/*
 * Solon Brand Hub — shared styles (v1.0.0)
 *
 * Per-brand HTML files override only:
 *   --brand-glow        primary brand colour for washes / glow accents
 *   --brand-glow-rgb    same colour in "r,g,b" form (for rgba)
 *   --wash-primary, --wash-secondary, --wash-edge      (optional, dark mode)
 *   --wash-light-primary, --wash-light-secondary, --wash-light-edge (optional, light mode)
 *
 * Defaults below tuned for cool blues/greens/teals/cyans. Hot reds (Virtus)
 * override the wash opacities slightly downward.
 */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #020617;
    --bg-elevated: #0B1220;
    --bg-card: #0F172A;
    --border: #1E293B;
    --border-strong: #334155;
    --text: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-muted: #8893A7;
    --text-dim: #6B7A90;

    --panel-divider: rgba(148,163,184,0.08);
    --glass: rgba(15,23,42,0.5);
    --glass-border: rgba(148,163,184,0.12);

    --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-quint: cubic-bezier(0.65, 0, 0.35, 1);

    /* Wash opacities — brands may override */
    --wash-primary: 0.42;
    --wash-secondary: 0.35;
    --wash-edge: 0.06;
    --wash-light-primary: 0.32;
    --wash-light-secondary: 0.26;
    --wash-light-edge: 0.08;
}

[data-theme="light"] {
    --bg: #F4F6FA;
    --bg-elevated: #FFFFFF;
    --bg-card: #FFFFFF;
    --border: #D5DCE5;
    --border-strong: #B8C2CD;
    --text: #0B1220;
    --text-secondary: #334155;
    --text-muted: #64748B;
    --text-dim: #94A3B8;

    --panel-divider: rgba(15,23,42,0.08);
    --glass: rgba(255,255,255,0.7);
    --glass-border: rgba(15,23,42,0.08);
}

html, body { height: 100%; }
body {
    font-family: 'Space Grotesk', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    overflow: hidden;
    position: relative;
}

body::after {
    content: '';
    position: fixed; inset: -20%;
    background:
        radial-gradient(ellipse 60% 40% at 20% 0%, rgba(var(--brand-glow-rgb), 0.10), transparent 60%),
        radial-gradient(ellipse 50% 50% at 80% 100%, rgba(var(--brand-glow-rgb), 0.06), transparent 60%);
    pointer-events: none;
    z-index: 0;
    filter: blur(40px);
}
[data-theme="light"] body::after {
    background:
        radial-gradient(ellipse 60% 40% at 20% 0%, rgba(var(--brand-glow-rgb), 0.16), transparent 60%),
        radial-gradient(ellipse 50% 50% at 80% 100%, rgba(var(--brand-glow-rgb), 0.08), transparent 60%);
}

/* === Topbar === */
.topbar {
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 50;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 1.1rem 1.5rem;
    pointer-events: none;
    opacity: 0;
    animation: topbarIn 0.9s var(--ease-spring) 0.2s forwards;
}
.topbar > * { pointer-events: auto; }
.topbar > .back-link { justify-self: start; }
.topbar > .brand-stamp { justify-self: center; }

.back-link {
    display: inline-flex; align-items: center; gap: 0.55rem;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.6rem 1rem 0.6rem 0.85rem;
    border-radius: 999px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(14px) saturate(180%);
    -webkit-backdrop-filter: blur(14px) saturate(180%);
    transition: all 0.3s var(--ease-spring);
}
.back-link:hover,
.back-link:focus-visible {
    color: var(--text);
    border-color: rgba(var(--brand-glow-rgb), 0.4);
    box-shadow: 0 0 0 4px rgba(var(--brand-glow-rgb), 0.06);
    outline: none;
}
.back-link svg { transition: transform 0.3s var(--ease-spring); }
.back-link:hover svg,
.back-link:focus-visible svg { transform: translateX(-3px); }

