/* ========================================================
   ChemHub — Hub Page Styles
   ======================================================== */

/* ── Header overrides ── */
.app-header {
    padding: 32px 0 0;
    text-align: left;
}
.header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
}
.header-badge { flex-shrink: 0; }

/* ── Hero Section ── */
.hero {
    position: relative;
    text-align: center;
    padding: 56px 24px 52px;
    max-width: 900px;
    margin: 0 auto;
}

.hero-molecule-ornament {
    position: absolute;
    top: 0; right: -40px;
    width: 120px; height: 120px;
    color: var(--accent);
    opacity: 0.15;
    animation: float-slow 6s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes float-slow {
    from { transform: translateY(0) rotate(0deg); }
    to { transform: translateY(-20px) rotate(15deg); }
}

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--accent-dim);
    border: 1px solid rgba(0, 229, 255, 0.25);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.04em;
    margin-bottom: 28px;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #fff 0%, var(--accent) 50%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 580px;
    margin: 0 auto 36px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

.stat {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    column-gap: 11px;
    row-gap: 1px;
    min-width: 190px;
    min-height: 44px;
    padding: 8px 18px;
    background: var(--surface-inset);
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    box-shadow: 0 10px 28px rgba(0,0,0,0.10), inset 0 1px 0 rgba(255,255,255,0.04);
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
}

.stat:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    box-shadow: 0 12px 32px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.06);
}

.stat::before {
    content: attr(data-icon);
    grid-row: 1 / 3;
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--accent-dim);
    color: var(--accent);
    font-size: 0.86rem;
}

.stat-num {
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-sep {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.45;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    margin-top: 28px;
    padding: 11px 20px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), #c21875);
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 8px 22px var(--accent-dim);
    transition: transform 180ms ease, box-shadow 180ms ease;
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px var(--accent-glow);
}

/* ── Tool Grid ── */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
    gap: 24px;
    padding-bottom: 60px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* ── Tool Cards ── */
.tool-card {
    position: relative;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 0;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition:
        transform 0.35s var(--ease-out),
        box-shadow 0.35s var(--ease-out),
        border-color 0.35s var(--ease-out);
}

.tool-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4), 0 0 15px var(--ambient-glow);
}

:root.light-theme .tool-card:hover {
    box-shadow: 0 20px 40px rgba(0,0,0,0.08), 0 0 15px var(--ambient-glow);
}

/* Glow orb behind each card */
.tool-card-glow {
    position: absolute;
    width: 200px; height: 200px;
    border-radius: 50%;
    top: -60px; right: -60px;
    opacity: 0;
    filter: blur(60px);
    transition: opacity 0.5s ease;
    pointer-events: none;
}
.tool-card:hover .tool-card-glow { opacity: 1; }

.glow-cyan   { background: var(--accent-glow); }
.glow-purple { background: var(--accent-purple-glow); }
.glow-green  { background: var(--accent-green-glow); }
.glow-gold   { background: var(--accent-gold-glow); }
.glow-gradient { background: radial-gradient(circle, var(--accent-glow), var(--accent-purple-glow)); }
.glow-gold     { background: radial-gradient(circle, rgba(251,191,36,0.4), rgba(245,158,11,0.2)); }
.glow-orange   { background: radial-gradient(circle, rgba(251,146,60,0.5), rgba(239,68,68,0.3)); }

/* Card hover border */
#card-adme:hover      { border-color: rgba(0, 229, 255, 0.35); }
#card-docking:hover   { border-color: rgba(168, 85, 247, 0.35); }
#card-viewer:hover    { border-color: rgba(0, 229, 255, 0.25); }
#card-elements:hover  { border-color: rgba(251,191,36,0.35); }
#card-chemcalc:hover  { border-color: rgba(16, 185, 129, 0.35); }
#card-enthalpy:hover  { border-color: rgba(251,146,60,0.45); }

/* ── Card Header ── */
.tool-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 18px;
}

.tool-icon-wrap {
    width: 52px; height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    flex-shrink: 0;
}
.tool-icon-wrap svg { width: 100%; height: 100%; }

.icon-cyan     { background: var(--accent-dim);        color: var(--accent);        border: 1px solid rgba(0,229,255,0.25); }
.icon-purple   { background: var(--accent-purple-dim); color: var(--accent-purple); border: 1px solid rgba(168,85,247,0.25); }
.icon-green    { background: var(--accent-green-dim);  color: var(--accent-green);  border: 1px solid rgba(16,185,129,0.25); }
.icon-gold     { background: var(--accent-gold-dim);   color: var(--accent-gold);   border: 1px solid rgba(251,191,36,0.25); }
.icon-gradient {
    background: linear-gradient(135deg, var(--accent-dim), var(--accent-purple-dim));
    color: var(--accent);
    border: 1px solid rgba(0,229,255,0.2);
}
.icon-gold   { background: rgba(251,191,36,0.12); color: #fbbf24; border: 1px solid rgba(251,191,36,0.25); }
.icon-orange { background: rgba(251,146,60,0.12); color: #fb923c; border: 1px solid rgba(251,146,60,0.25); }

/* ── Card Body ── */
.tool-card-name {
    font-size: 1.18rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.tool-card-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 18px;
    flex: 1;
}

/* ── Card Tags ── */
.tool-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
}

