/* ============================================================================
   Electron Configuration Builder — ToolAdda Chemistry Lab UI
   ============================================================================ */

.ecb-page {
  color: var(--text-primary);
  --bg: #eef4fb;
  --surface: #ffffff;
  --surface-raised: #f8fafc;
  --surface-hover: #f1f5f9;
  --border: rgba(15, 23, 42, .1);
  --border-strong: rgba(15, 23, 42, .18);
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --muted: #64748b;
  --accent: #0284c7;
  --accent-soft: rgba(2, 132, 199, .12);
  --electron: #d97706;
  --orbital-s: #0284c7;
  --orbital-p: #7c3aed;
  --orbital-d: #059669;
  --orbital-f: #e11d48;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
  --shadow-md: 0 8px 28px rgba(15, 23, 42, .08);
  --shadow-lg: 0 18px 48px rgba(15, 23, 42, .1);
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 22px;
  --font-ui: Inter, "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "Cascadia Code", "Consolas", monospace;
}

[data-theme="dark"] .ecb-page {
  --bg: #0a0e17;
  --surface: #111827;
  --surface-raised: #1a2234;
  --surface-hover: #243049;
  --border: rgba(148, 163, 184, .14);
  --border-strong: rgba(148, 163, 184, .28);
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, .14);
  --electron: #fbbf24;
  --orbital-s: #38bdf8;
  --orbital-p: #a78bfa;
  --orbital-d: #34d399;
  --orbital-f: #fb7185;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, .25);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, .35);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, .45);
}

.ecb-sr {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---- shell ---- */
.ecb-shell {
  position: relative;
  padding: 0 0 3rem;
  background:
    radial-gradient(ellipse 70% 50% at 10% -10%, rgba(56, 189, 248, .12), transparent 55%),
    radial-gradient(ellipse 55% 45% at 95% 5%, rgba(167, 139, 250, .1), transparent 50%),
    var(--bg);
}
.ecb-shell::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .35;
  background-image:
    linear-gradient(rgba(56, 189, 248, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, .04) 1px, transparent 1px);
  background-size: 32px 32px;
}
[data-theme="dark"] .ecb-shell::before { opacity: .22; }
.ecb-wrap { position: relative; z-index: 1; max-width: 72rem; margin: 0 auto; padding: 0 1rem; }

.ecb-page .site-header + #main-content > :first-child:not(.home-hero-wrap) {
  padding-top: calc(var(--header-overlap) + .15rem);
}

/* ---- crumb ---- */
.ecb-crumb {
  display: flex; flex-wrap: wrap; gap: .35rem; align-items: center;
  padding: .75rem 0 .35rem; font-size: .82rem; color: var(--muted);
}
.ecb-crumb a { color: var(--accent); text-decoration: none; font-weight: 600; }
.ecb-crumb a:hover { text-decoration: underline; }

/* ---- hero ---- */
.ecb-hero {
  padding: .5rem 0 1.25rem;
}
.ecb-hero__eyebrow {
  display: inline-flex; align-items: center; gap: .35rem;
  font-size: .62rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); padding: .22rem .65rem; border-radius: 999px;
  background: var(--accent-soft); border: 1px solid rgba(56, 189, 248, .25);
}
.ecb-hero__title {
  margin: .55rem 0 .35rem; font-size: clamp(1.6rem, 4vw, 2.35rem);
  font-weight: 900; letter-spacing: -.03em; line-height: 1.08; color: var(--text-primary);
}
.ecb-hero__lede {
  margin: 0; max-width: 62ch; font-size: 1.02rem; line-height: 1.65; color: var(--text-secondary);
}
.ecb-hero__badges {
  display: flex; flex-wrap: wrap; gap: .4rem; margin: 1rem 0 0; padding: 0; list-style: none;
}
.ecb-hero__badges li {
  font-size: .76rem; font-weight: 650; color: var(--text-secondary);
  padding: .32rem .68rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
}

