/* UMBRASEC shared styles — Tokyo Night palette
   Layout utilities come from Tailwind (CDN); this file holds the
   custom typography, grid texture, and component styles reused across pages. */

:root {
    --bg:        #1a1b26;
    --bg-soft:   #16161e;
    --border:    #2a2c38;
    --border-hi: #3a3d4a;
    --text:      #c0caf5;
    --muted:     #a9b1d6;
    --blue:      #7aa2f7;
    --purple:    #bb9af7;
    --cyan:      #7dcfff;
    --green:     #9ece6a;
    --orange:    #e0af68;
}

body {
    font-family: 'Inter Tight', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.font-mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }

.tokyo-grid {
    background-image:
        linear-gradient(rgba(122,162,247,0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(122,162,247,0.035) 1px, transparent 1px);
    background-size: 48px 48px;
}

.hero-headline {
    font-size: 92px;
    line-height: 0.92;
    letter-spacing: -0.045em;
    font-weight: 600;
}

@media (max-width: 768px) {
    .hero-headline { font-size: 56px; }
}

.section-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
}

.research-row {
    border-bottom: 1px solid var(--border);
    transition: all 0.2s ease;
}
.research-row:hover {
    background: var(--bg-soft);
    border-bottom-color: var(--border-hi);
}

.nav-link { color: var(--muted); transition: color 0.15s ease; }
.nav-link:hover { color: var(--text); }

/* Alternating headline animation (hero) */
.ghost-line-1, .ghost-line-2 {
    display: inline-block;
    animation: ghostAlternate 9s ease-in-out infinite;
    opacity: 0;
}
.ghost-line-2 { animation-delay: 4.5s; }

@keyframes ghostAlternate {
    0%, 100% { opacity: 0; transform: scale(0.94) translateY(6px); filter: blur(3px); }
    12%      { opacity: 1; transform: scale(1)    translateY(0);   filter: blur(0); }
    38%      { opacity: 1; transform: scale(1)    translateY(0);   filter: blur(0); }
    50%      { opacity: 0; transform: scale(0.94) translateY(6px); filter: blur(3px); }
}

@media (prefers-reduced-motion: reduce) {
    .ghost-line-1, .ghost-line-2 { animation: none; opacity: 1; }
}

/* ── Article / long-form typography ───────────────────────────── */
.prose { max-width: 760px; }
.prose h2 {
    font-size: 1.9rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 3rem 0 1rem;
    color: var(--text);
}
.prose h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 2.2rem 0 0.75rem;
    color: var(--text);
}
.prose p { color: var(--muted); line-height: 1.7; margin: 1rem 0; }
.prose ul, .prose ol { color: var(--muted); line-height: 1.7; margin: 1rem 0 1rem 1.25rem; }
.prose li { margin: 0.4rem 0; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose a { color: var(--blue); text-decoration: underline; text-underline-offset: 2px; }
.prose a:hover { color: var(--cyan); }
.prose strong { color: var(--text); font-weight: 600; }

.prose code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 0.1em 0.4em;
    color: var(--cyan);
}

.prose pre {
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.25rem 1.4rem;
    overflow-x: auto;
    margin: 1.5rem 0;
    font-size: 0.83rem;
    line-height: 1.6;
}
.prose pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--text);
    font-size: inherit;
}

.callout {
    border: 1px solid var(--border);
    border-left: 3px solid var(--blue);
    background: var(--bg-soft);
    border-radius: 12px;
    padding: 1.1rem 1.3rem;
    margin: 1.75rem 0;
}
.callout p { margin: 0.3rem 0; }

blockquote {
    border-left: 3px solid var(--border-hi);
    padding-left: 1.1rem;
    margin: 1.5rem 0;
    color: var(--muted);
    font-style: italic;
}

.table-wrap { overflow-x: auto; margin: 1.5rem 0; }
table.data {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}
table.data th, table.data td {
    text-align: left;
    padding: 0.6rem 0.85rem;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}
table.data th {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}
table.data td { color: var(--muted); }

/* ── Anchor offset for sticky nav ─────────────────────────────── */
html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 88px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* ── Scroll-reveal ────────────────────────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1),
                transform 0.7s cubic-bezier(0.16,1,0.3,1);
    will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
}

/* active nav link (scrollspy) */
.nav-link.active { color: var(--text); }
.nav-link.active::after {
    content: "";
    display: block;
    height: 1px;
    background: var(--blue);
    margin-top: 2px;
    animation: navUnderline 0.3s ease forwards;
}
@keyframes navUnderline { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* ── Mobile menu ──────────────────────────────────────────────── */
.menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem; height: 2.25rem;
    border-radius: 0.5rem;
    color: var(--muted);
}
.menu-btn:hover { background: var(--bg-soft); color: var(--text); }

.mobile-menu {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.32s ease, opacity 0.32s ease;
    border-top: 1px solid transparent;
}
.mobile-menu.open {
    max-height: 22rem;
    opacity: 1;
    border-top-color: var(--border);
}
.mobile-menu a {
    display: block;
    padding: 0.85rem 0;
    color: var(--muted);
    border-bottom: 1px solid var(--border);
    font-weight: 500;
    transition: color 0.15s ease, padding-left 0.15s ease;
}
.mobile-menu a:hover { color: var(--text); padding-left: 0.4rem; }

