/* ==========================================================================
   PCB / Engineering Instrument theme
   Loaded AFTER styles.css (the generated Bootstrap "grayscale/personal"
   theme) so these rules cascade on top of it. Intentionally kept in its own
   file rather than edited into styles.css, which is a large vendored/
   generated file.
   ========================================================================== */

:root {
    --pcb-bg: #08111F;
    --pcb-surface: #111827;
    --pcb-surface-raised: #172235;
    --pcb-border: #23324a;

    --pcb-copper: #D47A1C;
    --pcb-copper-highlight: #F6A623;
    --pcb-solder-gold: #FFD166;

    --pcb-led-blue: #2F80ED;
    --pcb-led-green: #22C55E;
    --pcb-warning-amber: #F59E0B;

    --pcb-text: #E4E9F2;
    --pcb-text-muted: #8B9BB4;

    --pcb-font-heading: 'Space Grotesk', sans-serif;
    --pcb-font-body: 'Inter', sans-serif;
    --pcb-font-mono: 'JetBrains Mono', monospace;

    /* Original theme hard-coded --bs-primary to blue and --bs-secondary to pink
       (see styles.css :root) — every Bootstrap component that reads these
       (badges, links, form validation accents, etc.) inherits that unless we
       redefine the same custom properties here. */
    --bs-primary: var(--pcb-copper);
    --bs-primary-rgb: 212, 122, 28;
    --bs-secondary: var(--pcb-led-blue);
    --bs-secondary-rgb: 47, 128, 237;
    --bs-body-color: var(--pcb-text);
    --bs-body-bg: var(--pcb-bg);
    --bs-border-color: var(--pcb-border);
    --bs-link-color: var(--pcb-led-blue);
}

/* ---------- Base ---------- */
html, body {
    background-color: var(--pcb-bg) !important;
    color: var(--pcb-text);
    font-family: var(--pcb-font-body);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--pcb-font-heading);
}

code, pre, kbd, .font-mono {
    font-family: var(--pcb-font-mono);
}

a {
    color: var(--pcb-led-blue);
}

.text-muted {
    color: var(--pcb-text-muted) !important;
}

/* Copper gradient replaces the old blue/pink gradient everywhere it's used
   (headings via .text-gradient, CTA backgrounds via .bg-gradient-primary-to-secondary) */
.text-gradient {
    background: -webkit-linear-gradient(315deg, var(--pcb-copper) 0%, var(--pcb-solder-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.bg-gradient-primary-to-secondary {
    background: linear-gradient(135deg, var(--pcb-copper) 0%, var(--pcb-solder-gold) 100%) !important;
}

/* Section backgrounds that used to rely on Bootstrap's bg-light/bg-white */
.pcb-section {
    background-color: var(--pcb-bg);
}

.pcb-section-alt {
    background-color: var(--pcb-surface);
}

/* Subtle circuit-grid backdrop, usable on any section */
.pcb-grid-bg {
    position: relative;
}

.pcb-grid-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--pcb-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--pcb-border) 1px, transparent 1px);
    background-size: 44px 44px;
    opacity: 0.06;
    pointer-events: none;
}

/* ---------- Buttons ---------- */
.btn-primary {
    background: linear-gradient(135deg, var(--pcb-copper), var(--pcb-copper-highlight));
    border-color: var(--pcb-copper-highlight);
    color: #08111F;
    transition: box-shadow .25s ease, transform .2s ease;
}

.btn-primary:hover, .btn-primary:focus {
    background: linear-gradient(135deg, var(--pcb-copper-highlight), var(--pcb-solder-gold));
    box-shadow: 0 0 0 1px var(--pcb-copper-highlight), 0 0 18px rgba(246, 166, 35, 0.55);
    color: #08111F;
    transform: translateY(-1px);
}

.btn-outline-dark {
    color: var(--pcb-text);
    border-color: var(--pcb-border);
}

.btn-outline-dark:hover {
    background: var(--pcb-surface-raised);
    border-color: var(--pcb-led-blue);
    color: var(--pcb-led-blue);
    box-shadow: 0 0 14px rgba(47, 128, 237, .35);
}

