:root {
  --bg: #050816;
  --bg-alt: #0b1020;
  --bg-elevated: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
  --accent-soft: rgba(34, 197, 94, 0.15);
  --border-subtle: rgba(148, 163, 184, 0.25);
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.7);
  --radius-lg: 18px;
  --radius-xl: 24px;
  --transition-fast: 0.2s ease;
}

[data-theme="light"] {
  --bg: #f4f5fb;
  --bg-alt: #ffffff;
  --bg-elevated: #ffffff;
  --text: #020617;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --border-subtle: rgba(148, 163, 184, 0.5);
  --shadow-soft: 0 14px 35px rgba(15, 23, 42, 0.15);
}

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

html,
body {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: radial-gradient(circle at top, #0f172a 0, var(--bg) 40%);
  color: var(--text);
  line-height: 1.6;
}

/* Container */
.container {
  width: min(1120px, 100% - 32px);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.4));
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 10px;
  gap: 1rem;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  background: conic-gradient(from 190deg, #22c55e, #22d3ee, #8b5cf6, #22c55e);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #0f172a;
  font-weight: 700;
  font-size: 0.95rem;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.logo-tagline {
  font-size: 0.75rem;
  color: var(--muted);
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 999px;
  transition: background var(--transition-fast), color var(--transition-fast), transform 0.12s ease;
}

.nav-link:hover {
  background: rgba(148, 163, 184, 0.18);
  color: var(--text);
  transform: translateY(-1px);
}

.nav-link.active {
  background: var(--accent-soft);
  color: var(--accent);
}

/* Theme Toggle */
.theme-toggle {
  border: none;
  background: rgba(15, 23, 42, 0.8);
  color: var(--muted);
  border-radius: 999px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast), transform 0.1s ease;
}

.theme-toggle:hover {
  background: rgba(30, 64, 175, 0.35);
  transform: translateY(-1px);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 1.2rem;
  cursor: pointer;
}

/* Sections */
.section {
  padding-block: 72px;
}

.section-alt {
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.12), transparent 55%), radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.12), transparent 60%), linear-gradient(to bottom, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.96));
}

.section-header {
  text-align: center;
  margin-bottom: 36px;
}

.section-header h2 {
  font-size: 1.8rem;
  margin-bottom: 6px;
}

.section-header p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

/* Hero */
.hero {
  padding-block: 96px 80px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.4fr);
  gap: 2.4rem;
  align-items: center;
}

.hero-eyebrow {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.hero-title {
  font-size: clamp(2.4rem, 4vw, 3rem);
  margin: 0 0 6px;
}

.hero-title span {
  color: var(--accent);
}

.hero-subtitle {
  margin: 0;
  font-size: 1.05rem;
  color: var(--muted);
  min-height: 1.4em;
}

.hero-text {
  margin-top: 16px;
  font-size: 0.95rem;
  max-width: 520px;
  color: rgba(209, 213, 219, 0.94);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 22px;
}

.btn {
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 0.9rem;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-fast), transform 0.12s ease, box-shadow var(--transition-fast), border var(--transition-fast), color var(--transition-fast);
}

.btn.primary {
  background: var(--accent);
  color: #020617;
  box-shadow: 0 14px 35px rgba(16, 185, 129, 0.6);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 50px rgba(16, 185, 129, 0.8);
}

.btn.ghost {
  background: transparent;
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.5);
}

.btn.ghost:hover {
  background: rgba(15, 23, 42, 0.9);
  border-color: var(--accent);
}

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

/* Social */
.hero-social {
  display: flex;
  gap: 0.75rem;
  margin-top: 18px;
}

.hero-social a {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  text-decoration: none;
  transition: background var(--transition-fast), border var(--transition-fast), transform 0.12s ease, color var(--transition-fast);
}

.hero-social a:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

/* Hero visual */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-photo-frame {
  position: relative;
  width: min(320px, 100%);
  border-radius: 26px;
  background: radial-gradient(circle at top, rgba(34, 197, 94, 0.2), rgba(37, 99, 235, 0.06));
  padding: 6px;
  box-shadow: var(--shadow-soft);
}

.hero-photo-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: conic-gradient(from 210deg, rgba(34, 197, 94, 0.5), rgba(59, 130, 246, 0.4), rgba(139, 92, 246, 0.4), rgba(34, 197, 94, 0.5));
  opacity: 0.35;
  filter: blur(6px);
  z-index: -1;
}

