:root {
    --bg: #f4f7fb;
    --text: #172033;
    --muted: #596579;
    --line: #d8e0eb;
    --primary: #1559d6;
    --primary-dark: #0f3f9e;
    --accent: #d97706;
    --white: #ffffff;
    --shadow: 0 18px 45px rgba(15, 23, 42, 0.10);
    --radius: 14px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Helvetica Neue", "Yu Gothic", "Meiryo", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}

body.intro-active {
    overflow: hidden;
}

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

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 100;
    padding: 10px 16px;
    border-radius: 8px;
    background: var(--white);
    color: var(--primary-dark);
    font-weight: 800;
    transform: translateY(-160%);
}

.skip-link:focus {
    transform: translateY(0);
}

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

:focus-visible {
    outline: 3px solid #f59e0b;
    outline-offset: 4px;
}

.hero {
    position: relative;
    min-height: 88vh;
    overflow: hidden;
    padding: 28px 6vw 80px;
    background: #081329;
    color: var(--white);
}

.hero::before,
.hero::after {
    content: "";
    position: absolute;
    inset: 0;
}

.hero::before {
    background: url("../images/back.png") center/cover no-repeat;
    transform: scale(1.08);
    animation: hero-image-in 1.8s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both;
}

.hero::after {
    background: linear-gradient(105deg, rgba(8, 19, 41, 0.96) 0%, rgba(14, 42, 91, 0.82) 55%, rgba(128, 61, 8, 0.48) 100%);
}

.nav {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    max-width: 1120px;
    margin: 0 auto;
}

.logo {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: 0;
}

.nav ul {
    display: flex;
    gap: 22px;
    list-style: none;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav a {
    font-weight: 700;
}

.nav li a {
    font-size: 0.92rem;
    opacity: 0.9;
}

.nav li a:hover {
    opacity: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 880px;
    margin: 135px auto 0;
}

.label {
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.hero .label {
    color: #fbbf24;
}

h1 {
    font-size: clamp(3rem, 8vw, 5.8rem);
    line-height: 1.05;
    letter-spacing: 0;
    margin-bottom: 24px;
}

.lead {
    max-width: 680px;
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.9);
}

.typewriter {
    min-height: 5.4em;
}

.typewriter-visual {
    white-space: pre-wrap;
}

.typewriter-visual::after {
    content: "";
    display: inline-block;
    width: 2px;
    height: 1.08em;
    margin-left: 4px;
    background: #fbbf24;
    vertical-align: -0.14em;
    animation: typewriter-cursor 0.72s step-end infinite;
}

.typewriter-visual.is-complete::after {
    animation-iteration-count: 5;
}

.page-intro {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: grid;
    place-items: center;
    overflow: hidden;
    background: #081329;
    color: var(--white);
    pointer-events: none;
    animation: intro-curtain 0.78s cubic-bezier(0.76, 0, 0.24, 1) 0.62s forwards;
}

.skip-intro .page-intro {
    display: none;
}

.page-intro::before,
.page-intro::after {
    content: "";
    position: absolute;
    width: 46vw;
    height: 1px;
    background: rgba(255, 255, 255, 0.12);
}

.page-intro::before {
    top: 25%;
    left: -8vw;
    transform: rotate(28deg);
}

.page-intro::after {
    right: -8vw;
    bottom: 25%;
    transform: rotate(-28deg);
}

.page-intro-wordmark {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
}

.page-intro-wordmark span {
    margin-bottom: 8px;
    color: #fbbf24;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.42em;
    animation: intro-label-in 0.45s ease-out both;
}

.page-intro-wordmark strong {
    font-size: clamp(2.2rem, 7vw, 5.8rem);
    letter-spacing: 0.02em;
    animation: intro-title-in 0.55s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.page-intro-wordmark i {
    width: 0;
    height: 3px;
    margin-top: 18px;
    background: #fbbf24;
    animation: intro-line-in 0.48s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
}