.btn-outline-light:hover {
    box-shadow: 0 0 14px rgba(255, 209, 102, .4);
}

/* Fixed navbar needs the page content pushed down to clear it */
main.flex-shrink-0 {
    padding-top: 76px;
}

/* ---------- Navbar ---------- */
.pcb-navbar {
    background: rgba(8, 17, 31, 0.75) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--pcb-border);
    transition: background .3s ease, border-color .3s ease;
}

.pcb-navbar.pcb-navbar-scrolled {
    background: rgba(8, 17, 31, 0.95) !important;
    border-bottom-color: var(--pcb-copper);
}

.pcb-navbar .navbar-brand span {
    color: var(--pcb-copper-highlight) !important;
    font-family: var(--pcb-font-heading);
    letter-spacing: .05em;
}

.pcb-navbar .nav-link {
    color: var(--pcb-text-muted) !important;
    position: relative;
    padding-top: 1.1rem !important;
}

.pcb-navbar .nav-link::before {
    content: "";
    position: absolute;
    top: 0.35rem;
    left: 50%;
    width: 6px;
    height: 6px;
    background: var(--pcb-border);
    border-radius: 50%;
    transform: translateX(-50%);
    transition: background .25s ease, box-shadow .25s ease;
}

.pcb-navbar .nav-link::after {
    content: "";
    position: absolute;
    top: 0.6rem;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--pcb-copper-highlight);
    transform: translateX(-50%);
    transition: width .25s ease;
}

.pcb-navbar .nav-link:hover,
.pcb-navbar .nav-link.active {
    color: var(--pcb-text) !important;
}

.pcb-navbar .nav-link:hover::before {
    background: var(--pcb-copper-highlight);
    box-shadow: 0 0 6px var(--pcb-copper-highlight);
}

.pcb-navbar .nav-link:hover::after {
    width: 20px;
}

.pcb-navbar .navbar-toggler {
    border-color: var(--pcb-border);
}

/* ---------- IC-package cards (project-card / blog-card) ---------- */
.project-card, .blog-card {
    background: var(--pcb-surface) !important;
    border: 1px solid var(--pcb-border) !important;
    color: var(--pcb-text);
    position: relative;
}

.project-card {
    border-radius: 10px !important;
}

.project-card::before, .project-card::after {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    height: 3px;
    background-image: repeating-linear-gradient(90deg, var(--pcb-copper) 0 8px, transparent 8px 16px);
    opacity: .8;
}

.project-card::before { top: -3px; }
.project-card::after { bottom: -3px; }

.blog-card {
    border-left: 4px solid var(--pcb-copper) !important;
}

.project-card:hover, .blog-card:hover {
    border-color: var(--pcb-copper-highlight) !important;
    box-shadow: 0 0 0 1px var(--pcb-copper-highlight), 0 10px 30px rgba(212, 122, 28, .18) !important;
}

.project-title, .blog-title, .blog-title a {
    color: var(--pcb-text) !important;
}

.project-subtitle, .blog-subtitle, .blog-excerpt {
    color: var(--pcb-text-muted) !important;
}

.blog-meta {
    color: var(--pcb-copper-highlight) !important;
}

.blog-tag {
    background: var(--pcb-surface-raised) !important;
    color: var(--pcb-led-blue) !important;
    border: 1px solid var(--pcb-border);
}

/* Generic dark surface box, for places that used to be bg-light/bg-white */
.pcb-card {
    background: var(--pcb-surface) !important;
    border: 1px solid var(--pcb-border);
}

/* Bootstrap's base .card (only resume.html uses it directly) */
.card {
    background: var(--pcb-surface) !important;
    border-color: var(--pcb-border) !important;
    color: var(--pcb-text);
}

.text-secondary {
    color: var(--pcb-text-muted) !important;
}

.admin-panel {
    border-color: var(--pcb-border) !important;
    color: var(--pcb-text-muted);
}

/* ---------- Filter chips -> tiny switches ---------- */
.filter-chip {
    background: var(--pcb-surface-raised) !important;
    color: var(--pcb-text-muted) !important;
    border: 1px solid var(--pcb-border) !important;
}

