:root {
  --primary-color: #2563EB;
  --dark-color: #1E293B;
  --accent-color: #38BDF8;
  --light-color: #F8FAFC;
  --white-color: #FFFFFF;
  --text-muted: #64748B;
  --navbar-height: 76px;
  --surface-color: rgba(255, 255, 255, 0.86);
  --surface-solid: #FFFFFF;
  --border-color: rgba(148, 163, 184, 0.22);
  --shadow-soft: 0 24px 60px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 30px 74px rgba(37, 99, 235, 0.15);
  --contact-card-bg: #1E293B;
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}

body.dark-mode {
  --dark-color: #F8FAFC;
  --light-color: #0F172A;
  --surface-color: rgba(15, 23, 42, 0.76);
  --surface-solid: #111827;
  --text-muted: #CBD5E1;
  --border-color: rgba(148, 163, 184, 0.2);
  --shadow-soft: 0 24px 60px rgba(0, 0, 0, 0.28);
  --shadow-hover: 0 30px 76px rgba(56, 189, 248, 0.16);
  --contact-card-bg: #020617;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--navbar-height);
  scrollbar-color: var(--primary-color) var(--light-color);
  scrollbar-width: thin;
}

html::-webkit-scrollbar {
  width: 12px;
}

html::-webkit-scrollbar-track {
  background-color: var(--light-color);
}

html::-webkit-scrollbar-thumb {
  border: 3px solid var(--light-color);
  border-radius: 999px;
  background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
}

body {
  margin: 0;
  font-family: "Poppins", sans-serif;
  color: var(--dark-color);
  background-color: var(--light-color);
  opacity: 0;
  transition: opacity 0.45s ease, background-color var(--transition-smooth), color var(--transition-smooth);
}

body.page-loaded {
  opacity: 1;
}

a {
  text-decoration: none;
}

section,
.portfolio-navbar,
.footer,
.about-card,
.about-feature,
.stat-card,
.timeline-card,
.project-card,
.training-card,
.skill-card,
.contact-form,
.contact-info-card {
  transition:
    background-color var(--transition-smooth),
    border-color var(--transition-smooth),
    box-shadow var(--transition-smooth),
    color var(--transition-smooth),
    transform var(--transition-fast);
}

.loading-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 50% 38%, rgba(56, 189, 248, 0.22), transparent 28%),
    linear-gradient(135deg, var(--light-color), var(--surface-solid));
  transition: opacity 0.45s ease, visibility 0.45s ease;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.modern-loader {
  position: relative;
  display: inline-grid;
  width: 78px;
  height: 78px;
  place-items: center;
}

.modern-loader::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 3px solid rgba(37, 99, 235, 0.14);
  border-top-color: var(--primary-color);
  border-right-color: var(--accent-color);
  border-radius: 50%;
  animation: loaderSpin 0.9s linear infinite;
}

.modern-loader span {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--primary-color);
  box-shadow: 0 0 24px rgba(37, 99, 235, 0.45);
  animation: loaderPulse 1.1s ease-in-out infinite;
}

.modern-loader span:nth-child(2) {
  background-color: var(--accent-color);
  animation-delay: 0.16s;
}

.modern-loader span:nth-child(3) {
  animation-delay: 0.32s;
}

.loading-text {
  font-weight: 500;
  color: var(--dark-color);
}

@keyframes loaderSpin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes loaderPulse {
  0%,
  100% {
    opacity: 0.45;
    transform: scale(0.75);
  }

  50% {
    opacity: 1;
    transform: scale(1.14);
  }
}

.portfolio-navbar {
  min-height: var(--navbar-height);
  background-color: rgba(248, 250, 252, 0.72);
  box-shadow: none;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.portfolio-navbar.navbar-scrolled {
  background-color: rgba(248, 250, 252, 0.86);
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.1);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
}

.navbar-brand {
  color: var(--dark-color);
  letter-spacing: 0;
}

.nav-controls {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--dark-color);
  background-color: var(--surface-color);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: rgba(37, 99, 235, 0.34);
  color: var(--primary-color);
  transform: translateY(-2px);
}

.navbar-toggler {
  border-color: var(--border-color);
  border-radius: 8px;
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.brand-mark {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  margin-right: 8px;
  border-radius: 8px;
  color: var(--white-color);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

