/* ============================================================
   Brand layer
   Identity shared with the project sites:
   stracectl / stckcraw / certificate-validate
   ============================================================ */

:root,
body.light {
  --brand-surface: #ffffff;
  --brand-surface-soft: #f1f5fb;
  --brand-border: rgba(15, 23, 42, 0.1);
  --brand-border-strong: rgba(15, 23, 42, 0.2);
  --brand-text: #0f172a;
  --brand-muted: #5b6b82;
  --brand-teal: #0b8f7d;
  --brand-cyan: #0779a8;
  --brand-violet: #6d3fd1;
  --brand-grad: linear-gradient(120deg, #0b8f7d 0%, #0779a8 48%, #6d3fd1 100%);
  --brand-glow: rgba(7, 121, 168, 0.16);
  --brand-accent-glow: rgba(109, 63, 209, 0.1);
  --brand-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
}

body.dark {
  --brand-surface: #0e1522;
  --brand-surface-soft: #111a2b;
  --brand-border: rgba(148, 163, 184, 0.16);
  --brand-border-strong: rgba(148, 163, 184, 0.3);
  --brand-text: #e6edf3;
  --brand-muted: #93a4b8;
  --brand-teal: #6bffd6;
  --brand-cyan: #31c9ff;
  --brand-violet: #a78bfa;
  --brand-grad: linear-gradient(120deg, #6bffd6 0%, #31c9ff 48%, #a78bfa 100%);
  --brand-glow: rgba(49, 201, 255, 0.22);
  --brand-accent-glow: rgba(167, 139, 250, 0.16);
  --brand-shadow: 0 24px 60px rgba(2, 8, 23, 0.45);
}

/* ---------- Typography ---------- */

body,
.secondary-font,
#secondary-font,
.primary-font,
#primary-font,
.default-font,
#default-font {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif !important;
}

code,
pre,
kbd,
samp,
.brand-mono {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace !important;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  letter-spacing: -0.02em;
}

/* ---------- Animated backdrop ---------- */

#content {
  position: relative;
}

.brand-backdrop {
  height: 100vh;
  height: 100svh;
  left: 0;
  overflow: hidden;
  pointer-events: none;
  position: absolute;
  right: 0;
  top: 0;
  z-index: 0;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 62%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 0%, #000 62%, transparent 100%);
}

.brand-backdrop::before,
.brand-backdrop::after {
  border-radius: 50%;
  content: "";
  filter: blur(40px);
  opacity: 0.6;
  position: absolute;
  z-index: 0;
}

.brand-backdrop::before {
  animation: brand-drift-a 22s ease-in-out infinite;
  background: radial-gradient(circle, var(--brand-glow), transparent 70%);
  height: 55vmax;
  left: -15vmax;
  top: -30vmax;
  width: 55vmax;
}

.brand-backdrop::after {
  animation: brand-drift-b 26s ease-in-out infinite;
  background: radial-gradient(circle, var(--brand-accent-glow), transparent 70%);
  height: 45vmax;
  right: -20vmax;
  top: -20vmax;
  width: 45vmax;
}

.brand-backdrop canvas {
  display: block;
  height: 100%;
  inset: 0;
  position: absolute;
  width: 100%;
  z-index: 1;
}

@keyframes brand-drift-a {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(4%, 6%, 0) scale(1.12);
  }
}

@keyframes brand-drift-b {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1.05);
  }
  50% {
    transform: translate3d(-5%, 4%, 0) scale(0.95);
  }
}

/* ---------- Hero ---------- */

#hero {
  position: relative;
  isolation: isolate;
  z-index: 1;
}

#hero::before {
  content: "";
  position: absolute;
  inset: -15% -10% auto -10%;
  height: 75%;
  background:
    radial-gradient(50% 60% at 18% 8%, var(--brand-glow), transparent 70%),
    radial-gradient(45% 55% at 88% 16%, rgba(167, 139, 250, 0.16), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

body #hero h1 {
  color: var(--brand-text) !important;
  font-weight: 800;
  letter-spacing: -0.035em;
}

#hero .subtitle {
  color: var(--brand-teal);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  opacity: 0.95;
  text-transform: uppercase;
}

#hero .hero-content {
  color: var(--brand-muted);
}

#hero .image img {
  border: 1px solid var(--brand-border) !important;
  border-radius: 1.25rem !important;
  box-shadow: var(--brand-shadow) !important;
}