/* ---- app ---- */
.ecb-app {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.ecb-app::before {
  content: ""; display: block; height: 3px;
  background: linear-gradient(90deg, var(--orbital-s), var(--orbital-p), var(--orbital-d), var(--orbital-f));
}

.ecb-workspace {
  display: grid;
  grid-template-columns: minmax(0, 22rem) minmax(0, 1fr);
  gap: 0;
  align-items: start;
}

/* ---- panels ---- */
.ecb-panel {
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--border);
}
.ecb-panel--select {
  border-right: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface-raised), var(--surface));
}
.ecb-panel__title {
  margin: 0 0 .75rem; font-size: .72rem; font-weight: 800;
  letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
}
.ecb-panel__title span { color: var(--accent); }

/* ---- form controls ---- */
.ecb-field { margin-bottom: .85rem; }
.ecb-field label {
  display: block; margin-bottom: .3rem;
  font-size: .74rem; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; color: var(--muted);
}
.ecb-input, .ecb-select {
  width: 100%; font: inherit; color: var(--text-primary);
  padding: .55rem .75rem; border-radius: var(--r-sm);
  border: 1px solid var(--border-strong); background: var(--surface-raised);
  transition: border-color .15s, box-shadow .15s;
}
.ecb-input:focus, .ecb-select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.ecb-search-wrap { position: relative; }
.ecb-search-wrap .ecb-input { padding-left: 2.2rem; }
.ecb-search-icon {
  position: absolute; left: .7rem; top: 50%; transform: translateY(-50%);
  color: var(--muted); pointer-events: none;
}
.ecb-suggest {
  position: absolute; left: 0; right: 0; top: calc(100% + 4px); z-index: 20;
  margin: 0; padding: .35rem; list-style: none;
  background: var(--surface); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); box-shadow: var(--shadow-md);
  max-height: 14rem; overflow-y: auto;
}
.ecb-suggest[hidden] { display: none; }
.ecb-suggest li button {
  width: 100%; text-align: left; font: inherit; cursor: pointer;
  padding: .5rem .65rem; border: 0; border-radius: var(--r-sm);
  background: transparent; color: var(--text-primary);
}
.ecb-suggest li button:hover, .ecb-suggest li button:focus-visible {
  background: var(--surface-hover); outline: none;
}
.ecb-suggest__sym { font-weight: 800; color: var(--accent); margin-right: .4rem; }
.ecb-suggest__meta { font-size: .78rem; color: var(--muted); }

.ecb-error {
  margin: .35rem 0 0; font-size: .82rem; font-weight: 600; color: var(--danger);
}
.ecb-error[hidden] { display: none; }

.ecb-nav-row {
  display: flex; gap: .45rem; margin-top: .5rem;
}
.ecb-btn {
  font: inherit; font-weight: 650; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: .35rem;
  padding: .48rem .85rem; border-radius: var(--r-sm);
  border: 1px solid var(--border-strong); background: var(--surface-raised);
  color: var(--text-primary); transition: background .15s, border-color .15s, transform .12s;
}
.ecb-btn:hover { background: var(--surface-hover); border-color: var(--accent); }
.ecb-btn:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.ecb-btn--primary {
  background: linear-gradient(135deg, #0369a1, var(--accent));
  border-color: transparent; color: #fff;
}
.ecb-btn--primary:hover { filter: brightness(1.06); }

.ecb-input, .ecb-select {
  color: var(--text-primary);
  background-color: var(--surface-raised);
}
.ecb-input::placeholder { color: var(--muted); }

.ecb-config { color: var(--text-primary); }
.ecb-element-head h2 { color: var(--text-primary); }
.ecb-hero__title { color: var(--text-primary); }
.ecb-content h2, .ecb-content h3 { color: var(--text-primary); }
.ecb-faq summary { color: var(--text-primary); }
.ecb-related b { color: var(--text-primary); }

.ecb-spin-down { color: #2563eb; }
[data-theme="dark"] .ecb-spin-down { color: #60a5fa; }
.ecb-btn--ghost { background: transparent; }
.ecb-btn:disabled { opacity: .45; cursor: not-allowed; }
.ecb-btn--sm { padding: .38rem .65rem; font-size: .84rem; }