.motion-ready .hero .nav,
.motion-ready .hero-content > .label,
.motion-ready .hero-content > h1,
.motion-ready .hero-content > .lead,
.motion-ready .hero-content > .hero-actions {
    opacity: 0;
    transform: translateY(22px);
    animation: hero-copy-in 0.62s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.motion-ready .hero .nav {
    animation-delay: 0.9s;
}

.motion-ready .hero-content > .label {
    animation-delay: 1.02s;
}

.motion-ready .hero-content > h1 {
    animation-delay: 1.12s;
}

.motion-ready .hero-content > .lead {
    animation-delay: 1.24s;
}

.motion-ready .hero-content > .hero-actions {
    animation-delay: 1.36s;
}

.motion-ready .reveal-target {
    opacity: 0;
    transform: translateY(28px);
    transition:
        opacity 0.48s ease-out var(--reveal-delay, 0ms),
        transform 0.48s cubic-bezier(0.16, 1, 0.3, 1) var(--reveal-delay, 0ms);
    will-change: opacity, transform;
}

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

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 34px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 22px;
    border-radius: 8px;
    font-weight: 800;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.primary {
    background: var(--white);
    color: var(--primary-dark);
    box-shadow: var(--shadow);
}

.secondary {
    border: 1px solid rgba(255, 255, 255, 0.65);
    color: var(--white);
}

main {
    max-width: 1120px;
    margin: 0 auto;
    padding: 88px 6vw 48px;
}

.section {
    margin-bottom: 110px;
}

.two-column {
    display: grid;
    grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
    gap: 56px;
    align-items: start;
}

h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    line-height: 1.25;
    margin-bottom: 22px;
}

.section-intro {
    max-width: 28rem;
    font-size: 0.98rem;
}

.content p,
.section > p {
    color: var(--muted);
    margin-bottom: 14px;
}

.skill-grid,
.work-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.skill-card,
.work-card,
.highlight-box {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

.skill-card {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 20px;
}

.skill-card span {
    font-weight: 800;
}

.skill-card strong {
    color: var(--primary);
    white-space: nowrap;
}

.work-card {
    display: flex;
    min-height: 260px;
    flex-direction: column;
    align-items: flex-start;
    padding: 26px;
    border-top: 5px solid var(--primary);
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.work-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

.work-tag {
    display: inline-block;
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.work-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.work-card > p:not(.work-tag) {
    color: var(--muted);
}

.work-card-action {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: auto;
    padding-top: 24px;
    color: var(--primary-dark);
    font-size: 0.88rem;
    font-weight: 800;
}

.highlight-box {
    padding: 28px;
}

.experience-menu {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.experience-option {
    display: flex;
    min-height: 210px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: space-between;
    padding: 26px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.07);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.experience-option:hover {
    transform: translateY(-4px);
    border-color: rgba(21, 89, 214, 0.45);
    box-shadow: var(--shadow);
}

.experience-option-label {
    color: var(--primary);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.experience-option strong {
    font-size: clamp(1.35rem, 2.4vw, 1.75rem);
    line-height: 1.4;
}

.experience-option-action {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 700;
}

.body-contest-option {
    border-top: 5px solid var(--accent);
}

.business-option {
    border-top: 5px solid var(--primary);
}

.detail-page {
    min-height: 100vh;
    background: var(--bg);
}

.detail-header {
    padding: 24px 6vw;
    border-bottom: 1px solid var(--line);
    background: var(--white);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-dark);
    font-weight: 800;
}

.detail-main {
    width: min(880px, calc(100% - 40px));
    margin: 0 auto;
    padding: clamp(72px, 12vw, 140px) 0;
}

.detail-main h1 {
    margin-bottom: 16px;
    color: var(--text);
    font-size: clamp(2.4rem, 7vw, 5rem);
}

