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

:root {
  --font-mono: "Fira Code", monospace;
  --font-sans: "Roboto", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;

  --color-bg: #050816;
  --color-bg-elevated: #1f2233;
  --color-bg-soft: #101324;
  --color-border: #272a3b;

  --color-text: #f5f5f7;
  --color-text-muted: #9ca3af;

  --color-accent-1: #00cfff;
  --color-accent-2: #00ff00;
  --color-danger: #ff4b81;

  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.5);
  --shadow-glow-accent: 0 0 20px rgba(0, 207, 255, 0.6);

  --radius-lg: 18px;
  --radius-full: 999px;

  --transition-fast: 180ms ease-out;
  --transition-med: 260ms ease;

  scroll-behavior: smooth;
}

body[data-theme="light"] {
  --color-bg: #f4f5fb;
  --color-bg-elevated: #ffffff;
  --color-bg-soft: #e7e9f4;
  --color-border: #d0d4e6;

  --color-text: #050816;
  --color-text-muted: #4b5563;

  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.1);
  --shadow-glow-accent: 0 0 16px rgba(0, 207, 255, 0.4);
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top, #111827 0, var(--color-bg) 42%),
    #020617;
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

/* =========================
   Layout Helpers
   ========================= */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 5.5rem 0;
}

.section-title {
  font-size: clamp(2rem, 2.4vw, 2.4rem);
  margin: 0 0 0.5rem;
  letter-spacing: 0.04em;
}

.section-subtitle {
  margin: 0 0 2.5rem;
  color: var(--color-text-muted);
  max-width: 38rem;
}

/* =========================
   Header
   ========================= */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(
      to bottom,
      rgba(5, 8, 22, 0.9),
      rgba(5, 8, 22, 0.6),
      transparent
    );
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.logo-mark {
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(0, 207, 255, 0.7);
  background: radial-gradient(circle at top, rgba(0, 207, 255, 0.25), transparent);
  box-shadow: 0 0 22px rgba(0, 207, 255, 0.4);
  color: var(--color-accent-1);
}

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

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  font-size: 0.9rem;
}

.nav-link {
  position: relative;
  padding: 0.25rem 0;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent-1), var(--color-accent-2));
  transition: width var(--transition-med);
}

.nav-link:hover {
  color: var(--color-accent-1);
}

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

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: radial-gradient(
    circle at top,
    rgba(0, 207, 255, 0.2),
    transparent
  );
  width: 40px;
  height: 28px;
  cursor: pointer;
  color: var(--color-text);
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-accent-1);
  box-shadow: 0 0 20px rgba(0, 207, 255, 0.45);
  transform: translateY(-1px);
}

/* =========================
   Hero
   ========================= */
.hero {
  padding: 5rem 0 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.1fr);
  gap: 3.5rem;
  align-items: center;
}

.hero-text {
  max-width: 34rem;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-accent-1);
  margin: 0 0 0.6rem;
}

.hero-title {
  font-size: clamp(2.6rem, 4vw, 3.1rem);
  line-height: 1.06;
  margin: 0 0 0.85rem;
}

.hero-subtitle {
  margin: 0 0 1.9rem;
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

/* Buttons */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    background-position 220ms ease-out;
  background-size: 200% 200%;
}

.btn-primary {
  background-image: linear-gradient(
    120deg,
    rgba(0, 207, 255, 0.15),
    rgba(0, 255, 0, 0.12)
  );
  border-color: rgba(0, 207, 255, 0.9);
  color: var(--color-text);
  box-shadow: 0 0 0 1px rgba(0, 207, 255, 0.65), var(--shadow-soft);
}

.btn-primary:hover {
  transform: translateY(-1px) scale(1.01);
  box-shadow: var(--shadow-glow-accent), var(--shadow-soft);
  background-position: 100% 0;
}