.ecb-toggle-row {
  display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .65rem;
}
.ecb-toggle-row label {
  display: inline-flex; align-items: center; gap: .35rem;
  font-size: .82rem; font-weight: 600; color: var(--text-secondary);
  cursor: pointer;
}

/* ---- element header ---- */
.ecb-element-head {
  display: grid; grid-template-columns: auto 1fr; gap: 1rem; align-items: start;
  padding: 1rem 1.1rem; border-bottom: 1px solid var(--border);
  background: linear-gradient(135deg, var(--accent-soft), transparent 60%);
}
.ecb-glyph {
  width: 5rem; height: 5rem; display: flex; flex-direction: column;
  align-items: center; justify-content: center; border-radius: var(--r-md);
  border: 2px solid var(--accent); background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.ecb-glyph__z { font-size: .68rem; font-weight: 800; color: var(--muted); }
.ecb-glyph__sym { font-size: 2rem; font-weight: 900; line-height: 1; letter-spacing: -.03em; }
.ecb-glyph__mass { font-size: .62rem; color: var(--muted); }
.ecb-element-head h2 {
  margin: 0; font-size: clamp(1.35rem, 3vw, 1.75rem); letter-spacing: -.02em;
}
.ecb-meta-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(7.5rem, 1fr));
  gap: .45rem; margin-top: .55rem;
}
.ecb-meta-grid dt { font-size: .66rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.ecb-meta-grid dd { margin: .1rem 0 0; font-size: .88rem; font-weight: 650; color: var(--text-primary); }

.ecb-exception {
  margin: .55rem 0 0; padding: .45rem .65rem; border-radius: var(--r-sm);
  font-size: .8rem; font-weight: 600; color: var(--warning);
  background: rgba(245, 158, 11, .12); border: 1px solid rgba(245, 158, 11, .25);
}
.ecb-exception[hidden] { display: none; }

/* ---- config display ---- */
.ecb-config-block {
  padding: 1rem 1.1rem; border-bottom: 1px solid var(--border);
}
.ecb-config-block h3 {
  margin: 0 0 .45rem; font-size: .72rem; font-weight: 800;
  letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
}
.ecb-config {
  font-family: var(--font-mono); font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  letter-spacing: .02em; color: var(--text-primary); word-break: break-word;
}
.ecb-config sup { font-size: .72em; font-weight: 700; }
.ecb-config-tabs {
  display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: .65rem;
}
.ecb-config-tabs button {
  font: inherit; font-size: .78rem; font-weight: 700; cursor: pointer;
  padding: .32rem .7rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface-raised); color: var(--muted);
}
.ecb-config-tabs button[aria-pressed="true"] {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.ecb-charge-card {
  display: flex; flex-wrap: wrap; gap: .75rem 1.25rem;
  margin-top: .65rem; padding: .65rem .8rem; border-radius: var(--r-md);
  background: var(--surface-raised); border: 1px solid var(--border);
}
.ecb-charge-card div { font-size: .88rem; }
.ecb-charge-card strong { color: var(--accent); }

/* ---- shells ---- */
.ecb-shells {
  padding: 1rem 1.1rem; border-bottom: 1px solid var(--border);
}
.ecb-shells h3, .ecb-orbitals h3, .ecb-aufbau h3, .ecb-legend h3 {
  margin: 0 0 .65rem; font-size: .72rem; font-weight: 800;
  letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
}
.ecb-shell-list { display: grid; gap: .55rem; }
.ecb-shell-item {
  display: grid; grid-template-columns: 1fr auto; gap: .5rem; align-items: center;
  padding: .55rem .7rem; border-radius: var(--r-md);
  background: var(--surface-raised); border: 1px solid var(--border);
}
.ecb-shell-item__label { font-weight: 700; color: var(--text-primary); }
.ecb-shell-item__count { font-weight: 800; color: var(--accent); }
.ecb-shell-viz {
  grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: .35rem;
  justify-content: center; padding: .45rem 0 .15rem;
}
.ecb-shell-dot {
  width: .65rem; height: .65rem; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff, var(--electron));
  box-shadow: 0 0 8px rgba(251, 191, 36, .45);
}
.ecb-shell-note {
  margin: .55rem 0 0; font-size: .78rem; color: var(--muted); font-style: italic;
}