.detail-placeholder {
    width: 72px;
    height: 5px;
    margin-top: 34px;
    border-radius: 999px;
    background: var(--accent);
}

/* Project detail pages */
.project-page {
    --project-accent: #16845b;
    --project-accent-dark: #0d6342;
    --project-tint: #edf8f3;
    --project-hero-start: #102b27;
    --project-hero-end: #173c34;
}

.project-page-training {
    --project-accent: #d55832;
    --project-accent-dark: #9f381c;
    --project-tint: #fff2ec;
    --project-hero-start: #2e1b22;
    --project-hero-end: #4a2523;
}

.experience-page-contest {
    --project-accent: #c78922;
    --project-accent-dark: #80520a;
    --project-tint: #fff7e8;
    --project-hero-start: #17130d;
    --project-hero-end: #3b2a16;
}

.experience-page-business {
    --project-accent: #087a55;
    --project-accent-dark: #075b41;
    --project-tint: #ecf8f3;
    --project-hero-start: #08251b;
    --project-hero-end: #0d5b43;
}

.project-page .label {
    color: var(--project-accent);
}

.project-header {
    position: relative;
    z-index: 10;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.94);
}

.project-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(1240px, calc(100% - 12vw));
    min-height: 74px;
    margin: 0 auto;
}

.project-page .back-link {
    color: var(--project-accent-dark);
}

.project-brand {
    color: var(--text);
    font-size: 0.86rem;
    font-weight: 800;
    letter-spacing: 0.03em;
}

.project-main {
    width: min(1240px, calc(100% - 12vw));
    max-width: none;
    margin: 0 auto;
    padding: 56px 0 80px;
}

.project-hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
    gap: clamp(36px, 7vw, 90px);
    align-items: end;
    min-height: 560px;
    overflow: hidden;
    padding: clamp(38px, 7vw, 88px);
    border-radius: 22px;
    background: linear-gradient(135deg, var(--project-hero-start), var(--project-hero-end));
    color: var(--white);
    box-shadow: 0 26px 70px rgba(15, 23, 42, 0.16);
}

.project-hero::before {
    content: "";
    position: absolute;
    top: -18%;
    right: -8%;
    width: min(48vw, 580px);
    aspect-ratio: 1;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 50%;
    box-shadow:
        0 0 0 50px rgba(255, 255, 255, 0.035),
        0 0 0 105px rgba(255, 255, 255, 0.025);
}

.project-hero::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: clamp(38px, 7vw, 88px);
    width: 90px;
    height: 7px;
    background: var(--project-accent);
}

.project-hero-copy,
.project-impact {
    position: relative;
    z-index: 1;
    min-width: 0;
}

.project-hero .label {
    color: #a7f3d0;
}

.project-page-training .project-hero .label {
    color: #fdba9f;
}

.experience-page-contest .project-hero .label {
    color: #f9d98e;
}

.experience-page-business .project-hero .label {
    color: #9bf3cc;
}

.experience-page-business .project-hero h1 {
    font-size: clamp(3.2rem, 7vw, 6.4rem);
}

.experience-page-business .project-impact dd {
    font-size: clamp(1.35rem, 2.25vw, 2.05rem);
}

.experience-page-business .project-impact dd small {
    display: block;
    margin: 7px 0 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.72rem;
    font-weight: 700;
}

.experience-page-contest .contest-impact-text,
.experience-page-contest .contest-impact-result {
    font-size: clamp(1.35rem, 2.2vw, 2rem);
    line-height: 1.25;
}

.experience-page-contest .project-impact dd small {
    display: block;
    margin: 7px 0 0;
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.78rem;
    font-weight: 700;
}

.experience-page-contest .contest-impact-result {
    color: #f9d98e;
}

.project-hero h1 {
    max-width: 800px;
    margin-bottom: 24px;
    font-size: clamp(3.4rem, 8vw, 7.4rem);
    line-height: 0.94;
    letter-spacing: -0.045em;
    overflow-wrap: anywhere;
}

