/* ============================================================
   ASHUTOSH — Developer Portfolio
   Design System & Styles
   ============================================================ */

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

:root {
  /* Palette */
  --bg:            #05070D;
  --bg-elevated:   #0A0E1A;
  --bg-card:       #0C1120;
  --primary:       #2F7BFF;
  --primary-dim:   rgba(47, 123, 255, 0.12);
  --primary-glow:  rgba(47, 123, 255, 0.08);
  --secondary:     #00C3FF;
  --text:          #F4F7FF;
  --text-secondary:#929BAF;
  --text-dim:      #5A6378;
  --border:        rgba(47, 123, 255, 0.08);
  --border-hover:  rgba(47, 123, 255, 0.2);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;

  /* Sizing */
  --container: 1120px;
  --nav-height: 64px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 0.2s;
  --duration-mid:  0.4s;
  --duration-slow: 0.8s;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

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

ul, ol {
  list-style: none;
}

/* --- Focus States (Accessibility) --- */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  padding: 8px 16px;
  background: var(--primary);
  color: var(--text);
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  z-index: 1000;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 16px;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 40px;
  }
}

@media (min-width: 1200px) {
  .container {
    padding: 0 24px;
  }
}


/* ============================================================
   NAVIGATION
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  transition: background var(--duration-mid) var(--ease-smooth),
              border-color var(--duration-mid) var(--ease-smooth),
              backdrop-filter var(--duration-mid) var(--ease-smooth);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(5, 7, 13, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: opacity var(--duration-fast);
}

.nav__logo:hover {
  opacity: 0.8;
}

/* Desktop links */
.nav__links {
  display: none;
  align-items: center;
  gap: 32px;
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color var(--duration-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--primary);
  transition: width var(--duration-mid) var(--ease-out);
}

.nav__link:hover {
  color: var(--text);
}

.nav__link:hover::after {
  width: 100%;
}

/* Mobile toggle */
.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 5px;
  cursor: pointer;
}

@media (min-width: 768px) {
  .nav__toggle {
    display: none;
  }
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--duration-mid) var(--ease-out),
              opacity var(--duration-fast);
}

.nav__toggle.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile menu */
.nav__mobile {
  position: fixed;
  inset: 0;
  top: var(--nav-height);
  background: rgba(5, 7, 13, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 40px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-mid) var(--ease-smooth),
              visibility var(--duration-mid);
  z-index: 99;
}

.nav__mobile.open {
  opacity: 1;
  visibility: visible;
}

.nav__mobile a {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

.nav__mobile a:hover {
  color: var(--text);
}


/* ============================================================
   HERO
   ============================================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 120px 0 80px;
}

/* Background layers */
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero__glow {
  position: absolute;
  width: 800px;
  height: 800px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  background: radial-gradient(
    ellipse at center,
    rgba(47, 123, 255, 0.06) 0%,
    rgba(0, 195, 255, 0.02) 40%,
    transparent 70%
  );
  animation: glowPulse 8s ease-in-out infinite;
  opacity: 0;
}

@keyframes glowPulse {
  0%, 100% { transform: translate(-50%, -55%) scale(1); opacity: 0.6; }
  50%      { transform: translate(-50%, -55%) scale(1.08); opacity: 1; }
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(47, 123, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 123, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 80%);
}

.hero__particles {
  position: absolute;
  inset: 0;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--primary);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat linear infinite;
}

@keyframes particleFloat {
  0%   { opacity: 0; transform: translateY(0); }
  10%  { opacity: 0.4; }
  90%  { opacity: 0.4; }
  100% { opacity: 0; transform: translateY(-120px); }
}

/* Hero content */
.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  opacity: 0;
  transform: translateY(16px);
}

.hero__status-dot {
  width: 6px;
  height: 6px;
  background: #22C55E;
  border-radius: 50%;
  animation: dotPulse 2.5s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
  50%      { opacity: 0.7; box-shadow: 0 0 0 4px rgba(34, 197, 94, 0); }
}

.hero__name {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 16px;
  color: var(--text);
}

.hero__name .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  background: linear-gradient(135deg, var(--text) 0%, rgba(244, 247, 255, 0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__tagline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 400;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(16px);
}

.hero__description {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(16px);
}

/* Terminal element */
.hero__terminal {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: rgba(10, 14, 26, 0.7);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-dim);
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(16px);
}

.hero__terminal-prompt {
  color: var(--primary);
  user-select: none;
}

.hero__terminal-text {
  color: var(--text-secondary);
}

.hero__terminal-cursor {
  display: inline-block;
  width: 7px;
  height: 15px;
  background: var(--primary);
  opacity: 0.7;
  animation: cursorBlink 1.2s step-end infinite;
  vertical-align: text-bottom;
}

@keyframes cursorBlink {
  0%, 100% { opacity: 0.7; }
  50%      { opacity: 0; }
}

/* CTA buttons */
.hero__actions {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  opacity: 0;
  transform: translateY(16px);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--primary);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 8px;
  transition: background var(--duration-fast),
              transform var(--duration-fast),
              box-shadow var(--duration-mid);
}

.btn-primary:hover {
  background: #3d87ff;
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(47, 123, 255, 0.25);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

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

.btn-secondary .arrow {
  transition: transform var(--duration-fast) var(--ease-out);
  display: inline-block;
}

