/* ============================================================
   RITIKA SHRESTHA — PORTFOLIO STYLESHEET
   A premium dark-themed design system
   ============================================================ */

/* ---------- CSS CUSTOM PROPERTIES ---------- */
:root {
  /* Colors */
  --clr-bg:          #0a0a1a;
  --clr-bg-light:    #111128;
  --clr-bg-card:     #161630;
  --clr-surface:     #1c1c3a;
  --clr-border:      rgba(255, 255, 255, 0.06);
  --clr-text:        #e0e0f0;
  --clr-text-muted:  #8888aa;
  --clr-white:       #ffffff;

  /* Accent palette */
  --clr-accent-1:    #6c63ff;  /* Primary purple */
  --clr-accent-2:    #00d4ff;  /* Cyan */
  --clr-accent-3:    #ff6b9d;  /* Pink */
  --clr-gradient:    linear-gradient(135deg, var(--clr-accent-1), var(--clr-accent-2));
  --clr-gradient-alt:linear-gradient(135deg, var(--clr-accent-1), var(--clr-accent-3));

  /* Typography */
  --ff-heading:  'Space Grotesk', sans-serif;
  --ff-body:     'Inter', sans-serif;

  /* Spacing */
  --section-pad: clamp(4rem, 10vh, 8rem) 0;

  /* Misc */
  --radius:   12px;
  --radius-lg:20px;
  --shadow:   0 8px 32px rgba(0,0,0,.35);
  --transition: .35s cubic-bezier(.4,0,.2,1);
}

/* ---------- RESET & BASE ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;scroll-padding-top:5rem;font-size:16px;}
body{
  font-family:var(--ff-body);
  background:var(--clr-bg);
  color:var(--clr-text);
  line-height:1.7;
  overflow-x:hidden;
  cursor:none;
}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}
img{max-width:100%;display:block;}
button{border:none;background:none;cursor:pointer;color:inherit;font-family:inherit;}

::selection{background:var(--clr-accent-1);color:var(--clr-white);}
::-webkit-scrollbar{width:8px;}
::-webkit-scrollbar-track{background:var(--clr-bg);}
::-webkit-scrollbar-thumb{background:var(--clr-accent-1);border-radius:4px;}

.container{width:min(1200px,90%);margin:0 auto;}

/* ---------- PRELOADER ---------- */
.preloader{
  position:fixed;inset:0;z-index:10000;
  display:flex;align-items:center;justify-content:center;
  background:var(--clr-bg);
  transition:opacity .6s, visibility .6s;
}
.preloader.hidden{opacity:0;visibility:hidden;pointer-events:none;}
.preloader__spinner{
  width:48px;height:48px;
  border:3px solid var(--clr-border);
  border-top-color:var(--clr-accent-1);
  border-radius:50%;
  animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg);}}

/* ---------- CUSTOM CURSOR ---------- */
.cursor{
  position:fixed;pointer-events:none;z-index:9999;
  border-radius:50%;
  transition:transform .15s ease, opacity .3s;
  mix-blend-mode:difference;
}
.cursor--outer{
  width:36px;height:36px;
  border:1.5px solid var(--clr-accent-2);
  transform:translate(-50%,-50%);
}
.cursor--inner{
  width:8px;height:8px;
  background:var(--clr-accent-1);
  transform:translate(-50%,-50%);
}
@media(pointer:coarse){.cursor{display:none;}body{cursor:auto;}}

/* ---------- HEADER / NAV ---------- */
.header{
  position:fixed;top:0;left:0;width:100%;z-index:1000;
  padding:1rem 0;
  transition:background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.header.scrolled{
  background:rgba(10,10,26,.85);
  backdrop-filter:blur(16px);
  box-shadow:0 2px 20px rgba(0,0,0,.3);
  padding:.6rem 0;
}
.nav{display:flex;align-items:center;justify-content:space-between;}
.nav__logo{
  font-family:var(--ff-heading);
  font-size:1.5rem;font-weight:700;
  letter-spacing:1px;
  color:var(--clr-white);
}
.nav__logo-bracket{color:var(--clr-accent-1);}
.nav__list{display:flex;gap:2rem;}
.nav__link{
  font-size:.9rem;font-weight:500;
  color:var(--clr-text-muted);
  position:relative;
  transition:color var(--transition);
}
.nav__link::after{
  content:'';position:absolute;bottom:-4px;left:0;
  width:0;height:2px;
  background:var(--clr-gradient);
  transition:width var(--transition);
}
.nav__link:hover,.nav__link.active{color:var(--clr-white);}
.nav__link:hover::after,.nav__link.active::after{width:100%;}

