/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  --color-bg: #000000;
  --color-bg-alt: #0a0a0a;
  --color-surface: #141414;
  --color-primary: #ffffff;
  --color-primary-hover: #d4d4d4;
  --color-accent: #ff0000;
  --color-text: #a0a0a0;
  --color-text-muted: #606060;
  --color-heading: #ffffff;
  --color-border: #1e1e1e;
  --color-card: #0a0a0a;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --max-width: 1100px;
  --nav-height: 64px;
  --radius: 2px;
  --transition: 0.3s ease;
}

/* ===========================
   Reset & Base
   =========================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.3px;
}

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

a:hover {
  color: var(--color-accent);
}

ul {
  list-style: none;
}

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

/* ===========================
   Navigation
   =========================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.nav--scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.nav__container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-mono);
  letter-spacing: 3px;
  text-transform: uppercase;
}

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

.nav__links {
  display: flex;
  gap: 2rem;
}

.nav__links a {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 400;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  position: relative;
  padding: 0.25rem 0;
}

.nav__links a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.nav__links a:hover {
  color: var(--color-accent);
}

.nav__links a:hover::after {
  width: 100%;
  background: var(--color-accent);
}

/* Mobile Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===========================
   Buttons
   =========================== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 400;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

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

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

.btn--outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn--outline:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

/* ===========================
   Hero
   =========================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + 2rem) 1.5rem 4rem;
}

.hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
}

.hero__content {
  flex: 1;
  min-width: 0;
}

.hero__avatar {
  flex-shrink: 0;
  width: 200px;
  height: 200px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero__avatar svg {
  width: 100%;
  height: 100%;
}

.hero__greeting {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.hero__name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  font-family: var(--font-mono);
  color: var(--color-heading);
  line-height: 1.1;
  margin-bottom: 0.5rem;
  letter-spacing: -1px;
}

.hero__title {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--color-text-muted);
  font-weight: 400;
  font-family: var(--font-mono);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero__summary {
  max-width: 560px;
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ===========================
   Sections
   =========================== */
.section {
  padding: 5rem 1.5rem;
}

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

.section__container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__container--narrow {
  max-width: 640px;
  text-align: center;
}

.section__heading {
  font-size: 1.5rem;
  font-weight: 400;
  font-family: var(--font-mono);
  color: var(--color-heading);
  text-transform: uppercase;
  letter-spacing: 4px;
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
}

.section__heading::after {
  content: "";
  display: block;
  width: 40px;
  height: 1px;
  background: var(--color-accent);
  margin-top: 0.75rem;
}

.section__container--narrow .section__heading::after {
  margin-left: auto;
  margin-right: auto;
}

/* ===========================
   About
   =========================== */
.about__content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 720px;
  font-size: 1.05rem;
}

/* ===========================
   Timeline (Experience)
   =========================== */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline__item {
  position: relative;
  margin-bottom: 3rem;
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__marker {
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-text-muted);
  z-index: 1;
}

.timeline__item:first-child .timeline__marker {
  border-color: var(--color-accent);
  background: var(--color-accent);
}

.timeline__content {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--transition);
}

.timeline__content:hover {
  border-color: var(--color-accent);
}

.timeline__logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 0.75rem;
  float: right;
  margin-left: 1rem;
}

.timeline__logo svg,
.timeline__logo img {
  width: 100%;
  height: 100%;
  display: block;
}

.timeline__role {
  font-size: 1.1rem;
  font-weight: 400;
  font-family: var(--font-mono);
  color: var(--color-heading);
  margin-bottom: 0.25rem;
  letter-spacing: 0.5px;
}

.timeline__company {
  font-size: 0.9rem;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.timeline__period {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  font-family: var(--font-mono);
}

.timeline__details {
  list-style: disc;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--color-text);
}

.timeline__tags {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ===========================
   Tags
   =========================== */
.tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 0;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===========================
   Project Cards
   =========================== */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), background-color var(--transition);
  overflow: hidden;
}

.card:hover {
  border-color: var(--color-accent);
  background-color: var(--color-surface);
}

.card__image {
  width: 100%;
  aspect-ratio: 2 / 1;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.card__image svg,
.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card__header {
  margin-bottom: 1rem;
  padding: 1.75rem 1.75rem 0;
}

.card__icon {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
}

.card__title {
  font-size: 1.05rem;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--color-heading);
  margin-bottom: 0.75rem;
  letter-spacing: 0.5px;
  padding: 1rem 1.75rem 0;
}

.card__description {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  flex-grow: 1;
  margin-bottom: 1rem;
  padding: 0 1.75rem;
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0 1.75rem 1.75rem;
}

/* ===========================
   Skills
   =========================== */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.skills__group {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.skills__group-title {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--color-heading);
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 2px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.75rem;
}

.skills__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.skills__list li {
  font-size: 0.95rem;
  color: var(--color-text);
  padding-left: 1rem;
  position: relative;
}

.skills__list li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

/* ===========================
   Education
   =========================== */
.education__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.education__item,
.education__certs {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.education__degree {
  font-size: 1rem;
  font-weight: 400;
  font-family: var(--font-mono);
  color: var(--color-heading);
  margin-bottom: 0.5rem;
  letter-spacing: 0.5px;
}

.education__school {
  color: var(--color-text);
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.education__period {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.education__cert-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.education__cert-list li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.education__cert-issuer {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

/* ===========================
   Contact
   =========================== */
.contact__text {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.contact__links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===========================
   Footer
   =========================== */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  text-align: center;
}

.footer__container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  letter-spacing: 1px;
}

/* ===========================
   Mr. Robot Touches
   =========================== */

/* Blinking cursor on hero greeting */
.hero__greeting::after {
  content: "_";
  animation: blink 1s step-end infinite;
  color: var(--color-accent);
  margin-left: 2px;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Subtle CRT scanline overlay */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
}

/* Selection color */
::selection {
  background: var(--color-accent);
  color: #ffffff;
}

/* ===========================
   Animations
   =========================== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in--visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    flex-direction: column;
    background: rgba(0, 0, 0, 0.97);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 2rem 1.5rem;
    gap: 1.25rem;
    transform: translateY(-120%);
    transition: transform var(--transition);
    border-bottom: 1px solid var(--color-border);
  }

  .nav__links--open {
    transform: translateY(0);
  }

  .nav__toggle {
    display: flex;
  }

  .education__grid {
    grid-template-columns: 1fr;
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }

  .hero__name {
    font-size: 2.5rem;
  }

  .hero__inner {
    flex-direction: column-reverse;
    text-align: center;
  }

  .hero__avatar {
    width: 150px;
    height: 150px;
  }

  .hero__actions {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 3.5rem 1rem;
  }

  .timeline {
    padding-left: 1.5rem;
  }

  .timeline__content {
    padding: 1.25rem;
  }

  .skills__grid {
    grid-template-columns: 1fr;
  }
}