.project-subtitle {
    margin: -10px 0 22px;
    color: rgba(255, 255, 255, 0.72);
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 700;
}

.project-lead {
    max-width: 670px;
    color: rgba(255, 255, 255, 0.82);
    font-size: clamp(1rem, 1.6vw, 1.16rem);
    overflow-wrap: anywhere;
}

.project-impact {
    display: grid;
    align-self: stretch;
    margin: 0;
    border: 1px solid rgba(255, 255, 255, 0.17);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.07);
    backdrop-filter: blur(8px);
}

.project-impact div {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 120px;
    padding: 24px;
}

.project-impact div + div {
    border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.project-impact dt {
    color: rgba(255, 255, 255, 0.62);
    font-size: 0.78rem;
    font-weight: 700;
}

.project-impact dd {
    margin-top: 3px;
    color: var(--white);
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    font-weight: 800;
    line-height: 1.15;
    overflow-wrap: anywhere;
}

.project-impact small {
    margin-left: 2px;
    font-size: 0.76rem;
}

.project-layout {
    display: grid;
    grid-template-columns: minmax(210px, 0.32fr) minmax(0, 1fr);
    gap: clamp(48px, 8vw, 108px);
    align-items: start;
    margin-top: 92px;
}

.project-toc {
    position: sticky;
    top: 28px;
}

.project-toc-title {
    margin-bottom: 15px;
    color: var(--project-accent);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.project-toc ol {
    list-style: none;
}

.project-toc li + li {
    border-top: 1px solid var(--line);
}

.project-toc a {
    display: grid;
    grid-template-columns: 28px 1fr;
    gap: 8px;
    align-items: baseline;
    padding: 12px 0;
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 700;
    line-height: 1.5;
}

.project-toc a:hover {
    color: var(--project-accent-dark);
}

.project-toc a span {
    color: var(--project-accent);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
}

.project-content {
    min-width: 0;
}

.project-section {
    scroll-margin-top: 28px;
    padding-bottom: 96px;
}

.project-section + .project-section {
    padding-top: 92px;
    border-top: 1px solid var(--line);
}

.project-section-number {
    margin-bottom: 10px;
    color: var(--project-accent);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.14em;
}

.project-section h2 {
    margin-bottom: 30px;
    color: var(--text);
    font-size: clamp(2rem, 4vw, 3.2rem);
    letter-spacing: -0.025em;
}

.project-section > p:not(.project-section-number) {
    max-width: 760px;
    color: var(--muted);
    font-size: 1.02rem;
}

.project-section > p + p {
    margin-top: 18px;
}

.project-note {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 24px;
    margin-top: 34px;
    padding: 24px 26px;
    border-left: 5px solid var(--project-accent);
    background: var(--project-tint);
}

.project-note-label {
    color: var(--project-accent-dark);
    font-size: 0.78rem;
    font-weight: 800;
}

.project-note p {
    color: var(--text);
    font-weight: 700;
}

.before-after {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 36px;
}

.before-after > div {
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--white);
}

.before-after > div:last-child {
    border-color: color-mix(in srgb, var(--project-accent) 38%, var(--line));
    background: var(--project-tint);
}

.before-after span,
.tech-item > span {
    color: var(--project-accent);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.before-after strong {
    display: block;
    margin: 13px 0 5px;
    font-size: 1rem;
}

.before-after p {
    color: var(--muted);
    font-size: 0.86rem;
}

.tech-stack-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.tech-item {
    min-height: 190px;
    padding: 25px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--white);
}

.tech-item h3 {
    margin: 20px 0 8px;
    font-size: 1.12rem;
}

.tech-item p {
    color: var(--muted);
    font-size: 0.87rem;
}

.reason-list {
    display: grid;
    gap: 0;
}

.reason-list > div {
    display: grid;
    grid-template-columns: minmax(180px, 0.65fr) minmax(0, 1.35fr);
    gap: 38px;
    padding: 27px 0;
    border-top: 1px solid var(--line);
}