/* Mobile toggle */
.nav__toggle{
  display:none;flex-direction:column;gap:5px;
  width:28px;padding:4px 0;
}
.nav__toggle span{
  display:block;height:2px;background:var(--clr-white);
  border-radius:2px;transition:var(--transition);
}
.nav__toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav__toggle.open span:nth-child(2){opacity:0;}
.nav__toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- HERO ---------- */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;align-items:center;
  overflow:hidden;
}
.hero__canvas{
  position:absolute;inset:0;z-index:0;
}
.hero__content{position:relative;z-index:1;padding:8rem 0 4rem;}
.hero__greeting{
  font-size:clamp(1rem,2vw,1.25rem);
  color:var(--clr-accent-2);
  font-weight:500;letter-spacing:2px;
  text-transform:uppercase;
  margin-bottom:.5rem;
}
.hero__name{
  font-family:var(--ff-heading);
  font-size:clamp(2.5rem,7vw,5rem);
  font-weight:800;line-height:1.1;
  color:var(--clr-white);
  margin-bottom:1rem;
}
.gradient-text{
  background:var(--clr-gradient);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero__tagline{
  font-size:clamp(1.1rem,2.5vw,1.5rem);
  color:var(--clr-text-muted);
  min-height:2rem;margin-bottom:1rem;
}
.typewriter__cursor{
  color:var(--clr-accent-1);
  animation:blink .7s step-end infinite;
}
@keyframes blink{50%{opacity:0;}}
.hero__description{
  max-width:540px;
  font-size:1.05rem;color:var(--clr-text-muted);
  margin-bottom:2rem;
}
.hero__cta{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:3rem;}

/* Scroll indicator */
.hero__scroll{
  position:absolute;bottom:2rem;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:.5rem;
  color:var(--clr-text-muted);font-size:.75rem;letter-spacing:2px;text-transform:uppercase;
}
.hero__scroll-line{
  width:1px;height:40px;
  background:var(--clr-gradient);
  animation:scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine{
  0%{transform:scaleY(0);transform-origin:top;}
  50%{transform:scaleY(1);transform-origin:top;}
  51%{transform-origin:bottom;}
  100%{transform:scaleY(0);transform-origin:bottom;}
}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.85rem 2rem;
  border-radius:60px;font-size:.95rem;font-weight:600;
  transition:var(--transition);
  position:relative;overflow:hidden;
}
.btn--primary{
  background:var(--clr-gradient);
  color:var(--clr-white);
  box-shadow:0 4px 20px rgba(108,99,255,.35);
}
.btn--primary:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 30px rgba(108,99,255,.5);
}
.btn--outline{
  border:1.5px solid var(--clr-accent-1);
  color:var(--clr-accent-1);
}
.btn--outline:hover{
  background:var(--clr-accent-1);color:var(--clr-white);
  transform:translateY(-2px);
}
.btn--full{width:100%;justify-content:center;}

/* ---------- SECTIONS COMMON ---------- */
.section{padding:var(--section-pad);}
.section__title{
  font-family:var(--ff-heading);
  font-size:clamp(1.8rem,4vw,2.5rem);
  font-weight:700;
  margin-bottom:3rem;
  color:var(--clr-white);
}
.section__number{
  color:var(--clr-accent-1);
  font-size:.9em;font-weight:600;
  margin-right:.5rem;
}

/* ---------- ABOUT ---------- */
.about__grid{
  display:grid;
  grid-template-columns:1fr 1.4fr;
  gap:4rem;align-items:center;
}
.about__image-wrapper{
  position:relative;width:100%;max-width:350px;
  margin:0 auto;
}
.about__image{
  border-radius:var(--radius-lg);
  position:relative;z-index:1;
  box-shadow:var(--shadow);
}
.about__image-border{
  position:absolute;inset:-12px;
  border:2px solid var(--clr-accent-1);
  border-radius:var(--radius-lg);
  opacity:.4;
  transition:var(--transition);
}
.about__image-wrapper:hover .about__image-border{
  inset:-8px;opacity:.7;
}
.about__text{
  color:var(--clr-text-muted);
  margin-bottom:1rem;
  font-size:1.02rem;
}
.about__text strong{color:var(--clr-white);}
.about__stats{
  display:flex;gap:2.5rem;
  margin:2rem 0;
}
.about__stat{text-align:center;}
.about__stat-number{
  display:block;
  font-family:var(--ff-heading);
  font-size:2.2rem;font-weight:700;
  background:var(--clr-gradient);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.about__stat-number::after{content:'+';-webkit-text-fill-color:var(--clr-accent-2);}
.about__stat-label{
  font-size:.8rem;color:var(--clr-text-muted);
  text-transform:uppercase;letter-spacing:1px;
}

