:root {
  --bg: #0f172a;
  --bg-soft: #111827;
  --page-bg: #f8fafc;
  --section-bg: #ffffff;
  --section-alt: #f1f5f9;
  --card-bg: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #6366f1;
  --accent-dark: #4f46e5;
  --white: #ffffff;
  --header-bg: rgba(15, 23, 42, 0.94);
  --header-text: #cbd5e1;
  --hero-text: #cbd5e1;
  --shadow: rgba(15, 23, 42, 0.08);
}

html[data-theme="dark"] {
  --bg: #0f172a;
  --bg-soft: #111827;
  --page-bg: #0b1120;
  --section-bg: #0b1120;
  --section-alt: #111827;
  --card-bg: #111827;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --border: rgba(255, 255, 255, 0.12);
  --accent: #818cf8;
  --accent-dark: #6366f1;
  --white: #ffffff;
  --header-bg: rgba(15, 23, 42, 0.94);
  --header-text: #cbd5e1;
  --hero-text: #cbd5e1;
  --shadow: rgba(0, 0, 0, 0.25);
}

html[data-theme="light"] {
  --bg: #f8fafc;
  --bg-soft: #ffffff;
  --page-bg: #f8fafc;
  --section-bg: #ffffff;
  --section-alt: #f1f5f9;
  --card-bg: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #6366f1;
  --accent-dark: #4f46e5;
  --white: #ffffff;
  --header-bg: rgba(255, 255, 255, 0.94);
  --header-text: #374151;
  --hero-text: #475569;
  --shadow: rgba(15, 23, 42, 0.08);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--page-bg);
  line-height: 1.6;
  transition:
    background 0.2s ease,
    color 0.2s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, 90%);
  margin: 0 auto;
}

/* Header */

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.logo {
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  width: 34px;
  height: 34px;
  max-width: 34px;
  max-height: 34px;
  border-radius: 10px;
  object-fit: cover;
  display: block;
  flex-shrink: 0;
}

html[data-theme="dark"] .logo {
  color: var(--white);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.logo {
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  white-space: nowrap;
}

html[data-theme="dark"] .logo {
  color: var(--white);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  color: var(--header-text);
  font-size: 14px;
  position: relative;
  padding: 8px 0;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--accent);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.2s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--accent);
  font-weight: 700;
}

/* Theme button */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(17, 24, 39, 0.85);
  color: var(--header-text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.theme-icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-icon-sun {
  display: none;
}

.theme-icon-moon {
  display: block;
}

html[data-theme="dark"] .theme-icon-sun {
  display: block;
}

html[data-theme="dark"] .theme-icon-moon {
  display: none;
}

html[data-theme="light"] .theme-toggle {
  background: rgba(255, 255, 255, 0.9);
  color: #374151;
}

@media (max-width: 768px) {
  .theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 12px;
  }

  .theme-icon {
    width: 17px;
    height: 17px;
  }
}

/* Hero */

.hero-quote {
  margin-top: 18px;
  margin-bottom: 22px;
  max-width: 620px;
  padding: 14px 18px 14px 20px;
  border-left: 2px solid rgba(139, 130, 255, 0.9);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.045);
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.98rem;
  line-height: 1.65;
  font-style: italic;
  letter-spacing: 0.1px;
  position: relative;
}

.hero-quote::before {
  content: "“";
  position: absolute;
  top: -14px;
  left: 16px;
  font-size: 3.2rem;
  line-height: 1;
  color: rgba(139, 130, 255, 0.45);
  font-family: Georgia, serif;
}

.hero-quote span {
  display: block;
  padding-left: 2px;
}

.hero {
  background:
    radial-gradient(
      circle at top left,
      rgba(99, 102, 241, 0.35),
      transparent 30%
    ),
    linear-gradient(135deg, var(--section-bg), var(--section-alt));
  color: var(--text);
  padding: 96px 0;
}

html[data-theme="dark"] .hero {
  background:
    radial-gradient(
      circle at top left,
      rgba(129, 140, 248, 0.35),
      transparent 30%
    ),
    linear-gradient(135deg, #0f172a, #111827);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.tagline,
.section-label,
.project-type {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 13px;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.05;
  margin-bottom: 22px;
  max-width: 850px;
}

.hero-text {
  color: var(--hero-text);
  font-size: 18px;
  max-width: 720px;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid transparent;
  transition: 0.2s ease;
}

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

.btn.primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
}

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

.btn.secondary:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.info-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.info-cards div {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 12px 30px var(--shadow);
}

.info-cards span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 6px;
}

.info-cards strong {
  color: var(--text);
  font-size: 14px;
}

/* Profile Card */

.profile-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 28px;
  box-shadow: 0 20px 60px var(--shadow);
}

.avatar {
  width: 100%;
  height: auto;
  border-radius: 28px;
  overflow: hidden;
  margin-bottom: 28px;
  border: 3px solid var(--accent);
  box-shadow: 0 12px 30px var(--shadow);
  background: var(--card-bg);
}

