/* ==============================================================
   scrollflow.css
   Converts the old full-page snap-scroll layout into a continuous
   scroll experience: the hero is pinned and its captions/background
   crossfade as you scroll through it, then normal sections follow
   in document flow with a scroll-reveal on each.
   Loaded after style.css — rules here intentionally win.
   ============================================================== */

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    overflow-x: hidden;
    background-color: #2A2320;
}

/* Warm the light sections slightly (was flat #eee) to sit better
   alongside the new terracotta accent and headshot's warm tones. */
.light-bg {
    background-color: #FFFFFF;
}

/* Warm the dark sections too (was a cold grey-green, #4a504f) so
   Startup / Performing Arts read as part of the same warm palette
   instead of clashing with it. */
.dark-bg {
    background-color: #2A2320;
}

.about-photo {
    border-radius: 18px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
}

/* ---- Kill the old absolute/display:none page-per-section engine ---- */
#body-wrapper {
    height: auto !important;
    position: relative;
}

#body-wrapper section {
    position: relative !important;
    display: block !important;
    top: auto !important;
    left: auto !important;
    width: 100%;
    height: auto !important;
    min-height: 100vh;
    overflow: visible !important;
}

#body-wrapper section .inner-wrapper {
    height: auto !important;
    min-height: 100vh;
    overflow: visible !important;
}

#body-wrapper section .contain {
    padding-top: 110px !important;
    padding-bottom: 90px !important;
    box-sizing: border-box;
}

/* ---- Hero / #home: pinned while its scroll track passes ----
   NOTE: these selectors are prefixed with #body-wrapper so they win
   against the general #body-wrapper section / .inner-wrapper / .contain
   rules above — those use the same !important flag, so without the
   extra specificity here the general rules were silently winning and
   collapsing the hero to a single viewport (no scroll track, no pin). */
#body-wrapper #home {
    height: 280vh !important;
    min-height: 280vh;
}

#body-wrapper #home .inner-wrapper {
    position: sticky !important;
    top: 0;
    height: 100vh !important;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3;
}

#body-wrapper #home .contain,
#body-wrapper #home .container {
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    height: auto;
    width: 100%;
}

#home #slider-container,
#home #bg-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

#home #bg-slider div {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.8s ease;
}

#home #bg-slider div img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

#home #bg-slider div.bg-visible {
    opacity: 1;
}

#home-contents {
    margin-top: 0 !important;
    position: relative;
    z-index: 3;
}

#caption-carousel {
    position: relative;
    height: 90px;
    left: 0 !important;
    top: 0 !important;
    overflow: visible;
}

#caption-carousel .caption {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    margin-top: 0 !important;
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    pointer-events: none;
}

#caption-carousel .caption.caption-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll cue at the base of the hero */
.scroll-cue {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 4;
    color: #fff;
    font-family: "PT Sans Narrow", Helvetica, Verdana, Tahoma, sans-serif;
    font-size: 0.85em;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    text-align: center;
    opacity: 0.85;
    transition: opacity 0.4s ease;
}

.scroll-cue span {
    display: block;
    margin-top: 8px;
    width: 1px;
    height: 34px;
    background: rgba(255, 255, 255, 0.6);
    margin-left: auto;
    margin-right: auto;
    animation: scrollCueMove 1.6s ease-in-out infinite;
}

@keyframes scrollCueMove {
    0% { transform: scaleY(0.3); opacity: 0.3; transform-origin: top; }
    50% { transform: scaleY(1); opacity: 1; transform-origin: top; }
    100% { transform: scaleY(0.3); opacity: 0.3; transform-origin: bottom; }
}

#home.scrolled-past .scroll-cue {
    opacity: 0;
    pointer-events: none;
}

/* ---- Scroll-reveal for the rest of the page ----
   Scoped under html.js: if JavaScript never runs (and so never adds
   .in-view), content simply displays normally rather than staying
   invisible forever. */
.js .reveal {
    opacity: 0;
    transform: translateY(36px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.js .reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}

.js .reveal-stagger.in-view .reveal-item {
    opacity: 1;
    transform: translateY(0);
}

.js .reveal-item {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (prefers-reduced-motion: reduce) {
    .reveal,
    .reveal-item,
    #caption-carousel .caption,
    #home #bg-slider div {
        transition: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
}

/* Stagger delays for items within a reveal-stagger group (publications, startup cards, performing-arts list) */
.reveal-stagger .reveal-item:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger .reveal-item:nth-child(2) { transition-delay: 0.12s; }
.reveal-stagger .reveal-item:nth-child(3) { transition-delay: 0.19s; }
.reveal-stagger .reveal-item:nth-child(4) { transition-delay: 0.26s; }
.reveal-stagger .reveal-item:nth-child(5) { transition-delay: 0.33s; }
.reveal-stagger .reveal-item:nth-child(6) { transition-delay: 0.40s; }
.reveal-stagger .reveal-item:nth-child(n+7) { transition-delay: 0.46s; }