.brand-stamp {
    display: flex; align-items: center; gap: 0.65rem;
    padding: 0.4rem 0.9rem 0.4rem 0.45rem;
    border-radius: 999px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(14px) saturate(180%);
    -webkit-backdrop-filter: blur(14px) saturate(180%);
}
.brand-stamp img {
    width: 28px; height: 28px;
    object-fit: contain;
    border-radius: 6px;
    background: #FFFFFF;
    padding: 3px;
    box-shadow: 0 0 0 1px rgba(255,255,255,0.08);
}
.brand-stamp-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.62rem;
    letter-spacing: 0.22em;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* === Stage / triptych === */
.stage {
    display: flex;
    width: 100%;
    height: 100vh;
    position: relative;
    z-index: 1;
}

.panel {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: clamp(4.5rem, 9vh, 6.5rem) clamp(1.5rem, 3vw, 3rem) clamp(3rem, 7vh, 4.5rem);
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    border-right: 1px solid var(--panel-divider);
    transition: flex 0.85s var(--ease-spring);
    cursor: pointer;
    isolation: isolate;
    will-change: flex;
}
.panel:last-child { border-right: none; }
.panel:focus-visible {
    outline: none;
    box-shadow: inset 0 0 0 2px rgba(var(--brand-glow-rgb), 0.6);
}

.panel-wash {
    position: absolute; inset: 0;
    pointer-events: none;
    z-index: -2;
    transition: opacity 0.6s var(--ease-spring), transform 0.85s var(--ease-spring);
    opacity: 0.85;
}
.panel[data-index="01"] .panel-wash {
    background:
        radial-gradient(ellipse 90% 70% at 30% 10%, rgba(var(--brand-glow-rgb), var(--wash-primary)) 0%, transparent 60%),
        linear-gradient(180deg, rgba(var(--brand-glow-rgb), var(--wash-edge)) 0%, transparent 50%);
}
.panel[data-index="02"] .panel-wash {
    background:
        radial-gradient(ellipse 80% 80% at 50% 50%, rgba(var(--brand-glow-rgb), var(--wash-secondary)) 0%, transparent 65%),
        linear-gradient(180deg, transparent 0%, rgba(var(--brand-glow-rgb), var(--wash-edge)) 100%);
}
.panel[data-index="03"] .panel-wash {
    background:
        radial-gradient(ellipse 90% 70% at 70% 90%, rgba(var(--brand-glow-rgb), var(--wash-primary)) 0%, transparent 60%),
        linear-gradient(0deg, rgba(var(--brand-glow-rgb), var(--wash-edge)) 0%, transparent 50%);
}
[data-theme="light"] .panel[data-index="01"] .panel-wash {
    background:
        radial-gradient(ellipse 90% 70% at 30% 10%, rgba(var(--brand-glow-rgb), var(--wash-light-primary)) 0%, transparent 60%),
        linear-gradient(180deg, rgba(var(--brand-glow-rgb), var(--wash-light-edge)) 0%, transparent 50%);
}
[data-theme="light"] .panel[data-index="02"] .panel-wash {
    background:
        radial-gradient(ellipse 80% 80% at 50% 50%, rgba(var(--brand-glow-rgb), var(--wash-light-secondary)) 0%, transparent 65%),
        linear-gradient(180deg, transparent 0%, rgba(var(--brand-glow-rgb), var(--wash-light-edge)) 100%);
}
[data-theme="light"] .panel[data-index="03"] .panel-wash {
    background:
        radial-gradient(ellipse 90% 70% at 70% 90%, rgba(var(--brand-glow-rgb), var(--wash-light-primary)) 0%, transparent 60%),
        linear-gradient(0deg, rgba(var(--brand-glow-rgb), var(--wash-light-edge)) 0%, transparent 50%);
}

