/* ============================================
   Kenneth Denzel E. Villas - Portfolio Redesign
   Modern, professional layout for online sharing
   ============================================ */

:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-primary: #0d9488;
  --color-primary-hover: #0f766e;
  --color-dark: #0f172a;
  --color-dark-soft: #1e293b;
  --color-text: #334155;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-accent-light: #ccfbf1;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.06);
  --radius: 1rem;
  --radius-lg: 1.5rem;
  --font-heading: "Plus Jakarta Sans", "Montserrat", sans-serif;
  --font-body: "Plus Jakarta Sans", "Lato", sans-serif;
}

/* Base */
body {
  background: var(--color-bg) !important;
  font-family: var(--font-body) !important;
  color: var(--color-text) !important;
  line-height: 1.65;
}

/* Hero / Profile Banner */
.profile-banner {
  background: linear-gradient(160deg, var(--color-dark) 0%, var(--color-dark-soft) 50%, #0d9488 100%);
  box-shadow: var(--shadow-lg);
  text-align: center;
  padding: 4.5rem 1.5rem 4rem;
  color: #fff;
  margin-bottom: 0;
  position: relative;
  overflow: hidden;
}

.profile-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.6;
  pointer-events: none;
}

.profile-banner img {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  margin-bottom: 1.5rem;
  border: 4px solid rgba(255, 255, 255, 0.2);
  position: relative;
  z-index: 1;
}

.profile-banner h1 {
  font-family: var(--font-heading) !important;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 1;
}

.profile-banner .lead {
  font-size: 1.15rem;
  font-weight: 500;
  opacity: 0.95;
  letter-spacing: 0.02em;
  position: relative;
  z-index: 1;
}

/* Navbar */
#mainNav {
  background: var(--color-dark) !important;
  box-shadow: var(--shadow-md);
  padding: 0.5rem 0;
}

#mainNav .navbar-brand {
  font-family: var(--font-heading) !important;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

#mainNav .nav-link {
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: var(--radius);
  padding: 0.5rem 0.85rem !important;
  transition: background 0.2s, color 0.2s;
}

#mainNav .nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff !important;
}

#mainNav .dropdown-menu {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 0.35rem;
}

#mainNav .dropdown-item {
  border-radius: 0.5rem;
  padding: 0.5rem 0.85rem;
}

.navbar-toggler {
  border-color: rgba(255,255,255,0.3) !important;
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 2px rgba(13, 148, 136, 0.5) !important;
}

/* Page wrapper */
body > .profile-banner + .section-card,
body > .section-card,
body > nav + .section-card {
  margin-left: auto;
  margin-right: auto;
  max-width: 900px;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Section cards */
.section-card {
  background: var(--color-surface) !important;
  border-radius: var(--radius-lg) !important;
  box-shadow: var(--shadow-sm) !important;
  border: 1px solid var(--color-border) !important;
  padding: 2.5rem 2rem !important;
  margin-bottom: 2rem !important;
  max-width: 900px !important;
  margin-left: auto !important;
  margin-right: auto !important;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.section-card:hover {
  box-shadow: var(--shadow-md) !important;
  border-color: #cbd5e1 !important;
}

.section-divider {
  display: flex;
  align-items: center;
  margin: 2rem 0 1.5rem 0;
}

.section-divider .divider-line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  border-radius: 2px;
  opacity: 0.5;
}

.section-divider .divider-icon {
  margin: 0 1rem;
  color: var(--color-primary);
  font-size: 1.5rem;
}

.section-title {
  font-family: var(--font-heading) !important;
  font-size: 1.75rem !important;
  font-weight: 700 !important;
  letter-spacing: -0.02em !important;
  color: var(--color-dark) !important;
  margin-bottom: 0.5rem !important;
}

.subsection-title {
  font-size: 1.2rem !important;
  font-weight: 600 !important;
  color: var(--color-primary) !important;
  margin-top: 1.75rem !important;
  margin-bottom: 0.5rem !important;
}

.subsubsection-title {
  font-size: 1.05rem !important;
  font-weight: 600 !important;
  color: var(--color-dark-soft) !important;
  margin-top: 1rem !important;
  margin-bottom: 0.35rem !important;
}

/* About block */
.about-card {
  margin-top: 2rem;
}

.about-text {
  font-size: 1.1rem;
  color: var(--color-text);
  max-width: 42rem;
  margin: 0 auto;
  line-height: 1.75;
}

