/* ============================================================
   RSV LAB — STYLESHEET
   ============================================================
   
   To rebrand the entire site, change ONLY the :root variables
   below (colours, fonts, spacing, radii, shadows). Everything
   else cascades automatically.
   
   The card system reads --card-accent from inline styles set
   by render.js, so per-card colours are controlled from
   content.js.
   ============================================================ */

/* ---------- THEME VARIABLES ---------- */
:root {
    /* ============================================================
       BRAND COLOURS — change these 3 to rebrand the whole site
       ============================================================ */
    --primary-orange: #FF8C00;      /* warm accent */
    --primary-purple: #7614DC;      /* main brand colour */
    --primary-blue:   #1E90FF;      /* secondary accent */

    /* ============================================================
       EXTRA COLOURS — used as card accents
       ============================================================ */
    --primary-cyan:   #06B6D4;
    --primary-green:  #2D6A4F;
    --primary-red:    #DC2626;
    --primary-yellow: #FFC300;
    --primary-gold:   #F59E0B;

    /* ============================================================
       NEUTRALS — backgrounds, text, borders
       ============================================================ */
    --dark-navy:      #06283d;      /* footer, dark elements */
    --light-bg:       #f8fafc;      /* section backgrounds */
    --white:          #ffffff;
    --border-color:   #e2e8f0;
    --text-main:      #1f2937;      /* body text */
    --text-muted:     #64748b;      /* secondary text */

    /* ============================================================
       FONTS — change these to use different typefaces
       ============================================================ */
    --font-sans:  'Inter', system-ui, -apple-system, sans-serif;
    --font-serif: 'Source Serif 4', Georgia, serif;

    /* ============================================================
       SPACING SCALE — used for card padding, grid gap, sections
       ============================================================ */
    --card-padding: 32px;
    --grid-gap:     28px;
    --section-pad:  90px;

    /* ============================================================
       BORDER RADII
       ============================================================ */
    --radius-sm:   6px;
    --radius-md:   12px;
    --radius-lg:   16px;
    --radius-full: 9999px;

    /* ============================================================
       SHADOWS
       ============================================================ */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.02);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.03);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.06);
    --shadow-xl: 0 20px 40px -12px rgba(0,0,0,0.10);
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
    font-family: var(--font-sans);
    background-color: var(--light-bg);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
a { text-decoration: none; color: var(--primary-blue); transition: color 0.2s; }
a:hover { color: #084a8f; }
a:focus-visible, button:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 3px;
    border-radius: 4px;
}
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
.hidden { display: none !important; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; animation: none !important; }
}

/* ---------- LAYOUT ---------- */
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--section-pad) 0; }

.section-title {
    font-family: var(--font-serif);
    font-size: 2.15rem;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 18px;
    text-align: center;
    letter-spacing: -0.5px;
    color: var(--dark-navy);
}
.section-title span { color: var(--primary-purple); }

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.6;
    max-width: 720px;
    margin: 0 auto 52px auto;
}

/* ---------- HEADER ---------- */
.header {
    background: rgba(255,255,255,0.95);
    backdrop-filter: saturate(180%) blur(10px);
    -webkit-backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
    gap: 20px;
    flex-wrap: nowrap;
}
.nav-logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--dark-navy);
    letter-spacing: -1px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    white-space: nowrap;
}
.nav-logo img { height: 38px; width: auto; border-radius: 6px; }
.nav-logo span { color: var(--primary-orange); }
.nav-logo .purple { color: var(--primary-purple); }

.nav-links {
    display: flex;
    gap: 26px;
    font-weight: 600;
    font-size: 0.9rem;
    align-items: center;
    flex-wrap: nowrap;
    white-space: nowrap;
}
.nav-links a {
    color: var(--dark-navy);
    padding: 6px 0;
    position: relative;
    transition: color 0.2s;
}
.nav-links a::after {
    content: '';
    position: absolute;
    left: 0; bottom: 0;
    width: 0; height: 2px;
    background: var(--primary-purple);
    transition: width 0.25s;
}
.nav-links a:hover { color: var(--primary-purple); }
.nav-links a:hover::after { width: 100%; }

