/* Simdsoft Learn & Download Center - light-first minimal docs style */

:root {
  --sd-gradient: linear-gradient(135deg, #0d9488 0%, #2dd4bf 100%);
  --sd-teal-rgb: 13, 148, 136;
  --sd-teal: #0d9488;
  --sd-teal-soft: rgba(13, 148, 136, 0.1);
}

[data-bs-theme="dark"] {
  --bs-primary: #2dd4bf;
  --bs-primary-rgb: 45, 212, 191;
  --bs-link-color: #5eead4;
  --bs-link-hover-color: #99f6e4;
  --bs-body-bg: #0f172a;
  --bs-body-color: #cbd5e1;
  --bs-border-color: rgba(148, 163, 184, 0.16);
  --bs-card-bg: rgba(30, 41, 59, 0.6);
  --bs-card-border-color: rgba(148, 163, 184, 0.16);
  --sd-glass-bg: rgba(15, 23, 42, 0.78);
  --sd-glass-border: rgba(148, 163, 184, 0.14);
  --sd-muted: rgba(203, 213, 225, 0.7);
  --sd-glow: rgba(45, 212, 191, 0.25);
}

[data-bs-theme="light"] {
  --bs-primary: #0d9488;
  --bs-primary-rgb: 13, 148, 136;
  --bs-link-color: #0f766e;
  --bs-link-hover-color: #115e59;
  --bs-body-bg: #f8fafc;
  --bs-body-color: #1e293b;
  --bs-border-color: rgba(100, 116, 139, 0.18);
  --bs-card-bg: #ffffff;
  --bs-card-border-color: rgba(100, 116, 139, 0.16);
  --sd-glass-bg: rgba(248, 250, 252, 0.82);
  --sd-glass-border: rgba(100, 116, 139, 0.14);
  --sd-muted: rgba(30, 41, 59, 0.62);
  --sd-glow: rgba(13, 148, 136, 0.18);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a {
  text-decoration: none;
}

section {
  scroll-margin-top: 76px;
}

/* -------- top bar -------- */
.glass-nav {
  backdrop-filter: saturate(150%) blur(10px);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  background-color: var(--sd-glass-bg);
  border-bottom: 1px solid var(--sd-glass-border);
}

.glass-nav .navbar-brand .brand-name {
  font-weight: 700;
}

.glass-nav .nav-link {
  color: var(--bs-body-color);
  margin: 0 0.15rem;
}

.glass-nav .nav-link:hover {
  color: var(--bs-primary);
}

.glass-nav .nav-link.active {
  color: var(--bs-primary) !important;
  font-weight: 600;
}

/* -------- theme toggle -------- */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--bs-border-color);
  color: var(--bs-body-color);
  background-color: transparent;
  transition: all 0.2s ease-in-out;
}

.theme-toggle:hover {
  color: var(--bs-primary);
  border-color: var(--bs-primary);
  transform: scale(1.06);
}

/* -------- compact header (distinct from company hero) -------- */
.page-head {
  border-bottom: 1px solid var(--bs-border-color);
  background:
    radial-gradient(640px 320px at 20% 0%, rgba(var(--sd-teal-rgb), 0.08), transparent 60%),
    var(--bs-body-bg);
}

.page-head .head-logo {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  box-shadow: 0 8px 28px var(--sd-glow);
}

.page-head h1 {
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-head .head-sub {
  color: var(--sd-muted);
}

/* -------- section cards -------- */
.card-product {
  border: 1px solid var(--bs-card-border-color);
  background-color: var(--bs-card-bg);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.card-product:hover {
  transform: translateY(-3px);
  border-color: rgba(var(--sd-teal-rgb), 0.4);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.12);
}

[data-bs-theme="dark"] .card-product:hover {
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.card-product .product-logo {
  width: 64px;
  height: 64px;
  object-fit: contain;
  border-radius: 14px;
}

.card-product .card-text {
  color: var(--sd-muted);
}

.section-title {
  font-weight: 700;
}

.section-title::after {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  margin: 0.6rem auto 0;
  border-radius: 2px;
  background: var(--sd-gradient);
}

/* -------- buttons -------- */
.btn-accent {
  color: #fff;
  background-image: var(--sd-gradient);
  border: none;
  transition: all 0.2s ease-in-out;
}

.btn-accent:hover,
.btn-accent:focus {
  color: #fff;
  filter: brightness(1.06);
  transform: translateY(-1px);
}

.btn-outline-secondary {
  color: var(--bs-body-color);
  border-color: var(--bs-border-color);
}

.btn-outline-secondary:hover {
  color: var(--bs-primary);
  border-color: var(--bs-primary);
  background-color: transparent;
}

.link-accent {
  color: var(--bs-link-color);
}

.link-accent:hover {
  color: var(--bs-link-hover-color);
  text-decoration: underline;
}

/* -------- footer -------- */
.site-footer {
  border-top: 1px solid var(--bs-border-color);
}

.footer-text {
  font-size: 0.8rem;
  color: var(--sd-muted);
}

.footer-text a {
  color: var(--bs-link-color);
}

.footer-text a:hover {
  color: var(--bs-link-hover-color);
}

/* subtle download link strip */
.download-strip {
  font-size: 0.9rem;
  color: var(--sd-muted);
}

.download-strip a {
  font-weight: 600;
}