/* Elastic expansion — works for hover AND keyboard focus */
.stage:has(.panel:hover) .panel,
.stage:has(.panel:focus-visible) .panel { flex: 0.82; }
.stage:has(.panel:hover) .panel:hover,
.stage:has(.panel:focus-visible) .panel:focus-visible { flex: 1.55; }
.panel:hover .panel-wash,
.panel:focus-visible .panel-wash {
    opacity: 1.1;
    transform: scale(1.05);
}

.panel-accent-line {
    position: absolute;
    top: 0; left: 0;
    height: 2px;
    width: 100%;
    background: linear-gradient(90deg, transparent, var(--brand-glow), transparent);
    opacity: 0;
    transform: scaleX(0.3);
    transform-origin: center;
    transition: opacity 0.5s var(--ease-spring), transform 0.7s var(--ease-spring);
    z-index: 3;
}
.panel:hover .panel-accent-line,
.panel:focus-visible .panel-accent-line {
    opacity: 1;
    transform: scaleX(1);
}

.panel-header {
    display: flex; align-items: center; justify-content: space-between;
    position: relative; z-index: 2;
}
.panel-eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    letter-spacing: 0.3em;
    color: var(--text-muted);
    text-transform: uppercase;
    display: inline-flex; align-items: center; gap: 0.7rem;
}
.panel-eyebrow .dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--brand-glow);
    box-shadow: 0 0 12px rgba(var(--brand-glow-rgb), 0.6);
    display: inline-block;
    transition: all 0.4s var(--ease-spring);
}
.panel:hover .panel-eyebrow .dot,
.panel:focus-visible .panel-eyebrow .dot {
    box-shadow: 0 0 18px rgba(var(--brand-glow-rgb), 0.9);
    transform: scale(1.3);
}
.panel-icon {
    width: 36px; height: 36px;
    color: var(--text-secondary);
    opacity: 0.55;
    transition: all 0.4s var(--ease-spring);
}
.panel:hover .panel-icon,
.panel:focus-visible .panel-icon {
    color: var(--brand-glow);
    opacity: 1;
    transform: rotate(-3deg) scale(1.08);
}

.panel-content {
    position: relative; z-index: 2;
    display: flex; flex-direction: column;
    gap: 1.5rem;
    max-width: 420px;
}
.panel-title {
    font-size: clamp(2rem, 3.4vw, 4rem);
    font-weight: 700;
    line-height: 0.98;
    letter-spacing: -0.045em;
    color: var(--text);
    transition: transform 0.6s var(--ease-spring);
}
.panel:hover .panel-title,
.panel:focus-visible .panel-title { transform: translateY(-4px); }
.panel-desc {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 400px;
    font-weight: 400;
}

.panel-cta {
    display: inline-flex; align-items: center; gap: 0.7rem;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    color: var(--text);
    text-transform: uppercase;
    padding: 0.9rem 0;
    margin-top: 0.5rem;
    width: fit-content;
    position: relative;
}
.panel-cta::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%; height: 1px;
    background: var(--text);
    opacity: 0.25;
    transform-origin: left;
    transition: opacity 0.4s var(--ease-spring),
                background 0.4s var(--ease-spring),
                transform 0.5s var(--ease-spring);
}
.panel:hover .panel-cta,
.panel:focus-visible .panel-cta { color: var(--brand-glow); }
.panel:hover .panel-cta::after,
.panel:focus-visible .panel-cta::after {
    opacity: 1;
    background: var(--brand-glow);
}
.panel-cta svg { transition: transform 0.45s var(--ease-spring); }
.panel:hover .panel-cta svg,
.panel:focus-visible .panel-cta svg { transform: translateX(10px); }

.panel-vertical {
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%) rotate(180deg);
    writing-mode: vertical-rl;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    letter-spacing: 0.42em;
    color: var(--text-dim);
    text-transform: uppercase;
    opacity: 0.5;
    z-index: 2;
    transition: opacity 0.4s, color 0.4s;
}
.panel:hover .panel-vertical,
.panel:focus-visible .panel-vertical {
    opacity: 0.9;
    color: var(--text-secondary);
}