.nav-links a.partner-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    background: var(--primary-purple);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    white-space: nowrap;
    line-height: 1;
    transition: background 0.2s, transform 0.2s;
}
.nav-links a.partner-pill:hover {
    background: var(--dark-navy);
    color: var(--white);
    transform: translateY(-1px);
}
.nav-links a.partner-pill::after { display: none; }

.nav-icons { display: flex; gap: 16px; align-items: center; flex-shrink: 0; }
.nav-icons a { font-size: 1.15rem; color: var(--text-muted); transition: color 0.2s, transform 0.2s; }
.nav-icons a:hover { color: var(--primary-purple); transform: translateY(-1px); }

.nav-toggle {
    display: none;
    background: none; border: none;
    font-size: 1.4rem;
    color: var(--dark-navy);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
}
.nav-toggle:hover { background: var(--light-bg); }

/* Progressive hiding to keep the navbar tidy at all widths */
@media (max-width: 1120px) { .nav-links a.partner-pill { display: none; } }
@media (max-width: 940px)  { .nav-icons { display: none; } }
@media (max-width: 900px)  { .nav-links { gap: 18px; font-size: 0.85rem; } }
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-toggle { display: block; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px; left: 0; right: 0;
        background: var(--white);
        border-bottom: 1px solid var(--border-color);
        padding: 22px; gap: 18px;
        box-shadow: var(--shadow-md);
        align-items: flex-start;
    }
    .nav-links.open a.partner-pill { display: inline-flex; }
    .nav-links.open a::after { display: none; }
}

/* ---------- HERO ---------- */
.hero {
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    padding: 90px 0 100px 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -150px; left: 50%; transform: translateX(-50%);
    width: 900px; height: 500px;
    background: radial-gradient(ellipse at center, rgba(118,20,220,0.08) 0%, transparent 70%);
    pointer-events: none;
}
.hero-title {
    font-family: var(--font-serif);
    font-size: 2.85rem;
    font-weight: 700;
    line-height: 1.18;
    letter-spacing: -1px;
    margin-bottom: 22px;
    color: var(--dark-navy);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
}
.hero-title span { color: var(--primary-orange); }
.hero-title .purple { color: var(--primary-purple); }

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 760px;
    margin: 0 auto 28px auto;
    line-height: 1.7;
    position: relative;
}

.founder-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #FFF7ED;
    color: #c2410c;
    padding: 10px 22px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid #fed7aa;
    margin-bottom: 32px;
}
.founder-badge img { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; }

.hero-ctas { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-bottom: 42px; position: relative; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s;
    border: 2px solid transparent;
}
.btn-primary { background: var(--primary-purple); color: var(--white); }
.btn-primary:hover {
    background: var(--dark-navy);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -8px rgba(118,20,220,0.4);
}
.btn-secondary { background: var(--white); color: var(--dark-navy); border-color: var(--border-color); }
.btn-secondary:hover {
    border-color: var(--dark-navy);
    color: var(--dark-navy);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.hero-highlights { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; position: relative; }
.hero-highlight {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--text-main);
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}
.hero-highlight i { color: var(--primary-purple); }

/* ---------- CARDS ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--grid-gap);
    align-items: stretch;
}
.card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
    display: flex;
    flex-direction: column;
    height: 100%;
    border-top: 5px solid var(--card-accent, var(--primary-blue));
    position: relative;
    overflow: hidden;
}
.card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--card-accent, var(--primary-blue)) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s;
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: #cbd5e1;
}
.card:hover::after { opacity: 0.3; }

.card-icon {
    font-size: 2rem;
    color: var(--card-accent, var(--primary-blue));
    margin-bottom: 18px;
    transition: transform 0.3s;
    display: inline-block;
}
.card:hover .card-icon { transform: scale(1.08); }

.card-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 12px;
    color: var(--dark-navy);
}
.card-text { color: var(--text-muted); font-size: 0.95rem; line-height: 1.65; flex-grow: 1; margin-bottom: 18px; }
.card-link {
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--card-accent, var(--primary-blue));
    margin-top: auto;
    transition: gap 0.2s;
}
.card-link:hover { gap: 10px; }
.card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
}

