@charset "UTF-8";

/* ==========================================================
   GREYFALL · SITE SHELL
   ----------------------------------------------------------
   기능 계약 (변경 금지):
     .gf-header / .gf-header-inner / .gf-nav
     .gf-nav-toggle          → site-shell.js가 생성
     .gf-header.is-nav-open  → site-shell.js가 제어
     .gf-footer / .gf-footer-inner → site-shell.js가 생성
     .gf-push-panel          → push-ui.js가 생성
   ========================================================== */


/* ----------------------------------------------------------
   01 · HEADER
   ---------------------------------------------------------- */

.gf-header {
    position: relative;
    z-index: 1000;

    background-color: var(--gf-shell);

    background-image:
        linear-gradient(
            180deg,
            rgba(255, 255, 255, 0.03),
            transparent 70%
        );

    border-bottom: 1px solid var(--gf-line);
    box-shadow: var(--gf-inset-soft);
}

/* 좌측 red hairline — 사이트 전역 디자인 언어 */
.gf-header::after {
    content: "";

    position: absolute;
    left: 0;
    bottom: -1px;

    width: clamp(56px, 11vw, 152px);
    height: 1px;

    background:
        linear-gradient(
            90deg,
            var(--gf-red-bright),
            var(--gf-red-soft)
        );
}

.gf-header-inner {
    position: relative;

    width: min(
        calc(100% - (var(--gf-gutter) * 2)),
        var(--gf-max-width)
    );

    margin: 0 auto;
    min-height: var(--gf-header-h);

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}


/* ----------------------------------------------------------
   02 · LOGO
   ---------------------------------------------------------- */

.gf-logo {
    flex: 0 0 auto;

    display: inline-flex;
    align-items: center;
    gap: 10px;

    font-family: var(--gf-font-display);
    font-size: 1.02rem;
    font-weight: var(--gf-w-display);
    letter-spacing: 0.11em;

    color: var(--gf-text-strong);

    white-space: nowrap;
}

.gf-logo::before {
    content: "";

    width: 6px;
    height: 6px;

    background: var(--gf-red-bright);
    box-shadow: 0 0 0 3px rgba(158, 51, 44, 0.16);
}


/* ----------------------------------------------------------
   03 · NAVIGATION (DESKTOP)
   ---------------------------------------------------------- */

.gf-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;

    gap: 4px 24px;

    font-family: var(--gf-mono);
    font-size: 0.7rem;
    font-weight: 400;
    letter-spacing: 0.055em;
}

.gf-nav a {
    position: relative;

    padding: 7px 0;

    color: var(--gf-text-dim);

    transition: color 200ms ease;
}

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

    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;

    height: 1px;

    background: var(--gf-red-bright);

    transform: scaleX(0);
    transform-origin: left;
    transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1);
}

.gf-nav a:hover {
    color: var(--gf-text-strong);
}

.gf-nav a:hover::after {
    transform: scaleX(1);
}

.gf-nav a[aria-current="page"] {
    color: var(--gf-text-strong);
}

.gf-nav a[aria-current="page"]::after {
    transform: scaleX(1);
}

/* APPLICATION — 유일한 강조 링크 */
.gf-application-link {
    padding: 10px 16px !important;

    border: 1px solid var(--gf-line-strong);

    background-image:
        linear-gradient(
            180deg,
            rgba(255, 255, 255, 0.035),
            transparent 66%
        );

    box-shadow: var(--gf-inset-soft);

    color: var(--gf-text) !important;

    transition:
        color 200ms ease,
        border-color 200ms ease,
        background-color 200ms ease;
}

.gf-application-link::after {
    display: none;
}

.gf-application-link:hover {
    color: var(--gf-text-strong) !important;

    border-color: rgba(158, 51, 44, 0.66);
    background-color: var(--gf-red-wash);
}

.gf-nav a.gf-application-link[aria-current="page"] {
    border-color: rgba(158, 51, 44, 0.66);
    background-color: var(--gf-red-wash);
}


/* ----------------------------------------------------------
   04 · NAV TOGGLE
   ---------------------------------------------------------- */

