:root {
    --nav-height: 80px;
}

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

body {
    --bg: #ffffff;
    --fg: #111111;
    font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    background: #ffffff;
    color: #111111;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

body.backdrop-light {
    --bg: #ffffff;
    --fg: #111111;
    background: #ffffff;
    color: #111111;
}

body.backdrop-dark {
    --bg: #222222;
    --fg: #f0f0f0;
    background: #222222;
    color: #f0f0f0;
}

/* ── Header ── */

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
}

.wordmark {
    font-size: 1.7rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    text-decoration: none;
    color: inherit;
}

/* ── Nav ── */

nav {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    font-size: 0.85rem;
    font-weight: 300;
    letter-spacing: 0.03em;
    text-transform: lowercase;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    padding: 0.25rem 0;
    display: inline-block;
}

.nav-link:hover,
.nav-link.active {
    color: #5ba89a;
}

.nav-item:has(.dropdown) .nav-link {
    position: relative;
    padding-right: 1em;
}

.nav-item:has(.dropdown) .nav-link::after {
    content: "▾";
    font-size: 1.8em;
    opacity: 0.7;
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-54%);
}

/* ── Dropdowns ── */

.dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 120px;
    background: #ffffff;
    border: 1px solid #eee;
    padding: 0.5rem 0;
    z-index: 100;
}

body.backdrop-dark .dropdown {
    background: #1a1a1a;
    border-color: #333;
}

.nav-item:hover .dropdown {
    display: block;
}

.dropdown a {
    display: block;
    padding: 0.35rem 1rem;
    font-size: 0.82rem;
    font-weight: 300;
    letter-spacing: 0.06em;
    text-decoration: none;
    color: inherit;
    white-space: nowrap;
}

.dropdown a:hover,
.dropdown a.active {
    color: #5ba89a;
}

/* ── Main content ── */

main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

/* ── Footer ── */

footer {
    padding: 1.5rem 2rem;
    text-align: right;
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    color: #999;
}

body.backdrop-dark footer {
    color: #666;
}

/* ── Viewer ── */

.viewer-page {
    overflow: hidden;
}

.viewer-page main {
    padding: 0;
    align-items: stretch;
}

.viewer-wrap {
    position: relative;
    height: calc(100vh - var(--nav-height));
    width: 100%;
}

.viewer-image-area {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.viewer-img {
    position: absolute;
    top: calc(50% - 20px);
    left: calc(50% - 55px);
    transform: translate(-50%, -50%);
    max-width: calc(100% - 160px);
    max-height: calc(100% - 80px);
    object-fit: contain;
    display: block;
    transition: opacity 300ms ease;
}

.viewer-img-a { z-index: 2; }
.viewer-img-b { z-index: 1; opacity: 0; }

.viewer-footer {
    position: absolute;
    bottom: 24px;
    right: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0;
}

.viewer-copyright {
    position: absolute;
    bottom: 8px;
    right: 24px;
    font-size: 0.65rem;
    font-weight: 300;
    letter-spacing: 0.04em;
    opacity: 0.25;
}

.viewer-footer a {
    text-decoration: none;
    color: inherit;
    font-size: 0.85rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    opacity: 0.5;
}

.viewer-footer a:hover {
    color: #5ba89a;
    opacity: 1;
}

.viewer-nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.viewer-counter-wrap {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 4px;
}

.viewer-counter {
    font-size: 0.8rem;
    opacity: 0.5;
}

.viewer-jump-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
    opacity: 0.3;
    font-size: 0.7rem;
    padding: 0;
    line-height: 1;
}

.viewer-jump-btn:hover { opacity: 1; }

.viewer-grid-btn {
    display: flex;
    align-items: center;
    gap: 0.4em;
    cursor: pointer;
    opacity: 0.5;
}

.viewer-grid-btn:hover { opacity: 1; }

.viewer-grid-icon { display: block; }

.viewer-key-hint {
    font-size: 0.85rem;
    font-weight: 300;
    letter-spacing: 0.05em;
}