/* ---------- PUBLICATIONS ---------- */
.publication-list { display: grid; grid-template-columns: 1fr; gap: 22px; }
.publication-item {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px 32px;
    transition: box-shadow 0.3s, transform 0.3s, border-color 0.3s;
    border-left: 5px solid var(--primary-purple);
}
.publication-item:hover {
    box-shadow: var(--shadow-xl);
    transform: translateX(6px);
    border-color: #cbd5e1;
}
.pub-title { font-family: var(--font-serif); font-size: 1.15rem; font-weight: 600; line-height: 1.4; color: var(--dark-navy); }
.pub-authors { font-size: 0.95rem; color: var(--text-muted); }
.pub-journal { font-style: italic; font-size: 0.9rem; color: var(--text-muted); }
.pub-links { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 6px; }
.pub-link {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 14px;
    background: #f1f5f9;
    border-radius: var(--radius-sm);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.pub-link:hover {
    background: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
    transform: translateY(-1px);
}

/* ---------- PROJECT TABS ---------- */
.project-tabs { display: flex; justify-content: center; gap: 10px; margin-bottom: 42px; flex-wrap: wrap; }
.project-tabs button {
    padding: 10px 22px;
    border: 1px solid var(--border-color);
    background: var(--white);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-main);
    font-family: inherit;
}
.project-tabs button.active,
.project-tabs button:hover {
    background: var(--primary-purple);
    color: var(--white);
    border-color: var(--primary-purple);
    transform: translateY(-1px);
    box-shadow: 0 6px 15px -6px rgba(118,20,220,0.4);
}

/* ---------- FOUNDER / TEAM ---------- */
.founder-container {
    display: flex;
    align-items: center;
    gap: 50px;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 50px;
    border: 1px solid var(--border-color);
    max-width: 950px;
    margin: 0 auto;
    box-shadow: var(--shadow-md);
}
.founder-avatar {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid #f0f4f8;
    flex-shrink: 0;
    background: #e2e8f0;
    box-shadow: 0 8px 20px -8px rgba(0,0,0,0.15);
}
.founder-info h3 { font-family: var(--font-serif); font-size: 1.85rem; line-height: 1.2; margin-bottom: 6px; color: var(--dark-navy); }
.founder-info .role { color: var(--primary-orange); font-weight: 700; margin-bottom: 14px; font-size: 1.05rem; }
.founder-info p { color: var(--text-muted); line-height: 1.7; margin-bottom: 20px; }
.founder-social { display: flex; gap: 18px; }
.founder-social a { font-size: 1.5rem; color: var(--text-muted); transition: color 0.2s, transform 0.2s; }
.founder-social a:hover { color: var(--primary-purple); transform: translateY(-2px); }

.member-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; margin-top: 40px; }
.member {
    text-align: center;
    padding: 20px;
    border-radius: var(--radius-md);
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    color: inherit;
    display: block;
}
.member:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.member img { width: 90px; height: 90px; border-radius: 50%; object-fit: cover; margin: 0 auto 12px; border: 3px solid var(--light-bg); }
.member-name { font-weight: 600; font-size: 0.95rem; }
.member-role { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

/* ---------- CONTACT ---------- */
.contact-section { background: var(--white); border-top: 1px solid var(--border-color); }
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 26px; }
.contact-card {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 34px 26px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: #cbd5e1;
}
.contact-icon { font-size: 2.4rem; margin-bottom: 18px; color: var(--card-accent, var(--primary-blue)); }
.contact-title { font-family: var(--font-serif); font-size: 1.2rem; font-weight: 600; margin-bottom: 12px; color: var(--dark-navy); }
.contact-text { color: var(--text-muted); font-size: 0.95rem; line-height: 1.75; word-break: break-word; }
.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--white) !important;
    margin-top: 14px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.10);
    transition: transform 0.2s, box-shadow 0.2s;
}
.social-btn:hover { transform: scale(1.05); box-shadow: 0 8px 20px rgba(0,0,0,0.15); }

