/* NagaraTech — Main Stylesheet */

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

:root {
  /* Colors */
  --clr-bg:        #0d0f14;
  --clr-surface:   #141720;
  --clr-surface-2: #1c2030;
  --clr-border:    rgba(255, 255, 255, 0.08);
  --clr-text:      #e2e8f0;
  --clr-text-muted:#7a8599;
  --clr-accent:    #6366f1;     /* indigo */
  --clr-accent-2:  #818cf8;
  --clr-green:     #34d399;
  --clr-white:     #ffffff;

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

  /* Spacing */
  --section-py: clamp(5rem, 10vw, 8rem);

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --trans: 0.25s var(--ease);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  background-color: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

/* ---------- Utility ---------- */
.container {
  width: min(100%, 1100px);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2rem);
}

.section {
  padding-block: var(--section-py);
}

.section__head {
  text-align: center;
  margin-bottom: 3rem;
}

.section__title {
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.section__desc {
  color: var(--clr-text-muted);
  font-size: 1rem;
}

.highlight {
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--trans);
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--clr-accent);
  color: #fff;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.35);
}

.btn--primary:hover {
  background: var(--clr-accent-2);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.55);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--clr-text);
  border: 1.5px solid var(--clr-border);
}

.btn--ghost:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  transform: translateY(-2px);
}

/* Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--clr-white);
  transition: opacity var(--trans);
}

.nav__logo:hover { opacity: 0.8; }

.logo-bracket {
  color: var(--clr-accent);
}

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

.nav__links a {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  transition: color var(--trans);
  font-weight: 500;
}

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

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: var(--trans);
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100dvh - 4.5rem);
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* Grid background */
.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--clr-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--clr-border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 30%, transparent 100%);
  pointer-events: none;
}

/* Glow */
.hero::after {
  content: '';
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(99, 102, 241, 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  padding-block: 6rem 4rem;
  max-width: 680px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--clr-accent-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.hero__eyebrow::before {
  content: '//';
  opacity: 0.5;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}

.hero__sub {
  font-size: clamp(1rem, 2vw, 1.1rem);
  color: var(--clr-text-muted);
  margin-bottom: 2.5rem;
  max-width: 500px;
  line-height: 1.8;
}

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

/* Scroll hint */
.hero__scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.hero__scroll-hint span {
  display: block;
  width: 1.25rem;
  height: 2rem;
  border: 2px solid var(--clr-border);
  border-radius: 999px;
  position: relative;
  margin: auto;
}

.hero__scroll-hint span::after {
  content: '';
  display: block;
  width: 4px;
  height: 8px;
  background: var(--clr-accent);
  border-radius: 999px;
  position: absolute;
  top: 4px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollDot 1.8s ease-in-out infinite;
}

@keyframes scrollDot {
  0%   { opacity: 1; top: 4px; }
  80%  { opacity: 0; top: 18px; }
  100% { opacity: 0; top: 4px; }
}

/* Apps Grid */
.apps {
  background: var(--clr-surface);
}

.apps__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.app-card {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: 1rem;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color var(--trans), transform var(--trans), box-shadow var(--trans);
  cursor: default;
}

.app-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(99, 102, 241, 0.12);
}

.app-card--placeholder {
  border-style: dashed;
  opacity: 0.6;
}

.app-card__icon-wrap {
  width: 3rem;
  height: 3rem;
  background: var(--clr-surface);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.app-card__name {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.app-card__desc {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
  flex: 1;
}

.app-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.tag {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  background: rgba(99, 102, 241, 0.15);
  color: var(--clr-accent-2);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  font-weight: 500;
}

.app-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-accent-2);
  transition: color var(--trans), gap var(--trans);
  width: fit-content;
}

.app-card__link:hover {
  color: var(--clr-white);
  gap: 0.65rem;
}

/* About */
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about__text .section__title {
  text-align: left;
  margin-bottom: 1.25rem;
}