.avatar img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}

.profile-card h2 {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 4px;
}

.profile-card h3 {
  font-size: 24px;
  margin-bottom: 14px;
}

.profile-card p {
  color: var(--muted);
  margin-bottom: 18px;
}

.profile-card ul {
  list-style: none;
  display: grid;
  gap: 10px;
}

.profile-card li {
  background: var(--section-alt);
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--text);
  font-size: 14px;
}

/* Sections */

.section {
  padding: 88px 0;
  background: var(--section-bg);
}

.section h2 {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.15;
  margin-bottom: 22px;
}

.section-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
}

.section-text p {
  color: var(--muted);
  font-size: 17px;
  margin-bottom: 18px;
}

.dark-section {
  background: var(--section-alt);
  color: var(--text);
}

.dark-section h2 {
  color: var(--text);
}

/* Timeline */

.timeline {
  margin-top: 36px;
  display: grid;
  gap: 24px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 28px;
  padding: 28px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  border-radius: 24px;
  box-shadow: 0 12px 30px var(--shadow);
}

.timeline-date {
  color: var(--muted);
  font-weight: 700;
}

.timeline-content h3 {
  font-size: 24px;
  margin-bottom: 4px;
}

.company {
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 14px;
}

.timeline-content ul {
  padding-left: 18px;
  color: var(--muted);
}

.timeline-content li {
  margin-bottom: 8px;
}

/* Cards */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 34px;
}

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

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 26px;
  box-shadow: 0 12px 30px var(--shadow);
  transition: 0.2s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 38px var(--shadow);
}

.project-card h3 {
  font-size: 24px;
  margin-bottom: 12px;
}

.project-card p {
  color: var(--muted);
  margin-bottom: 18px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tags span {
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent);
  font-weight: 700;
  font-size: 12px;
  padding: 7px 10px;
  border-radius: 999px;
}

.project-card a {
  color: var(--accent);
  font-weight: 800;
}

/* Stack */

.stack-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 34px;
}

.stack-card {
  border: 1px solid var(--border);
  background: var(--card-bg);
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 12px 30px var(--shadow);
}

.stack-card h3 {
  margin-bottom: 10px;
}

.stack-card p {
  color: var(--muted);
}

/* Contact */

.contact-section {
  background: var(--section-alt);
}

.contact-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 44px;
  text-align: center;
  box-shadow: 0 12px 30px var(--shadow);
}

.contact-box p {
  color: var(--muted);
  margin-bottom: 24px;
}

.contact-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.contact-links a {
  background: var(--accent);
  color: white;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
  transition: 0.2s ease;
}

.contact-links a:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
}

/* Footer */

.footer {
  background: var(--section-alt);
  color: var(--muted);
  text-align: center;
  padding: 28px;
  font-size: 14px;
  border-top: 1px solid var(--border);
}

/* Responsive */

@media (max-width: 1000px) and (min-width: 769px) {
  .nav {
    padding: 18px 0;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
  }
}

@media (max-width: 900px) {
  .hero-grid,
  .section-grid,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .info-cards,
  .cards-grid,
  .two-columns,
  .stack-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 70px 0;
  }

  .section {
    padding: 68px 0;
  }

  .contact-box {
    padding: 30px 20px;
  }
}

@media (max-width: 900px) {
  .avatar {
    width: 100%;
    height: auto;
    border-radius: 24px;
  }

  .avatar img {
    width: 100%;
    height: auto;
    object-fit: contain;
  }
}

/* Mobile sandwich menu */

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card-bg);
  color: var(--text);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: 0.2s ease;
}

.menu-toggle:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
}

/* Keep desktop normal */
.desktop-theme {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Mobile */
@media (max-width: 768px) {
  .nav {
    position: relative;
    min-height: 72px;
    padding: 12px 0;
    flex-direction: row;
  }

  .logo span {
    font-size: 14px;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 16px;
    background: var(--header-bg);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 18px 18px;
    box-shadow: 0 18px 40px var(--shadow);
    z-index: 50;
  }

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

  .nav-link {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
  }

  .nav-link:hover {
    background: var(--section-alt);
  }

  .nav-link::after {
    display: none;
  }

  .desktop-theme {
    width: 42px;
    height: 42px;
    flex-shrink: 0;
  }
}

/* Very small screens */
@media (max-width: 420px) {
  .logo span {
    max-width: 170px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .nav {
    gap: 10px;
  }
}

/* FULL SCREEN MOBILE MENU */

@media (max-width: 768px) {
  .header {
    z-index: 9999;
  }

  .nav {
    position: relative;
    min-height: 64px;
    padding: 10px 0;
    flex-direction: row !important;
    align-items: center;
    justify-content: space-between;
  }

