/* =========================================================
   NODE ARCHITECTS — style.css
   Architecture Design Studio
   ========================================================= */

/* ---------------------------------------------------------
   Custom Properties
   --------------------------------------------------------- */
:root {
    --na-black:     #0d0d0d;
    --na-dark:      #1a1a1a;
    --na-mid:       #666666;
    --na-light:     #b0b0b0;
    --na-border:    #e0e0e0;
    --na-bg:        #ffffff;
    --na-bg-warm:   #f8f7f5;
    --na-accent:    #0d0d0d;

    --na-font-en:   'Montserrat', sans-serif;
    --na-font-ja:   'Noto Sans JP', sans-serif;

    --na-ease:      cubic-bezier(0.16, 1, 0.3, 1);
    --na-dur:       0.8s;

    --na-max-w:     1400px;
    --na-gap:       clamp(40px, 6vw, 100px);
}

/* ---------------------------------------------------------
   Reset / Base (scoped to work-2)
   --------------------------------------------------------- */
.work-2-body {
    font-family: var(--na-font-ja);
    font-weight: 300;
    color: var(--na-dark);
    background-color: var(--na-bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.work-2-body * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.work-2-body img {
    display: block;
    max-width: 100%;
    height: auto;
}

.work-2-body a {
    color: inherit;
    text-decoration: none;
}

.na-main {
    overflow: hidden;
}

/* ---------------------------------------------------------
   Section Label
   --------------------------------------------------------- */
.na-section-label {
    display: inline-block;
    font-family: var(--na-font-en);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: var(--na-mid);
    padding-bottom: 12px;
    position: relative;
}

.na-section-label::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 1px;
    background: var(--na-dark);
}

/* ---------------------------------------------------------
   HEADER
   --------------------------------------------------------- */
.na-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 0 clamp(20px, 4vw, 60px);
    transition: background var(--na-dur) var(--na-ease),
                padding 0.4s ease;
}

.na-header.is-scrolled {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--na-border);
    padding-top: 0;
    padding-bottom: 0;
}

.na-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    max-width: var(--na-max-w);
    margin: 0 auto;
}

/* Logo */
.na-header__logo {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--na-bg);
    transition: color 0.4s ease;
}

.na-header.is-scrolled .na-header__logo {
    color: var(--na-dark);
}

.na-header__logo-mark {
    color: currentColor;
    flex-shrink: 0;
}

.na-header__logo-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.na-header__logo-name {
    font-family: var(--na-font-en);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.25em;
    line-height: 1;
}

.na-header__logo-sub {
    font-family: var(--na-font-en);
    font-size: 9px;
    font-weight: 300;
    letter-spacing: 0.2em;
    color: var(--na-light);
    line-height: 1;
}

.na-header.is-scrolled .na-header__logo-sub {
    color: var(--na-mid);
}

/* Navigation */
.na-nav__list {
    display: flex;
    align-items: center;
    gap: clamp(28px, 3vw, 50px);
    list-style: none;
}

.na-nav__item a {
    font-family: var(--na-font-en);
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.85);
    transition: color 0.3s ease;
    position: relative;
}

.na-header.is-scrolled .na-nav__item a {
    color: var(--na-mid);
}

.na-nav__item a::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width 0.4s var(--na-ease);
}

.na-nav__item a:hover::after,
.na-nav__item a:focus::after {
    width: 100%;
}

.na-nav__item a:hover {
    color: #fff;
}

.na-header.is-scrolled .na-nav__item a:hover {
    color: var(--na-dark);
}

/* CTA nav item */
.na-nav__item--cta a {
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 8px 20px;
    border-radius: 0;
    transition: background 0.35s ease, color 0.35s ease, border-color 0.35s ease;
}

.na-nav__item--cta a::after {
    display: none;
}

.na-nav__item--cta a:hover {
    background: #fff;
    color: var(--na-dark) !important;
    border-color: #fff;
}

.na-header.is-scrolled .na-nav__item--cta a {
    border-color: var(--na-dark);
    color: var(--na-dark);
}

.na-header.is-scrolled .na-nav__item--cta a:hover {
    background: var(--na-dark);
    color: #fff !important;
}