.btn-ghost {
  border-color: rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.6);
  color: var(--color-text-muted);
}

body[data-theme="light"] .btn-ghost {
  background: #ffffff;
}

.btn-ghost:hover {
  transform: translateY(-1px);
  border-color: var(--color-accent-1);
  box-shadow: 0 0 18px rgba(148, 163, 184, 0.3);
}

.btn-full {
  width: 100%;
}

/* Terminal */
.hero-terminal-wrapper {
  position: relative;
}

.terminal {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  background: radial-gradient(circle at top, #020617, #02031b 36%, #020617);
  border: 1px solid rgba(148, 163, 184, 0.55);
  box-shadow: 0 22px 55px rgba(15, 23, 42, 0.9), var(--shadow-glow-accent);
  transform-origin: center;
  transform: perspective(1100px) rotateY(-9deg) rotateX(3deg);
  animation: terminalFloat 6s ease-in-out infinite alternate;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.85rem;
  border-bottom: 1px solid rgba(15, 23, 42, 0.95);
  background: linear-gradient(
    to right,
    rgba(15, 23, 42, 0.95),
    rgba(22, 30, 47, 0.95)
  );
  font-size: 0.7rem;
  color: var(--color-text-muted);
}

.terminal-header .dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background-color: #4b5563;
}

.terminal-header .dot.red {
  background-color: #ff5f57;
}
.terminal-header .dot.yellow {
  background-color: #febc2e;
}
.terminal-header .dot.green {
  background-color: #28c840;
}

.terminal-title {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.terminal-body {
  position: relative;
  padding: 1.1rem 1.1rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.5;
  background: radial-gradient(circle at top left, #0b1120, #020617 50%);
  color: var(--color-accent-2);
  min-height: 190px;
}

.terminal-text {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-cursor {
  display: inline-block;
  width: 8px;
  height: 1.05em;
  margin-left: 2px;
  background-color: var(--color-accent-2);
  vertical-align: middle;
  animation: cursorBlink 1.1s step-end infinite;
}

/* =========================
   About
   ========================= */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.3fr);
  gap: 3rem;
  align-items: center;
}

.about-photo-wrapper {
  position: relative;
  width: 220px;
  height: 220px;
  margin: 0 auto;
}

.about-photo-glow {
  position: absolute;
  inset: -16px;
  border-radius: 50%;
  background: conic-gradient(
    from 140deg,
    rgba(0, 207, 255, 0.7),
    rgba(0, 255, 0, 0.08),
    rgba(0, 207, 255, 0.7)
  );
  filter: blur(16px);
  opacity: 0.7;
  animation: glowPulse 5s ease-in-out infinite alternate;
}

.about-photo {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(15, 23, 42, 0.9);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.85);
}

.about-content {
  max-width: 36rem;
}

.about-text {
  margin: 0 0 0.9rem;
  color: var(--color-text-muted);
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.7);
  color: var(--color-text-muted);
}

/* =========================
   Projects
   ========================= */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.8rem;
}

.project-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: radial-gradient(circle at top left, #0b1120, var(--color-bg-elevated));
  border: 1px solid rgba(148, 163, 184, 0.5);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.75);
  transition:
    transform var(--transition-med),
    box-shadow var(--transition-med),
    border-color var(--transition-med),
    background-position 220ms ease-out;
  background-size: 180% 180%;
  background-position: 0 0;
  cursor: pointer;
}

.project-card::before {
  content: "";
  position: absolute;
  inset: -40%;
  opacity: 0;
  background: radial-gradient(
    circle at top center,
    rgba(0, 207, 255, 0.35),
    transparent 60%
  );
  transition: opacity var(--transition-med), transform var(--transition-med);
  z-index: 0;
}

.project-card:hover {
  transform: translateY(-8px) translateZ(0) scale(1.01);
  box-shadow: 0 0 26px rgba(0, 207, 255, 0.55), var(--shadow-soft);
  border-color: rgba(0, 207, 255, 0.95);
  background-position: 100% 0;
}

