/* Silvio Faria Jr, PhD — Professional Site */

:root {
  --bg: #0b0f19;
  --bg-card: #121826;
  --bg-elevated: #1a2234;
  --border: #2a3548;
  --text: #e8eef7;
  --text-muted: #94a3b8;
  --text-soft: #64748b;
  --accent: #38bdf8;
  --accent-2: #22d3ee;
  --success: #34d399;
  --radius: 12px;
  --max-width: 1100px;
  --font: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-2); }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent);
  font-weight: 500;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-cta {
  background: var(--accent);
  color: #0b0f19 !important;
  padding: 0.45rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
}

.nav-cta:hover {
  background: var(--accent-2);
  color: #0b0f19 !important;
}

/* Hero */
.hero {
  padding: 5rem 0 4rem;
  border-bottom: 1px solid var(--border);
}

.hero-badge {
  display: inline-block;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  max-width: 20ch;
  margin-bottom: 1.25rem;
}

.hero .subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 52ch;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.4rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #0b0f19;
}

.btn-primary:hover {
  background: var(--accent-2);
  color: #0b0f19;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Sections */
section {
  padding: 4.5rem 0;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

section h2 {
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

/* Value Prop */
.value-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .value-grid {
    grid-template-columns: 1.2fr 1fr;
  }
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.value-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.85rem;
  color: var(--text);
}

.value-card p,
.value-card li {
  color: var(--text-muted);
  font-size: 0.98rem;
}

.value-card ul {
  list-style: none;
  margin-top: 0.75rem;
}

.value-card li {
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.5rem;
}

.value-card li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* Impact Numbers */
.impact {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.impact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.impact-item {
  text-align: center;
  padding: 1.25rem 0.5rem;
}

.impact-number {
  font-size: clamp(1.6rem, 3.5vw, 2.1rem);
  font-weight: 800;
  color: var(--success);
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}

.impact-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Audience */
.audience-list {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

@media (min-width: 640px) {
  .audience-list {
    grid-template-columns: 1fr 1fr;
  }
}

.audience-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* CTA Block */
.cta-block {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  text-align: center;
  margin-top: 1rem;
}

.cta-block h2 {
  margin-bottom: 0.75rem;
}

.cta-block p {
  color: var(--text-muted);
  max-width: 48ch;
  margin: 0 auto 1.75rem;
}

.cta-contacts {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 1.5rem;
  font-size: 0.95rem;
}

.cta-contacts a {
  color: var(--text);
  font-weight: 500;
}

/* Curriculum */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 1.5rem;
}

.job {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
}

.job-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.job-title {
  font-weight: 700;
  font-size: 1.1rem;
}

.job-company {
  color: var(--accent);
  font-weight: 600;
}

.job-period {
  font-size: 0.85rem;
  color: var(--text-soft);
  white-space: nowrap;
}

.job ul {
  list-style: none;
  margin-top: 0.75rem;
}

.job li {
  position: relative;
  padding-left: 1.15rem;
  margin-bottom: 0.45rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.job li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* Skills */
.skills-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

@media (min-width: 640px) {
  .skills-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
}

.skill-group h3 {
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 0.6rem;
  font-weight: 600;
}

.skill-group p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

/* Education */
.edu-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}

.edu-item h3 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.edu-item .meta {
  font-size: 0.9rem;
  color: var(--text-soft);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  color: var(--text-soft);
  font-size: 0.85rem;
}

footer a {
  color: var(--text-muted);
}

/* Mobile */
@media (max-width: 640px) {
  .nav-links {
    gap: 1rem;
  }
  .nav-links a:not(.nav-cta) {
    display: none;
  }
}