:root {
  --bg-main: #0F172A;
  --bg-card: #1E293B;
  --bg-card-subtle: #162032;
  --accent-primary: #0EA5E9;
  --accent-primary-hover: #38BDF8;
  --accent-secondary: #10B981;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --border-color: #334155;
  --border-light: rgba(255, 255, 255, 0.08);
  --glow-primary: rgba(14, 165, 233, 0.25);
  --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', Courier, monospace;
  --radius-card: 8px;
  --radius-btn: 6px;
  --shadow-main: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --max-width: 1200px;
}

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

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

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header & Sticky Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
}

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

.brand-logo {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.brand-bracket {
  color: var(--accent-secondary);
}

.brand-highlight {
  color: var(--accent-primary);
}

.mobile-nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 110;
}

.hamburger-bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all 0.25s ease;
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.primary-nav {
  position: fixed;
  top: 65px;
  left: 0;
  width: 100%;
  background-color: var(--bg-main);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 1.25rem;
  transform: translateY(-150%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-main);
}

.primary-nav.is-open {
  transform: translateY(0);
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.nav-link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: block;
  padding: 0.5rem 0;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--accent-primary);
}

.nav-btn {
  display: inline-block;
  text-align: center;
  background-color: var(--accent-primary);
  color: #FFFFFF !important;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-btn);
  font-weight: 600;
}

.nav-btn:hover {
  background-color: var(--accent-primary-hover);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.35);
}

.btn-primary:hover {
  background-color: var(--accent-primary-hover);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: #27354a;
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.btn-block {
  width: 100%;
}

/* Typography & Section Titles */
.section-header {
  margin-bottom: 2.5rem;
}

.section-subtitle {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-secondary);
  margin-bottom: 0.5rem;
  letter-spacing: 1px;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.section-description {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
}

/* Hero Section */
.hero-section {
  padding: 3rem 0 4rem;
}

.hero-grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 0.35rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  color: var(--accent-secondary);
  margin-bottom: 1.25rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-secondary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-secondary);
}

.hero-title {
  font-size: 2.15rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin-bottom: 1rem;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Hero Terminal Widget */
.terminal-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-main);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.terminal-header {
  background-color: #0b1120;
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background-color: #EF4444; }
.dot-yellow { background-color: #F59E0B; }
.dot-green { background-color: #10B981; }

.terminal-title {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

.terminal-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  overflow-x: auto;
}

.code-line {
  white-space: pre-wrap;
  word-break: break-all;
}

.indent-1 { padding-left: 1.25rem; }
.code-keyword { color: #F43F5E; }
.code-var { color: #38BDF8; }
.code-prop { color: #A78BFA; }
.code-str { color: #34D399; }
.code-bool { color: #F59E0B; }

.terminal-output {
  margin-top: 0.75rem;
  color: var(--accent-primary);
}

.terminal-success {
  color: var(--accent-secondary);
}

/* About Section */
.about-section {
  padding: 4rem 0;
  border-top: 1px solid var(--border-color);
}

.about-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.about-image-wrapper {
  position: relative;
  max-width: 400px;
  margin: 0 auto;
}

.about-image {
  border-radius: var(--radius-card);
  border: 1px solid var(--border-color);
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.experience-tag {
  position: absolute;
  bottom: -15px;
  right: -10px;
  background-color: var(--bg-card);
  border: 1px solid var(--accent-primary);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-main);
  display: flex;
  flex-direction: column;
}

.experience-number {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent-primary);
}

.experience-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.about-heading {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.about-paragraph {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.about-highlights {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  background-color: var(--bg-card);
  padding: 1.25rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-color);
}

.highlight-item {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
}

.highlight-key {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.highlight-val {
  color: var(--text-primary);
  font-weight: 600;
}

/* Tech Stack Section (Bento Grid) */
.tech-section {
  padding: 4rem 0;
  border-top: 1px solid var(--border-color);
}

.bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.bento-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.bento-card:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 10px 25px -5px var(--glow-primary);
}

.bento-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.tech-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
}