/* ---- orbitals ---- */
.ecb-orbitals { padding: 1rem 1.1rem; border-bottom: 1px solid var(--border); }
.ecb-subshell-group { margin-bottom: 1rem; }
.ecb-subshell-group:last-child { margin-bottom: 0; }
.ecb-subshell-label {
  display: inline-flex; align-items: center; gap: .4rem;
  margin-bottom: .45rem; font-size: .88rem; font-weight: 800;
}
.ecb-subshell-label[data-type="s"] { color: var(--orbital-s); }
.ecb-subshell-label[data-type="p"] { color: var(--orbital-p); }
.ecb-subshell-label[data-type="d"] { color: var(--orbital-d); }
.ecb-subshell-label[data-type="f"] { color: var(--orbital-f); }
.ecb-subshell-label span {
  font-size: .66rem; font-weight: 700; text-transform: uppercase;
  padding: .12rem .4rem; border-radius: 999px;
  background: var(--surface-raised); border: 1px solid var(--border);
  color: var(--muted);
}
.ecb-orbital-row { display: flex; flex-wrap: wrap; gap: .45rem; }
.ecb-orbital-box {
  min-width: 3.2rem; min-height: 3.2rem;
  display: flex; align-items: center; justify-content: center; gap: .1rem;
  padding: .35rem .45rem; border-radius: var(--r-sm);
  border: 2px solid var(--border-strong); background: var(--surface-raised);
  font-size: 1.05rem; font-weight: 800; transition: border-color .2s, box-shadow .2s;
}
.ecb-orbital-box.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft), 0 0 16px rgba(56, 189, 248, .2);
}
.ecb-orbital-box[data-type="s"] { border-color: color-mix(in srgb, var(--orbital-s) 45%, var(--border)); }
.ecb-orbital-box[data-type="p"] { border-color: color-mix(in srgb, var(--orbital-p) 45%, var(--border)); }
.ecb-orbital-box[data-type="d"] { border-color: color-mix(in srgb, var(--orbital-d) 45%, var(--border)); }
.ecb-orbital-box[data-type="f"] { border-color: color-mix(in srgb, var(--orbital-f) 45%, var(--border)); }
.ecb-spin-up { color: var(--electron); }
.ecb-spin-down { color: #60a5fa; }

/* ---- animation controls ---- */
.ecb-controls {
  padding: 1rem 1.1rem; border-bottom: 1px solid var(--border);
  background: var(--surface-raised);
}
.ecb-controls__row {
  display: flex; flex-wrap: wrap; gap: .45rem; align-items: center;
}
.ecb-step-info {
  margin: .65rem 0 0; font-size: .84rem; color: var(--text-secondary); line-height: 1.5;
}
.ecb-step-info strong { color: var(--accent); }
.ecb-speed {
  display: inline-flex; align-items: center; gap: .35rem; margin-left: auto;
  font-size: .82rem; color: var(--muted); font-weight: 600;
}
.ecb-speed select {
  font: inherit; padding: .3rem .5rem; border-radius: var(--r-sm);
  border: 1px solid var(--border); background: var(--surface); color: var(--text-primary);
}

/* ---- aufbau ---- */
.ecb-aufbau { padding: 1rem 1.1rem; border-bottom: 1px solid var(--border); }
.ecb-aufbau-track {
  display: flex; flex-wrap: wrap; gap: .35rem;
}
.ecb-aufbau-item {
  font-family: var(--font-mono); font-size: .78rem; font-weight: 700;
  padding: .28rem .55rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface-raised); color: var(--muted);
}
.ecb-aufbau-item.is-filled {
  color: var(--text-primary); border-color: var(--accent);
  background: var(--accent-soft);
}
.ecb-aufbau-item.is-current {
  box-shadow: 0 0 0 2px var(--accent);
}