.gf-nav-toggle {
    display: none;

    flex: 0 0 auto;

    width: 46px;
    height: 46px;
    padding: 13px;

    margin-left: auto;

    border: 1px solid var(--gf-line-strong);
    border-radius: 0;

    background-color: transparent;
    background-image:
        linear-gradient(
            180deg,
            rgba(255, 255, 255, 0.03),
            transparent 66%
        );

    color: var(--gf-text);

    cursor: pointer;

    transition: border-color 200ms ease;
}

.gf-nav-toggle:hover {
    border-color: var(--gf-line-bright);
}

.gf-nav-toggle span {
    display: block;

    width: 100%;
    height: 1px;

    margin: 5px 0;

    background: currentColor;

    transition:
        transform 240ms cubic-bezier(0.22, 1, 0.36, 1),
        opacity 200ms ease;
}


/* ----------------------------------------------------------
   05 · FOOTER
   ---------------------------------------------------------- */

.gf-footer {
    position: relative;

    width: 100%;
    margin-top: clamp(19.6px, 2.1vw, 30.8px);

    border-top: 1px solid var(--gf-line-strong);

    background:
        linear-gradient(
            180deg,
            rgba(255, 255, 255, 0.014),
            transparent 40%
        ),
        rgba(5, 5, 6, 0.93);
}

.gf-footer::before {
    content: "";

    position: absolute;
    left: 0;
    top: -1px;

    width: clamp(56px, 11vw, 152px);
    height: 1px;

    background:
        linear-gradient(
            90deg,
            var(--gf-red-bright),
            var(--gf-red-soft)
        );
}

.gf-footer-inner {
    width: min(
        calc(100% - (var(--gf-gutter) * 2)),
        var(--gf-max-width)
    );

    margin-inline: auto;
    padding: 30px 0 34px;

    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;

    gap: 28px 48px;
    align-items: start;
}

.gf-footer-brand {
    display: grid;
    gap: 7px;

    min-width: 0;
}

.gf-footer-brand strong {
    font-family: var(--gf-font-display);
    font-size: 1rem;
    font-weight: var(--gf-w-display);
    letter-spacing: 0.11em;

    color: var(--gf-text-strong);
}

.gf-footer-brand span {
    font-family: var(--gf-mono);
    font-size: 0.63rem;
    letter-spacing: 0.1em;

    color: var(--gf-text-ghost);
}

.gf-footer-nav {
    display: flex;
    flex-wrap: wrap;

    justify-content: flex-end;

    gap: 12px 26px;
}

.gf-footer-nav a {
    min-width: 0;

    font-family: var(--gf-mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    line-height: 1.5;

    color: var(--gf-text-faint);

    transition: color 200ms ease;
}

.gf-footer-nav a:hover {
    color: var(--gf-text-strong);
}

.gf-footer-copy {
    grid-column: 1 / -1;

    margin: 4px 0 0;
    padding-top: 20px;

    border-top: 1px solid var(--gf-line-soft);

    font-family: var(--gf-mono);
    font-size: 0.61rem;
    letter-spacing: 0.14em;

    color: var(--gf-text-ghost);
}


/* ----------------------------------------------------------
   06 · PUSH PANEL
   ---------------------------------------------------------- */

.gf-push-panel {
    width: min(
        calc(100% - (var(--gf-gutter) * 2)),
        var(--gf-max-width)
    );

    margin: clamp(24px, 2.6vw, 36px) auto 0;
}

.gf-push-panel-inner {
    position: relative;

    display: flex;
    justify-content: space-between;
    align-items: center;

    gap: 28px;

    padding: 22px 24px;

    border: 1px solid var(--gf-line);

    background:
        linear-gradient(
            180deg,
            rgba(255, 255, 255, 0.022),
            transparent 46%
        ),
        var(--gf-surface);

    box-shadow: var(--gf-inset-soft);
}

.gf-push-panel-inner::before {
    content: "";

    position: absolute;
    left: -1px;
    top: -1px;

    width: 24px;
    height: 1px;

    background: var(--gf-red-bright);
}

.gf-push-copy {
    display: flex;
    align-items: center;

    gap: 32px;

    min-width: 0;
}

.gf-push-copy > span {
    flex: 0 0 auto;

    font-family: var(--gf-mono);
    font-size: 0.61rem;
    letter-spacing: 0.12em;

    color: var(--gf-text-ghost);
    opacity: 0.74;
}

.gf-push-copy > div {
    min-width: 0;
}

.gf-push-copy strong {
    display: block;
    margin-bottom: 5px;

