/* TSC custom styles */

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Reduce top spacing below fixed nav — half of default py-16 / lg:py-24 */
main > section:first-child {
    padding-top: 2rem;   /* 32px, half of 64px (py-16) */
}

@media (min-width: 1024px) {
    main > section:first-child {
        padding-top: 3rem; /* 48px, half of 96px (lg:py-24) */
    }
}

/* Nav shadow on scroll */
.nav-scrolled {
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

/* Topbar positioning */
.nav-topbar {
    height: 54px;
    transition: transform 0.3s ease;
}
.nav-topbar-inner {
    height: 54px;
}

/* Main nav follows topbar on lg+ */
@media (min-width: 1024px) {
    .nav-main {
        top: 54px;
        transition: top 0.3s ease, box-shadow 0.3s ease;
    }
    .nav-main.topbar-collapsed {
        top: 0;
    }
}

/* Topbar hide on scroll */
.nav-topbar.topbar-collapsed {
    transform: translateY(-100%);
}

/* Spacer responsive heights */
.nav-spacer {
    height: 64px;
}
@media (min-width: 1024px) {
    .nav-spacer {
        height: 118px;
    }
}

/* Hero 7-step circle animation */
.step-circle {
    translate: -50% -50%;
    opacity: 0;
    scale: 0.8;
    animation: stepAppear 0.5s ease-out forwards;
}

@keyframes stepAppear {
    to {
        opacity: 1;
        scale: 1;
    }
}

/* nth-child offset +2: child 1 = center logo, child 2 = arrow SVG */
.step-circle:nth-child(3)  { animation-delay: 0.2s; }
.step-circle:nth-child(4)  { animation-delay: 0.6s; }
.step-circle:nth-child(5)  { animation-delay: 1.0s; }
.step-circle:nth-child(6)  { animation-delay: 1.4s; }
.step-circle:nth-child(7)  { animation-delay: 1.8s; }
.step-circle:nth-child(8)  { animation-delay: 2.2s; }
.step-circle:nth-child(9)  { animation-delay: 2.6s; }

/* Arrow draw-in animation */
.step-arrow {
    fill: none;
    stroke: #8ebe21;
    stroke-width: 1.2;
    stroke-linecap: butt;
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
    animation: drawArrow 0.4s ease-out forwards;
}

@keyframes drawArrow {
    to { stroke-dashoffset: 0; }
}

.step-arrow:nth-of-type(1) { animation-delay: 0.5s; }
.step-arrow:nth-of-type(2) { animation-delay: 0.9s; }
.step-arrow:nth-of-type(3) { animation-delay: 1.3s; }
.step-arrow:nth-of-type(4) { animation-delay: 1.7s; }
.step-arrow:nth-of-type(5) { animation-delay: 2.1s; }
.step-arrow:nth-of-type(6) { animation-delay: 2.5s; }

/* FAQ accordion */
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.faq-answer.open {
    max-height: 500px;
}

.faq-chevron {
    transition: transform 0.3s ease;
}

.faq-chevron.open {
    transform: rotate(180deg);
}

/* Reference logo grid hover */
.reference-logo {
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all 0.3s ease;
}

.reference-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
}

/* Reference card on /references: the whole card is the hover target, so the logo and its
   caption light up together. The caption is real text in the DOM (not a title attribute),
   which is what actually gets indexed - alt text only feeds image search. */
.logo-card:hover .reference-logo {
    filter: grayscale(0%);
    opacity: 1;
}

.reference-name {
    color: #9a9ea0;
    transition: color 0.3s ease;
}

.logo-card:hover .reference-name {
    color: #212529;
}

/* Homepage logo wall — "breathing grid": the grid itself never moves, each tile cross-fades
   through its own queue of logos (see Client/site/logo-wall.ts).
   `display: contents` is the graceful-degradation path for the no-JS case: every logo drops
   straight into the parent grid, so all of them render as a plain static wall. (Reduced motion
   deliberately does NOT take that path - see the media query at the bottom of this file.)
   Only when html.js is present does a tile become a positioned box stacking its frames. */
.logo-slot {
    display: contents;
}

/* in the fallback the frames are grid items themselves, so they need the breathing room the
   tile's own padding gave them (margin, not padding — padding would shrink the logo box) */
.logo-frame {
    margin: 0.5rem auto;
}

.js .logo-slot {
    position: relative;
    display: flex;
    min-height: 5rem;
}

.js .logo-frame {
    position: absolute;
    inset: 0;
    margin: auto;
    /* overrides `transition: all 0.3s` from .reference-logo so the swap is a slow cross-fade
       while the hover colour-in stays snappy */
    transition: opacity 0.6s ease, transform 0.6s ease, filter 0.3s ease;
}

/* the active frame keeps .reference-logo's own opacity (0.6) and hover behaviour */
.js .logo-frame:not(.is-active) {
    opacity: 0;
    transform: scale(0.96);
    pointer-events: none;
}

/* Scroll reveal animation — armed only when JS is present (html.js set inline in _Layout),
   so content stays visible for non-JS crawlers and when scripts fail to load */
.js .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Timeline */
.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #e8e8e8;
    transform: translateX(-50%);
}

@media (max-width: 768px) {
    .timeline-line {
        left: 20px;
    }
}

/* Contact form focus styles */
.form-input:focus {
    outline: none;
    border-color: #8ebe21;
    box-shadow: 0 0 0 3px rgba(142, 190, 33, 0.15);
}

/* TSC City hotspot animations */
.tsc-hotspot {
    cursor: pointer;
}

.tsc-hotspot-outer {
    fill: #8ebe21;
    opacity: 0.5;
    transform-origin: center;
    transform-box: fill-box;
    animation: tsc-pulse-1 3s ease-in-out infinite;
}