/* ---- table ---- */
.ecb-table-wrap {
  padding: 1rem 1.1rem; border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.ecb-table {
  width: 100%; min-width: 22rem; border-collapse: collapse; font-size: .88rem;
}
.ecb-table th, .ecb-table td {
  padding: .5rem .65rem; border-bottom: 1px solid var(--border); text-align: left;
}
.ecb-table thead th {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted);
}
.ecb-table tbody tr:hover { background: var(--surface-hover); }

/* ---- mini periodic table ---- */
.ecb-mini-pt {
  padding: 1rem 1.1rem; border-bottom: 1px solid var(--border);
}
.ecb-mini-pt h3 { margin: 0 0 .65rem; font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.ecb-mini-grid {
  display: grid; grid-template-columns: repeat(18, minmax(0, 1fr)); gap: 2px;
  overflow-x: auto; padding-bottom: .25rem;
}
.ecb-mini-tile {
  font: inherit; font-size: .58rem; font-weight: 800; cursor: pointer;
  aspect-ratio: 1; min-width: 1.4rem; padding: 0;
  border: 1px solid var(--border); border-radius: 3px;
  background: var(--surface-raised); color: var(--text-secondary);
  transition: transform .12s, border-color .12s;
}
.ecb-mini-tile:hover { transform: scale(1.08); border-color: var(--accent); }
.ecb-mini-tile.is-selected {
  border-color: var(--accent); background: var(--accent-soft);
  box-shadow: 0 0 0 1px var(--accent);
}
.ecb-mini-tile[data-block="f"] { font-size: .5rem; }
.ecb-mini-gap { visibility: hidden; pointer-events: none; }

/* ---- legend ---- */
.ecb-legend { padding: 1rem 1.1rem; }
.ecb-legend-grid {
  display: flex; flex-wrap: wrap; gap: .5rem 1rem;
}
.ecb-legend-item {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .78rem; font-weight: 600; color: var(--text-secondary);
}
.ecb-legend-swatch {
  width: .85rem; height: .85rem; border-radius: 4px; flex: none;
  border: 1.5px solid currentColor;
}
.ecb-legend-swatch--s { color: var(--orbital-s); background: color-mix(in srgb, var(--orbital-s) 25%, transparent); }
.ecb-legend-swatch--p { color: var(--orbital-p); background: color-mix(in srgb, var(--orbital-p) 25%, transparent); }
.ecb-legend-swatch--d { color: var(--orbital-d); background: color-mix(in srgb, var(--orbital-d) 25%, transparent); }
.ecb-legend-swatch--f { color: var(--orbital-f); background: color-mix(in srgb, var(--orbital-f) 25%, transparent); }

/* ---- learning mode ---- */
.ecb-learn {
  padding: .85rem 1.1rem; border-top: 1px solid var(--border);
  background: linear-gradient(90deg, var(--accent-soft), transparent);
}
.ecb-learn[hidden] { display: none; }
.ecb-learn h3 { margin: 0 0 .45rem; font-size: .88rem; color: var(--text-primary); }
.ecb-learn p { margin: 0 0 .55rem; font-size: .84rem; line-height: 1.6; color: var(--text-secondary); }
.ecb-learn p:last-child { margin-bottom: 0; }

