/* fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* color scheme - light mode (default) */
:root {
  --bg: #fafafa;
  --bg-nav: rgba(250, 250, 250, 0.92);
  --bg-card: #ffffff;
  --bg-subtle: #f3f3f3;
  --text: #111111;
  --text-secondary: #555555;
  --text-muted: #888888;
  --accent: #111111;
  --accent-bg: rgba(17, 17, 17, 0.04);
  --border: #e8e8e8;
  --border-hover: #cccccc;
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
  --radius: 12px;
  --radius-lg: 16px;
  --nav-height: 64px;
  --section-gap: 2rem;
  --max-width: 960px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* dark mode colors */
body.dark-mode {
  --bg: #0a0a0a;
  --bg-nav: rgba(10, 10, 10, 0.92);
  --bg-card: #141414;
  --bg-subtle: #1a1a1a;
  --text: #eeeeee;
  --text-secondary: #aaaaaa;
  --text-muted: #777777;
  --accent: #eeeeee;
  --accent-bg: rgba(238, 238, 238, 0.06);
  --border: #222222;
  --border-hover: #444444;
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.4);
}


/* ---- reset ---- */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background 0.4s, color 0.4s;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--text);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

a:hover {
  opacity: 0.7;
}

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

/* custom scrollbar - looks nicer than default */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 99px;
}

::selection {
  background: var(--text);
  color: var(--bg);
}


/* ---- navigation ---- */

nav#desktop-nav,
nav#hamburger-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  background: var(--bg-nav);
  backdrop-filter: blur(24px) saturate(1.3);
  -webkit-backdrop-filter: blur(24px) saturate(1.3);
  z-index: 1000;
  transition: background 0.4s, box-shadow 0.4s;
}

/* shadow when you scroll down a bit */
nav#desktop-nav.scrolled,
nav#hamburger-nav.scrolled {
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

.logo {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: var(--text);
  text-decoration: none;
  user-select: none;
  transition: opacity var(--transition);
}

.logo-dot {
  color: var(--text-muted);
}

.logo:hover {
  color: var(--text);
  text-decoration: none;
  opacity: 0.7;
}

/* pill-shaped nav links container */
.nav-link ul {
  list-style: none;
  display: flex;
  gap: 0.25rem;
  font-size: 0.85rem;
  font-weight: 450;
  letter-spacing: 0.1px;
  background: var(--bg-subtle);
  padding: 4px;
  border-radius: 99px;
}

.nav-link ul li a {
  position: relative;
  padding: 0.4rem 0.9rem;
  border-radius: 99px;
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
  display: block;
}

.nav-link ul li a:hover {
  color: var(--text);
  background: var(--bg-card);
  text-decoration: none;
  opacity: 1;
}

/* currently active section link */
.nav-link ul li a.active-link {
  color: var(--text);
  background: var(--bg-card);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

/* dark/light mode toggle button */
#theme-toggle {
  background: var(--bg-subtle);
  border: none;
  border-radius: 99px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

#theme-toggle:hover {
  background: var(--border);
  transform: rotate(15deg);
}

#theme-icon {
  width: 16px;
  height: 16px;
  transition: filter 0.3s;
}

body.dark-mode #theme-icon,
body.dark-mode #theme-icon-mobile {
  filter: invert(1);
}

/* mobile theme toggle */
#theme-toggle-mobile {
  background: var(--bg-subtle);
  border: none;
  border-radius: 99px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

#theme-toggle-mobile:hover {
  background: var(--border);
  transform: rotate(15deg);
}

#theme-toggle-mobile img {
  width: 16px;
  height: 16px;
  transition: filter 0.3s;
}


/* ---- hamburger menu (mobile) ---- */

#hamburger-nav {
  display: none;
}

.hamburger-menu {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.hamburger-icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 16px;
  width: 22px;
  cursor: pointer;
  padding: 0.5rem;
  box-sizing: content-box;
}

.hamburger-icon span {
  width: 100%;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease-in-out;
}

/* x animation when menu is open */
.hamburger-icon.open span:first-child {
  transform: rotate(45deg) translate(4px, 4px);
}
.hamburger-icon.open span:nth-child(2) {
  opacity: 0;
}
.hamburger-icon.open span:last-child {
  transform: rotate(-45deg) translate(4px, -4px);
}

/* dropdown menu */
.menu-links {
  position: absolute;
  top: calc(100% + 0.75rem);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 180px;
  max-height: 0;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: max-height 0.35s ease;
  z-index: 999;
}

.menu-links.open {
  max-height: 320px;
}

.menu-links li {
  list-style: none;
}

.menu-links a {
  display: block;
  padding: 0.85rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: color 0.2s;
}

.menu-links a:hover {
  color: var(--text);
  text-decoration: none;
  opacity: 1;
}


/* ---- sections (general) ---- */

section {
  padding: var(--section-gap) clamp(1.5rem, 6vw, 4rem) 0;
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* first section needs extra top padding for the fixed nav */
section:first-of-type {
  padding-top: calc(var(--nav-height) + 1rem);
  min-height: 100vh;
  min-height: 100dvh;
  justify-content: center;
}

