:root {
  --font-stack: system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  --color-bg: #f7f7f8;
  --color-surface: #ffffff;
  --color-text: #101114;
  --color-muted: #5b5e6a;
  --color-border: #e5e7eb;
  --color-primary: #0ea5e9;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(16, 17, 20, 0.06);
  --shadow-md: 0 6px 20px rgba(16, 17, 20, 0.08);
  --max-width: 640px;
  --gap: 14px;
  --btn-height: 56px;
  --logo-size: 88px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0b0c0f;
    --color-surface: #111318;
    --color-text: #e7e8ec;
    --color-muted: #a3a6b5;
    --color-border: #242834;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.35);
  }
}

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-stack);
  color: var(--color-text);
  background:
    radial-gradient(1200px 800px at 10% 10%, rgba(14, 165, 233, 0.10), transparent 60%),
    radial-gradient(1000px 700px at 90% 20%, rgba(99, 102, 241, 0.10), transparent 60%),
    var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.hub {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 32px 20px;
}

.header,
.links,
.footer {
  width: 100%;
  max-width: var(--max-width);
}

.header {
  text-align: center;
  margin-bottom: 18px;
  animation: fadeInDown 0.6s ease both;
}

.brand-logo {
  width: var(--logo-size);
  height: var(--logo-size);
  border-radius: 20%;
  display: block;
  margin: 0 auto 10px auto;
  box-shadow: var(--shadow-sm);
  background: var(--color-surface);
}

.title {
  margin: 0 0 8px 0;
  font-size: clamp(1.6rem, 2.2vw + 1rem, 2.2rem);
  letter-spacing: 0.2px;
}

.subtitle {
  margin: 0;
  color: var(--color-muted);
  font-size: clamp(0.95rem, 0.3vw + 0.9rem, 1.05rem);
  line-height: 1.5;
}

.links {
  display: grid;
  gap: var(--gap);
  margin: 22px auto 18px;
  animation: fadeInUp 0.8s ease both;
}

.link-btn {
  --brand: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  height: var(--btn-height);
  padding: 0 18px;
  border-radius: var(--radius);
  text-decoration: none;
  background: linear-gradient(180deg, var(--color-surface), color-mix(in oklab, var(--color-surface) 92%, black));
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform 180ms ease, box-shadow 200ms ease, border-color 200ms ease, background-color 200ms ease;
  will-change: transform, box-shadow;
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: 0.2px;
}

.link-btn i {
  font-size: 1.25rem;
  width: 1.25rem;
  display: inline-flex;
  justify-content: center;
  color: var(--brand);
}

.link-btn {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  justify-content: center;
}

.link-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in oklab, var(--brand) 45%, var(--color-border));
}

.link-btn:active {
  transform: translateY(0);
}

.link-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--brand) 28%, transparent), var(--shadow-md);
  border-color: var(--brand);
}

@media (prefers-reduced-motion: reduce) {
  .link-btn {
    transition: none;
  }
}

/* Brand colors */
.link-btn[data-brand="x"] { --brand: #000000; }
.link-btn[data-brand="github"] { --brand: #24292F; }
.link-btn[data-brand="linkedin"] { --brand: #0A66C2; }
.link-btn[data-brand="facebook"] { --brand: #1877F2; }
.link-btn[data-brand="instagram"] { --brand: #E1306C; }
.link-btn[data-brand="threads"] { --brand: #000000; }
.link-btn[data-brand="tiktok"] { --brand: #EE1D52; }
.link-btn[data-brand="youtube"] { --brand: #FF0000; }
.link-btn[data-brand="reddit"] { --brand: #FF4500; }
.link-btn[data-brand="gravatar"] { --brand: #1E8CBE; } /* Gravatar */
.link-btn[data-brand="pinterest"] { --brand: #E60023; }
.link-btn[data-brand="quora"] { --brand: #B92B27; }

/* Footer */
.footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-muted);
  text-align: center;
  animation: fadeIn 1s ease both;
}

.footer a {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.25s ease;
}

.footer a:hover {
  color: var(--color-primary);
}

/* Integrare SelfSign */
#dddev-selfsign p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* Integrare Signature */
.dddev-signature-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.dddev-signature-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  text-decoration: none;
  color: inherit;
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.dddev-signature-link:hover {
  border-bottom-color: currentColor;
  color: var(--color-primary);
}

.dddev-signature-logo {
  height: 1em;
  width: auto;
  vertical-align: middle;
}

@media (min-width: 720px) {
  .links { gap: calc(var(--gap) + 2px); }
  .title { letter-spacing: 0.25px; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-15px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}