/* ---- editorial content ---- */
.ecb-content { margin-top: 2rem; }
.ecb-content section {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 1.25rem 1.35rem;
  margin-bottom: 1rem; box-shadow: var(--shadow-sm);
}
.ecb-content h2 { margin: 0 0 .65rem; font-size: 1.25rem; letter-spacing: -.02em; }
.ecb-content h3 { margin: 1rem 0 .45rem; font-size: 1.05rem; }
.ecb-content p, .ecb-content li { color: var(--text-secondary); line-height: 1.72; }
.ecb-content ul, .ecb-content ol { padding-left: 1.2rem; }
.ecb-answer {
  padding: .75rem .9rem; margin: .65rem 0; border-radius: var(--r-md);
  background: var(--accent-soft); border-left: 3px solid var(--accent);
}
.ecb-answer p { margin: 0; color: var(--text-primary); font-weight: 600; }
.ecb-faq { display: grid; gap: .55rem; margin-top: .75rem; }
.ecb-faq details {
  border: 1px solid var(--border); border-radius: var(--r-md);
  background: var(--surface-raised); padding: .65rem .85rem;
}
.ecb-faq summary { cursor: pointer; font-weight: 700; color: var(--text-primary); }
.ecb-faq p { margin: .45rem 0 0; font-size: .92rem; }
.ecb-related { display: grid; grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr)); gap: .65rem; }
.ecb-related a {
  display: block; padding: .85rem; border-radius: var(--r-md);
  border: 1px solid var(--border); background: var(--surface-raised);
  text-decoration: none; color: inherit; transition: border-color .15s, transform .12s;
}
.ecb-related a:hover { border-color: var(--accent); transform: translateY(-2px); }
.ecb-related b { display: block; margin-bottom: .25rem; color: var(--text-primary); }
.ecb-related span { font-size: .84rem; color: var(--muted); }

/* ---- navbar / site chrome (match chemistry tools family) ---- */
.ecb-page .navbar {
  border-color: rgba(2, 132, 199, .14) !important;
  box-shadow: 0 1px 0 rgba(255, 255, 255, .95) inset, 0 16px 48px rgba(2, 132, 199, .08), 0 4px 12px rgba(15, 23, 42, .05) !important;
}
[data-theme="dark"] .ecb-page .navbar {
  border-color: rgba(56, 189, 248, .2) !important;
  box-shadow: 0 1px 0 rgba(255, 255, 255, .05) inset, 0 16px 48px rgba(0, 0, 0, .35) !important;
}
.ecb-page .navbar::before {
  background: linear-gradient(135deg, rgba(2, 132, 199, .42), rgba(56, 189, 248, .28), rgba(99, 102, 241, .22)) !important;
}
.ecb-page .brand-mark {
  background: linear-gradient(145deg, #0284c7, #38bdf8, #6366f1) !important;
  box-shadow: 0 8px 22px rgba(2, 132, 199, .32) !important;
}
.ecb-page .brand > span:last-child {
  background: linear-gradient(135deg, #0c4a6e, #0284c7, #6366f1) !important;
  -webkit-background-clip: text !important; background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
}
[data-theme="dark"] .ecb-page .brand > span:last-child {
  background: linear-gradient(135deg, #e0f2fe, #7dd3fc, #a5b4fc) !important;
  -webkit-background-clip: text !important; background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
}
.ecb-page .nav-links {
  background: rgba(2, 132, 199, .05) !important;
  border-color: rgba(2, 132, 199, .1) !important;
}
[data-theme="dark"] .ecb-page .nav-links {
  background: rgba(56, 189, 248, .08) !important;
}
.ecb-page .icon-btn { border-color: rgba(2, 132, 199, .14) !important; }

/* ---- responsive ---- */
@media (max-width: 960px) {
  .ecb-workspace { grid-template-columns: 1fr; }
  .ecb-panel--select { border-right: 0; }
}
@media (max-width: 640px) {
  .ecb-wrap { padding: 0 .75rem; }
  .ecb-orbital-box { min-width: 2.75rem; min-height: 2.75rem; font-size: .95rem; }
  .ecb-mini-tile { min-width: 1.25rem; font-size: .52rem; }
  .ecb-nav-row .ecb-btn { flex: 1 1 auto; }
}
@media (prefers-reduced-motion: reduce) {
  .ecb-orbital-box, .ecb-mini-tile, .ecb-related a, .ecb-btn { transition: none; }
  .ecb-shell-dot { box-shadow: none; }
}

@media print {
  .ecb-panel--select, .ecb-controls, .ecb-mini-pt, .ecb-suggest { display: none !important; }
  .ecb-workspace { grid-template-columns: 1fr; }
}