/* ── Command palette (⌘K) ─────────────────────────────────────── */
.cmdk-overlay {
    position: fixed; inset: 0; z-index: 100;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding-top: 14vh;
    background: rgba(10,10,16,0.62);
    backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity 0.18s ease;
}
.cmdk-overlay.open { display: flex; opacity: 1; }

.cmdk-panel {
    width: min(620px, 92vw);
    background: #1c1d29;
    border: 1px solid var(--border-hi);
    border-radius: 16px;
    box-shadow: 0 24px 70px -12px rgba(0,0,0,0.7);
    overflow: hidden;
    transform: translateY(-8px) scale(0.985);
    transition: transform 0.2s cubic-bezier(0.16,1,0.3,1);
}
.cmdk-overlay.open .cmdk-panel { transform: none; }

.cmdk-input-row {
    display: flex; align-items: center; gap: 0.6rem;
    padding: 0.95rem 1.1rem;
    border-bottom: 1px solid var(--border);
}
.cmdk-input-row i { color: var(--muted); }
.cmdk-input {
    flex: 1;
    background: transparent;
    border: none; outline: none;
    color: var(--text);
    font-size: 1rem;
    font-family: 'Inter Tight', sans-serif;
}
.cmdk-input::placeholder { color: #565f89; }
.cmdk-hintkey {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    color: var(--muted);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 0.1rem 0.4rem;
}

.cmdk-list { max-height: 52vh; overflow-y: auto; padding: 0.5rem; }
.cmdk-group-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #565f89;
    padding: 0.6rem 0.7rem 0.3rem;
}
.cmdk-item {
    display: flex; align-items: center; gap: 0.8rem;
    padding: 0.6rem 0.7rem;
    border-radius: 9px;
    cursor: pointer;
    color: var(--muted);
}
.cmdk-item .ci-icon {
    width: 1.6rem; height: 1.6rem;
    display: flex; align-items: center; justify-content: center;
    border-radius: 6px;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--blue);
    flex-shrink: 0;
}
.cmdk-item .ci-label { color: var(--text); font-weight: 500; font-size: 0.92rem; }
.cmdk-item .ci-hint { color: #565f89; font-size: 0.78rem; margin-left: auto; }
.cmdk-item.active, .cmdk-item:hover { background: var(--bg-soft); }
.cmdk-item.active { box-shadow: inset 0 0 0 1px var(--border-hi); }
.cmdk-empty { padding: 1.4rem 0.7rem; color: #565f89; font-size: 0.9rem; text-align: center; }

/* ── Code copy button ─────────────────────────────────────────── */
.code-wrap { position: relative; }
.copy-btn {
    position: absolute; top: 0.6rem; right: 0.6rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.66rem;
    letter-spacing: 0.05em;
    color: var(--muted);
    background: #1c1d29;
    border: 1px solid var(--border);
    border-radius: 7px;
    padding: 0.28rem 0.55rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.code-wrap:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: var(--text); border-color: var(--border-hi); }
.copy-btn.copied { color: var(--green); border-color: #2a3a2a; }

/* ── Donate / support chips ───────────────────────────────────── */
.donate-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-soft);
    color: var(--muted);
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    transition: border-color 0.15s ease, color 0.15s ease, transform 0.1s ease;
}
.donate-chip:hover { border-color: var(--border-hi); color: var(--text); }
.donate-chip:active { transform: translateY(1px); }
.donate-chip .dc-tic { font-weight: 600; color: var(--text); }
.donate-chip .dc-addr {
    color: #565f89;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.donate-chip.copied { border-color: #2a3a2a; color: var(--green); }
.donate-chip.copied .dc-tic { color: var(--green); }
.dc-btc { color: #f7931a; }
.dc-xmr { color: #ff6600; }

.donate-card { display: flex; flex-direction: column; align-items: center; gap: 0.6rem; }
.qr-card {
    background: #fff;
    padding: 8px;
    border-radius: 12px;
    line-height: 0;
    box-shadow: 0 0 0 1px var(--border);
}
.qr-card img { display: block; width: 128px; height: 128px; }
.dc-coin {
    display: inline-flex; align-items: center; gap: 0.45rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text);
}

/* ── Back to top ──────────────────────────────────────────────── */
.to-top {
    position: fixed; right: 1.5rem; bottom: 1.5rem; z-index: 40;
    width: 2.75rem; height: 2.75rem;
    display: flex; align-items: center; justify-content: center;
    border-radius: 12px;
    background: #1c1d29;
    border: 1px solid var(--border);
    color: var(--muted);
    cursor: pointer;
    opacity: 0; pointer-events: none;
    transform: translateY(8px);
    transition: opacity 0.25s ease, transform 0.25s ease, color 0.15s ease;
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { color: var(--text); border-color: var(--border-hi); }