    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: -0.014em;

    color: var(--gf-text-strong);
}

.gf-push-copy p {
    margin: 0;

    font-size: 0.82rem;
    line-height: 1.6;

    color: var(--gf-text);
}

.gf-push-panel button {
    flex: 0 0 auto;

    min-width: 130px;
    min-height: 46px;

    padding: 13px 20px;

    color: var(--gf-text);

    background-color: transparent;
    background-image:
        linear-gradient(
            180deg,
            rgba(255, 255, 255, 0.03),
            transparent 62%
        );

    border: 1px solid var(--gf-line-strong);
    border-radius: 0;

    box-shadow: var(--gf-inset-soft);

    font-family: var(--gf-mono);
    font-size: 0.69rem;
    letter-spacing: 0.05em;

    cursor: pointer;

    transition:
        color 200ms ease,
        border-color 200ms ease,
        background-color 200ms ease;
}

.gf-push-panel button:hover:not(:disabled) {
    color: var(--gf-text-strong);
    border-color: rgba(158, 51, 44, 0.62);
    background-color: var(--gf-red-wash);
}

.gf-push-panel button:disabled {
    cursor: default;
    color: var(--gf-text-ghost);
    border-color: var(--gf-line-soft);
    background-image: none;
}

.gf-push-panel button[data-state="subscribed"] {
    border-color: rgba(109, 143, 114, 0.44);
    color: var(--gf-text-strong);
}


/* ==========================================================
   MOBILE  ( ≤ 860px )
   ========================================================== */

@media (max-width: 860px) {

    /* -- STICKY · 완전 불투명 (알파/blur 금지) ------------- */

    .gf-header {
        position: sticky;
        top: 0;
        z-index: 1000;

        background-color: #0e0f13;
        background-image: none;

        backdrop-filter: none;
        -webkit-backdrop-filter: none;

        box-shadow: 0 1px 0 rgba(0, 0, 0, 0.9);
    }

    .gf-header-inner {
        height: var(--gf-header-h);
        min-height: var(--gf-header-h);

        padding: 0;
        gap: 16px;

        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .gf-logo {
        min-height: 44px;

        font-size: 0.96rem;
        letter-spacing: 0.1em;
    }

    .gf-nav-toggle {
        display: block;
    }

    /* -- MOBILE NAV PANEL · 완전 불투명 ---------------------- */

    .gf-nav {
        display: none;

        position: absolute;
        z-index: 999;

        top: 100%;
        left: 0;
        right: 0;

        width: 100%;
        padding: 0;

        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0;

        border-top: 1px solid var(--gf-line);
        border-bottom: 1px solid var(--gf-line-strong);

        background-color: #0e0f13;
        background-image: none;

        backdrop-filter: none;
        -webkit-backdrop-filter: none;

        box-shadow: 0 26px 46px rgba(0, 0, 0, 0.7);
    }

    .gf-header.is-nav-open .gf-nav {
        display: grid;
    }

    .gf-nav a {
        display: flex;
        align-items: center;

        min-width: 0;
        min-height: 56px;

        padding: 17px var(--gf-gutter-m);

        font-size: 0.71rem;
        line-height: 1.3;
        letter-spacing: 0.055em;

        border-bottom: 1px solid var(--gf-line-soft);
    }

    .gf-nav a:nth-child(odd) {
        border-right: 1px solid var(--gf-line-soft);
    }

    .gf-nav a::after {
        top: 0;
        bottom: 0;
        right: auto;

        width: 1px;
        height: auto;

        transform: scaleY(0);
        transform-origin: top;
        transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1);
    }

    .gf-nav a[aria-current="page"] {
        color: var(--gf-text-strong);
        background-color: rgba(255, 255, 255, 0.035);
    }