.navbar-nav .nav-link {
  position: relative;
  margin-left: 6px;
  padding: 10px 12px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--dark-color);
  transition: color 0.2s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: var(--primary-color);
}

.navbar-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 5px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--primary-color);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
  transform: scaleX(1);
}

.navbar-nav .nav-contact {
  margin-left: 12px;
  padding-inline: 18px;
  color: var(--white-color);
  background-color: var(--primary-color);
  border-radius: 8px;
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.22);
}

.navbar-nav .nav-contact:hover,
.navbar-nav .nav-contact.active {
  color: var(--white-color);
  background-color: #1D4ED8;
}

.navbar-nav .nav-contact::after {
  display: none;
}

.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 132px 0 88px;
  background:
    radial-gradient(circle at 12% 20%, rgba(56, 189, 248, 0.28), transparent 32%),
    radial-gradient(circle at 88% 18%, rgba(37, 99, 235, 0.22), transparent 34%),
    linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 46%, #E0F2FE 100%);
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: auto -10% -36% 46%;
  height: 420px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.12);
  filter: blur(24px);
}

.hero-section .container {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 9px 14px;
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: 999px;
  color: var(--primary-color);
  background-color: rgba(255, 255, 255, 0.72);
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.1);
  font-size: 0.92rem;
  font-weight: 600;
}

.hero-title {
  max-width: 680px;
  margin-bottom: 14px;
  color: var(--dark-color);
  font-size: clamp(2.25rem, 6vw, 4.75rem);
  font-weight: 700;
  line-height: 1.08;
}

.hero-profession {
  min-height: 42px;
  margin-bottom: 20px;
  color: var(--primary-color);
  font-size: clamp(1.2rem, 3vw, 1.75rem);
  font-weight: 600;
}

.typing-cursor {
  display: inline-block;
  margin-left: 3px;
  color: var(--accent-color);
  animation: cursorBlink 0.75s infinite;
}

.hero-description {
  max-width: 660px;
  margin-bottom: 32px;
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.8;
}

.hero-actions .btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.btn-primary-custom {
  border: 1px solid var(--primary-color);
  color: var(--white-color);
  background-color: var(--primary-color);
  box-shadow: 0 16px 32px rgba(37, 99, 235, 0.25);
}

.btn-primary-custom:hover {
  color: var(--white-color);
  background-color: #1D4ED8;
  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.32);
  transform: translateY(-3px);
}

.btn-outline-custom {
  border: 1px solid rgba(30, 41, 59, 0.18);
  color: var(--dark-color);
  background-color: rgba(255, 255, 255, 0.72);
}

.btn-outline-custom:hover {
  border-color: var(--accent-color);
  color: var(--primary-color);
  background-color: var(--white-color);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.09);
  transform: translateY(-3px);
}

.hero-visual {
  position: relative;
  display: flex;
  min-height: 500px;
  align-items: center;
  justify-content: center;
}

.profile-glow {
  position: absolute;
  width: min(72vw, 440px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(56, 189, 248, 0.55) 0%, rgba(37, 99, 235, 0.26) 45%, transparent 70%);
  filter: blur(10px);
  animation: glowPulse 4s ease-in-out infinite;
}

.profile-frame {
  position: relative;
  display: flex;
  width: min(78vw, 390px);
  aspect-ratio: 1;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  padding: 12px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.9), rgba(56, 189, 248, 0.92));
  box-shadow: 0 30px 70px rgba(37, 99, 235, 0.28);
  overflow: hidden;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.profile-frame::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 10px solid rgba(255, 255, 255, 0.76);
  border-radius: 50%;
  pointer-events: none;
}

.profile-frame:hover {
  box-shadow: 0 36px 84px rgba(37, 99, 235, 0.34);
  transform: translateY(-6px);
}

.profile-photo {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  filter: saturate(1.04) contrast(1.03);
  transition: transform var(--transition-smooth), filter var(--transition-smooth);
}

.profile-frame:hover .profile-photo {
  filter: saturate(1.1) contrast(1.05);
  transform: scale(1.04);
}

.hero-floating-card {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 8px;
  color: var(--dark-color);
  background-color: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.14);
  backdrop-filter: blur(12px);
  font-size: 0.92rem;
  font-weight: 600;
}

.hero-floating-card i {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--white-color);
  background-color: var(--primary-color);
}