.section-header {
  margin-bottom: 1rem;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.2;
  color: var(--text);
}


/* ---- hero / profile section ---- */

#profile {
  text-align: center;
  gap: 0;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.hero-avatar img {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  transition: transform 0.5s;
}

.hero-avatar img:hover {
  transform: scale(1.05);
}

.hero-headline {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--text);
  max-width: 700px;
}

.hero-accent {
  color: var(--text-muted);
  font-weight: 700;
}

/* blinking cursor for typing effect */
.cursor {
  display: inline-block;
  animation: blink 0.75s steps(1) infinite;
  color: var(--text-muted);
  font-weight: 300;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-sub {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 480px;
  text-align: center;
}

/* the little info card with experience & education */
.hero-info-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.hero-info-block {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  text-align: left;
}

.hero-info-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-info-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.hero-info-divider {
  width: 1px;
  height: 32px;
  background: var(--border);
}

/* buttons row */
.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* social icons row */
.hero-socials {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
}

.hero-socials a {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  transition: border-color var(--transition), background var(--transition);
}

.hero-socials a:hover {
  border-color: var(--border-hover);
  background: var(--accent-bg);
  opacity: 1;
}

.icon {
  height: 1.15rem;
  width: auto;
  cursor: pointer;
  transition: filter 0.3s;
}

body.dark-mode .icon {
  filter: invert(1) brightness(1.2);
}

/* small scroll down arrow at the bottom of hero */
.scroll-indicator {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  text-decoration: none;
  opacity: 0.3;
  transition: opacity var(--transition);
  color: var(--text-muted);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scroll-indicator svg {
  stroke: var(--text-muted);
}

.scroll-indicator:hover {
  opacity: 0.6;
}


/* ---- buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: inherit;
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.7rem 1.5rem;
  border-radius: 99px;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  letter-spacing: 0.1px;
}

.btn svg {
  flex-shrink: 0;
}

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

.btn-primary:hover {
  opacity: 0.85;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--border-hover);
  color: var(--text);
}


/* ---- about section ---- */

.about-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.about-image img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.about-text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.text-link {
  color: var(--text);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border);
  transition: text-decoration-color var(--transition);
}

.text-link:hover {
  text-decoration-color: var(--text);
  opacity: 1;
}

/* stat cards below about text */
.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.stat-item {
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: border-color var(--transition);
}

.stat-item:hover {
  border-color: var(--border-hover);
}

.stat-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
  margin-bottom: 0.2rem;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}


/* ---- skills section ---- */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.skill-category {
  padding: 1.25rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: border-color var(--transition);
}

.skill-category:hover {
  border-color: var(--border-hover);
}

.skill-heading {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

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

.skill-tag {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border-radius: 99px;
  transition: all var(--transition);
  cursor: default;
}

.skill-tag:hover {
  background: var(--accent-bg);
  color: var(--text);
}


/* ---- projects section ---- */

.projects-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.project-row {
  display: grid;
  grid-template-columns: 40px 80px 1fr 24px;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  transition: opacity var(--transition);
}

.project-row:first-child {
  border-top: 1px solid var(--border);
}

.project-row:hover {
  opacity: 1;
  text-decoration: none;
}

.project-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.project-img-wrapper {
  width: 80px;
  height: 56px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.project-row:hover .project-img {
  transform: scale(1.08);
}

.project-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.project-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.project-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.project-tech {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 0.2rem;
}

.project-tech span {
  font-size: 0.7rem;
  font-weight: 500;
  font-family: 'JetBrains Mono', monospace;
  padding: 0.2rem 0.55rem;
  background: var(--bg-subtle);
  border-radius: 4px;
  color: var(--text-muted);
}

/* little arrow icon on each project row */
.project-arrow {
  display: grid;
  place-items: center;
  color: var(--text-muted);
  transition: transform var(--transition), color var(--transition);
}

.project-row:hover .project-arrow {
  transform: translate(3px, -3px);
  color: var(--text);
}


/* ---- contact section ---- */

#contact {
  padding-bottom: 1.5rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.contact-block {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition);
}

.contact-block:hover {
  border-color: var(--border-hover);
  text-decoration: none;
  opacity: 1;
}

.contact-icon {
  color: var(--text-muted);
}

.contact-icon svg {
  stroke: var(--text-muted);
}

.contact-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.contact-value {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  word-break: break-all;
}


/* ---- footer ---- */

footer {
  border-top: 1px solid var(--border);
  padding: 1rem clamp(1.5rem, 5vw, 4rem);
  background: var(--bg);
  transition: background 0.4s, border-color 0.4s;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.footer-nav {
  display: flex;
  gap: 2rem;
}

.footer-nav a {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--text);
  opacity: 1;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
}


/* ---- scroll reveal animations ---- */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-card {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-card.active {
  opacity: 1;
  transform: translateY(0);
}

/* stagger the cards a little */
.reveal-card:nth-child(2) { transition-delay: 0.08s; }
.reveal-card:nth-child(3) { transition-delay: 0.16s; }
.reveal-card:nth-child(4) { transition-delay: 0.24s; }