.reason-list > div:last-child {
    border-bottom: 1px solid var(--line);
}

.reason-list h3 {
    font-size: 1rem;
    line-height: 1.6;
}

.reason-list p {
    color: var(--muted);
    font-size: 0.92rem;
}

.feature-list {
    display: grid;
    gap: 14px;
}

.feature-list article {
    display: grid;
    grid-template-columns: 54px 1fr;
    gap: 22px;
    padding: 26px;
    border-radius: 12px;
    background: var(--white);
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.055);
}

.feature-list article > span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--project-tint);
    color: var(--project-accent-dark);
    font-size: 0.74rem;
    font-weight: 800;
}

.feature-list h3 {
    margin-bottom: 7px;
    font-size: 1.05rem;
}

.feature-list p {
    color: var(--muted);
    font-size: 0.9rem;
}

.improvement-list {
    list-style: none;
    border-top: 1px solid var(--line);
}

.improvement-list li {
    display: grid;
    grid-template-columns: 42px 1fr;
    gap: 18px;
    align-items: start;
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
}

.improvement-list li > span {
    color: var(--project-accent);
    font-size: 0.74rem;
    font-weight: 800;
}

.improvement-list p {
    color: var(--text);
    font-size: 0.94rem;
}

.gakuchika-pending {
    max-width: 760px;
    padding: 28px;
    border: 1px dashed color-mix(in srgb, var(--project-accent) 45%, var(--line));
    border-radius: 12px;
    background: var(--project-tint);
}

.gakuchika-pending span {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--project-accent-dark);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.1em;
}

.gakuchika-pending p {
    color: var(--muted);
    font-size: 0.94rem;
}

.contest-result-card {
    position: relative;
    overflow: hidden;
    padding: clamp(30px, 6vw, 58px);
    border-radius: 16px;
    background: linear-gradient(135deg, #17130d, #3b2a16);
    color: var(--white);
    box-shadow: 0 18px 48px rgba(23, 19, 13, 0.16);
}

.contest-result-card::after {
    content: "01";
    position: absolute;
    top: -24px;
    right: 18px;
    color: rgba(255, 255, 255, 0.055);
    font-size: clamp(8rem, 22vw, 15rem);
    font-weight: 800;
    line-height: 1;
}

.contest-result-label,
.contest-result-card > strong,
.contest-result-card dl {
    position: relative;
    z-index: 1;
}

.contest-result-label {
    margin-bottom: 12px;
    color: #f9d98e;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.contest-result-card > strong {
    display: block;
    font-size: clamp(2.4rem, 7vw, 5.4rem);
    line-height: 1.05;
    letter-spacing: -0.035em;
}

.contest-result-card dl {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 42px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.contest-result-card dt {
    color: rgba(255, 255, 255, 0.58);
    font-size: 0.72rem;
    font-weight: 700;
}

.contest-result-card dd {
    margin-top: 5px;
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1.6;
}

.business-hypothesis {
    margin-top: 18px;
}

.business-flow {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: 36px;
    list-style: none;
}

.business-flow li {
    position: relative;
    min-height: 210px;
    padding: 25px;
    border-top: 4px solid var(--project-accent);
    border-radius: 12px;
    background: var(--white);
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.055);
}

.business-flow li:not(:last-child)::after {
    content: "→";
    position: absolute;
    top: 50%;
    right: -18px;
    z-index: 2;
    color: var(--project-accent);
    font-size: 1.25rem;
    font-weight: 800;
    transform: translateY(-50%);
}

.business-flow li > span,
.business-value-grid article > span,
.business-acquisition-grid article > span,
.business-pricing-grid article > span {
    color: var(--project-accent);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.business-flow strong {
    display: block;
    margin: 18px 0 9px;
    font-size: 1rem;
    line-height: 1.55;
}