.hero-card-top {
  top: 78px;
  left: 24px;
}

.hero-card-bottom {
  right: 18px;
  bottom: 84px;
}

@keyframes cursorBlink {
  0%,
  45% {
    opacity: 1;
  }

  46%,
  100% {
    opacity: 0;
  }
}

@keyframes glowPulse {
  0%,
  100% {
    transform: scale(0.96);
    opacity: 0.72;
  }

  50% {
    transform: scale(1.04);
    opacity: 1;
  }
}

.about-section {
  padding: 110px 0;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 8px 14px;
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: 999px;
  color: var(--primary-color);
  background-color: var(--white-color);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.08);
  font-size: 0.9rem;
  font-weight: 600;
}

.section-title {
  margin-bottom: 18px;
  color: var(--dark-color);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  line-height: 1.16;
}

.section-description {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.85;
}

.about-card {
  padding: 30px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.86);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
}

.about-feature {
  display: flex;
  height: 100%;
  gap: 16px;
  padding: 20px;
  border-radius: 8px;
  background-color: var(--light-color);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.about-feature:hover {
  box-shadow: 0 16px 34px rgba(15, 23, 42, 0.08);
  transform: translateY(-4px);
}

.about-feature > i {
  display: inline-flex;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--white-color);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  font-size: 1.25rem;
}

.about-feature h3 {
  margin-bottom: 7px;
  color: var(--dark-color);
  font-size: 1.02rem;
  font-weight: 700;
}

.about-feature p {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.about-stats {
  margin-top: 42px;
}

.stat-card {
  height: 100%;
  padding: 26px 20px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 8px;
  text-align: center;
  background-color: var(--white-color);
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.07);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
  box-shadow: 0 24px 54px rgba(37, 99, 235, 0.13);
  transform: translateY(-5px);
}

.stat-icon {
  display: inline-flex;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  border-radius: 8px;
  color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.1);
  font-size: 1.35rem;
}

.stat-card h3 {
  margin-bottom: 6px;
  color: var(--dark-color);
  font-size: clamp(1.55rem, 4vw, 2.25rem);
  font-weight: 700;
}

.stat-card p {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 0.93rem;
  font-weight: 500;
}

.timeline-section {
  padding: 110px 0;
  background-color: var(--white-color);
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 52px;
}

.section-heading .section-description {
  max-width: 680px;
}

.timeline-wrapper {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
}

.timeline-wrapper::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 31px;
  width: 2px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  align-items: start;
}

.timeline-marker {
  position: relative;
  z-index: 1;
  display: inline-flex;
  width: 64px;
  height: 64px;
  align-items: center;
  justify-content: center;
  border: 8px solid var(--white-color);
  border-radius: 50%;
  color: var(--white-color);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  box-shadow: 0 16px 32px rgba(37, 99, 235, 0.25);
  font-size: 1.35rem;
}

.section-muted .timeline-marker {
  border-color: var(--light-color);
}

.timeline-card {
  position: relative;
  padding: 30px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.92);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.timeline-card:hover {
  box-shadow: 0 28px 70px rgba(37, 99, 235, 0.13);
  transform: translateY(-5px);
}

.timeline-card::before {
  content: "";
  position: absolute;
  top: 28px;
  left: -10px;
  width: 20px;
  height: 20px;
  border-left: 1px solid rgba(148, 163, 184, 0.22);
  border-bottom: 1px solid rgba(148, 163, 184, 0.22);
  background-color: rgba(255, 255, 255, 0.92);
  transform: rotate(45deg);
}

.timeline-card-header {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 24px;
}

.timeline-label {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--primary-color);
  font-size: 0.9rem;
  font-weight: 700;
}

.timeline-card h3 {
  margin-bottom: 0;
  color: var(--dark-color);
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  font-weight: 700;
}

.timeline-date {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  min-height: 38px;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.1);
  font-size: 0.88rem;
  font-weight: 700;
  white-space: nowrap;
}

.education-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 22px;
}

.meta-box {
  padding: 18px;
  border-radius: 8px;
  background-color: var(--light-color);
}

.meta-box span {
  display: block;
  margin-bottom: 6px;
  color: var(--text-muted);
  font-size: 0.86rem;
  font-weight: 500;
}

.meta-box strong {
  color: var(--dark-color);
  font-size: 1rem;
  font-weight: 700;
}