/* Hamburger */
.na-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 7px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    width: 40px;
    height: 40px;
}

.na-hamburger__line {
    display: block;
    width: 24px;
    height: 1px;
    background: #fff;
    transition: transform 0.4s var(--na-ease), opacity 0.3s ease, background 0.3s ease;
}

.na-header.is-scrolled .na-hamburger__line {
    background: var(--na-dark);
}

.na-hamburger.is-active .na-hamburger__line:first-child {
    transform: translateY(4px) rotate(45deg);
}

.na-hamburger.is-active .na-hamburger__line:last-child {
    transform: translateY(-4px) rotate(-45deg);
}

/* ---------------------------------------------------------
   SCROLL ANIMATION
   --------------------------------------------------------- */
.slide-from-left,
.slide-from-right {
    opacity: 0;
    transition: opacity var(--na-dur) var(--na-ease),
                transform var(--na-dur) var(--na-ease);
    will-change: transform, opacity;
}

.slide-from-left  { transform: translateX(-60px); }
.slide-from-right { transform: translateX(60px); }

.slide-from-left.is-visible,
.slide-from-right.is-visible {
    opacity: 1;
    transform: translateX(0);
}

/* ---------------------------------------------------------
   01. HERO
   --------------------------------------------------------- */
.na-hero {
    position: relative;
    width: 100%;
    height: 100svh;
    min-height: 600px;
    overflow: hidden;
    background: var(--na-black);
}

.na-hero__bg {
    position: absolute;
    inset: 0;
}

.na-hero__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transform: scale(1.08);
    transition: transform 6s ease-out;
}

.na-hero.is-loaded .na-hero__img {
    transform: scale(1);
}

.na-hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        160deg,
        rgba(0, 0, 0, 0.35) 0%,
        rgba(0, 0, 0, 0.65) 100%
    );
}

/* Hero Content */
.na-hero__content {
    position: absolute;
    bottom: clamp(60px, 10vw, 120px);
    left: clamp(20px, 6vw, 80px);
}

.na-hero__label {
    font-family: var(--na-font-en);
    font-size: 10px;
    font-weight: 400;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 20px;
}

.na-hero__title {
    font-family: var(--na-font-en);
    font-weight: 200;
    font-size: clamp(44px, 7vw, 100px);
    letter-spacing: 0.12em;
    line-height: 1;
    color: #fff;
    display: flex;
    flex-direction: column;
    gap: 0.05em;
    overflow: hidden;
}

.na-hero__title span {
    display: block;
    transform: translateY(100%);
    transition: transform 1.2s var(--na-ease);
}

.na-hero.is-loaded .na-hero__title span:first-child  { transform: translateY(0); }
.na-hero.is-loaded .na-hero__title span:last-child   { transform: translateY(0); transition-delay: 0.15s; }

.na-hero__tagline {
    font-family: var(--na-font-ja);
    font-size: clamp(12px, 1.5vw, 16px);
    font-weight: 300;
    letter-spacing: 0.3em;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 20px;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 1s ease 0.8s, transform 1s ease 0.8s;
}

.na-hero.is-loaded .na-hero__tagline {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll indicator */
.na-hero__scroll {
    position: absolute;
    bottom: clamp(40px, 6vw, 60px);
    right: clamp(20px, 4vw, 60px);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.na-hero__scroll-line {
    display: block;
    width: 1px;
    height: 60px;
    background: rgba(255, 255, 255, 0.4);
    position: relative;
    overflow: hidden;
}

.na-hero__scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: #fff;
    animation: scrollLine 2.4s ease-in-out infinite;
}

@keyframes scrollLine {
    0%   { top: -100%; }
    50%  { top: 0%; }
    100% { top: 100%; }
}

.na-hero__scroll-text {
    font-family: var(--na-font-en);
    font-size: 9px;
    letter-spacing: 0.3em;
    color: rgba(255, 255, 255, 0.5);
    writing-mode: vertical-lr;
}

/* Counter */
.na-hero__counter {
    position: absolute;
    top: 50%;
    right: clamp(20px, 4vw, 60px);
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-family: var(--na-font-en);
    font-size: 11px;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 0.1em;
}