/* ---------- SKILLS ---------- */
.skills__grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:1.5rem;
}
.skill-card{
  background:var(--clr-bg-card);
  border:1px solid var(--clr-border);
  border-radius:var(--radius-lg);
  padding:2rem;
  transition:var(--transition);
  position:relative;overflow:hidden;
}
.skill-card::before{
  content:'';position:absolute;inset:0;
  background:var(--clr-gradient);
  opacity:0;
  transition:opacity .4s;
}
.skill-card:hover{
  transform:translateY(-6px);
  border-color:rgba(108,99,255,.3);
  box-shadow:0 12px 40px rgba(108,99,255,.15);
}
.skill-card:hover::before{opacity:.05;}
.skill-card__icon{
  width:48px;height:48px;
  display:flex;align-items:center;justify-content:center;
  color:var(--clr-accent-1);
  margin-bottom:1rem;
  position:relative;z-index:1;
}
.skill-card__icon svg{width:32px;height:32px;}
.skill-card__title{
  font-family:var(--ff-heading);
  font-size:1.15rem;font-weight:600;
  color:var(--clr-white);
  margin-bottom:1rem;
  position:relative;z-index:1;
}
.skill-card__bar{
  height:4px;border-radius:4px;
  background:var(--clr-border);
  overflow:hidden;
  position:relative;z-index:1;
}
.skill-card__progress{
  height:100%;border-radius:4px;
  background:var(--clr-gradient);
  width:0;
  transition:width 1.2s cubic-bezier(.4,0,.2,1);
}

/* ---------- PORTFOLIO ---------- */
.portfolio__filters{
  display:flex;gap:.75rem;
  margin-bottom:2.5rem;flex-wrap:wrap;
}
.portfolio__filter{
  padding:.5rem 1.5rem;
  border-radius:60px;
  font-size:.85rem;font-weight:500;
  color:var(--clr-text-muted);
  border:1px solid var(--clr-border);
  transition:var(--transition);
}
.portfolio__filter:hover,.portfolio__filter.active{
  background:var(--clr-accent-1);
  color:var(--clr-white);
  border-color:var(--clr-accent-1);
}
.portfolio__grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(320px,1fr));
  gap:1.5rem;
}
.project-card{
  background:var(--clr-bg-card);
  border:1px solid var(--clr-border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:var(--transition);
}
.project-card:hover{
  transform:translateY(-8px);
  box-shadow:0 20px 60px rgba(0,0,0,.3);
  border-color:rgba(108,99,255,.2);
}
.project-card.hidden{
  display:none;
}
.project-card__image{position:relative;overflow:hidden;}
.project-card__placeholder{
  height:200px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg, var(--clr-bg-light), var(--clr-surface));
}
.project-card__placeholder svg{
  width:48px;height:48px;
  color:var(--accent, var(--clr-accent-1));
  opacity:.5;
}
.project-card__overlay{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(108,99,255,.15);
  backdrop-filter:blur(4px);
  opacity:0;
  transition:opacity var(--transition);
}
.project-card:hover .project-card__overlay{opacity:1;}
.project-card__link{
  width:50px;height:50px;
  display:flex;align-items:center;justify-content:center;
  background:var(--clr-accent-1);
  border-radius:50%;
  color:var(--clr-white);
  transform:scale(.8);
  transition:var(--transition);
}
.project-card__link svg{width:22px;height:22px;}
.project-card__link:hover{transform:scale(1);background:var(--clr-accent-2);}
.project-card__info{padding:1.5rem;}
.project-card__title{
  font-family:var(--ff-heading);
  font-size:1.15rem;font-weight:600;
  color:var(--clr-white);
  margin-bottom:.5rem;
}
.project-card__description{
  font-size:.9rem;color:var(--clr-text-muted);
  margin-bottom:1rem;line-height:1.5;
}
.project-card__tags{display:flex;gap:.5rem;flex-wrap:wrap;}
.project-card__tags span{
  font-size:.75rem;
  padding:.25rem .75rem;
  border-radius:60px;
  background:rgba(108,99,255,.1);
  color:var(--clr-accent-1);
  border:1px solid rgba(108,99,255,.2);
}