.hero-photo {
  width: 100%;
  border-radius: 22px;
  object-fit: cover;
  display: block;
}

/* Hero badges */
.hero-badges {
  position: absolute;
  inset: auto 0 -12px;
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  pointer-events: none;
}

.badge-card {
  pointer-events: auto;
  min-width: 120px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.5);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.8);
}

.badge-title {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-text {
  display: block;
  font-size: 0.7rem;
  color: var(--muted);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(0, 1.2fr);
  gap: 2.4rem;
  align-items: flex-start;
}

.about-text p {
  margin-top: 0;
  font-size: 0.95rem;
  color: rgba(209, 213, 219, 0.96);
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem 1.2rem;
  margin-top: 1.4rem;
}

.about-item {
  padding: 8px 10px;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.about-item .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--muted);
}

.about-item .value {
  display: block;
  font-size: 0.83rem;
}

.about-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mini-card {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.mini-card h3 {
  margin: 0 0 6px;
  font-size: 0.95rem;
}

.mini-card ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 14px;
  border-left: 1px dashed rgba(148, 163, 184, 0.6);
}

.timeline-item {
  position: relative;
  padding-left: 16px;
  margin-bottom: 26px;
}

.timeline-marker {
  position: absolute;
  left: -8px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.2);
}

.timeline-content {
  background: rgba(15, 23, 42, 0.94);
  border-radius: 16px;
  padding: 14px 16px;
  border: 1px solid rgba(148, 163, 184, 0.45);
}

.timeline-header {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  align-items: baseline;
  margin-bottom: 6px;
}

.timeline-header h3 {
  margin: 0;
  font-size: 1rem;
}

.timeline-header .company {
  font-size: 0.82rem;
  color: var(--muted);
}

.timeline-header .time {
  margin-left: auto;
  font-size: 0.78rem;
  color: var(--muted);
}

.timeline-list {
  margin: 8px 0 8px;
  padding-left: 1.1rem;
  font-size: 0.85rem;
  color: rgba(209, 213, 219, 0.96);
}

.timeline-list li + li {
  margin-top: 4px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.5);
}

/* Skills */
.skills-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 2fr);
  gap: 2.4rem;
  align-items: flex-start;
}

.skills-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.skills-tab {
  border-radius: 999px;
  padding: 7px 10px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: transparent;
  color: var(--muted);
  text-align: left;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition-fast), border var(--transition-fast), color var(--transition-fast), transform 0.1s ease;
}

.skills-tab:hover {
  transform: translateY(-1px);
}

.skills-tab.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.skills-content {
  background: rgba(15, 23, 42, 0.95);
  border-radius: 18px;
  padding: 16px 18px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  box-shadow: var(--shadow-soft);
  min-height: 190px;
}

.skills-panel {
  display: none;
}

.skills-panel.active {
  display: block;
}

.skill-bar {
  display: grid;
  grid-template-columns: 1.3fr 2.5fr auto;
  gap: 0.8rem;
  align-items: center;
  font-size: 0.85rem;
}

.skill-bar + .skill-bar {
  margin-top: 12px;
}

.skill-name {
  font-weight: 500;
}

.skill-meter {
  position: relative;
  height: 6px;
  border-radius: 999px;
  background: rgba(30, 64, 175, 0.35);
  overflow: hidden;
}

.skill-meter span {
  position: absolute;
  inset: 0;
  max-width: var(--level);
  background: linear-gradient(90deg, #22c55e, #22d3ee);
  border-radius: inherit;
  transform-origin: left;
  animation: fill-bar 1.3s ease forwards;
}

.skill-level {
  font-size: 0.75rem;
  color: var(--muted);
}

@keyframes fill-bar {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

.skill-list {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.88rem;
  color: rgba(209, 213, 219, 0.97);
}

.skill-list li + li {
  margin-top: 4px;
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip {
  font-size: 0.8rem;
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.5);
}

/* Certificates */
.certificates {
  margin-top: 32px;
}

.certificates h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem;
}

.cert-card {
  border-radius: 14px;
  padding: 10px 12px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.4);
  font-size: 0.85rem;
}

.cert-card h4 {
  margin: 0 0 4px;
  font-size: 0.9rem;
}

/* Projects */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  margin-bottom: 24px;
}