.project-card:hover::before {
  opacity: 1;
  transform: translateY(10px);
}

.project-image-wrapper {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}

.project-image {
  display: block;
  width: 100%;
  height: 180px;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform var(--transition-med), filter var(--transition-med);
}

.project-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 180px;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: rgba(148, 163, 184, 0.9);
  background: radial-gradient(circle at top, #020617, #020617 55%, #020617);
}

.project-image-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at top,
    rgba(0, 207, 255, 0.08),
    transparent 55%
  );
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity var(--transition-med);
}

.project-card:hover .project-image {
  transform: scale(1.08);
  filter: saturate(1.1);
}

.project-card:hover .project-image-overlay {
  opacity: 1;
}

.project-body {
  position: relative;
  padding: 1.1rem 1rem 1.2rem;
  z-index: 1;
}

.project-title {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.project-description {
  margin: 0 0 0.9rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.8rem;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.7);
  color: var(--color-text-muted);
}

.project-actions {
  display: flex;
  justify-content: flex-end;
}

.project-link {
  position: relative;
  font-size: 0.86rem;
  font-family: var(--font-mono);
  text-decoration: none;
  color: var(--color-accent-1);
  padding-bottom: 0.1rem;
}

.project-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.05rem;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent-1), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-med);
}

.project-card:hover .project-link::after {
  transform: scaleX(1);
}

/* =========================
   Contact
   ========================= */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.1fr);
  gap: 2.5rem;
  align-items: start;
}

.contact-info {
  max-width: 30rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.contact-list li + li {
  margin-top: 0.5rem;
}

.contact-label {
  display: inline-block;
  min-width: 70px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent-1);
}

.contact-form {
  padding: 1.4rem 1.5rem 1.6rem;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top, #020617, var(--color-bg-soft));
  border: 1px solid rgba(148, 163, 184, 0.5);
  box-shadow: var(--shadow-soft);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: rgba(15, 23, 42, 0.9);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  outline: none;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

body[data-theme="light"] .form-group input,
body[data-theme="light"] .form-group textarea {
  background: #ffffff;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(148, 163, 184, 0.8);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent-1);
  box-shadow: 0 0 0 1px rgba(0, 207, 255, 0.7);
  transform: translateY(-1px);
}

.form-feedback {
  margin-top: 0.7rem;
  font-size: 0.85rem;
  min-height: 1.1em;
  color: var(--color-text-muted);
}

.form-feedback--success {
  color: var(--color-accent-2);
}

.form-feedback--error {
  color: var(--color-danger);
}

/* =========================
   Footer
   ========================= */
.footer {
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  padding: 1.4rem 0 1.6rem;
  margin-top: 3rem;
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.9), #020617);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-meta {
  opacity: 0.85;
}

/* =========================
   Animations
   ========================= */
@keyframes cursorBlink {
  0%,
  45% {
    opacity: 1;
  }
  55%,
  100% {
    opacity: 0;
  }
}

@keyframes terminalFloat {
  0% {
    transform: perspective(1100px) rotateY(-9deg) rotateX(3deg) translateY(0);
  }
  100% {
    transform: perspective(1100px) rotateY(-5deg) rotateX(4deg) translateY(-8px);
  }
}

@keyframes glowPulse {
  0% {
    opacity: 0.45;
    transform: scale(0.96);
  }
  100% {
    opacity: 0.9;
    transform: scale(1.03);
  }
}

/* =========================
   Responsive
   ========================= */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-terminal-wrapper {
    order: -1;
  }

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

  .projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .header-inner {
    gap: 0.75rem;
  }

  .nav {
    gap: 1rem;
    font-size: 0.85rem;
  }

  .hero {
    padding-top: 4.2rem;
  }

  .section {
    padding: 4rem 0;
  }

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

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  .nav {
    display: none;
  }

  .header-inner {
    justify-content: space-between;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-terminal-wrapper {
    transform: scale(0.96);
    transform-origin: center;
  }

  .about-photo-wrapper {
    width: 190px;
    height: 190px;
  }
}