    letter-spacing: -0.02em;
}

/* ==========================================================================
   Stronger Korean Typography
   ========================================================================== */
:lang(ko) .hero-title,
.hero-title {
    font-weight: 300;
    word-break: keep-all;
}

.section-title {
    word-break: keep-all;
}

.tile-title,
.portfolio-title,
.strength-title,
.process-content h4 {
    word-break: keep-all;
}

/* Slight weight bump for Korean body to match Latin visual weight */
p, .tile-desc, .portfolio-desc, .strength-desc, .section-subtitle, .hero-subtitle {
    font-weight: 400;
}

/* ==========================================================================
   Submit button — circular arrow
   ========================================================================== */
.submit-button .button-arrow {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--cds-white);
    color: var(--cds-blue-60);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
    transition: transform var(--duration-fast) var(--easing-standard);
}

.submit-button:hover .button-arrow {
    transform: translateX(2px);
}

/* ==========================================================================
   Trust strip (logos placeholder row)
   ========================================================================== */
.trust-strip {
    background: var(--cds-white);
    border-top: 1px solid var(--cds-gray-20);
    border-bottom: 1px solid var(--cds-gray-20);
    padding: 32px 0;
}

.trust-strip-inner {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: space-between;
}

.trust-strip-label {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32px;
    color: var(--cds-text-secondary);
    text-transform: uppercase;
    flex-shrink: 0;
}

.trust-strip-items {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    align-items: center;
}

.trust-item {
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.16px;
    color: var(--cds-gray-60);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.trust-item::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--cds-gray-30);
}