.tsc-hotspot:nth-of-type(even) .tsc-hotspot-outer {
    animation: tsc-pulse-2 4s ease-in-out infinite;
}

.tsc-hotspot-inner {
    fill: #ffffff;
    transition: fill 0.2s ease;
}

.tsc-hotspot:hover .tsc-hotspot-outer,
.tsc-hotspot.active .tsc-hotspot-outer {
    fill: #fcd200;
    opacity: 0.7;
    animation: none;
}

.tsc-hotspot:hover .tsc-hotspot-inner,
.tsc-hotspot.active .tsc-hotspot-inner {
    fill: #fcd200;
}

.tsc-hotspot:focus-visible {
    outline: 2px solid #008ad1;
    outline-offset: 4px;
    border-radius: 50%;
}

@keyframes tsc-pulse-1 {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

@keyframes tsc-pulse-2 {
    0%, 100% { transform: scale(1); }
    33% { transform: scale(0.85); }
    66% { transform: scale(1.15); }
}

/* ── Explainer film ─────────────────────────────────────────────────────────
   The cover replaces the film's own first frame with something of ours: logo,
   play button, name and running time. It is drawn only under `.js`, because a
   cover that hides the native controls without being able to start playback
   would be a dead end - with scripting off the visitor gets the plain <video>
   with its poster, which plays on its own. */
.film-frame {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    background: #0C0F0D;
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}
.film-video {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #0C0F0D;
}

.film-cover {
    display: none;
}
.js .film-cover {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1.5rem;
    border: 0;
    cursor: pointer;
    text-align: center;
    /* The film's own ground. The green stays in the button, not in the backdrop -
       a wash behind it only turns the black olive and swallows the button. */
    background:
        radial-gradient(75% 60% at 50% 42%, rgb(142 190 33 / 0.09), transparent 72%),
        #0C0F0D;
    transition: opacity 0.3s ease, visibility 0s 0.3s;
}
.film-frame.is-playing .film-cover {
    opacity: 0;
    visibility: hidden;
}
.film-cover:focus-visible {
    outline: 3px solid #8ebe21;
    outline-offset: -3px;
}

.film-cover-logo {
    position: absolute;
    top: 1.75rem;
    left: 1.75rem;
    height: 2rem;
    width: auto;
    opacity: 0.85;
    filter: brightness(0) invert(1);
}

.film-play {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 5.25rem;
    height: 5.25rem;
    margin-bottom: 1.25rem;
    border-radius: 9999px;
    background: #8ebe21;
    color: #0C0F0D;
    box-shadow: 0 10px 30px rgb(0 0 0 / 0.55), 0 0 0 0 rgb(142 190 33 / 0.5);
    animation: film-ring 2.6s ease-out infinite;
    transition: transform 0.25s ease, background-color 0.25s ease;
}
.film-play svg {
    width: 2.25rem;
    height: 2.25rem;
    margin-left: 0.2rem;   /* optical centre - the triangle's mass sits left */
}
.film-cover:hover .film-play,
.film-cover:focus-visible .film-play {
    transform: scale(1.08);
    background: #9fd12a;
}

.film-cover-name {
    color: #fff;
    font-size: clamp(1.05rem, 1.7vw, 1.7rem);
    font-weight: 600;
    line-height: 1.3;
    max-width: 28ch;
}
.film-cover-meta {
    color: #8ebe21;
    font-size: clamp(0.62rem, 0.78vw, 0.78rem);
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

@media (max-width: 640px) {
    .js .film-cover { gap: 0.3rem; padding: 0.9rem; }
    .film-cover-logo { top: 0.8rem; left: 0.9rem; height: 1rem; }
    .film-play { width: 3rem; height: 3rem; margin-bottom: 0.7rem; }
    .film-play svg { width: 1.3rem; height: 1.3rem; }
    .film-cover-name { font-size: 0.9rem; }
    .film-cover-meta { font-size: 0.58rem; letter-spacing: 0.1em; }
}

@keyframes film-ring {
    0%   { box-shadow: 0 10px 30px rgb(0 0 0 / 0.55), 0 0 0 0 rgb(142 190 33 / 0.5); }
    70%  { box-shadow: 0 10px 30px rgb(0 0 0 / 0.55), 0 0 0 1.6rem rgb(142 190 33 / 0); }
    100% { box-shadow: 0 10px 30px rgb(0 0 0 / 0.55), 0 0 0 0 rgb(142 190 33 / 0); }
}

@media (prefers-reduced-motion: reduce) {
    .js .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    /* The wall keeps rotating here - a cross-fade is a pure opacity change, not the kind of
       movement reduced motion is meant to suppress. Only the scale nudge goes away.
       Two things to keep in mind when touching this block:
       - do NOT fall the tiles back to `display: contents`; `:not(.is-active)` below would keep
         the queued frames at opacity 0 while each still claimed a grid cell (a wall of holes),
       - the `:not()` selector has to be repeated so this matches the specificity of the rule
         it is overriding - a bare `.js .logo-frame` (0,2,0) loses to it (0,3,0). */
    .js .logo-frame,
    .js .logo-frame:not(.is-active) {
        transform: none;
        transition: opacity 0.6s ease, filter 0.3s ease;
    }
    .tsc-hotspot-outer {
        animation: none !important;
    }
    .step-circle {
        animation: none !important;
        opacity: 1;
    }
    .step-arrow {
        animation: none !important;
        stroke-dashoffset: 0;
    }
    .nav-topbar, .nav-main {
        transition: none !important;
    }
}

/* Loading spinner for forms */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.6s linear infinite;
}

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