.about__text p {
  color: var(--clr-text-muted);
  margin-bottom: 1rem;
  font-size: 0.975rem;
}

.about__skills {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.about__skills li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--clr-text-muted);
}

.about__skills li::before {
  content: '→';
  color: var(--clr-accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* Code window */
.code-window {
  background: #0b0d12;
  border: 1px solid var(--clr-border);
  border-radius: 0.875rem;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}

.code-window__bar {
  background: var(--clr-surface-2);
  padding: 0.75rem 1rem;
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--clr-border);
}

.code-window__bar span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--clr-border);
}

.code-window__bar span:nth-child(1) { background: #ff5f57; }
.code-window__bar span:nth-child(2) { background: #febc2e; }
.code-window__bar span:nth-child(3) { background: #28c840; }

.code-window__body {
  padding: 1.5rem 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.9;
  overflow-x: auto;
}

.code-kw  { color: #c792ea; }
.code-var { color: #82aaff; }
.code-key { color: #f07178; }
.code-str { color: #c3e88d; }

/* Contact */
.contact {
  background: var(--clr-surface);
}

.contact__inner {
  text-align: center;
}

.contact__inner .section__title {
  margin-bottom: 0.5rem;
}

.contact__inner .section__desc {
  margin-bottom: 2.5rem;
}

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

.contact-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: 0.75rem;
  padding: 1rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  transition: border-color var(--trans), transform var(--trans);
}

.contact-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-3px);
}

.contact-card__icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

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

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

/* Responsive */
@media (max-width: 768px) {
  /* Nav */
  .nav__links {
    display: none;
    position: absolute;
    top: 4.5rem;
    inset-inline: 0;
    background: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    flex-direction: column;
    gap: 0;
    padding-block: 0.5rem;
  }

  .nav__links.open {
    display: flex;
  }

  .nav__links a {
    padding: 0.85rem 1.5rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--clr-border);
  }

  .nav__hamburger {
    display: flex;
  }

  /* Hero */
  .hero__inner {
    padding-block: 4rem 3rem;
  }

  /* About */
  .about__inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about__visual {
    order: -1;
  }

  /* Contact */
  .contact__links {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-card {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }
}

/* Lang Link */
.lang-link {
  background: transparent;
  border: 1.5px solid var(--clr-border);
  color: var(--clr-text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.65rem;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: border-color var(--trans), color var(--trans);
  white-space: nowrap;
  text-decoration: none;
}

.lang-link:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

/* App Card — Screenshots */
.app-card__screenshots {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 2px;
  scrollbar-width: none;
  margin-top: 0.25rem;
}

.app-card__screenshots::-webkit-scrollbar { display: none; }

.app-card__thumb {
  flex-shrink: 0;
  width: 5.5rem;
  height: 9.5rem;
  object-fit: cover;
  border-radius: 0.5rem;
  border: 1px solid var(--clr-border);
  cursor: pointer;
  transition: opacity var(--trans), transform var(--trans), border-color var(--trans);
}

.app-card__thumb:hover {
  opacity: 0.85;
  transform: scale(1.03);
  border-color: var(--clr-accent);
}

/* Screenshot Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal[hidden] { display: none; }

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  cursor: pointer;
}

.modal__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  max-width: min(420px, 90vw);
  width: 100%;
}

.modal__close {
  position: absolute;
  top: -2.5rem;
  right: 0;
  background: none;
  border: none;
  color: var(--clr-text);
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--trans);
}

.modal__close:hover { opacity: 1; }

.modal__img {
  width: 100%;
  max-height: 75dvh;
  object-fit: contain;
  border-radius: 1rem;
  box-shadow: 0 24px 60px rgba(0,0,0,0.6);
}

.modal__nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.modal__arrow {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  color: var(--clr-text);
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--trans), border-color var(--trans);
}

.modal__arrow:hover {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
}

.modal__counter {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  min-width: 4rem;
  text-align: center;
}

/* Animations / Fade-in */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

.fade-in.visible {
  opacity: 1;
  transform: none;
}