.tech-java { background-color: rgba(239, 68, 68, 0.15); color: #F87171; border: 1px solid rgba(239, 68, 68, 0.3); }
.tech-python { background-color: rgba(14, 165, 233, 0.15); color: #38BDF8; border: 1px solid rgba(14, 165, 233, 0.3); }
.tech-sql { background-color: rgba(16, 185, 129, 0.15); color: #34D399; border: 1px solid rgba(16, 185, 129, 0.3); }
.tech-css { background-color: rgba(168, 85, 247, 0.15); color: #C084FC; border: 1px solid rgba(168, 85, 247, 0.3); }

.tech-category {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.bento-card-title {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}

.bento-card-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.tech-features-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  color: var(--text-secondary);
}

.bento-visual-card {
  gap: 1.5rem;
}

.bento-img {
  border-radius: var(--radius-card);
  border: 1px solid var(--border-color);
  aspect-ratio: 16 / 9;
  object-fit: cover;
  width: 100%;
}

/* Services Section */
.services-section {
  padding: 4rem 0;
  border-top: 1px solid var(--border-color);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.service-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.service-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-primary);
}

.service-icon-box {
  width: 48px;
  height: 48px;
  background-color: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.service-icon {
  width: 24px;
  height: 24px;
  stroke: var(--accent-primary);
}

.service-title {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.service-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Contact & Location Section */
.contact-section {
  padding: 4rem 0 5rem;
  border-top: 1px solid var(--border-color);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.contact-form-panel,
.contact-info-panel {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 1.75rem;
}

.panel-title {
  font-size: 1.3rem;
  margin-bottom: 1.25rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.form-input,
.form-textarea {
  width: 100%;
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-btn);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

.form-error {
  display: none;
  font-size: 0.75rem;
  color: #EF4444;
}

.form-group.has-error .form-error {
  display: block;
}

.form-group.has-error .form-input,
.form-group.has-error .form-textarea {
  border-color: #EF4444;
}

.form-feedback {
  margin-top: 0.75rem;
  padding: 0.75rem;
  border-radius: var(--radius-btn);
  font-size: 0.85rem;
  display: none;
}

.form-feedback.success {
  display: block;
  background-color: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--accent-secondary);
  color: #A7F3D0;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.info-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background-color: var(--bg-main);
  padding: 1rem;
  border-radius: var(--radius-btn);
  border: 1px solid var(--border-color);
}

.info-icon-wrapper {
  width: 40px;
  height: 40px;
  background-color: rgba(14, 165, 233, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.info-icon {
  width: 20px;
  height: 20px;
  stroke: var(--accent-primary);
}

.info-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-val {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}

.info-val:hover {
  color: var(--accent-primary);
}

.map-container {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-main);
  border-radius: var(--radius-btn);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.map-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background-color: var(--bg-card-subtle);
  border-bottom: 1px solid var(--border-color);
}

.map-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-secondary);
}

.map-title {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.map-frame-wrapper {
  position: relative;
  width: 100%;
  height: 240px;
}

.google-map-embed {
  width: 100%;
  height: 100%;
  border: none;
  filter: grayscale(80%) invert(90%) contrast(90%);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  background-color: #0B1120;
  color: var(--text-secondary);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
  font-size: 0.85rem;
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-tech {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
}

/* Progressive Desktop Breakpoints */
@media (min-width: 640px) {
  .hero-actions {
    flex-direction: row;
  }
  
  .about-highlights {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.25rem;
  }

  .mobile-nav-toggle {
    display: none;
  }

  .primary-nav {
    position: static;
    width: auto;
    background-color: transparent;
    border-bottom: none;
    padding: 0;
    transform: none;
    box-shadow: none;
  }

  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
  }

  .nav-link {
    padding: 0;
  }

  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .bento-card-large {
    grid-column: span 2;
  }

  .bento-visual-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 992px) {
  .hero-section {
    padding: 5rem 0 6rem;
  }

  .hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 3.5rem;
  }

  .hero-title {
    font-size: 2.75rem;
  }

  .about-grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    align-items: center;
    gap: 3.5rem;
  }

  .about-image-wrapper {
    margin: 0;
  }

  .contact-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .footer-content {
    flex-direction: row;
    justify-content: space-between;
  }
}