/* ============================================================
   KIMBERLEY WALTON — PROJECT MANAGER PORTFOLIO
   Base styles, layout, and component styles
   ============================================================ */

/* ---- Reset & variables ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:      #0a1628;
  --navy-mid:  #122040;
  --accent:    #3b82f6;
  --accent-dk: #2563eb;
  --accent-lt: #93c5fd;
  --teal:      #0ea5e9;
  --white:     #ffffff;
  --off-white: #f8fafc;
  --gray-100:  #f1f5f9;
  --gray-200:  #e2e8f0;
  --gray-400:  #94a3b8;
  --gray-600:  #475569;
  --gray-800:  #1e293b;
  --text:      #1e293b;
  --text-muted:#64748b;

  --radius-sm: 6px;
  --radius:    12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow:    0 4px 16px rgba(0,0,0,.10);
  --shadow-lg: 0 10px 40px rgba(0,0,0,.16);

  --transition: 0.25s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Utilities ---- */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  background: rgba(59,130,246,.1);
  color: var(--accent);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--navy);
  line-height: 1.2;
  max-width: 600px;
  margin: 0 auto;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dk);
  border-color: var(--accent-dk);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(59,130,246,.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,.5);
}
.btn-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: var(--white);
}

.btn-full { width: 100%; }

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
}

.navbar.scrolled {
  background: rgba(10,22,40,.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 10px 0;
  box-shadow: 0 2px 20px rgba(0,0,0,.3);
}

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

.nav-logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--white);
  text-decoration: none;
  letter-spacing: .05em;
  background: var(--accent);
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: rgba(255,255,255,.85);
  text-decoration: none;
  font-size: .9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--white); }

.nav-links .btn-primary {
  padding: 8px 20px;
  font-size: .85rem;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--navy);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(59,130,246,.25) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 110% 80%, rgba(14,165,233,.15) 0%, transparent 60%);
}

/* Subtle grid overlay */
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 100px;
  padding-bottom: 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16,185,129,.15);
  border: 1px solid rgba(16,185,129,.3);
  color: #6ee7b7;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .05em;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.hero-badge::before {
  content: '';
  width: 8px; height: 8px;
  background: #10b981;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .6; transform: scale(.8); }
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -.02em;
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 400;
  color: var(--accent-lt);
  margin-bottom: 24px;
}

.hero-desc {
  max-width: 580px;
  color: rgba(255,255,255,.7);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,.1);
}

.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: .8rem;
  color: rgba(255,255,255,.5);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 500;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-section { background: var(--off-white); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 60px;
  align-items: center;
}

.about-text p {
  color: var(--gray-600);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 28px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: .95rem;
  color: var(--gray-800);
  font-weight: 500;
}

.highlight-icon {
  color: var(--accent);
  font-size: .7rem;
}

.about-image-wrap {
  position: relative;
}

.about-image-placeholder {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--navy-mid), var(--navy));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
}

.initials {
  font-size: 5rem;
  font-weight: 800;
  color: rgba(255,255,255,.15);
  letter-spacing: .05em;
}

.about-tag-card {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--white);
  padding: 14px 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.about-tag-card strong {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  font-weight: 700;
}

.about-tag-card span {
  font-size: .95rem;
  font-weight: 600;
  color: var(--navy);
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills-section { background: var(--white); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.skill-card {
  padding: 28px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--white);
  transition: all var(--transition);
}

.skill-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.skill-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.skill-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.skill-card p {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skill-tags span {
  font-size: .72rem;
  font-weight: 600;
  background: var(--gray-100);
  color: var(--gray-600);
  padding: 3px 10px;
  border-radius: 100px;
  letter-spacing: .03em;
}

/* ============================================================
   CERTIFICATIONS
   ============================================================ */
.certs-section { background: var(--navy); }

.certs-section .section-tag {
  background: rgba(147,197,253,.1);
  color: var(--accent-lt);
}

.certs-section .section-header h2 {
  color: var(--white);
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.cert-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.cert-card:hover {
  background: rgba(255,255,255,.08);
  border-color: rgba(59,130,246,.4);
}

.cert-card.featured {
  border-color: rgba(59,130,246,.4);
  background: rgba(59,130,246,.08);
}

.cert-badge {
  min-width: 60px; height: 60px;
  background: var(--accent);
  color: var(--white);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  font-weight: 800;
  letter-spacing: .02em;
}

.cert-card.featured .cert-badge {
  background: linear-gradient(135deg, var(--accent), var(--teal));
}

.cert-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.cert-info h3 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--white);
}

.cert-body {
  font-size: .8rem;
  color: var(--accent-lt);
  font-weight: 500;
}

.cert-year {
  font-size: .75rem;
  color: rgba(255,255,255,.4);
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-section { background: var(--off-white); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
  gap: 28px;
}

.project-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}

.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--accent);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.project-industry {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--accent);
  background: rgba(59,130,246,.08);
  padding: 4px 12px;
  border-radius: 100px;
}

.project-value {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--navy);
}

.project-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
  line-height: 1.3;
}

.project-card p {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--gray-100);
}

.meta-tag {
  font-size: .75rem;
  font-weight: 600;
  background: var(--gray-100);
  color: var(--gray-600);
  padding: 4px 12px;
  border-radius: 100px;
}

.project-outcomes {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.outcome {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .88rem;
  color: var(--gray-800);
  font-weight: 500;
}

.outcome-tick {
  color: #10b981;
  font-size: 1rem;
  font-weight: 800;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-section { background: var(--white); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-intro p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: .95rem;
  color: var(--gray-800);
  font-weight: 500;
}

.contact-icon {
  font-size: 1.2rem;
  width: 24px;
  text-align: center;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: .85rem;
  font-weight: 700;
  color: var(--navy);
  text-decoration: none;
  transition: all var(--transition);
}

.social-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(59,130,246,.05);
}

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--gray-800);
  letter-spacing: .02em;
}

.form-group input,
.form-group textarea {
  padding: 12px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-family: inherit;
  color: var(--text);
  background: var(--white);
  transition: border-color var(--transition);
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,.1);
}

.form-group input:invalid:not(:placeholder-shown),
.form-group textarea:invalid:not(:placeholder-shown) {
  border-color: #ef4444;
}

.form-note {
  font-size: .85rem;
  color: var(--text-muted);
  text-align: center;
  min-height: 1.2em;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--navy);
  padding: 36px 0;
  text-align: center;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--white);
  background: var(--accent);
  width: 36px; height: 36px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
}

.footer p {
  color: rgba(255,255,255,.4);
  font-size: .85rem;
}

.footer-note {
  font-size: .75rem !important;
  opacity: .5;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-image-wrap { display: none; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }

  .nav-links {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--navy);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 36px;
    z-index: 999;
  }

  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.2rem; }

  .hamburger { display: flex; z-index: 1001; }
  .hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hamburger.open span:nth-child(2) { opacity: 0; }
  .hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero-stats { gap: 28px; }
  .skills-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; text-align: center; }
}