.viewer-image-area--advance {
    cursor: pointer;
}

/* Grid overlay */
.grid-overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: var(--bg);
    display: flex;
    flex-direction: column;
}

.grid-overlay[hidden] {
    display: none;
}

.grid-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 64px;
    flex-shrink: 0;
}

.grid-count {
    font-size: 0.8rem;
    opacity: 0.5;
}

.grid-key-cluster {
    display: inline-grid;
    grid-template-columns: 1.4em 2.8em 1.4em;
    grid-template-rows: repeat(3, 1.2em);
    align-items: center;
    justify-items: center;
    gap: 1px;
}

.grid-key {
    font-size: 0.65rem;
    font-weight: 300;
    opacity: 0.35;
    line-height: 1;
}

.grid-key-esc {
    font-size: 0.55rem;
    letter-spacing: 0.05em;
    opacity: 0.35;
    line-height: 1;
}

.grid-key-enter {
    font-size: 0.5rem;
    letter-spacing: 0.02em;
    opacity: 0.35;
    line-height: 1;
}

.grid-close-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.grid-footer-bar {
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 24px;
    flex-shrink: 0;
}

.grid-copyright {
    font-size: 0.65rem;
    font-weight: 300;
    letter-spacing: 0.04em;
    opacity: 0.25;
}

.grid-close-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--fg);
    opacity: 0.6;
    padding: 8px;
}

.grid-close-btn:hover {
    opacity: 1;
}

.grid-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    grid-auto-rows: 220px;
    gap: 16px;
    align-content: start;
}

.grid-thumb {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    width: 100%;
    overflow: hidden;
    position: relative;
}

.grid-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transition: opacity 0.15s;
}

.grid-thumb:hover img {
    opacity: 0.8;
}

.grid-thumb--current::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 2px solid var(--fg);
    pointer-events: none;
}

.viewer-grid-btn {
    background: none;
    border: none;
    color: inherit;
}

/* ── Favorite button ── */

.viewer-fav-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.3rem;
    color: var(--fg);
    opacity: 0.5;
    padding: 4px 8px;
}
.viewer-fav-btn:hover { opacity: 1; }
.viewer-fav-btn--active {
    opacity: 1;
    color: #f5c518;
}
.viewer-dl-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    color: var(--fg);
    opacity: 0.5;
    padding: 4px 8px;
    text-decoration: none;
}
.viewer-dl-btn:hover { opacity: 1; }

/* ── Gate ── */

.gate-wrap {
    display: flex;
    width: 100%;
    max-width: 900px;
    gap: 4rem;
    align-items: center;
}

.gate-wrap--landscape {
    flex-direction: column;
    max-width: 700px;
    align-items: stretch;
}

.gate-cover {
    flex: 1;
    min-width: 0;
}

.gate-cover img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
    max-height: 70vh;
}

.gate-wrap--landscape .gate-cover img {
    max-height: 50vh;
}

.gate-form-panel {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.gate-title {
    font-size: 1.6rem;
    font-weight: 300;
    letter-spacing: 0.04em;
}

.gate-error {
    color: #c0392b;
    font-size: 0.85rem;
}

body.backdrop-dark .gate-error {
    color: #e74c3c;
}

.gate-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.gate-form input {
    background: transparent;
    border: none;
    border-bottom: 1px solid currentColor;
    color: inherit;
    font-size: 0.9rem;
    font-family: inherit;
    padding: 0.4rem 0;
    outline: none;
    opacity: 0.8;
    width: 100%;
}

.gate-form input:focus {
    opacity: 1;
    border-bottom-color: #5ba89a;
}

.gate-form button {
    align-self: flex-start;
    margin-top: 0.5rem;
    background: none;
    border: 1px solid currentColor;
    color: inherit;
    font-size: 0.85rem;
    font-family: inherit;
    letter-spacing: 0.1em;
    padding: 0.5rem 1.5rem;
    cursor: pointer;
    opacity: 0.8;
}

