/* Landing page — Ravi Mughal | dark tech portfolio */

:root {
  --bg-deep: #06080f;
  --bg-elevated: #0c101a;
  --bg-card: #111827;
  --bg-card-hover: #151d2e;
  --border-subtle: rgba(56, 189, 248, 0.12);
  --text-primary: #f1f5f9;
  --text-muted: #94a3b8;
  --accent-cyan: #22d3ee;
  --accent-blue: #38bdf8;
  --accent-deep: #0ea5e9;
  --gradient-hero: linear-gradient(135deg, rgba(14, 165, 233, 0.15) 0%, rgba(34, 211, 238, 0.08) 50%, transparent 70%);
  --font-sans: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius-lg: 16px;
  --radius-md: 12px;
  --shadow-glow: 0 0 60px rgba(34, 211, 238, 0.06);
  --max: 1120px;
  --header-h: 64px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.landing {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
}

body.landing .landing-logo,
body.landing .landing-nav a {
  text-decoration: none;
}

body.landing img {
  max-width: 100%;
  height: auto;
  display: block;
}

.landing-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 0.75rem 1rem;
  background: var(--accent-cyan);
  color: var(--bg-deep);
  z-index: 1000;
}

.landing-skip:focus {
  left: 1rem;
  top: 1rem;
}

/* Header */
.landing-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(6, 8, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.landing-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.landing-logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent-cyan);
}

.landing-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.35rem 1.25rem;
}

.landing-nav a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.landing-nav a:hover {
  color: var(--text-primary);
}

/* Hero */
.landing-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3rem, 8vw, 5.5rem) 1.5rem 4rem;
  background: var(--gradient-hero);
}

.landing-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.18), transparent);
  pointer-events: none;
}

.landing-hero__grid {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .landing-hero__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3rem;
  }
}

.landing-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  margin-bottom: 1.25rem;
}

.landing-hero__badge span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan);
}

.landing-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2.25rem, 5vw, 3.35rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.landing-hero__subtitle {
  margin: 0 0 1.25rem;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  font-weight: 500;
  color: var(--accent-blue);
}

.landing-hero__lead {
  margin: 0 0 1.75rem;
  max-width: 36rem;
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.landing-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.landing-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.15s;
}

.landing-btn:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.landing-btn--primary {
  background: linear-gradient(135deg, var(--accent-deep), var(--accent-cyan));
  color: var(--bg-deep);
  border-color: transparent;
}

.landing-btn--primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.landing-btn--ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.landing-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(56, 189, 248, 0.35);
}

.landing-btn--outline {
  background: transparent;
  border-color: rgba(148, 163, 184, 0.35);
  color: var(--text-primary);
}

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

.landing-hero__visual {
  display: flex;
  justify-content: center;
}

.landing-profile {
  position: relative;
  width: min(280px, 85vw);
  aspect-ratio: 1;
  border-radius: 24px;
  padding: 4px;
  background: linear-gradient(145deg, rgba(34, 211, 238, 0.5), rgba(14, 165, 233, 0.2), rgba(56, 189, 248, 0.15));
  box-shadow: var(--shadow-glow), 0 24px 48px rgba(0, 0, 0, 0.35);
}

.landing-profile__inner {
  width: 100%;
  height: 100%;
  border-radius: 20px;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.landing-profile__inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.landing-profile__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent-cyan);
  opacity: 0.35;
  background: linear-gradient(160deg, var(--bg-elevated), var(--bg-deep));
}

/* Sections common */
.landing-section {
  padding: clamp(3.5rem, 6vw, 5rem) 1.5rem;
}

.landing-section--alt {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

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

.landing-section__label {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-cyan);
}

.landing-section h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.65rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.landing-section__intro {
  margin: 0 0 2rem;
  max-width: 42rem;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

/* About */
.landing-about__text {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 42rem;
}

.landing-about__text p {
  margin: 0 0 1rem;
}

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

/* Stack */
.landing-stack-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .landing-stack-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .landing-stack-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.landing-stack-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.25rem;
  transition: background 0.2s, border-color 0.2s;
}

.landing-stack-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.22);
}

.landing-stack-card h3 {
  margin: 0 0 1rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-blue);
}

.landing-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.landing-tag {
  display: inline-block;
  padding: 0.35rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 6px;
}

/* Focus areas */
.landing-focus-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .landing-focus-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .landing-focus-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.landing-focus-card {
  position: relative;
  padding: 1.5rem 1.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}