.btn-secondary:hover .arrow {
  transform: translateX(3px);
}

/* Social links */
.hero__socials {
  display: flex;
  align-items: center;
  gap: 16px;
  opacity: 0;
  transform: translateY(16px);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  transition: color var(--duration-fast),
              border-color var(--duration-fast),
              background var(--duration-fast);
}

.social-link:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--primary-glow);
}

.social-link svg {
  width: 18px;
  height: 18px;
}


/* ============================================================
   SECTION SHARED
   ============================================================ */

.section {
  padding: 120px 0;
  position: relative;
}

@media (max-width: 767px) {
  .section {
    padding: 80px 0;
  }
}

.section__label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section__heading {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--text);
}

.section__divider {
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, var(--primary) 0%, transparent 100%);
  margin-bottom: 48px;
}


/* ============================================================
   ABOUT
   ============================================================ */

.about__content {
  max-width: 640px;
}

.about__text {
  font-size: clamp(1.0625rem, 2vw, 1.1875rem);
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

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

/* Reveal animation target */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

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


/* ============================================================
   PROJECTS
   ============================================================ */

.projects__grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Featured card spans full width */
.project-card--featured {
  grid-column: 1 / -1;
}

/* Base card */
.project-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  transition: transform var(--duration-mid) var(--ease-out),
              border-color var(--duration-mid),
              box-shadow var(--duration-mid);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: 0 16px 48px rgba(47, 123, 255, 0.06);
}

/* Featured card layout */
@media (min-width: 768px) {
  .project-card--featured {
    flex-direction: row;
    gap: 48px;
    padding: 40px;
  }
}

.project-card__preview {
  flex-shrink: 0;
  margin-bottom: 24px;
}

@media (min-width: 768px) {
  .project-card--featured .project-card__preview {
    width: 320px;
    margin-bottom: 0;
  }
}

.project-card__info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card__name {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--text);
}

.project-card--featured .project-card__name {
  font-size: 1.5rem;
}

.project-card__desc {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

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

.project-card__feature {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--primary-dim);
  color: var(--primary);
  border-radius: 4px;
  font-weight: 500;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.project-card__tech span {
  font-size: 0.75rem;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dim);
  font-weight: 400;
}

.project-card__links {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: auto;
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

.project-card__link:hover {
  color: var(--primary);
}

.project-card__link .arrow {
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease-out);
}

.project-card__link:hover .arrow {
  transform: translateX(3px);
}

/* Stagger for cards */
.project-card.reveal:nth-child(2) { transition-delay: 0.1s; }
.project-card.reveal:nth-child(3) { transition-delay: 0.2s; }
.project-card.reveal:nth-child(4) { transition-delay: 0.3s; }
.project-card.reveal:nth-child(5) { transition-delay: 0.4s; }

/* --- Flip Clock Preview (CSS-only) --- */
.flip-clock-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 40px 24px;
  background: linear-gradient(135deg, rgba(10, 14, 26, 0.9) 0%, rgba(15, 20, 35, 0.9) 100%);
  border: 1px solid var(--border);
  border-radius: 10px;
  height: 100%;
  min-height: 180px;
}

.flip-digit {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 72px;
  background: linear-gradient(180deg, #111827 0%, #0D1117 50%, #111827 100%);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  position: relative;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  overflow: hidden;
}

.flip-digit::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: rgba(0, 0, 0, 0.5);
}

.flip-separator {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  animation: separatorBlink 1.5s ease-in-out infinite;
  margin: 0 2px;
}

@keyframes separatorBlink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.3; }
}


/* ============================================================
   WRITING
   ============================================================ */

.writing__content {
  max-width: 540px;
}

.writing__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.writing__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  padding: 14px 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color var(--duration-fast),
              background var(--duration-fast);
}

.writing__link:hover {
  border-color: var(--border-hover);
  background: var(--primary-glow);
}

.writing__link .arrow {
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease-out);
}

.writing__link:hover .arrow {
  transform: translateX(4px);
}


/* ============================================================
   CONTACT
   ============================================================ */

.contact__content {
  max-width: 560px;
}

.contact__desc {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 40px;
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact__link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  padding: 14px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: color var(--duration-fast),
              border-color var(--duration-fast),
              background var(--duration-fast);
  width: fit-content;
}

.contact__link:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--primary-glow);
}

.contact__link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.contact__link .arrow {
  margin-left: auto;
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease-out);
  color: var(--text-dim);
}

.contact__link:hover .arrow {
  transform: translateX(3px);
  color: var(--text-secondary);
}


/* ============================================================
   FOOTER
   ============================================================ */

.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__text {
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.footer__links {
  display: flex;
  gap: 20px;
}

.footer__link {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  transition: color var(--duration-fast);
}

.footer__link:hover {
  color: var(--text-secondary);
}

.footer__link svg {
  width: 16px;
  height: 16px;
}


/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero__name .char {
    opacity: 1;
    transform: none;
  }

  .hero__status,
  .hero__tagline,
  .hero__description,
  .hero__terminal,
  .hero__actions,
  .hero__socials {
    opacity: 1;
    transform: none;
  }

  .hero__glow {
    opacity: 0.6;
  }

  .particle {
    display: none;
  }
}


/* ============================================================
   SCROLLBAR
   ============================================================ */

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: rgba(47, 123, 255, 0.15);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(47, 123, 255, 0.25);
}