.na-hero__counter-sep {
    display: block;
    width: 1px;
    height: 24px;
    background: rgba(255, 255, 255, 0.3);
}

/* ---------------------------------------------------------
   02. CONCEPT
   --------------------------------------------------------- */
.na-concept {
    background: var(--na-bg);
    padding: var(--na-gap) 0;
}

.na-concept__grid {
    max-width: var(--na-max-w);
    margin: 0 auto;
    padding: 0 clamp(20px, 6vw, 80px);
    display: grid;
    grid-template-columns: 80px 1fr 1fr;
    grid-template-rows: auto auto;
    column-gap: clamp(30px, 5vw, 80px);
    row-gap: clamp(40px, 6vw, 80px);
    align-items: start;
}

.na-concept__number {
    grid-column: 1;
    grid-row: 1;
    font-family: var(--na-font-en);
    font-weight: 200;
    font-size: clamp(64px, 8vw, 120px);
    letter-spacing: -0.02em;
    color: var(--na-border);
    line-height: 1;
    padding-top: 10px;
}

.na-concept__body {
    grid-column: 2;
    grid-row: 1;
}

.na-concept__heading {
    font-family: var(--na-font-ja);
    font-weight: 300;
    font-size: clamp(26px, 3.5vw, 48px);
    letter-spacing: 0.08em;
    line-height: 1.6;
    color: var(--na-dark);
    margin: 20px 0 30px;
}

.na-concept__text p {
    font-size: clamp(13px, 1.2vw, 15px);
    line-height: 2;
    color: var(--na-mid);
    letter-spacing: 0.05em;
    margin-bottom: 1.5em;
}

.na-concept__stat-row {
    display: flex;
    gap: clamp(24px, 4vw, 50px);
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--na-border);
}

.na-concept__stat {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.na-concept__stat-num {
    font-family: var(--na-font-en);
    font-weight: 300;
    font-size: clamp(24px, 3vw, 38px);
    letter-spacing: -0.02em;
    color: var(--na-dark);
}

.na-concept__stat-label {
    font-family: var(--na-font-en);
    font-size: 10px;
    letter-spacing: 0.2em;
    color: var(--na-light);
    text-transform: uppercase;
}

.na-concept__image {
    grid-column: 3;
    grid-row: 1 / 3;
}

.na-concept__image img {
    width: 100%;
    height: clamp(400px, 55vw, 700px);
    object-fit: cover;
    filter: grayscale(15%);
}

/* ---------------------------------------------------------
   03. GALLERY
   --------------------------------------------------------- */
.na-gallery {
    background: var(--na-bg-warm);
    padding: var(--na-gap) 0;
}

.na-gallery__header {
    max-width: var(--na-max-w);
    margin: 0 auto;
    padding: 0 clamp(20px, 6vw, 80px) clamp(40px, 5vw, 60px);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.na-gallery__heading {
    font-family: var(--na-font-en);
    font-weight: 200;
    font-size: clamp(32px, 4.5vw, 64px);
    letter-spacing: 0.12em;
    color: var(--na-dark);
}

.na-gallery__grid {
    max-width: var(--na-max-w);
    margin: 0 auto;
    padding: 0 clamp(20px, 6vw, 80px);
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: clamp(12px, 1.5vw, 20px);
}

.na-gallery__item {
    overflow: hidden;
    position: relative;
}

.na-gallery__item--large {
    grid-column: 1;
    grid-row: 1 / 3;
}

.na-gallery__thumb {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 100%;
}

.na-gallery__item--large .na-gallery__thumb {
    height: clamp(350px, 50vw, 700px);
}

.na-gallery__item:not(.na-gallery__item--large) .na-gallery__thumb {
    height: clamp(200px, 22vw, 340px);
}

.na-gallery__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter 0.6s ease, transform 0.8s var(--na-ease);
}

.na-gallery__thumb:hover img {
    filter: grayscale(0%);
    transform: scale(1.04);
}

.na-gallery__caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px 20px 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 100%);
    display: flex;
    align-items: baseline;
    gap: 14px;
    transform: translateY(8px);
    opacity: 0;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.na-gallery__thumb:hover .na-gallery__caption {
    opacity: 1;
    transform: translateY(0);
}