.course-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.course-list span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 8px 12px;
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: 999px;
  color: var(--dark-color);
  background-color: rgba(248, 250, 252, 0.9);
  font-size: 0.9rem;
  font-weight: 600;
}

.experience-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.experience-list li {
  position: relative;
  padding-left: 34px;
  color: var(--text-muted);
  line-height: 1.7;
}

.experience-list li::before {
  content: "\F633";
  position: absolute;
  top: 2px;
  left: 0;
  display: inline-flex;
  width: 24px;
  height: 24px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--white-color);
  background-color: var(--primary-color);
  font-family: "bootstrap-icons";
  font-size: 0.75rem;
}

.projects-section {
  padding: 110px 0;
  background-color: var(--white-color);
}

.project-card {
  height: 100%;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 8px;
  background-color: var(--white-color);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.project-card:hover {
  border-color: rgba(37, 99, 235, 0.24);
  box-shadow: 0 32px 80px rgba(37, 99, 235, 0.15);
  transform: translateY(-8px);
}

.project-thumbnail {
  position: relative;
  display: flex;
  min-height: 230px;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: var(--white-color);
  background:
    radial-gradient(circle at 22% 24%, rgba(56, 189, 248, 0.88), transparent 32%),
    linear-gradient(135deg, var(--primary-color), var(--dark-color));
}

.project-thumbnail::before {
  content: "";
  position: absolute;
  inset: 22px;
  z-index: 1;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
}

.project-thumbnail img {
  width: 100%;
  height: 100%;
  min-height: 230px;
  object-fit: cover;
}

.project-thumbnail i {
  position: relative;
  z-index: 1;
  font-size: clamp(4.5rem, 10vw, 6.5rem);
  opacity: 0.94;
  transition: transform 0.24s ease;
}

.project-card:hover .project-thumbnail i {
  transform: scale(1.08) rotate(-3deg);
}

.project-content {
  padding: 28px;
}

.project-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.project-period {
  display: inline-flex;
  margin-bottom: 9px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.1);
  font-size: 0.84rem;
  font-weight: 700;
}

.project-card h3 {
  margin-bottom: 0;
  color: var(--dark-color);
  font-size: clamp(1.25rem, 3vw, 1.55rem);
  font-weight: 700;
  line-height: 1.35;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.project-tech span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 11px;
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: 999px;
  color: var(--dark-color);
  background-color: rgba(56, 189, 248, 0.1);
  font-size: 0.84rem;
  font-weight: 600;
}

.project-list {
  display: grid;
  gap: 12px;
  min-height: 146px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.project-list li {
  position: relative;
  padding-left: 28px;
  color: var(--text-muted);
  line-height: 1.65;
}

.project-list li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 4px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--accent-color);
  box-shadow: 0 0 0 5px rgba(56, 189, 248, 0.14);
}

.project-description {
  min-height: 132px;
  margin: 0 0 26px;
  color: var(--text-muted);
  line-height: 1.75;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.project-actions .btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 600;
}

.skills-section {
  padding: 110px 0;
}

.training-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 38px;
  padding: 30px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 8px;
  background-color: var(--white-color);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
  transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.training-card:hover {
  box-shadow: 0 30px 72px rgba(37, 99, 235, 0.14);
  transform: translateY(-6px);
}

.training-icon {
  display: inline-flex;
  width: 74px;
  height: 74px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--white-color);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  box-shadow: 0 18px 34px rgba(37, 99, 235, 0.22);
  font-size: 2rem;
}

.training-label {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--primary-color);
  font-size: 0.88rem;
  font-weight: 700;
}

.training-header {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 18px;
}

.training-header h3 {
  margin-bottom: 0;
  color: var(--dark-color);
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  font-weight: 700;
}

.training-header span {
  display: inline-flex;
  flex: 0 0 auto;
  min-height: 36px;
  align-items: center;
  padding: 8px 13px;
  border-radius: 999px;
  color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.1);
  font-size: 0.86rem;
  font-weight: 700;
  white-space: nowrap;
}

.training-materials,
.skill-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.training-materials span,
.skill-badges span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 11px;
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: 999px;
  color: var(--dark-color);
  background-color: rgba(56, 189, 248, 0.1);
  font-size: 0.84rem;
  font-weight: 600;
}