/* ---- Preloader entrance: full purple screen collapses into the nav bar ---- */
#preloader {
    transition: height 0.9s cubic-bezier(0.77, 0, 0.175, 1), opacity 0.4s ease 0.5s;
    overflow: hidden;
}

#preloader.preloader-collapse {
    height: 90px;
}

#preloader.preloader-hide {
    opacity: 0;
    pointer-events: none;
}

#text-load {
    transition: opacity 0.45s ease, transform 0.45s ease;
}

#load-overlay {
    transition: width 0.9s cubic-bezier(0.65, 0, 0.35, 1);
}

#preloader.preloader-reveal-text #load-overlay {
    width: 0%;
}

#preloader.preloader-collapse #text-load {
    opacity: 0;
    transform: translateY(-16px) scale(0.85);
}

/* ---- Simplified fixed top navigation ---- */
#nav-container {
    position: fixed !important;
    top: 0 !important;
    left: 0;
    width: 100%;
    height: 90px !important;
    background: #B5726A;
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.35);
    z-index: 500;
}

.js #nav-container {
    opacity: 0;
    transform: translateY(-16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.js #nav-container.nav-visible {
    opacity: 1;
    transform: translateY(0);
}

#nav-container ul {
    margin-top: 0;
    padding: 0;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

#nav-container li {
    padding: 0;
    margin: 0 22px;
}

#nav-container li a {
    height: auto;
    line-height: normal;
    margin-top: 0;
    overflow: visible;
}

#nav-container li a span {
    position: static;
    display: inline-block;
}

#nav-container li a .top,
#nav-container li a .bottom {
    top: 0;
    color: #000;
}

#nav-container li a .bottom {
    display: none;
}

#nav-container li.active a .top,
#nav-container li.active a {
    color: #fff;
}

#nav-container li.active a {
    border-bottom: 1px solid #fff;
}

@media (max-width: 600px) {
    #nav-container li {
        margin: 0 12px;
    }
    #nav-container li a {
        font-size: 0.85em;
    }
}

/* ---- Contact form: restore visible field borders ----
   The inline styles on these inputs set border:0px, which was fine when
   the section had a colored background (the white fill alone read as a
   box), but now that .light-bg is plain white, a white input on a white
   section is invisible. !important is needed to beat the inline style. */
.contact-form input.requiredField,
.contact-form textarea.requiredField {
    border: 1px solid #ccc !important;
}

.contact-form input.requiredField:focus,
.contact-form textarea.requiredField:focus {
    border-color: #B5726A !important;
}

/* ==============================================================
   Mobile-only adjustments (<=768px)
   ============================================================== */

/* Hamburger toggle: hidden on desktop */
#nav-toggle {
    display: none;
}

@media screen and (max-width: 768px) {
    /* ---- 1. Hamburger menu instead of a wrapping nav row ---- */
    #nav-container {
        height: 64px !important;
    }

    #body-wrapper section .contain {
        padding-top: 84px !important;
    }

    #nav-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 5px;
        position: absolute;
        top: 0;
        right: 18px;
        height: 100%;
        width: 32px;
        background: none;
        border: none;
        padding: 0;
        cursor: pointer;
        z-index: 2;
    }

    #nav-toggle span {
        display: block;
        width: 26px;
        height: 2px;
        background: #000;
        border-radius: 1px;
    }

    #nav-container #nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        flex-direction: column;
        background: #FFFFFF;
        box-shadow: 0 6px 10px rgba(0, 0, 0, 0.25);
    }

    #nav-container.nav-open #nav {
        display: flex;
    }

    #nav-container li {
        width: 100%;
        margin: 0;
        padding: 16px 0;
        text-align: center;
        border-top: 1px solid rgba(0, 0, 0, 0.1);
    }

    /* The desktop active-state (white text/underline) was designed for
       the terracotta bar and is invisible on this white panel — use the
       accent color instead. */
    #nav-container li.active a,
    #nav-container li.active a .top {
        color: #B5726A;
    }

    #nav-container li.active a {
        border-bottom-color: #B5726A;
    }

    /* ---- 2. Breathing room under the About Me photo once it stacks ---- */
    #aboutMe img {
        margin-bottom: 28px;
    }

    /* ---- 3/4/5. Left-align Research / Startup / Performing Arts content
       (overrides the template's own `.exp-list{text-align:center}` rule
       set at this same breakpoint in style.css) ---- */
    .exp-list {
        text-align: left !important;
    }
}