.business-flow p {
    color: var(--muted);
    font-size: 0.86rem;
}

.business-value-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.business-value-grid article {
    padding: clamp(26px, 5vw, 42px);
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--white);
}

.business-value-grid article:last-child {
    border-color: color-mix(in srgb, var(--project-accent) 40%, var(--line));
    background: var(--project-tint);
}

.business-value-grid h3 {
    margin: 16px 0 20px;
    font-size: clamp(1.15rem, 2vw, 1.45rem);
}

.business-value-grid ul {
    display: grid;
    gap: 11px;
    padding-left: 1.1em;
    color: var(--muted);
    font-size: 0.9rem;
}

.business-roadmap {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.business-roadmap article {
    display: flex;
    min-height: 360px;
    padding: 27px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--white);
    flex-direction: column;
}

.business-roadmap article:nth-child(2) {
    border-color: color-mix(in srgb, var(--project-accent) 45%, var(--line));
}

.business-phase-number {
    display: grid;
    width: 48px;
    height: 48px;
    place-items: center;
    border-radius: 50%;
    background: var(--project-accent-dark);
    color: var(--white);
    font-size: 1.35rem;
    font-weight: 800;
}

.business-phase-label {
    margin-top: 18px;
    color: var(--project-accent);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.business-roadmap h3 {
    margin: 10px 0 14px;
    font-size: 1.06rem;
}

.business-roadmap article > p:not(.business-phase-label) {
    color: var(--muted);
    font-size: 0.88rem;
}

.business-roadmap article > strong {
    margin-top: auto;
    padding-top: 22px;
    color: var(--project-accent-dark);
    font-size: 0.92rem;
}

.business-roadmap article > small {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.72rem;
}

.business-subheading {
    margin: 54px 0 24px;
    color: var(--text);
    font-size: clamp(1.25rem, 2.5vw, 1.7rem);
}

.business-acquisition-grid,
.business-pricing-grid {
    display: grid;
    gap: 14px;
}

.business-acquisition-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.business-acquisition-grid article,
.business-pricing-grid article {
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--white);
}

.business-acquisition-grid strong,
.business-pricing-grid strong {
    display: block;
    margin: 14px 0 8px;
    color: var(--text);
    font-size: clamp(1.75rem, 4vw, 2.6rem);
    line-height: 1.15;
}

.business-acquisition-grid strong small,
.business-pricing-grid strong small {
    margin-left: 3px;
    font-size: 0.76rem;
}

.business-acquisition-grid p,
.business-pricing-grid p {
    color: var(--muted);
    font-size: 0.84rem;
}

.business-followup-copy {
    max-width: 760px;
    margin-top: 28px;
    color: var(--muted);
    font-size: 0.94rem;
}

.business-competition-list .is-highlighted {
    padding-right: 22px;
    padding-left: 22px;
    border: 1px solid color-mix(in srgb, var(--project-accent) 42%, var(--line));
    background: var(--project-tint);
}

.business-competition-list .is-highlighted h3 {
    color: var(--project-accent-dark);
}

.business-difference p {
    font-size: 1.02rem;
}

.business-pricing-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 36px;
}

.business-data-growth {
    margin-top: 18px;
}

.business-finance-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 28px;
}

.business-finance-grid > div {
    min-height: 150px;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--white);
}

.business-finance-grid > div:nth-child(4),
.business-finance-grid > div:nth-child(5) {
    background: var(--project-tint);
}

.business-finance-grid dt {
    color: var(--project-accent-dark);
    font-size: 0.76rem;
    font-weight: 800;
}

.business-finance-grid dd {
    margin-top: 14px;
    color: var(--text);
    font-size: clamp(1.45rem, 3.4vw, 2.35rem);
    font-weight: 800;
    line-height: 1.15;
}

