/* SMS Gateway hub — amber / slate, square, low shadow */
:root {
  --slate-950: #020617;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --amber-950: #451a03;
  --amber-900: #78350f;
  --amber-800: #92400e;
  --amber-700: #b45309;
  --amber-600: #d97706;
  --amber-500: #f59e0b;
  --amber-400: #fbbf24;
  --amber-200: #fde68a;
  --amber-100: #fef3c7;
  --amber-50: #fffbeb;
  --white: #ffffff;
  --radius: 0;
  --shadow: none;
  --shadow-hover: none;
  --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --max: 1120px;
  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--slate-900);
  line-height: 1.6;
  background: linear-gradient(180deg, var(--amber-50) 0%, var(--slate-50) 32%, var(--slate-100) 100%);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

/* —— Layout —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: var(--slate-900);
  border-bottom: 1px solid var(--slate-800);
}

.site-header__inner,
.site-footer__inner,
.section-inner {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--white);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand__mark {
  width: 36px;
  height: 36px;
  border-radius: 0;
  background: linear-gradient(135deg, var(--amber-600), var(--amber-900));
  display: grid;
  place-items: center;
  color: var(--white);
  border: 1px solid rgba(251, 191, 36, 0.35);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__text span:first-child {
  font-size: 1rem;
}

.brand__text span:last-child {
  font-size: 0.72rem;
  font-weight: 500;
  color: #94a3b8;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 0;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.6rem 1rem;
  border: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--amber-700), var(--amber-900));
  color: var(--white);
}

.btn--primary:hover {
  background: linear-gradient(135deg, var(--amber-600), var(--amber-800));
}

.btn--ghost {
  color: #e2e8f0;
  border-color: rgba(148, 163, 184, 0.35);
  background: transparent;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(251, 191, 36, 0.45);
  color: var(--white);
}

.btn--solid {
  background: var(--white);
  color: var(--amber-900);
  border-color: var(--amber-200);
}

.btn--solid:hover {
  background: var(--amber-50);
}

/* —— Hero —— */
.hero {
  padding: 2.5rem 0 1.75rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--slate-900);
  max-width: 22ch;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--amber-800), var(--amber-950));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lead {
  margin: 0 0 1.25rem;
  max-width: 48ch;
  font-size: 1.05rem;
  color: var(--slate-600);
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  color: var(--slate-600);
  font-size: 0.9rem;
}

.hero__meta strong {
  color: var(--slate-900);
}

/* —— Sections —— */
.section {
  padding: 1rem 0 2.5rem;
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.section__head h2 {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--slate-900);
}

.section__head p {
  margin: 0.2rem 0 0;
  color: var(--slate-600);
  font-size: 0.95rem;
}

/* —— Link card grid —— */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.75rem;
}

.card-grid--feature {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.link-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1.25rem;
  border-radius: 0;
  background: var(--white);
  border: 1px solid var(--slate-200);
  box-shadow: none;
  transition: border-color 0.15s ease, background 0.15s ease;
  min-height: 160px;
  overflow: hidden;
}

.link-card::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--amber-700);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.link-card:hover {
  border-color: var(--amber-400);
  background: var(--amber-50);
}

.link-card:hover::after {
  transform: scaleX(1);
}

.link-card:focus-visible {
  outline: 2px solid var(--amber-600);
  outline-offset: 2px;
}

.link-card__icon {
  width: 56px;
  height: 56px;
  border-radius: 0;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--amber-800), var(--amber-950));
  color: var(--white);
  box-shadow: none;
  flex-shrink: 0;
}

.link-card__icon svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.link-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
}

.link-card__title {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--slate-900);
  letter-spacing: -0.015em;
}

.link-card:hover .link-card__title {
  color: var(--amber-800);
}

.link-card__desc {
  margin: 0;
  font-size: 0.88rem;
  color: var(--slate-600);
  line-height: 1.45;
}

.link-card__cta {
  margin-top: auto;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--amber-800);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.link-card__cta svg {
  width: 14px;
  height: 14px;
  transition: transform 0.15s ease;
}

.link-card:hover .link-card__cta svg {
  transform: translateX(3px);
}

.link-card--portal .link-card__icon {
  background: linear-gradient(145deg, var(--slate-800), var(--slate-950));
}

/* —— Panel —— */
.panel {
  margin-top: 0.5rem;
  padding: 1.5rem;
  border-radius: 0;
  background: linear-gradient(135deg, var(--amber-800), var(--amber-950));
  color: var(--white);
  box-shadow: none;
  border: 1px solid var(--amber-900);
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .panel {
    grid-template-columns: 1.4fr auto;
    align-items: center;
  }
}

.panel h2 {
  margin: 0 0 0.35rem;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.panel p {
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
  max-width: 48ch;
}

.panel a {
  color: var(--amber-200);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.panel a:hover {
  color: var(--white);
}

.panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* —— Footer —— */
.site-footer {
  margin-top: 1rem;
  padding: 2rem 0 2.5rem;
  background: var(--slate-950);
  color: #94a3b8;
  border-top: 1px solid var(--slate-800);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}

.site-footer a {
  color: #e2e8f0;
}

.site-footer a:hover {
  color: var(--amber-400);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.88rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 560px) {
  .brand__text span:last-child {
    display: none;
  }

  .link-card__icon {
    width: 48px;
    height: 48px;
  }

  .link-card__icon svg {
    width: 24px;
    height: 24px;
  }
}