.filter-chip.active {
    background: var(--pcb-copper) !important;
    color: #08111F !important;
    border-color: var(--pcb-copper-highlight) !important;
    box-shadow: 0 0 10px rgba(246, 166, 35, .5);
}

/* ---------- Hero ---------- */
.pcb-hero {
    position: relative;
    overflow: hidden;
}

.pcb-hero-badge {
    display: inline-block;
    font-family: var(--pcb-font-mono);
    font-size: .75rem;
    letter-spacing: .1em;
    color: var(--pcb-led-green);
    border: 1px solid var(--pcb-border);
    background: var(--pcb-surface);
    padding: .35rem .9rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
}

.pcb-hero-badge::before {
    content: "\25CF  ";
    color: var(--pcb-led-green);
}

.pcb-hero-tagline {
    color: var(--pcb-text-muted);
    font-size: 1.15rem;
    max-width: 32rem;
}

/* Big hero globe with gallery photos sliding along its equator: each photo travels
   in a straight line left-to-right through the globe's horizontal middle, growing
   to full size as it crosses dead-center and shrinking again as it moves past. */
.pcb-globe-orbit {
    position: relative;
    width: 580px;
    height: 340px;
    max-width: 100%;
}

.pcb-globe {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300px;
    height: 300px;
    transform: translate(-50%, -50%);
    z-index: 1;
    filter: drop-shadow(0 0 30px rgba(47, 128, 237, .45));
}

.pcb-globe-meridians {
    transform-origin: 50px 50px;
    animation: spinGlobe 16s linear infinite;
}

@keyframes spinGlobe {
    to { transform: rotate(360deg); }
}

.pcb-orbit-item {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 168px;
    height: 112px;
    margin: -56px 0 0 -84px;
    border-radius: 12px;
    overflow: hidden;
    border: 2px solid var(--pcb-copper);
    box-shadow: 0 14px 34px rgba(0, 0, 0, .6);
    animation: equatorPass 16s linear infinite;
    animation-delay: calc(var(--i) / var(--n) * -16s);
}

.pcb-orbit-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 50% = dead-center of the equator, full size and on top. 0%/100% = off to either
   side, shrunk (with a brief fade so the wrap-around loop point isn't a visible jump). */
@keyframes equatorPass {
    0%   { transform: translateX(-270px) scale(.5);  opacity: .5; z-index: 1; }
    8%   { opacity: 1; }
    50%  { transform: translateX(0)      scale(1.4); opacity: 1; z-index: 5; }
    92%  { opacity: 1; }
    100% { transform: translateX(270px)  scale(.5);  opacity: .5; z-index: 1; }
}

@media (max-width: 576px) {
    .pcb-globe-orbit { width: 340px; height: 260px; }
    .pcb-globe { width: 200px; height: 200px; }
    .pcb-orbit-item { width: 108px; height: 72px; margin: -36px 0 0 -54px; }
    @keyframes equatorPass {
        0%   { transform: translateX(-150px) scale(.5);  opacity: .5; z-index: 1; }
        8%   { opacity: 1; }
        50%  { transform: translateX(0)      scale(1.35); opacity: 1; z-index: 5; }
        92%  { opacity: 1; }
        100% { transform: translateX(150px)  scale(.5);  opacity: .5; z-index: 1; }
    }
}

@media (prefers-reduced-motion: reduce) {
    .pcb-globe-meridians, .pcb-orbit-item {
        animation: none !important;
    }
}

/* ---------- Footer ---------- */
.pcb-footer-cta {
    background: var(--pcb-surface) !important;
    border-top: 1px solid var(--pcb-border);
    border-bottom: 1px solid var(--pcb-border);
}

.pcb-footer-cta h2 {
    color: var(--pcb-text);
}

footer.pcb-footer {
    background: var(--pcb-bg) !important;
    border-top: 1px solid var(--pcb-border);
    font-family: var(--pcb-font-mono);
    font-size: .8rem;
    color: var(--pcb-text-muted) !important;
}

.pcb-status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--pcb-led-green);
    box-shadow: 0 0 6px var(--pcb-led-green);
    margin-right: .4rem;
    animation: ledBlink 2s ease-in-out infinite;
}