.skills-grid {
  align-items: stretch;
}

.skill-card {
  display: flex;
  height: 100%;
  min-height: 290px;
  flex-direction: column;
  padding: 26px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 8px;
  background-color: var(--white-color);
  box-shadow: 0 20px 48px rgba(15, 23, 42, 0.07);
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.skill-card:hover {
  border-color: rgba(37, 99, 235, 0.22);
  box-shadow: 0 28px 68px rgba(37, 99, 235, 0.13);
  transform: translateY(-6px);
}

.skill-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.skill-icon {
  display: inline-flex;
  width: 50px;
  height: 50px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--white-color);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  font-size: 1.35rem;
}

.skill-card h3 {
  margin-bottom: 0;
  color: var(--dark-color);
  font-size: 1.2rem;
  font-weight: 700;
}

.skill-progress {
  margin-top: auto;
  padding-top: 26px;
}

.progress-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
}

.progress-label strong {
  color: var(--primary-color);
}

.skill-progress .progress {
  height: 10px;
  border-radius: 999px;
  background-color: rgba(37, 99, 235, 0.1);
}

.skill-progress-bar {
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  transition: width 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.contact-section {
  padding: 110px 0;
  background-color: var(--white-color);
}

.contact-info-card,
.contact-form {
  height: 100%;
  padding: 30px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 8px;
  background-color: var(--white-color);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
}

.contact-info-card {
  background:
    radial-gradient(circle at 90% 8%, rgba(56, 189, 248, 0.16), transparent 32%),
    var(--contact-card-bg);
  color: var(--white-color);
}

.contact-info-card h3 {
  margin-bottom: 10px;
  font-size: 1.45rem;
  font-weight: 700;
}

.contact-info-card > p {
  margin-bottom: 26px;
  color: rgba(248, 250, 252, 0.72);
  line-height: 1.75;
}

.contact-info-list {
  display: grid;
  gap: 14px;
}

.contact-info-item {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid rgba(248, 250, 252, 0.12);
  border-radius: 8px;
  color: var(--white-color);
  background-color: rgba(248, 250, 252, 0.08);
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.contact-info-item:hover {
  border-color: rgba(56, 189, 248, 0.42);
  color: var(--white-color);
  background-color: rgba(37, 99, 235, 0.24);
  transform: translateY(-3px);
}

.contact-info-item > i {
  display: inline-flex;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--white-color);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  font-size: 1.15rem;
}

.contact-info-item span {
  display: grid;
  gap: 2px;
  min-width: 0;
  overflow-wrap: anywhere;
  font-weight: 600;
}

.contact-info-item small {
  color: rgba(248, 250, 252, 0.62);
  font-size: 0.78rem;
  font-weight: 500;
}

.map-placeholder {
  display: flex;
  gap: 14px;
  align-items: center;
  min-height: 136px;
  margin-top: 24px;
  padding: 20px;
  border: 1px dashed rgba(56, 189, 248, 0.42);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(248, 250, 252, 0.08), rgba(56, 189, 248, 0.12)),
    repeating-linear-gradient(45deg, rgba(248, 250, 252, 0.04) 0 8px, transparent 8px 16px);
}

.map-placeholder > i {
  display: inline-flex;
  width: 54px;
  height: 54px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--accent-color);
  background-color: rgba(248, 250, 252, 0.1);
  font-size: 1.6rem;
}

.map-placeholder div {
  display: grid;
  gap: 4px;
}

.map-placeholder span {
  color: rgba(248, 250, 252, 0.68);
}

.contact-form .form-label {
  margin-bottom: 8px;
  color: var(--dark-color);
  font-size: 0.92rem;
  font-weight: 700;
}

.input-icon {
  position: relative;
}

.input-icon > i {
  position: absolute;
  top: 50%;
  left: 15px;
  color: var(--text-muted);
  transform: translateY(-50%);
}

.input-icon .form-control {
  padding-left: 44px;
}

.contact-form .form-control {
  min-height: 50px;
  border: 1px solid rgba(148, 163, 184, 0.34);
  border-radius: 8px;
  color: var(--dark-color);
  background-color: var(--light-color);
  font-size: 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.contact-form .form-control::placeholder {
  color: rgba(100, 116, 139, 0.72);
  opacity: 1;
}