.business-finance-grid dd small {
    display: block;
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.72rem;
}

.business-plan-note {
    margin-top: 30px;
    padding: 22px 24px;
    border-left: 4px solid var(--project-accent);
    background: var(--project-tint);
}

.business-plan-note strong {
    color: var(--project-accent-dark);
    font-size: 0.82rem;
}

.business-plan-note p {
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.86rem;
}

.project-preview-section {
    padding-bottom: 0;
}

.project-preview-placeholder {
    margin-top: 34px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--white);
}

.preview-window {
    position: relative;
    min-height: 360px;
    padding: 17px;
    background:
        linear-gradient(var(--line), var(--line)) 0 48px / 100% 1px no-repeat,
        linear-gradient(135deg, var(--project-tint), var(--white));
}

.preview-window > span {
    display: inline-block;
    width: 9px;
    height: 9px;
    margin-right: 5px;
    border-radius: 50%;
    background: var(--line);
}

.preview-window-content {
    position: absolute;
    inset: 49px 0 0;
    display: grid;
    place-items: center;
    color: color-mix(in srgb, var(--project-accent) 55%, white);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 800;
    letter-spacing: -0.06em;
    opacity: 0.5;
}

.project-preview-placeholder figcaption {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 18px 22px;
    border-top: 1px solid var(--line);
}

.project-preview-placeholder figcaption span {
    color: var(--muted);
    font-size: 0.84rem;
}

.project-link-disabled {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    margin-top: 20px;
    padding: 0 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 800;
    cursor: not-allowed;
}

.project-next {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    margin-top: 100px;
    padding-top: 36px;
    border-top: 1px solid var(--line);
}

.project-next > span {
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.project-next a {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--project-accent-dark);
    font-size: clamp(1.25rem, 3vw, 2rem);
    font-weight: 800;
}

.project-next-back {
    align-items: flex-start;
}

.qualification-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    list-style: none;
}

.qualification-list li {
    background: var(--white);
    border-left: 4px solid var(--primary);
    border-radius: 8px;
    padding: 16px 18px;
    font-weight: 700;
}

.contact {
    text-align: center;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 54px 24px;
    box-shadow: var(--shadow);
}

.contact .label {
    margin-bottom: 6px;
}

.mail-link {
    display: inline-block;
    margin: 12px 0 8px;
    color: var(--primary-dark);
    font-size: 1.1rem;
    font-weight: 800;
}

.github-text {
    color: var(--muted);
}

footer {
    text-align: center;
    padding: 34px 20px;
    color: var(--muted);
    border-top: 1px solid var(--line);
}

@keyframes intro-label-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes intro-title-in {
    from {
        opacity: 0;
        transform: translateY(28px) scale(0.96);
        letter-spacing: 0.12em;
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
        letter-spacing: 0.02em;
    }
}

@keyframes intro-line-in {
    to {
        width: 76px;
    }
}

@keyframes intro-curtain {
    to {
        clip-path: inset(0 0 100% 0);
        visibility: hidden;
    }
}

@keyframes hero-image-in {
    from {
        transform: scale(1.08);
        filter: saturate(0.72) brightness(0.82);
    }
    to {
        transform: scale(1);
        filter: saturate(1) brightness(1);
    }
}

@keyframes hero-copy-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes typewriter-cursor {
    50% {
        opacity: 0;
    }
}

@media (max-width: 820px) {
    .hero {
        min-height: auto;
        padding-bottom: 72px;
    }

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

    .nav ul {
        justify-content: flex-start;
        gap: 12px 18px;
    }

    .hero-content {
        margin-top: 86px;
    }

    .two-column,
    .skill-grid,
    .work-grid,
    .qualification-list {
        grid-template-columns: 1fr;
    }

    .section {
        margin-bottom: 78px;
    }

    .experience-menu {
        grid-template-columns: 1fr;
    }

    .project-header-inner,
    .project-main {
        width: min(100% - 48px, 720px);
    }