.tool-tag {
    padding: 3px 10px;
    font-size: 0.72rem;
    font-weight: 500;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 999px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ── Card Footer ── */
.tool-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.tool-card-source {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.tool-launch-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 18px;
    font-size: 0.84rem;
    font-weight: 600;
    font-family: var(--font-sans);
    border: none;
    border-radius: var(--radius-md);
    cursor: inherit;
    transition: all var(--duration) var(--ease-out);
    pointer-events: none; /* card itself is clickable */
}

.btn-cyan,
.btn-purple,
.btn-green,
.btn-gold,
.btn-gradient,
.btn-orange {
    background: linear-gradient(135deg, var(--accent), #c21875);
    color: #fff;
    box-shadow: 0 2px 12px var(--accent-dim);
}
.tool-card:hover .tool-launch-btn { box-shadow: 0 4px 20px var(--accent-glow); }

/* ── Coming Soon overlay (for future cards) ── */
.tool-card.coming-soon {
    cursor: default;
    opacity: 0.65;
}
.tool-card.coming-soon:hover {
    transform: none;
    box-shadow: 0 4px 30px rgba(0,0,0,0.4);
}

/* ── Responsive ── */
@media (max-width: 960px) {
    .hero-title { font-size: 2rem; }
    .hero { padding: 40px 0 36px; }
    .tool-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
    .header-content { align-items: flex-start; }
    .header-controls { width: 100%; justify-content: space-between; }
    .hero-stats { gap: 10px; }
    .stat { min-width: min(100%, 250px); }
    .hero-molecule-ornament { right: 0; width: 84px; height: 84px; }
    .tool-card-footer { flex-direction: column; gap: 12px; align-items: flex-start; }
    .tool-launch-btn { align-self: stretch; text-align: center; }
}

/* ═══════════════════════════════════════════
   LIGHT THEME OVERRIDES — Hub Page
   ═══════════════════════════════════════════ */

/* Hero title: luminous rose-to-purple gradient (avoids near-black start) */
[data-theme="light"] .hero-title {
    background: linear-gradient(135deg, #ff5faa 0%, var(--accent) 45%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 2px 16px rgba(181, 0, 95, 0.18));
}

/* Hero tag */
[data-theme="light"] .hero-tag {
    background: var(--accent-dim);
    border-color: var(--accent-glow);
    color: var(--accent);
}

/* Stat separator */
[data-theme="light"] .stat-sep {
    background: rgba(200, 0, 106, 0.16);
}

/* Tool tags */
[data-theme="light"] .tool-tag {
    background: rgba(200, 0, 106, 0.06);
    border-color: rgba(200, 0, 106, 0.14);
    color: var(--text-muted);
}

/* Card footer border */
[data-theme="light"] .tool-card-footer {
    border-top-color: rgba(200, 0, 106, 0.10);
}

/* Card hover shadow */
[data-theme="light"] .tool-card:hover {
    box-shadow: var(--shadow-hover);
}

/* Card hover border accents — pink for cyan cards, purple stays purple */
[data-theme="light"] #card-adme:hover      { border-color: rgba(200, 0, 106, 0.40); }
[data-theme="light"] #card-docking:hover   { border-color: rgba(156, 39, 176, 0.38); }
[data-theme="light"] #card-viewer:hover    { border-color: rgba(200, 0, 106, 0.32); }
[data-theme="light"] #card-elements:hover  { border-color: rgba(160, 100, 0, 0.35); }
[data-theme="light"] #card-enthalpy:hover  { border-color: rgba(190, 60, 0, 0.35); }

/* Glow orbs on light — rose-pink tinted, subtle */
[data-theme="light"] .glow-cyan     { background: rgba(200, 0, 106, 0.18); }
[data-theme="light"] .glow-purple   { background: rgba(156, 39, 176, 0.18); }
[data-theme="light"] .glow-gradient { background: radial-gradient(circle, rgba(200, 0, 106, 0.18), rgba(156, 39, 176, 0.16)); }
[data-theme="light"] .glow-gold     { background: radial-gradient(circle, rgba(160, 100, 0, 0.20), rgba(180, 110, 0, 0.12)); }
[data-theme="light"] .glow-orange   { background: radial-gradient(circle, rgba(190, 60, 0, 0.20), rgba(170, 40, 40, 0.14)); }

/* Icon wraps on light — warm pink tints */
[data-theme="light"] .icon-cyan     { background: rgba(200, 0, 106, 0.09); border-color: rgba(200, 0, 106, 0.22); color: var(--accent); }
[data-theme="light"] .icon-purple   { background: rgba(156, 39, 176, 0.09); border-color: rgba(156, 39, 176, 0.22); }
[data-theme="light"] .icon-gradient { background: linear-gradient(135deg, rgba(200,0,106,0.09), rgba(156,39,176,0.09)); border-color: rgba(200,0,106,0.18); }
[data-theme="light"] .icon-gold     { background: rgba(160, 100, 0, 0.10); border-color: rgba(160, 100, 0, 0.22); }
[data-theme="light"] .icon-orange   { background: rgba(190, 60, 0, 0.10); border-color: rgba(190, 60, 0, 0.22); }

/* Coming soon card on light */
[data-theme="light"] .tool-card.coming-soon:hover {
    box-shadow: var(--shadow-card);
}