.landing-focus-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-deep));
  opacity: 0.85;
}

.landing-focus-card:hover {
  border-color: rgba(56, 189, 248, 0.28);
  transform: translateY(-2px);
}

.landing-focus-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.landing-focus-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Projects carousel */
.landing-carousel {
  position: relative;
  margin-top: 0.5rem;
}

.landing-carousel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.landing-carousel__controls {
  display: flex;
  gap: 0.5rem;
}

.landing-carousel__btn {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.landing-carousel__btn:hover {
  border-color: rgba(56, 189, 248, 0.4);
  color: var(--accent-cyan);
  background: var(--bg-card-hover);
}

.landing-carousel__btn:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.landing-carousel__btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

.landing-carousel__viewport {
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(56, 189, 248, 0.35) transparent;
  margin: 0 -1.5rem;
  padding: 0 1.5rem 0.75rem;
}

.landing-carousel__viewport::-webkit-scrollbar {
  height: 6px;
}

.landing-carousel__viewport::-webkit-scrollbar-thumb {
  background: rgba(56, 189, 248, 0.3);
  border-radius: 3px;
}

.landing-carousel__track {
  position: relative;
  display: flex;
  gap: 1.25rem;
  padding: 0.25rem 0 0.5rem;
}

.landing-carousel__slide {
  flex: 0 0 min(360px, calc(100vw - 3.5rem));
  scroll-snap-align: start;
  scroll-snap-stop: always;
  max-width: 100%;
}

@media (min-width: 480px) {
  .landing-carousel__slide {
    flex-basis: min(380px, calc(100vw - 4rem));
  }
}

@media (min-width: 900px) {
  .landing-carousel__slide {
    flex-basis: min(400px, calc((100% - 2.5rem) / 2));
  }
}

.landing-carousel__dots {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  margin-top: 1.25rem;
  padding: 0 0.5rem;
}

.landing-carousel__dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.35);
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.landing-carousel__dot:hover {
  background: rgba(56, 189, 248, 0.55);
}

.landing-carousel__dot--active {
  background: var(--accent-cyan);
  transform: scale(1.15);
}

.landing-carousel__dot:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .landing-carousel__viewport {
    scroll-behavior: auto;
  }
}

.landing-project-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  height: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.landing-project-card:hover {
  border-color: rgba(56, 189, 248, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.landing-project-card__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
  line-height: 1.45;
}

.landing-project-card__flag {
  display: inline-block;
  margin: 0 0 0.65rem;
  padding: 0.2rem 0.5rem;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 4px;
  background: rgba(251, 191, 36, 0.12);
  color: #fbbf24;
  border: 1px solid rgba(251, 191, 36, 0.28);
}

.landing-project-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
  font-weight: 700;
}

.landing-project-card__desc {
  flex: 1;
  margin: 0 0 1.1rem;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.landing-project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.landing-project-card__tech span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  background: rgba(34, 211, 238, 0.08);
  color: var(--accent-blue);
  border: 1px solid rgba(34, 211, 238, 0.15);
}

.landing-project-card .landing-btn {
  align-self: flex-start;
  margin-top: auto;
}

.landing-project-card__cta-muted {
  align-self: flex-start;
  margin-top: auto;
  padding: 0.65rem 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.landing-carousel__slide .landing-project-card {
  min-height: 26rem;
}

/* Strengths */
.landing-strengths-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .landing-strengths-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .landing-strengths-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.landing-strength-card {
  padding: 1.5rem 1.35rem;
  background: linear-gradient(165deg, var(--bg-card) 0%, var(--bg-elevated) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s;
}

.landing-strength-card:hover {
  border-color: rgba(56, 189, 248, 0.25);
}

.landing-strength-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.landing-strength-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Contact / footer */
.landing-footer {
  padding: 3.5rem 1.5rem 2rem;
  background: var(--bg-deep);
  border-top: 1px solid var(--border-subtle);
}

.landing-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  text-align: center;
}

.landing-footer h2 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
}

.landing-footer__tagline {
  margin: 0 0 2rem;
  color: var(--text-muted);
  font-size: 1rem;
}

.landing-footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.5rem;
  margin-bottom: 2.5rem;
}

.landing-footer__links a {
  font-weight: 600;
  color: var(--accent-blue);
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.landing-footer__links a:hover {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

.landing-footer__closing {
  margin: 0;
  font-size: 0.95rem;
  font-style: italic;
  color: var(--text-muted);
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.landing-footer__copy {
  margin: 2.5rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}