    .gf-nav a[aria-current="page"]::after {
        transform: scaleY(1);
    }

    .gf-nav .gf-application-link {
        grid-column: 1 / -1;

        min-height: 60px;
        margin: 0;
        padding: 19px var(--gf-gutter-m) !important;

        border: 0;
        border-top: 1px solid var(--gf-line);

        background-color: rgba(158, 51, 44, 0.12);
        background-image: none;

        font-weight: 500;
        letter-spacing: 0.09em;
        color: var(--gf-text-strong) !important;
    }

    .gf-nav a.gf-application-link[aria-current="page"] {
        background-color: rgba(158, 51, 44, 0.2);
    }

    /* -- HAMBURGER → CLOSE --------------------------------- */

    .gf-header.is-nav-open .gf-nav-toggle {
        border-color: rgba(158, 51, 44, 0.7);
    }

    .gf-header.is-nav-open .gf-nav-toggle span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }

    .gf-header.is-nav-open .gf-nav-toggle span:nth-child(2) {
        opacity: 0;
    }

    .gf-header.is-nav-open .gf-nav-toggle span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }

    /* -- FOOTER · PUSH -------------------------------------- */

    .gf-footer-inner {
        grid-template-columns: minmax(0, 1fr);

        padding: 30px 0 36px;
        gap: 24px;
    }

    .gf-footer-nav {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));

        justify-content: stretch;

        gap: 0 20px;
    }

    .gf-footer-nav a {
        display: flex;
        align-items: center;

        min-height: 44px;
    }

    .gf-footer-copy {
        grid-column: auto;
        padding-top: 18px;
    }

    .gf-push-panel-inner {
        flex-direction: column;
        align-items: stretch;

        gap: 18px;

        padding: 20px 18px;
    }

    .gf-push-copy {
        flex-direction: column;
        align-items: flex-start;

        gap: 11px;
    }

    .gf-push-panel button {
        width: 100%;
    }
}


@media (max-width: 420px) {

    .gf-header-inner {
        height: var(--gf-header-h-s);
        min-height: var(--gf-header-h-s);
    }

    .gf-logo {
        font-size: 0.88rem;
    }

    .gf-nav a {
        min-height: 52px;
        padding: 15px 14px;
        font-size: 0.67rem;
    }

    .gf-nav .gf-application-link {
        padding: 18px 14px !important;
    }
}


@media (prefers-reduced-motion: reduce) {

    .gf-nav-toggle span,
    .gf-nav a::after {
        transition: none;
    }
}

/* ==========================================================
   UI TYPOGRAPHY · INTERACTIVE CONTROLS
   ----------------------------------------------------------
   기술/기록용 mono는 유지하고,
   실제 조작 UI는 본문 타이포그래피를 따른다.
   ========================================================== */

button,
input[type="button"],
input[type="submit"],
input[type="reset"],
[role="button"] {
    font-family: inherit !important;
    letter-spacing: -0.01em;
}

/* ==========================================================
   MOBILE QA · PUSH PANEL
   ========================================================== */

@media (max-width: 560px) {

    .gf-push-panel {
        margin-top: 28px;
    }

    .gf-push-panel-inner {
        padding-top: 22px;
        padding-bottom: 22px;
    }

    .gf-push-panel-inner button {
        min-height: 50px;
        margin-top: 16px;
    }
}

/* ==========================================================
   GF SHELL MOBILE FINAL TUNE 20260908
   ========================================================== */

@media (max-width: 860px) {

    /* HEADER — 약 5~10% 압축 */
    .gf-header-inner {
        height: 60px;
        min-height: 60px;
    }

    .gf-logo {
        min-height: 40px;
    }

    .gf-nav-toggle {
        width: 42px;
        height: 42px;
        padding: 11px;
    }


    /* FOOTER — 구조/2열 유지, 세로 길이만 압축 */
    .gf-footer-inner {
        padding: 22px 0 26px;
        gap: 16px;
    }

    .gf-footer-brand {
        gap: 5px;
    }

    .gf-footer-nav a {
        min-height: 40px;
    }

    .gf-footer-copy {
        margin-top: 0;
        padding-top: 12px;
    }
}


@media (max-width: 420px) {

    .gf-header-inner {
        height: 56px;
        min-height: 56px;
    }

    .gf-nav-toggle {
        width: 40px;
        height: 40px;
        padding: 10px;
    }
}

/* END · GF SHELL MOBILE FINAL TUNE 20260908 */