/* ============================================
   RITHWICK REDDY — PORTFOLIO STYLES
   ============================================ */

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

/* ── DARK THEME (default) ── */
:root,
[data-theme="dark"] {
  --bg:       #0a0a0a;
  --surface:  #111111;
  --border:   #222222;
  --accent:   #c8ff00;
  --accent2:  #ff6b35;
  --text:     #f0f0f0;
  --muted:    #666666;
  --card:     #141414;
  --nav-bg:   rgba(10, 10, 10, 0.88);
  --outline-stroke: #f0f0f0;
  --about-p:  #aaaaaa;
  --project-hover-bg: #181818;
}

/* ── LIGHT THEME ── */
[data-theme="light"] {
  --bg:       #f4f4ee;
  --surface:  #eaeae3;
  --border:   #d0d0c8;
  --accent:   #7ab800;
  --accent2:  #e05a1e;
  --text:     #0e0e0e;
  --muted:    #777777;
  --card:     #ffffff;
  --nav-bg:   rgba(244, 244, 238, 0.9);
  --outline-stroke: #0e0e0e;
  --about-p:  #555555;
  --project-hover-bg: #f8f8f3;
}

/* ── Theme Transition ── */
html {
  scroll-behavior: smooth;
}

body,
nav,
.project-card,
.stat-box,
.exp-card,
.skill-chip,
.contact-link,
footer {
  transition:
    background-color 0.35s ease,
    border-color 0.35s ease,
    color 0.35s ease;
}

/* ── Body ── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── Noise overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.3;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

/* ── Utility ── */
.accent-text { color: var(--accent); }

/* ============================================
   NAV
   ============================================ */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 4rem;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: var(--accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

.nav-right {
  display: flex;
  align-items: center;
  gap: 2rem;
}

/* ── Theme Toggle Button ── */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.45rem 0.9rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.25s ease;
  outline: none;
}

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

.theme-icon {
  display: flex;
  align-items: center;
  transition: opacity 0.2s, transform 0.3s;
}

/* Show moon in dark mode, sun in light mode */
[data-theme="dark"]  .dark-icon  { display: flex; }
[data-theme="dark"]  .light-icon { display: none; }
[data-theme="light"] .dark-icon  { display: none; }
[data-theme="light"] .light-icon { display: flex; }



/* ============================================
   HERO
   ============================================ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 4rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,255,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,255,0,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  transition: opacity 0.35s;
}

[data-theme="light"] .hero-grid-bg {
  background-image:
    linear-gradient(rgba(0,0,0,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.06) 1px, transparent 1px);
}

.hero-glow {
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200,255,0,0.08) 0%, transparent 70%);
  top: -100px; right: -100px;
  pointer-events: none;
}

.hero-glow2 {
  position: absolute;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,107,53,0.06) 0%, transparent 70%);
  bottom: 0; left: -100px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(200,255,0,0.08);
  border: 1px solid rgba(200,255,0,0.2);
  color: var(--accent);
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.4rem 1rem;
  border-radius: 2px;
  margin-bottom: 2rem;
  animation: fadeUp 0.6s ease both;
}

.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

h1 {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(3.5rem, 8vw, 7rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  animation: fadeUp 0.6s 0.1s ease both;
}

h1 .outline {
  -webkit-text-stroke: 2px var(--outline-stroke);
  color: transparent;
}

.hero-tagline {
  font-family: 'DM Sans', sans-serif;
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--muted);
  max-width: 540px;
  margin-bottom: 3rem;
  animation: fadeUp 0.6s 0.2s ease both;
}

.hero-tagline em {
  font-style: italic;
  color: var(--text);
  font-weight: 400;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeUp 0.6s 0.3s ease both;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  padding: 0.85rem 2rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(200,255,0,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  padding: 0.85rem 2rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

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

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 4rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  animation: fadeUp 0.6s 0.5s ease both;
}

.scroll-line {
  width: 40px;
  height: 1px;
  background: var(--muted);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: var(--accent);
  animation: slideLine 2s infinite;
}

/* ============================================
   SECTION COMMON
   ============================================ */
section {
  padding: 6rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
  max-width: 80px;
}

.center-label { justify-content: center; }
.center-label::after { display: none; }

h2 {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 3rem;
}

/* ============================================
   ABOUT
   ============================================ */
#about .about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--about-p);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.2rem;
}