.na-gallery__caption-num {
    font-family: var(--na-font-en);
    font-size: 11px;
    font-weight: 300;
    letter-spacing: 0.2em;
    color: rgba(255,255,255,0.6);
}

.na-gallery__caption-title {
    font-family: var(--na-font-en);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0.1em;
    color: #fff;
    flex: 1;
}

.na-gallery__caption-year {
    font-family: var(--na-font-en);
    font-size: 11px;
    font-weight: 300;
    color: rgba(255,255,255,0.6);
    letter-spacing: 0.05em;
}

/* ---------------------------------------------------------
   04. PROJECT INFO
   --------------------------------------------------------- */
.na-info {
    background: var(--na-bg);
    padding: var(--na-gap) 0;
}

.na-info__inner {
    max-width: var(--na-max-w);
    margin: 0 auto;
    padding: 0 clamp(20px, 6vw, 80px);
}

.na-info__heading-wrap {
    margin-bottom: clamp(40px, 5vw, 70px);
}

.na-info__heading {
    font-family: var(--na-font-en);
    font-weight: 200;
    font-size: clamp(28px, 4vw, 56px);
    letter-spacing: 0.1em;
    line-height: 1.2;
    color: var(--na-dark);
    margin-top: 20px;
}

.na-info__heading span {
    display: block;
    font-family: var(--na-font-en);
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0.3em;
    color: var(--na-mid);
    margin-top: 10px;
    text-transform: uppercase;
}

.na-info__body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(30px, 6vw, 100px);
    align-items: start;
}

.na-info__image img {
    width: 100%;
    height: clamp(320px, 40vw, 560px);
    object-fit: cover;
}

/* Table */
.na-info__table-wrap {
    padding-top: 10px;
}

.na-info__table {
    width: 100%;
    border-collapse: collapse;
}

.na-info__table tr {
    border-bottom: 1px solid var(--na-border);
}

.na-info__table tr:first-child {
    border-top: 1px solid var(--na-border);
}

.na-info__table th {
    font-family: var(--na-font-en);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--na-mid);
    text-align: left;
    padding: 20px 0;
    width: 120px;
    vertical-align: top;
}

.na-info__table td {
    font-family: var(--na-font-ja);
    font-size: 14px;
    font-weight: 300;
    color: var(--na-dark);
    padding: 20px 0;
    line-height: 1.7;
    letter-spacing: 0.05em;
}

/* ---------------------------------------------------------
   05. CONTACT CTA
   --------------------------------------------------------- */
.na-contact {
    background: var(--na-black);
    padding: clamp(80px, 12vw, 160px) 0;
}

.na-contact__inner {
    max-width: var(--na-max-w);
    margin: 0 auto;
    padding: 0 clamp(20px, 6vw, 80px);
    max-width: 700px;
}

.na-contact .na-section-label {
    color: rgba(255,255,255,0.4);
}

.na-contact .na-section-label::after {
    background: rgba(255,255,255,0.4);
}

.na-contact__heading {
    font-family: var(--na-font-ja);
    font-weight: 200;
    font-size: clamp(24px, 3.5vw, 44px);
    letter-spacing: 0.1em;
    line-height: 1.7;
    color: #fff;
    margin: 24px 0 28px;
}

.na-contact__body {
    font-size: clamp(13px, 1.2vw, 15px);
    line-height: 2;
    color: rgba(255,255,255,0.5);
    letter-spacing: 0.05em;
    margin-bottom: 48px;
}

.na-contact__btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-family: var(--na-font-en);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: #fff;
    border: 1px solid rgba(255,255,255,0.75);
    padding: 18px 36px;
    transition: background 0.35s ease, border-color 0.35s ease, color 0.35s ease;
}

.na-contact__btn:hover {
    background: rgba(255,255,255,0.12);
    border-color: #fff;
    color: #fff;
}

/* ---------------------------------------------------------
   FOOTER
   --------------------------------------------------------- */
.na-footer {
    background: #0a0a0a;
    padding-top: clamp(60px, 8vw, 100px);
}