  .logo {
    flex: 1;
    min-width: 0;
    z-index: 10001;
  }

  .logo span {
    font-size: 16px;
    font-weight: 800;
    color: var(--white);
  }

  .desktop-theme {
    z-index: 10001;
    width: 42px;
    height: 42px;
    min-width: 42px;
    border-radius: 12px;
    font-size: 14px;
    background: rgba(15, 23, 42, 0.9);
    color: var(--text);
  }

  .menu-toggle {
    display: flex !important;
    z-index: 10001;
    width: 42px;
    height: 42px;
    min-width: 42px;
    border: 1px solid var(--accent);
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.9);
    color: var(--white);
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }

  .menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    border-radius: 999px;
    transition: 0.2s ease;
  }

  .menu-toggle.open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .menu-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .nav-links {
    position: fixed !important;
    inset: 0 !important;
    display: none !important;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 110px 42px 42px;
    background: #070b18;
    z-index: 10000;
    border: none;
    border-radius: 0;
    box-shadow: none;
  }

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

  .nav-link {
    width: 100%;
    max-width: 300px;
    padding: 20px 0;
    text-align: center;
    font-size: 22px;
    font-weight: 800;
    color: #a8b3d6;
    border-bottom: 1px solid rgba(255, 255, 255, 0.11);
    border-radius: 0;
  }

  .nav-link:hover,
  .nav-link.active {
    color: var(--accent);
    background: transparent;
  }

  .nav-link::after {
    display: none;
  }
}

/* FINAL FULL SCREEN MOBILE MENU - SOLID BACKGROUND */

@media (max-width: 768px) {
  .header {
    z-index: 99999 !important;
  }

  .nav {
    position: relative !important;
    min-height: 64px;
    padding: 10px 0;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 10px;
  }

  .logo {
    flex: 1;
    min-width: 0;
    z-index: 100001 !important;
  }

  .logo span {
    font-size: 16px;
    font-weight: 800;
    color: #ffffff;
  }

  .desktop-theme {
    z-index: 100001 !important;
    width: 42px;
    height: 42px;
    min-width: 42px;
    border-radius: 12px;
    background: #111827;
    color: #ffffff;
  }

  .menu-toggle {
    display: flex !important;
    z-index: 100001 !important;
    width: 42px;
    height: 42px;
    min-width: 42px;
    border: 1px solid var(--accent);
    border-radius: 999px;
    background: #111827;
    color: #ffffff;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }

  .menu-toggle span {
    display: block !important;
    width: 24px;
    height: 2px;
    background: #ffffff;
    border-radius: 999px;
    transition: 0.2s ease;
  }

  .menu-toggle.open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .menu-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .nav-links {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    height: 100dvh !important;
    display: none !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 0 !important;
    padding: 95px 42px 42px !important;
    background: #070b18 !important;
    opacity: 1 !important;
    backdrop-filter: none !important;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    z-index: 100000 !important;
  }

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

  .nav-link {
    width: 100%;
    max-width: 300px;
    padding: 20px 0;
    text-align: center;
    font-size: 22px;
    font-weight: 800;
    color: #a8b3d6;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 0;
    background: transparent !important;
  }

  .nav-link:hover,
  .nav-link.active {
    color: var(--accent);
    background: transparent !important;
  }

  .nav-link::after {
    display: none !important;
  }

  body.menu-open {
    overflow: hidden;
  }
}

@media (max-width: 768px) {
  html[data-theme="light"] .logo span {
    color: #111827 !important;
  }

  html[data-theme="light"] .hero-quote {
    color: #334155 !important;
    background: rgba(99, 102, 241, 0.08);
    border-left-color: rgba(99, 102, 241, 0.9);
  }

  html[data-theme="light"] .hero-quote::before {
    color: rgba(99, 102, 241, 0.35);
  }
}

html[data-theme="light"] .hero-quote {
  color: #334155 !important;
  background: rgba(99, 102, 241, 0.08);
  border-left-color: rgba(99, 102, 241, 0.9);
}

html[data-theme="light"] .hero-quote::before {
  color: rgba(99, 102, 241, 0.35);
}

/* Light theme mobile menu */
@media (max-width: 768px) {
  html[data-theme="light"] .nav-links {
    background: #ffffff !important;
  }

  html[data-theme="light"] .nav-link {
    color: #334155 !important;
    border-bottom: 1px solid #e5e7eb !important;
  }

  html[data-theme="light"] .nav-link:hover,
  html[data-theme="light"] .nav-link.active {
    color: #6366f1 !important;
    background: transparent !important;
  }

  html[data-theme="light"] .logo span {
    color: #111827 !important;
  }

  html[data-theme="light"] .desktop-theme,
  html[data-theme="light"] .menu-toggle {
    background: #ffffff !important;
    color: #111827 !important;
    border-color: #e5e7eb !important;
  }

  html[data-theme="light"] .menu-toggle span {
    background: #111827 !important;
  }
}