    .project-main {
        padding-top: 32px;
    }

    .project-hero {
        grid-template-columns: 1fr;
        min-height: auto;
    }

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

    .project-impact div {
        min-height: 110px;
        padding: 18px;
    }

    .project-impact div + div {
        border-top: 0;
        border-left: 1px solid rgba(255, 255, 255, 0.14);
    }

    .project-layout {
        grid-template-columns: 1fr;
        gap: 64px;
        margin-top: 70px;
    }

    .project-toc {
        position: static;
    }

    .project-toc ol {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0 24px;
        border-bottom: 1px solid var(--line);
    }

    .project-toc li {
        border-top: 1px solid var(--line);
    }

    .project-section {
        scroll-margin-top: 16px;
    }

    .business-flow {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .business-flow li:not(:last-child)::after {
        content: none;
    }

    .business-roadmap,
    .business-acquisition-grid {
        grid-template-columns: 1fr;
    }

    .business-roadmap article {
        min-height: auto;
    }

    .business-finance-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 520px) {
    .hero {
        padding: 22px 20px 64px;
    }

    .typewriter {
        min-height: 9em;
    }

    main {
        padding: 64px 20px 36px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .button {
        width: 100%;
    }

    .skill-card {
        flex-direction: column;
        gap: 4px;
    }

    .experience-option {
        min-height: 180px;
    }

    .project-header-inner,
    .project-main {
        width: calc(100% - 40px);
    }

    .project-header-inner {
        min-height: 66px;
    }

    .project-brand {
        display: none;
    }

    .project-main {
        padding: 22px 0 56px;
    }

    .project-hero {
        gap: 34px;
        padding: 30px 24px 36px;
        border-radius: 15px;
    }

    .project-hero::after {
        left: 24px;
    }

    .project-hero h1 {
        font-size: clamp(2.8rem, 15vw, 4.4rem);
    }

    .experience-page-business .project-hero h1 {
        font-size: clamp(2.6rem, 12vw, 3.4rem);
    }

    .project-impact {
        grid-template-columns: 1fr;
    }

    .project-impact div {
        min-height: 88px;
    }

    .project-impact div + div {
        border-top: 1px solid rgba(255, 255, 255, 0.14);
        border-left: 0;
    }

    .project-impact dd {
        font-size: 1.8rem;
    }

    .project-layout {
        margin-top: 56px;
    }

    .project-toc ol {
        grid-template-columns: 1fr;
    }

    .project-section {
        padding-bottom: 72px;
    }

    .project-section + .project-section {
        padding-top: 68px;
    }

    .project-section h2 {
        margin-bottom: 24px;
    }

    .project-note,
    .reason-list > div {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .before-after,
    .tech-stack-grid {
        grid-template-columns: 1fr;
    }

    .business-flow,
    .business-value-grid,
    .business-pricing-grid,
    .business-finance-grid {
        grid-template-columns: 1fr;
    }

    .business-flow li {
        min-height: auto;
    }

    .contest-result-card dl {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .tech-item {
        min-height: auto;
    }

    .feature-list article {
        grid-template-columns: 1fr;
        gap: 14px;
        padding: 22px;
    }

    .preview-window {
        min-height: 240px;
    }

    .project-preview-placeholder figcaption {
        align-items: flex-start;
        flex-direction: column;
        gap: 4px;
    }

    .project-next {
        margin-top: 72px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .page-intro {
        display: none;
    }

    *,
    *::before,
    *::after {
        animation: none !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }

    .motion-ready .hero .nav,
    .motion-ready .hero-content > .label,
    .motion-ready .hero-content > h1,
    .motion-ready .hero-content > .lead,
    .motion-ready .hero-content > .hero-actions,
    .motion-ready .reveal-target {
        opacity: 1;
        transform: none;
    }

    .typewriter-visual::after {
        display: none;
    }
}