/* ---------- Global accents ---------- */

.navbar-brand {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.navbar-brand::before {
  background: var(--brand-grad);
  border-radius: 50%;
  content: "";
  display: inline-block;
  height: 0.55rem;
  margin-right: 0.55rem;
  vertical-align: middle;
  width: 0.55rem;
}

.navbar .nav-link {
  font-weight: 500;
}

.btn {
  border-radius: 999px;
  font-weight: 600;
}

.gradient-text {
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

#about .container h3,
#experience .container h3,
#education .container h3,
#achievements .container h3,
#contact .container h3 {
  color: var(--brand-text) !important;
  font-weight: 700;
  letter-spacing: -0.03em;
}

/* ---------- Projects ---------- */

.brand-projects {
  padding-top: 2rem;
}

.brand-projects .section-head {
  margin: 0 auto 2.75rem;
  max-width: 780px;
  text-align: center;
}

.brand-projects .section-eyebrow {
  color: var(--brand-teal);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

#projects .section-head .section-title {
  color: var(--brand-text) !important;
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 800;
  margin: 0.6rem 0;
}

.brand-projects .section-sub {
  color: var(--brand-muted);
  margin: 0;
}

.project-card {
  background: var(--brand-surface);
  border: 1px solid var(--brand-border);
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.project-card:hover {
  border-color: var(--brand-border-strong);
  box-shadow: var(--brand-shadow);
  transform: translateY(-5px);
}

.project-frame {
  background: var(--brand-surface-soft);
  border-bottom: 1px solid var(--brand-border);
  display: block;
  overflow: hidden;
  text-decoration: none;
}

.project-chrome {
  align-items: center;
  display: flex;
  gap: 0.4rem;
  padding: 0.6rem 0.85rem;
}

.project-chrome .dot {
  border-radius: 50%;
  display: inline-block;
  height: 0.55rem;
  width: 0.55rem;
}

.project-chrome .dot-red {
  background: #ff5f57;
}

.project-chrome .dot-yellow {
  background: #febc2e;
}

.project-chrome .dot-green {
  background: #28c840;
}

.project-chrome-title {
  color: var(--brand-muted);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  margin-left: 0.35rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.project-frame img {
  display: block;
  height: 160px;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.5s ease;
  width: 100%;
}

.project-card:hover .project-frame img {
  transform: scale(1.03);
}

.project-body {
  flex: 1;
  padding: 1.15rem 1.25rem 0;
}

.project-kicker {
  color: var(--brand-teal);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.project-name {
  color: var(--brand-text);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0.35rem 0 0.5rem;
}

.project-tagline {
  color: var(--brand-muted);
  font-size: 0.92rem;
  line-height: 1.55;
  margin: 0 0 0.9rem;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.project-stack li {
  background: var(--brand-surface-soft);
  border: 1px solid var(--brand-border);
  border-radius: 999px;
  color: var(--brand-muted);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  line-height: 1.2;
  padding: 0.25rem 0.55rem;
}

.project-footer {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  padding: 1rem 1.25rem 1.2rem;
}

#projects .project-link {
  color: var(--brand-teal) !important;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
}

#projects .project-link.is-muted {
  color: var(--brand-muted) !important;
  position: relative;
  z-index: 2;
}

#projects .project-link:hover {
  color: var(--brand-cyan) !important;
}

/* ---------- Back to top ---------- */

.back-to-top {
  align-items: center;
  background: var(--brand-surface);
  border: 1px solid var(--brand-border-strong);
  border-radius: 50%;
  bottom: clamp(1rem, 3vw, 2rem);
  box-shadow: var(--brand-shadow);
  color: var(--brand-teal);
  cursor: pointer;
  display: flex;
  height: 44px;
  justify-content: center;
  opacity: 0;
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s, border-color 0.25s ease, color 0.25s ease;
  visibility: hidden;
  width: 44px;
  z-index: 1050;
}

.back-to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}

.back-to-top:hover {
  border-color: var(--brand-teal);
  color: var(--brand-cyan);
  transform: translateY(-2px);
}

.back-to-top:focus-visible {
  outline: 2px solid var(--brand-cyan);
  outline-offset: 3px;
}

.back-to-top svg {
  height: 20px;
  width: 20px;
}

@media (prefers-reduced-motion: reduce) {
  .brand-backdrop::before,
  .brand-backdrop::after {
    animation: none;
  }

  .back-to-top {
    transition: opacity 0.15s linear, visibility 0.15s;
  }

  .project-card,
  .project-frame img {
    transition: none;
  }
}