.na-footer__grid {
    max-width: var(--na-max-w);
    margin: 0 auto;
    padding: 0 clamp(20px, 6vw, 80px) clamp(60px, 6vw, 80px);
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: clamp(40px, 6vw, 80px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.na-footer__brand-name {
    font-family: var(--na-font-en);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.25em;
    color: #fff;
    margin-bottom: 16px;
}

.na-footer__brand-copy {
    font-family: var(--na-font-ja);
    font-size: 13px;
    font-weight: 300;
    letter-spacing: 0.1em;
    line-height: 1.8;
    color: rgba(255,255,255,0.4);
    margin-bottom: 28px;
}

.na-footer__social {
    display: flex;
    gap: 16px;
}

.na-footer__social a {
    color: rgba(255,255,255,0.4);
    transition: color 0.3s ease;
}

.na-footer__social a:hover {
    color: #fff;
}

.na-footer__dl dt {
    font-family: var(--na-font-en);
    font-size: 10px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.3);
    margin-top: 20px;
    margin-bottom: 6px;
}

.na-footer__dl dt:first-child {
    margin-top: 0;
}

.na-footer__dl dd {
    font-family: var(--na-font-ja);
    font-size: 13px;
    font-weight: 300;
    line-height: 1.8;
    color: rgba(255,255,255,0.6);
    letter-spacing: 0.04em;
}

.na-footer__nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.na-footer__nav-list a {
    font-family: var(--na-font-en);
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.5);
    transition: color 0.3s ease;
}

.na-footer__nav-list a:hover {
    color: #fff;
}

.na-footer__back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--na-font-en);
    font-size: 10px;
    letter-spacing: 0.2em;
    color: rgba(255,255,255,0.3);
    margin-top: 36px;
    text-transform: uppercase;
    transition: color 0.3s ease;
}

.na-footer__back:hover {
    color: rgba(255,255,255,0.7);
}

.na-footer__bottom {
    max-width: var(--na-max-w);
    margin: 0 auto;
    padding: 24px clamp(20px, 6vw, 80px);
}

.na-footer__bottom p {
    font-family: var(--na-font-en);
    font-size: 10px;
    letter-spacing: 0.15em;
    color: rgba(255,255,255,0.2);
}

/* ---------------------------------------------------------
   RESPONSIVE — Tablet
   --------------------------------------------------------- */
@media (max-width: 1024px) {
    .na-concept__grid {
        grid-template-columns: 60px 1fr;
        grid-template-rows: auto auto;
    }
    .na-concept__image {
        grid-column: 1 / 3;
        grid-row: 2;
    }
    .na-concept__image img {
        height: clamp(280px, 45vw, 450px);
    }
    .na-info__body {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .na-hamburger { display: flex; }
    .na-nav {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        padding: 30px clamp(20px, 6vw, 40px) 40px;
        border-top: 1px solid var(--na-border);
    }
    .na-nav.is-open {
        display: block;
    }
    .na-nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
    }
    .na-nav__item {
        width: 100%;
        border-bottom: 1px solid var(--na-border);
    }
    .na-nav__item a {
        display: block;
        padding: 18px 0;
        color: var(--na-dark);
        font-size: 13px;
    }
    .na-nav__item--cta a {
        border: none;
        padding: 18px 0;
    }

    .na-gallery__grid {
        grid-template-columns: 1fr;
    }
    .na-gallery__item--large {
        grid-column: 1;
        grid-row: auto;
    }
    .na-gallery__item--large .na-gallery__thumb {
        height: clamp(250px, 60vw, 400px);
    }
    .na-gallery__item:not(.na-gallery__item--large) .na-gallery__thumb {
        height: clamp(180px, 50vw, 280px);
    }

    .na-concept__grid {
        grid-template-columns: 1fr;
    }
    .na-concept__number {
        display: none;
    }
    .na-concept__body { grid-column: 1; }
    .na-concept__image { grid-column: 1; }

    .na-footer__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .na-hero__title {
        font-size: clamp(36px, 10vw, 56px);
    }
    .na-concept__stat-row {
        gap: 24px;
    }
}