.about-text p strong {
  color: var(--text);
  font-weight: 500;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.stat-box {
  background: var(--card);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.stat-number {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 2.8rem;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-family: 'Space Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ============================================
   SKILLS
   ============================================ */
#skills {
  background: var(--surface);
  padding: 6rem 0;
}

.skills-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 4rem;
}

.skills-categories {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.skill-category-title {
  font-family: 'Space Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent2);
  margin-bottom: 1rem;
}

.skills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.skill-chip {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 1.1rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  transition: all 0.25s ease;
  cursor: default;
  position: relative;
  overflow: hidden;
}

.skill-chip::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateX(-100%);
  transition: transform 0.3s;
  z-index: 0;
}

.skill-chip:hover::before { transform: translateX(0); }
.skill-chip:hover { color: #0a0a0a; border-color: var(--accent); }
.skill-chip span { position: relative; z-index: 1; }

/* ============================================
   PROJECTS
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.project-card {
  background: var(--card);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  overflow: hidden;
}

.project-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 0;
  background: var(--accent);
  transition: height 0.4s;
}

.project-card:hover { background: var(--project-hover-bg); }
.project-card:hover::after { height: 100%; }

.project-num {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.1em;
}

.project-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.4rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.project-desc {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.7;
  flex: 1;
}

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

.tag {
  background: rgba(200,255,0,0.07);
  border: 1px solid rgba(200,255,0,0.15);
  color: var(--accent);
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  padding: 0.25rem 0.65rem;
  letter-spacing: 0.05em;
}

[data-theme="light"] .tag {
  background: rgba(100,160,0,0.08);
  border: 1px solid rgba(100,160,0,0.25);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  margin-top: 0.5rem;
  transition: color 0.2s;
}

.project-link:hover { color: var(--accent); }
.project-link svg { transition: transform 0.2s; }
.project-link:hover svg { transform: translate(2px, -2px); }

/* ============================================
   EXPERIENCE
   ============================================ */
#experience {
  background: var(--surface);
  padding: 6rem 0;
}

.exp-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 4rem 2rem;
}

.exp-timeline {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 4rem;
  display: flex;
  flex-direction: column;
  position: relative;
}

.exp-timeline::before {
  content: '';
  position: absolute;
  left: calc(4rem + 12px);
  top: 0; bottom: 0;
  width: 1px;
  background: var(--border);
}

.exp-item {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 2rem;
  padding-bottom: 3rem;
}

.exp-dot {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  position: relative;
  z-index: 1;
  margin-top: 0.2rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.35s;
}

.exp-dot::after {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.exp-card {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 2rem 2.5rem;
}

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.exp-role {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
}

.exp-date {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  background: rgba(200,255,0,0.08);
  padding: 0.3rem 0.7rem;
  border: 1px solid rgba(200,255,0,0.15);
}

[data-theme="light"] .exp-date {
  background: rgba(100,160,0,0.08);
  border-color: rgba(100,160,0,0.25);
}

.exp-company {
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
}

.exp-desc {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ============================================
   CONTACT
   ============================================ */
#contact {
  text-align: center;
  padding: 7rem 4rem;
}

.contact-tagline {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.9rem 1.6rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  transition: all 0.2s;
}

.contact-link:hover {
  background: var(--accent);
  color: #0a0a0a;
  border-color: var(--accent);
}

.contact-email {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: inline-block;
  border-bottom: 3px solid var(--accent);
  padding-bottom: 0.2rem;
  transition: color 0.2s;
}

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

/* ============================================
   FOOTER
   ============================================ */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'Space Mono', monospace;
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.8); }
}

@keyframes slideLine {
  0%   { left: -100%; }
  100% { left: 100%; }
}

/* ── Scroll Reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  nav {
    padding: 1rem 1.5rem;
  }

  .nav-links { display: none; }

  #hero,
  section { padding: 5rem 1.5rem 3rem; }

  #skills,
  #experience { padding: 4rem 0; }

  .skills-inner,
  .exp-inner { padding: 0 1.5rem; }

  .exp-timeline {
    padding: 0 1.5rem;
  }

  .exp-timeline::before {
    left: calc(1.5rem + 12px);
  }

  h1 { font-size: 3rem; }

  #about .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  footer {
    padding: 1.5rem;
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

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

  .theme-label { display: none; }
}