/* CV content box */
.cv-content {
  background: var(--color-bg) !important;
  border-radius: var(--radius-lg) !important;
  border: 1px solid var(--color-border) !important;
  padding: 2rem !important;
  max-width: 700px !important;
  margin: auto !important;
  box-shadow: none !important;
}

.cv-content h2 {
  color: var(--color-dark) !important;
}

.cv-content div[style*="color:#1abc9c"] {
  color: var(--color-primary) !important;
}

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
}

.gallery-grid img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform 0.2s, box-shadow 0.2s;
}

.gallery-grid img:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.gallery-caption {
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
  font-weight: 500;
}

/* Skills list */
.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding-left: 0;
  margin-bottom: 0;
}

.skills-list li {
  background: var(--color-bg) !important;
  border-radius: var(--radius) !important;
  border: 1px solid var(--color-border) !important;
  padding: 0.65rem 1.25rem !important;
  font-size: 1rem !important;
  font-weight: 600 !important;
  color: var(--color-dark-soft) !important;
  display: flex;
  align-items: center;
  margin-bottom: 0 !important;
  transition: all 0.2s;
  box-shadow: none !important;
}

.skills-list li:hover {
  background: var(--color-accent-light) !important;
  border-color: var(--color-primary) !important;
  color: var(--color-primary) !important;
}

.skills-list i {
  margin-right: 0.6rem;
  font-size: 1.4em;
}

/* Buttons */
.btn-primary,
.download-cv-btn {
  background: var(--color-primary) !important;
  border: none !important;
  color: #fff !important;
  padding: 0.7rem 1.75rem !important;
  border-radius: 9999px !important;
  font-weight: 600 !important;
  font-size: 1rem !important;
  box-shadow: var(--shadow-sm) !important;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s !important;
}

.btn-primary:hover,
.download-cv-btn:hover {
  background: var(--color-primary-hover) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md) !important;
  color: #fff !important;
}

/* Contact section cards */
#contact .row > [class*="col-"] > div {
  background: var(--color-bg) !important;
  border: 1px solid var(--color-border) !important;
  border-radius: var(--radius-lg) !important;
  padding: 2rem 1.5rem !important;
  height: 100% !important;
  box-shadow: none !important;
  transition: border-color 0.2s, background 0.2s;
}

#contact .row > [class*="col-"] > div:hover {
  border-color: var(--color-primary) !important;
  background: var(--color-accent-light) !important;
}

#contact [style*="color:#1abc9c"] {
  color: var(--color-primary) !important;
}

#contact h4 {
  color: var(--color-dark) !important;
}

#contact a:hover {
  color: var(--color-primary-hover) !important;
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--color-primary) !important;
  color: #fff !important;
  border: none !important;
  border-radius: 50% !important;
  width: 52px !important;
  height: 52px !important;
  font-size: 1.25rem !important;
  box-shadow: var(--shadow-md) !important;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  cursor: pointer;
  opacity: 0.9;
  transition: background 0.2s, opacity 0.2s, transform 0.2s;
}

.back-to-top:hover {
  background: var(--color-primary-hover) !important;
  opacity: 1;
  transform: translateY(-2px);
}

/* Capstone / Machine problem images */
.capstone-mobile-img {
  max-width: 200px;
  width: 100%;
  height: auto;
  display: block;
  margin-left: auto;
  margin-right: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.machine-4thyr-img {
  max-width: 500px;
  width: 100%;
  height: auto;
  display: block;
  margin-left: auto;
  margin-right: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

/* Certificate modal */
#certModal {
  background: rgba(15, 23, 42, 0.85) !important;
  backdrop-filter: blur(4px);
}

#certModal img {
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

#certModal button {
  background: var(--color-primary) !important;
  border: none !important;
  color: #fff !important;
  transition: background 0.2s;
}

#certModal button:hover {
  background: var(--color-primary-hover) !important;
}

/* Responsive */
@media (max-width: 768px) {
  .profile-banner {
    padding: 3rem 1rem 2.5rem;
  }
  .profile-banner img {
    width: 140px;
    height: 140px;
  }
  .section-card {
    padding: 1.5rem 1.25rem !important;
  }
  .section-title {
    font-size: 1.4rem !important;
  }
}

@media (max-width: 576px) {
  .profile-banner img {
    width: 120px;
    height: 120px;
  }
  .profile-banner h1 {
    font-size: 1.5rem;
  }
  .profile-banner .lead {
    font-size: 1rem;
  }
}