.filter-btn {
  border-radius: 999px;
  padding: 5px 11px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: transparent;
  color: var(--muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition-fast), border var(--transition-fast), color var(--transition-fast), transform 0.1s ease;
}

.filter-btn:hover {
  transform: translateY(-1px);
}

.filter-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.1rem;
}

.project-card {
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 14px 14px 10px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 14px 36px rgba(15, 23, 42, 0.85);
  transform: translateY(0);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border var(--transition-fast);
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 22px 55px rgba(15, 23, 42, 0.95);
}

.project-body h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.project-body p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.project-tags {
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  font-size: 0.75rem;
}

.project-tags li {
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
}

.project-footer {
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
}

.project-details-btn {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: transparent;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 5px 9px;
  cursor: pointer;
  transition: background var(--transition-fast), border var(--transition-fast), color var(--transition-fast), transform 0.1s ease;
}

.project-details-btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.project-link {
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
}

.project-link:hover {
  text-decoration: underline;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.82);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 60;
  padding: 16px;
}

.modal-overlay.open {
  display: flex;
}

.modal {
  position: relative;
  width: min(520px, 100%);
  border-radius: 20px;
  background: rgba(15, 23, 42, 0.98);
  border: 1px solid rgba(148, 163, 184, 0.6);
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.96);
  padding: 18px 18px 16px;
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.95);
  color: var(--muted);
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.modal-content h3 {
  margin-top: 4px;
  margin-bottom: 6px;
}

.modal-content p {
  font-size: 0.9rem;
  color: rgba(209, 213, 219, 0.95);
}

.modal-content ul {
  font-size: 0.88rem;
  margin-top: 10px;
  padding-left: 1.1rem;
}

/* Education */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.2rem;
}

.edu-card {
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.45);
  padding: 14px 16px;
}

.edu-card h3 {
  margin-top: 0;
  margin-bottom: 4px;
  font-size: 1rem;
}

.edu-school {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.edu-time {
  margin: 4px 0 8px;
  font-size: 0.8rem;
  color: var(--muted);
}

.edu-card ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.86rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.6fr);
  gap: 2.4rem;
  align-items: flex-start;
}

.contact-info h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.contact-info p {
  font-size: 0.92rem;
  color: var(--muted);
}

.contact-details {
  margin-top: 14px;
  display: grid;
  gap: 0.7rem;
}

.contact-details div {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
}

.contact-details i {
  width: 24px;
  text-align: center;
  color: var(--accent);
}

.contact-details a {
  color: var(--text);
  text-decoration: none;
}

.contact-details a:hover {
  text-decoration: underline;
}

/* Contact form */
.contact-form {
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.96);
  border: 1px solid rgba(148, 163, 184, 0.5);
  padding: 16px 18px;
  box-shadow: var(--shadow-soft);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 10px;
}

.form-field label {
  font-size: 0.8rem;
  color: var(--muted);
}

.form-field input,
.form-field textarea {
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.55);
  padding: 8px 10px;
  font-size: 0.9rem;
  background: rgba(15, 23, 42, 0.95);
  color: var(--text);
  outline: none;
  transition: border var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.5);
}

.form-note {
  margin-top: 8px;
  font-size: 0.75rem;
  color: var(--muted);
}

/* Footer */
.site-footer {
  padding-block: 18px;
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  background: rgba(15, 23, 42, 0.98);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.footer-small {
  opacity: 0.8;
}

/* Toast (for contact form) */
.toast {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.96);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  font-size: 0.8rem;
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.9);
  z-index: 70;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-visual {
    order: -1;
  }

  .hero-badges {
    position: static;
    margin-top: 10px;
  }

  .about-grid,
  .skills-layout,
  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding-block: 8px;
  }

  .nav-links {
    position: absolute;
    right: 12px;
    top: 56px;
    flex-direction: column;
    background: rgba(15, 23, 42, 0.98);
    padding: 10px;
    border-radius: 14px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    display: none;
    min-width: 160px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .hero {
    padding-top: 88px;
  }

  .timeline {
    padding-left: 10px;
  }
}

@media (max-width: 640px) {
  .about-highlights {
    grid-template-columns: minmax(0, 1fr);
  }

  .form-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .section {
    padding-block: 60px;
  }
}