/* === Footer === */
.site-footer {
    position: fixed; bottom: 0; left: 0; right: 0;
    z-index: 10;
    padding: 1.25rem 1.75rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.62rem;
    letter-spacing: 0.22em;
    color: var(--text-dim);
    text-transform: uppercase;
    display: flex; justify-content: space-between; align-items: center;
    pointer-events: none;
    opacity: 0;
    animation: topbarIn 0.9s var(--ease-spring) 0.6s forwards;
}
.site-footer .footer-meta {
    display: inline-flex; align-items: center; gap: 0.6rem;
}
.site-footer .pulse {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--brand-glow);
    box-shadow: 0 0 10px rgba(var(--brand-glow-rgb), 0.6);
    animation: pulse 2.4s ease-in-out infinite;
}

/* === Animations === */
@keyframes pulse {
    0%, 100% { opacity: 0.45; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}
@keyframes topbarIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes panelIn {
    from { opacity: 0; transform: translateY(60px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes contentIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.panel {
    opacity: 0;
    animation: panelIn 1s var(--ease-spring) forwards;
}
.panel[data-index="01"] { animation-delay: 0.25s; }
.panel[data-index="02"] { animation-delay: 0.4s; }
.panel[data-index="03"] { animation-delay: 0.55s; }

.panel-content > *,
.panel-header,
.panel-vertical {
    opacity: 0;
    animation: contentIn 0.9s var(--ease-spring) forwards;
}
.panel[data-index="01"] .panel-header { animation-delay: 0.55s; }
.panel[data-index="01"] .panel-title { animation-delay: 0.65s; }
.panel[data-index="01"] .panel-desc { animation-delay: 0.75s; }
.panel[data-index="01"] .panel-cta { animation-delay: 0.85s; }
.panel[data-index="01"] .panel-vertical { animation-delay: 0.95s; }

.panel[data-index="02"] .panel-header { animation-delay: 0.7s; }
.panel[data-index="02"] .panel-title { animation-delay: 0.8s; }
.panel[data-index="02"] .panel-desc { animation-delay: 0.9s; }
.panel[data-index="02"] .panel-cta { animation-delay: 1s; }
.panel[data-index="02"] .panel-vertical { animation-delay: 1.1s; }

.panel[data-index="03"] .panel-header { animation-delay: 0.85s; }
.panel[data-index="03"] .panel-title { animation-delay: 0.95s; }
.panel[data-index="03"] .panel-desc { animation-delay: 1.05s; }
.panel[data-index="03"] .panel-cta { animation-delay: 1.15s; }
.panel[data-index="03"] .panel-vertical { animation-delay: 1.25s; }

/* === Responsive === */
@media (max-width: 720px) {
    body { overflow: auto; }
    html, body { height: auto; }
    .stage { flex-direction: column; height: auto; min-height: 100vh; }
    .panel {
        min-height: 70vh;
        border-right: none;
        border-bottom: 1px solid var(--panel-divider);
        padding: 5rem 1.75rem 3.5rem;
    }
    .panel:last-child { border-bottom: none; }
    .stage:has(.panel:hover) .panel,
    .stage:has(.panel:focus-visible) .panel,
    .stage:has(.panel:hover) .panel:hover,
    .stage:has(.panel:focus-visible) .panel:focus-visible { flex: 1; }
    .panel-vertical { display: none; }
    .site-footer { position: static; }
    .brand-stamp-text { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .panel { opacity: 1; }
    .panel-header, .panel-content > *, .panel-vertical { opacity: 1; }
    .topbar, .site-footer { opacity: 1; }
    .stage:has(.panel:hover) .panel,
    .stage:has(.panel:focus-visible) .panel,
    .stage:has(.panel:hover) .panel:hover,
    .stage:has(.panel:focus-visible) .panel:focus-visible { flex: 1; }
}