.contact-form textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

.contact-form .form-control:focus {
  border-color: var(--primary-color);
  background-color: var(--white-color);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.contact-form .form-control.is-invalid {
  border-color: #EF4444;
  box-shadow: none;
}

.contact-form .invalid-feedback {
  font-size: 0.84rem;
  font-weight: 500;
}

.form-alert {
  display: none;
  padding: 13px 15px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
}

.form-alert.show {
  display: block;
}

.form-alert.success {
  color: #166534;
  background-color: #DCFCE7;
}

.form-alert.error {
  color: #991B1B;
  background-color: #FEE2E2;
}

.contact-submit {
  min-width: 180px;
}

.glass-surface,
.about-card,
.stat-card,
.timeline-card,
.project-card,
.training-card,
.skill-card,
.contact-form,
.hero-floating-card {
  border-color: var(--border-color);
  background-color: var(--surface-color);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.about-feature,
.meta-box,
.contact-form .form-control {
  background-color: rgba(248, 250, 252, 0.72);
}

.about-card:hover,
.stat-card:hover,
.timeline-card:hover,
.project-card:hover,
.training-card:hover,
.skill-card:hover,
.contact-form:hover {
  box-shadow: var(--shadow-hover);
}

.hero-section,
.timeline-section,
.projects-section,
.contact-section,
.section-placeholder {
  background-color: var(--surface-solid);
}

.section-muted,
.about-section,
.skills-section {
  background-color: var(--light-color);
}

body.dark-mode .portfolio-navbar {
  background-color: rgba(15, 23, 42, 0.7);
}

body.dark-mode .portfolio-navbar.navbar-scrolled {
  background-color: rgba(15, 23, 42, 0.88);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}

body.dark-mode .about-feature,
body.dark-mode .meta-box,
body.dark-mode .contact-form .form-control {
  background-color: rgba(15, 23, 42, 0.72);
}

body.dark-mode .contact-form .form-control::placeholder {
  color: rgba(203, 213, 225, 0.66);
}

body.dark-mode .hero-section {
  background:
    radial-gradient(circle at 12% 20%, rgba(56, 189, 248, 0.16), transparent 32%),
    radial-gradient(circle at 88% 18%, rgba(37, 99, 235, 0.24), transparent 34%),
    linear-gradient(135deg, #020617 0%, #0F172A 52%, #111827 100%);
}

body.dark-mode .hero-badge,
body.dark-mode .section-badge,
body.dark-mode .timeline-date,
body.dark-mode .project-period,
body.dark-mode .training-header span,
body.dark-mode .course-list span,
body.dark-mode .project-tech span,
body.dark-mode .training-materials span,
body.dark-mode .skill-badges span {
  background-color: rgba(37, 99, 235, 0.14);
  border-color: rgba(56, 189, 248, 0.2);
}

body.dark-mode .timeline-card::before {
  border-color: var(--border-color);
  background-color: rgba(15, 23, 42, 0.92);
}

body.dark-mode .btn-outline-custom {
  border-color: rgba(148, 163, 184, 0.24);
  color: var(--dark-color);
  background-color: rgba(15, 23, 42, 0.62);
}

body.dark-mode .footer {
  background-color: #020617;
}

body.dark-mode .footer-social a {
  color: #F8FAFC;
  background-color: rgba(248, 250, 252, 0.08);
}

body.dark-mode .navbar-toggler-icon {
  filter: invert(1);
}

.section-placeholder {
  min-height: 65vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background-color: var(--white-color);
}

.section-muted {
  background-color: var(--light-color);
}

.section-placeholder h1,
.section-placeholder h2 {
  margin: 0;
  font-weight: 700;
  color: var(--dark-color);
}

.section-placeholder h1 {
  font-size: clamp(2.25rem, 6vw, 4.5rem);
}

.section-placeholder h2 {
  font-size: clamp(1.75rem, 4vw, 3rem);
}

.footer {
  padding: 28px 0;
  color: var(--light-color);
  background-color: var(--dark-color);
}

.footer p {
  color: rgba(248, 250, 252, 0.78);
}

.footer-social a {
  display: inline-flex;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--light-color);
  background-color: rgba(248, 250, 252, 0.08);
  transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.footer-social a:hover {
  color: var(--white-color);
  background-color: var(--primary-color);
  transform: translateY(-3px);
}

