/* ===== BLOCK INSTANCES ===== */
.nexo {
    --cx: var(--cx-left);
    --cy: var(--cy-left);
    --accent: var(--color-accent-nexo);
}

.portfolio {
    --cx: var(--cx-right);
    --cy: var(--cy-right);
    --accent: var(--color-accent-portfolio);
}

/* ===== CIRCLES ===== */
.block .circle {
    position: absolute;
    z-index: 2;
    width: calc(var(--r) * 2);
    height: calc(var(--r) * 2);
    border-radius: 50%;
    background: var(--accent);
    left: calc(var(--cx) - var(--r));
    top: calc(var(--cy) - var(--r));
    transition: transform 0.25s ease;
    cursor: pointer;
    will-change: transform;
}

.block .circle:hover { 
    transform: scale(0.9); 
}

.block .circle.is-expanding {
    transform: scale(50);
    transition: transform 800ms ease-in-out;
    z-index: 999;
}

/* ===== TEXT ===== */
.block .text {
    position: absolute;
    z-index: 3;
    color: var(--color-text);
    line-height: 1.25;
}

.block .text h1 {
    margin: 0 0 6px;
    font-size: var(--h1);
    font-weight: 700;
}

.block .text p {
    margin: 0;
    font-size: var(--p);
    color: var(--color-text-light);
}

/* ===== RECTANGLES ===== */
.block .rect {
    position: absolute;
    z-index: 1;
    background: transparent;
    border-radius: 30px;
    border: 3px solid transparent;
    -webkit-mask: linear-gradient(#000 0 0) padding-box, linear-gradient(#000 0 0);
    mask: linear-gradient(#000 0 0) padding-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    background: repeating-conic-gradient(
        from 0deg,
        var(--accent) 0 var(--dash),
        transparent var(--dash) calc(var(--dash) + var(--gap))
    ) border-box;
}

.nexo .rect,
.portfolio .rect { 
    display: none; 
}

/* ===== ARROWS ===== */
.arrow-link {
    text-decoration: none;
    color: inherit;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
}

.arrow {
    display: inline-block;
    transition: transform 0.2s ease;
    margin: 0 6px;
    width: 24px;
    height: 24px;
    position: relative;
    background-color: var(--accent);
    border-radius: 50%;
}

.arrow::before {
    content: "";
    position: absolute;
    top: 50%; 
    left: 50%;
    width: 8px; 
    height: 8px;
    border-top: 2px solid var(--color-white);
    border-right: 2px solid var(--color-white);
    transform: translate(-50%, -50%) rotate(45deg);
}

.arrow-left::before { 
    transform: translate(-30%, -50%) rotate(-135deg); 
}

.arrow:hover { 
    transform: translateX(-4px); 
}

.arrow-right:hover { 
    transform: translateX(4px); 
}

/* ===== NAVIGATION ===== */
.nav-pill-container {
    display: flex;
    justify-content: center;
    margin-bottom: var(--sp-4);
}

.nav-pill {
    width: var(--nav-pill-width);
    max-width: 1200px;
    border: 3px solid var(--c-accent);
    border-radius: var(--r-outer);
    background: var(--color-bg);
    padding: var(--sp-2) var(--sp-3);
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    position: relative;
}

.nav-item { 
    position: relative; 
    padding: var(--sp-2) var(--sp-3); 
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    padding: var(--sp-1) var(--sp-2);
    border-radius: 8px;
    transition: background-color 0.2s;
}

.nav-link:hover,
.nav-link:focus,
.nav-link.active {
    background: var(--c-accent-weak);
    outline: none;
}

.submenu {
    position: absolute;
    left: 0; 
    top: 100%;
    min-width: 200px;
    background: var(--color-bg);
    border: 2px solid var(--c-accent);
    border-radius: 0 0 var(--r-card) var(--r-card);
    padding: var(--sp-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
}

.nav-item:hover .submenu,
.nav-item:focus-within .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu a {
    display: block;
    padding: var(--sp-2);
    color: var(--color-text);
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.8rem;
}

.submenu a:hover { 
    background: var(--c-accent-weak); 
}

.nav-link:focus-visible,
.submenu a:focus-visible,
.arrow-link:focus-visible,
.popup-button:focus-visible {
    outline: 3px solid var(--c-accent-dark);
    outline-offset: 3px;
}

/* ===== PROJECTS GRID ===== */
.projects-container {
    display: flex;
    justify-content: center;
    margin-bottom: var(--sp-3);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(var(--icon-size), 1fr));
    gap: var(--sp-3);
    max-width: calc(var(--icon-size) * 6 + var(--sp-3) * 5);
    justify-content: center;
}

.project-icon {
    width: var(--icon-size);
    height: var(--icon-size);
    border-radius: var(--r-icon);
    background: var(--c-accent-weak);
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.project-icon:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,.1);
}

.project-icon.active {
    background: var(--c-accent-weak);
    border: 2px solid var(--c-accent);
}

.project-icon.dimmed { 
    opacity: .3; 
    pointer-events: none; 
}

.project-icon img { 
    width: 80%; 
    height: 80%; 
    object-fit: contain; 
}

.text-icon {
    width: 100%; 
    height: 100%;
    display: flex; 
    align-items: center; 
    justify-content: center;
    font-weight: 600;
    color: var(--c-accent-dark);
    background: var(--c-accent-weak);
    border-radius: var(--r-icon);
}

/* ===== BASELINE & FOOTER ===== */
.baseline-container {
    display: flex;
    justify-content: center;
    margin-bottom: var(--sp-2);
}