.gate-form button:hover {
    opacity: 1;
    border-color: #5ba89a;
    color: #5ba89a;
}

.gate-contact {
    font-size: 0.8rem;
    opacity: 0.5;
}

.gate-contact a {
    color: inherit;
    text-decoration: none;
}

.gate-contact a:hover {
    opacity: 1;
    color: #5ba89a;
}

@media (max-width: 600px) {
    .gate-wrap {
        flex-direction: column;
        gap: 2rem;
    }
}

/* Contact page — extra spacing between fields, textarea style */
.gate-form--contact {
  gap: 1.5rem;
}

.gate-form textarea {
  background: transparent;
  border: none;
  border-bottom: 1px solid currentColor;
  color: inherit;
  font-size: 0.9rem;
  font-family: inherit;
  padding: 0.4rem 0;
  outline: none;
  opacity: 0.8;
  width: 100%;
  resize: vertical;
  box-sizing: border-box;
}

.gate-form textarea:focus {
  opacity: 1;
  border-bottom-color: #5ba89a;
}

.contact-success {
  font-size: 1.1rem;
  opacity: 0.7;
}

/* ── Mobile nav ── */

.nav-hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
    padding: 8px;
    line-height: 0;
}

.mobile-menu-backdrop {
    position: fixed;
    inset: 0;
    z-index: 290;
    pointer-events: none;
}

.mobile-menu-backdrop.is-open {
    pointer-events: auto;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 10vw;
    background: var(--bg);
    z-index: 300;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateX(110%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.mobile-menu.is-open {
    transform: translateX(0);
    pointer-events: auto;
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    height: 60px;
    padding: 0 1.5rem;
}

.mobile-menu-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: inherit;
    opacity: 0.6;
    padding: 8px;
}

.mobile-menu-close:hover { opacity: 1; }

.mobile-menu-nav {
    display: block;
    padding: 0 2rem 3rem;
}

.mobile-menu-section {
    padding: 1rem 0;
}

.mobile-menu-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    text-transform: lowercase;
    color: inherit;
    opacity: 0.4;
    margin-bottom: 0.6rem;
}

.mobile-menu-label--active {
    color: #5ba89a;
    opacity: 1;
}

.mobile-menu-item {
    display: block;
    font-size: 1.3rem;
    font-weight: 300;
    letter-spacing: 0.01em;
    text-decoration: none;
    color: inherit;
    padding: 0.35rem 0;
}

.mobile-menu-item--active { color: #5ba89a; }
.mobile-menu-item:hover   { color: #5ba89a; }

.mobile-menu-divider {
    border: none;
    border-top: 1px solid #e0e0e0;
    margin: 0;
}

body.backdrop-dark .mobile-menu-divider {
    border-top-color: #333;
}

.mobile-image-list {
    display: none;
}

/* ── Mobile breakpoint ── */

@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
    }

    header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 200;
        padding: 0 1.5rem;
        height: var(--nav-height);
        background: var(--bg);
        transition: transform 0.25s ease;
    }

    header.header--hidden {
        transform: translateY(-100%);
    }

    header nav {
        display: none;
    }

    .nav-hamburger {
        display: flex;
        align-items: center;
    }

    body {
        padding-top: var(--nav-height);
    }

    body.viewer-page {
        overflow-y: auto;
    }

    .viewer-page main {
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
    }

    .viewer-wrap {
        display: none;
    }

    .grid-overlay {
        display: none !important;
    }

    .mobile-image-list {
        display: block;
        padding: 0 20px;
    }

    .mobile-image-list img {
        display: block;
        width: 100%;
        height: auto;
        margin-bottom: 20px;
    }

    .mobile-image-list img:last-child {
        margin-bottom: 0;
    }
}