.scroll-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 1000;
  display: inline-flex;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 8px;
  color: var(--white-color);
  background-color: var(--primary-color);
  box-shadow: 0 12px 26px rgba(37, 99, 235, 0.28);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}

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

.scroll-to-top:hover {
  background-color: #1D4ED8;
}

@media (max-width: 991.98px) {
  .navbar-collapse {
    margin-top: 14px;
    padding: 14px;
    border-radius: 8px;
    background-color: var(--white-color);
    box-shadow: 0 18px 38px rgba(15, 23, 42, 0.1);
  }

  body.dark-mode .navbar-collapse {
    background-color: rgba(15, 23, 42, 0.92);
  }

  .navbar-nav .nav-link {
    margin-left: 0;
  }

  .navbar-nav .nav-contact {
    margin-top: 8px;
    margin-left: 0;
    text-align: center;
  }

  .hero-section {
    padding-top: 118px;
    text-align: center;
  }

  .hero-description {
    margin-inline: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-visual {
    min-height: 430px;
  }

  .hero-card-top {
    left: 7%;
  }

  .hero-card-bottom {
    right: 7%;
  }

  .about-section {
    padding: 92px 0;
  }

  .timeline-section {
    padding: 92px 0;
  }

  .projects-section {
    padding: 92px 0;
  }

  .skills-section {
    padding: 92px 0;
  }

  .contact-section {
    padding: 92px 0;
  }
}

@media (max-width: 575.98px) {
  :root {
    --navbar-height: 70px;
  }

  .section-placeholder {
    min-height: 55vh;
    padding: 96px 0 64px;
  }

  .hero-section {
    min-height: auto;
    padding: 108px 0 72px;
  }

  .hero-badge {
    font-size: 0.84rem;
  }

  .hero-profession {
    min-height: 64px;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-visual {
    min-height: 360px;
  }

  .hero-floating-card {
    padding: 10px 12px;
    font-size: 0.8rem;
  }

  .hero-floating-card i {
    width: 30px;
    height: 30px;
  }

  .hero-card-top {
    top: 38px;
    left: 0;
  }

  .hero-card-bottom {
    right: 0;
    bottom: 42px;
  }

  .about-section {
    padding: 76px 0;
  }

  .about-card {
    padding: 18px;
  }

  .about-feature {
    padding: 16px;
  }

  .timeline-section {
    padding: 76px 0;
  }

  .section-heading {
    margin-bottom: 38px;
  }

  .timeline-wrapper::before {
    left: 23px;
  }

  .timeline-item {
    grid-template-columns: 48px 1fr;
    gap: 16px;
  }

  .timeline-marker {
    width: 48px;
    height: 48px;
    border-width: 6px;
    font-size: 1rem;
  }

  .timeline-card {
    padding: 22px 18px;
  }

  .timeline-card::before {
    top: 20px;
  }

  .timeline-card-header {
    flex-direction: column;
    gap: 12px;
  }

  .timeline-date {
    white-space: normal;
  }

  .education-meta {
    grid-template-columns: 1fr;
  }

  .projects-section {
    padding: 76px 0;
  }

  .project-thumbnail {
    min-height: 190px;
  }

  .project-content {
    padding: 22px 18px;
  }

  .project-list {
    min-height: 0;
  }

  .project-description {
    min-height: 0;
  }

  .project-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .skills-section {
    padding: 76px 0;
  }

  .training-card {
    grid-template-columns: 1fr;
    padding: 22px 18px;
  }

  .training-header {
    flex-direction: column;
    gap: 12px;
  }

  .training-header span {
    white-space: normal;
  }

  .skill-card {
    min-height: 0;
    padding: 22px 18px;
  }

  .contact-section {
    padding: 76px 0;
  }

  .contact-info-card,
  .contact-form {
    padding: 22px 18px;
  }

  .contact-submit {
    width: 100%;
    justify-content: center;
  }

  .scroll-to-top {
    right: 16px;
    bottom: 16px;
  }
}

@media (max-width: 420px) {
  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .hero-floating-card {
    position: static;
    margin-top: 12px;
  }

  .hero-visual {
    display: grid;
    min-height: auto;
    gap: 8px;
    justify-items: center;
  }

  .profile-frame {
    width: min(76vw, 280px);
  }

  .profile-glow {
    width: min(80vw, 320px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}