/* ---------- FOOTER ---------- */
.footer {
    background: var(--dark-navy);
    color: #94a3b8;
    padding: 55px 0 45px;
    text-align: center;
    font-size: 0.9rem;
}
.footer-tagline { color: #cbd5e1; margin-bottom: 18px; font-style: italic; }
.footer a { color: #cbd5e1; transition: color 0.2s; }
.footer a:hover { color: var(--white); }
.footer-links { display: flex; justify-content: center; gap: 22px; margin-top: 20px; flex-wrap: wrap; }

/* ---------- BACK-TO-TOP ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px; right: 30px;
    width: 46px; height: 46px;
    border-radius: 50%;
    background: var(--primary-purple);
    color: var(--white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    box-shadow: 0 8px 20px -6px rgba(118,20,220,0.5);
    z-index: 900;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: translateY(-3px); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 768px) {
    :root {
        --card-padding: 24px;
        --grid-gap: 20px;
        --section-pad: 60px;
    }
    .container { padding: 0 18px; }
    .hero { padding: 60px 0 70px 0; }
    .hero-title { font-size: 1.95rem; line-height: 1.25; }
    .hero-subtitle { font-size: 1rem; }
    .founder-badge { white-space: normal; text-align: left; }
    .btn { padding: 11px 22px; font-size: 0.9rem; }
    .section-title { font-size: 1.65rem; }
    .section-subtitle { font-size: 0.95rem; margin-bottom: 40px; }
    .card-grid { grid-template-columns: 1fr; }
    .founder-container { flex-direction: column; text-align: center; padding: 30px 24px; gap: 26px; }
    .founder-social { justify-content: center; }
    .founder-avatar { width: 150px; height: 150px; }
    .founder-info h3 { font-size: 1.5rem; }
    .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; }
}

/* ---------- PRINT ---------- */
@media print {
    .header, .footer, .nav-links, .nav-icons, .social-btn, .back-to-top { display: none !important; }
    body { background: #fff; }
    .card { break-inside: avoid; }
}
/* ============================================================
   NOTICE BOARD — top-of-hero pills
   ============================================================
   
   Two variants:
     .notice-update    → green (latest news)
     .notice-deadline  → amber (upcoming deadline)
   
   Structure of one pill:
     <div class="top-notice notice-update">
       <span class="notice-dot"></span>
       <span class="notice-label">Latest</span>
       <span class="notice-text">Message — Sept 2026</span>
     </div>
   ============================================================ */

/* --- Wrapper: stacks pills vertically, centres them --- */
.top-notices {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}

/* --- Base pill --- */
.top-notice {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    border-radius: var(--radius-full, 9999px);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.4;
    text-decoration: none;
    color: inherit;
    border: 1px solid transparent;
    transition: transform 0.2s, box-shadow 0.2s;
    max-width: 100%;
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
}

/* Clickable pills lift slightly on hover */
a.top-notice:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px -8px rgba(0,0,0,0.15);
}

/* --- Green variant (update) --- */
.notice-update {
    background: #ecfdf5;
    color: #065f46;
    border-color: #a7f3d0;
}
.notice-update .notice-dot { background: #10b981; }

/* --- Amber variant (deadline) --- */
.notice-deadline {
    background: #fffbeb;
    color: #92400e;
    border-color: #fde68a;
}
.notice-deadline .notice-dot { background: #f59e0b; }

/* --- Pulsing dot --- */
.notice-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    animation: notice-pulse 2s ease-in-out infinite;
}

@keyframes notice-pulse {
    0%, 100% { opacity: 1;   transform: scale(1); }
    50%      { opacity: 0.6; transform: scale(0.85); }
}

/* --- Label ("Latest" / "Deadline") --- */
.notice-label {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.8px;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(255,255,255,0.6);
}

/* --- Message body --- */
.notice-text { font-weight: 500; }

/* --- Date suffix --- */
.notice-date {
    opacity: 0.75;
    font-style: italic;
    margin-left: 2px;
}

/* --- Mobile --- */
@media (max-width: 640px) {
    .top-notice {
        font-size: 0.8rem;
        padding: 8px 14px;
        gap: 8px;
    }
    .notice-label {
        font-size: 0.65rem;
        padding: 2px 6px;
    }
    .top-notices { margin-bottom: 26px; }
}

/* --- Accessibility: respect reduced-motion --- */
@media (prefers-reduced-motion: reduce) {
    .notice-dot { animation: none; }
}