.baseline {
    width: 100%;
    max-width: 800px;
    height: 0;
    border-bottom: 1px dashed transparent;
    background: repeating-linear-gradient(
        90deg,
        var(--c-accent) 0 var(--dash),
        transparent var(--dash) calc(var(--dash) + var(--gap))
    );
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    padding-bottom: 3px;
}

.copyright {
    text-align: center;
    color: var(--color-dimmed);
    font-size: 12px;
    margin-bottom: var(--sp-3);
}

.content-spacer { 
    flex: 1; 
    min-height: 40vh; 
}

/* ===== MODAL ===== */
.popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,.9);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s ease;
}

.popup-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.popup-card {
    background: var(--color-bg);
    border: 1px solid rgba(34, 34, 34, 0.06);
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(34, 34, 34, 0.12);
    padding: 32px;
    max-width: 560px;
    width: min(92vw, 560px);
    max-height: min(88svh, 720px);
    overflow: auto;
    position: relative;
    transform: translateY(20px);
    transition: transform .3s ease;
}

.popup-overlay.active .popup-card { 
    transform: translateY(0); 
}

.popup-close {
    position: absolute;
    top: var(--sp-3); 
    right: var(--sp-3);
    background: none; 
    border: none;
    font-size: 24px; 
    cursor: pointer;
    color: var(--color-muted);
}

.popup-title {
    max-width: calc(100% - 44px);
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    line-height: 1.2;
    letter-spacing: -0.025em;
    font-weight: 700;
    margin: 0 0 14px;
    text-align: left;
}

.popup-excerpt { 
    color: var(--color-muted); 
    font-size: clamp(0.875rem, 1.8vw, 1rem);
    line-height: 1.65;
    margin: 0 0 20px;
}

.popup-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    min-height: 180px;
    background: var(--c-accent-weak);
    border-radius: 12px;
    margin-bottom: 16px;
    display: grid;
    place-items: center;
    overflow: hidden;
    color: var(--color-muted);
}

.popup-image-element {
    display: block;
    height: 100%;
    width: auto;
    max-width: none;
    max-height: none;
    object-fit: initial;
}

.popup-categories { 
    border-top: 1px solid rgba(34, 34, 34, 0.08);
    padding-top: 14px;
    font-size: 0.75rem;
    line-height: 1.5;
    color: var(--color-muted); 
    margin-bottom: 20px;
}

.popup-actions { 
    display: flex; 
    justify-content: flex-end; 
}

.popup-button {
    background: var(--c-accent); 
    color: var(--color-white);
    border: none; 
    border-radius: 8px;
    min-height: 40px;
    padding: 10px 16px;
    font-size: 0.8125rem;
    font-family: "JetBrains Mono", monospace;
    font-weight: 500; 
    cursor: pointer;
    transition: background-color .2s;
}

.popup-button:hover { 
    background: var(--c-accent-dark); 
}

.popup-button:disabled,
.download-button.is-disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
}

.download-button.is-disabled {
    display: inline-block;
}

/* Close button base style (always visible) */
.popup-close{
  --ring: color-mix(in oklab, var(--c-accent) 35%, transparent);
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 1px dashed var(--color-connector);
  border-radius: 8px;
  background: var(--color-white);
  color: var(--color-text);
  cursor: pointer;
  outline: none;                /* remove default outline */
  transition: box-shadow .15s ease, transform .15s ease, opacity .15s ease;
}
.popup-close:hover{ transform: scale(1.04); }
.popup-close:focus-visible{
  /* custom, subtle focus ring */
  box-shadow: 0 0 0 3px var(--ring);
}
/* If your browser still paints an outline, force it off */
.popup-close:focus{ outline: none; }

@media (max-width: 480px) {
  .popup-card { padding: 24px 20px; }
  .popup-image { min-height: 150px; }
  .popup-actions { justify-content: stretch; }
  .popup-button { width: 100%; }
}

/* ===== Academic portfolio visual language ===== */
.nexonest-theme .container {
    position: relative;
}

.nexonest-theme .container::before {
    content: "";
    position: absolute;
    top: -24px;
    right: 0;
    width: 180px;
    height: 120px;
    pointer-events: none;
    opacity: .62;
    background-image:
        radial-gradient(circle, var(--c-accent-nexo) 0 2.5px, transparent 3px),
        radial-gradient(circle, var(--c-accent-portfolio) 0 2.5px, transparent 3px);
    background-size: 24px 24px;
    background-position: 0 0, 12px 12px;
    -webkit-mask-image: linear-gradient(225deg, #000, transparent 76%);
    mask-image: linear-gradient(225deg, #000, transparent 76%);
}

.nexonest-theme .header {
    position: relative;
    z-index: 1;
}

.nexonest-theme .logo {
    width: 72px;
    height: 72px;
    background: transparent;
}

.nexonest-theme .nav-pill {
    border-width: 1px;
    border-style: dotted;
    border-radius: 10px;
    background: transparent;
}

.nexonest-theme .submenu {
    border-width: 1px;
    background: var(--color-bg-alt);
}

.nexonest-theme .project-icon {
    border: 1px solid transparent;
    background: transparent;
    transition: border-color .18s ease, background-color .18s ease;
}

.nexonest-theme .project-icon:hover,
.nexonest-theme .project-icon.active {
    border-color: var(--c-accent);
    background: rgba(255, 255, 255, .28);
    box-shadow: none;
    transform: none;
}

.nexonest-theme .popup-overlay {
    background: rgba(232, 241, 240, .9);
}

.nexonest-theme .popup-card {
    border: 1px dotted var(--c-accent-dark);
    border-radius: 10px;
    background: var(--color-bg-alt);
    box-shadow: 12px 12px 0 rgba(127, 183, 168, .13);
}