/* ---------- CONTACT ---------- */
.contact__grid{
  display:grid;
  grid-template-columns:1fr 1.2fr;
  gap:4rem;align-items:start;
}
.contact__description{
  font-size:1.05rem;color:var(--clr-text-muted);
  margin-bottom:2rem;
}
.contact__details{display:flex;flex-direction:column;gap:1.5rem;margin-bottom:2rem;}
.contact__detail{
  display:flex;align-items:center;gap:1rem;
}
.contact__detail-icon{
  width:48px;height:48px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(108,99,255,.1);
  border-radius:var(--radius);
  color:var(--clr-accent-1);
  transition:var(--transition);
}
.contact__detail-icon svg{width:22px;height:22px;}
.contact__detail:hover .contact__detail-icon{
  background:var(--clr-accent-1);color:var(--clr-white);
}
.contact__detail h4{
  font-size:.85rem;color:var(--clr-white);
  font-weight:600;margin-bottom:.15rem;
}
.contact__detail p,.contact__detail a{
  font-size:.9rem;color:var(--clr-text-muted);
  transition:color var(--transition);
}
.contact__detail a:hover{color:var(--clr-accent-2);}
.contact__socials{display:flex;gap:1rem;}
.contact__social{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--clr-border);
  border-radius:50%;
  color:var(--clr-text-muted);
  transition:var(--transition);
}
.contact__social svg{width:20px;height:20px;}
.contact__social:hover{
  background:var(--clr-accent-1);
  border-color:var(--clr-accent-1);
  color:var(--clr-white);
  transform:translateY(-3px);
}

/* Form */
.contact__form{
  background:var(--clr-bg-card);
  border:1px solid var(--clr-border);
  border-radius:var(--radius-lg);
  padding:2.5rem;
}
.form__group{
  position:relative;
  margin-bottom:1.75rem;
}
.form__input{
  width:100%;padding:1rem 0 .5rem;
  background:transparent;
  border:none;border-bottom:1.5px solid var(--clr-border);
  color:var(--clr-white);
  font-family:var(--ff-body);font-size:.95rem;
  outline:none;
  transition:border-color var(--transition);
}
.form__input:focus{border-bottom-color:var(--clr-accent-1);}
.form__label{
  position:absolute;left:0;top:1rem;
  font-size:.95rem;color:var(--clr-text-muted);
  pointer-events:none;
  transition:var(--transition);
}
.form__input:focus ~ .form__label,
.form__input:not(:placeholder-shown) ~ .form__label{
  top:-.4rem;font-size:.75rem;
  color:var(--clr-accent-1);
}
.form__line{
  position:absolute;bottom:0;left:0;
  width:0;height:2px;
  background:var(--clr-gradient);
  transition:width var(--transition);
}
.form__input:focus ~ .form__line{width:100%;}
.form__textarea{resize:vertical;min-height:100px;}
.form__status{
  margin-top:1rem;font-size:.9rem;
  text-align:center;
  transition:var(--transition);
}
.form__status.success{color:#4ade80;}
.form__status.error{color:var(--clr-accent-3);}

/* ---------- FOOTER ---------- */
.footer{
  padding:2rem 0;
  border-top:1px solid var(--clr-border);
}
.footer__content{
  display:flex;align-items:center;
  justify-content:space-between;
}
.footer__logo{
  font-family:var(--ff-heading);
  font-size:1.2rem;font-weight:700;
  color:var(--clr-white);
}
.footer__text{font-size:.85rem;color:var(--clr-text-muted);}
.footer__top{
  width:40px;height:40px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--clr-border);
  border-radius:50%;
  color:var(--clr-text-muted);
  transition:var(--transition);
}
.footer__top svg{width:20px;height:20px;}
.footer__top:hover{
  background:var(--clr-accent-1);color:var(--clr-white);
  border-color:var(--clr-accent-1);
  transform:translateY(-3px);
}

/* ---------- REVEAL ANIMATIONS ---------- */
.reveal-text{
  opacity:0;transform:translateY(30px);
  transition:opacity .8s ease, transform .8s ease;
}
.reveal-text.visible{opacity:1;transform:translateY(0);}

.skill-card,.project-card,.contact__detail,.about__image-wrapper,.about__content{
  opacity:0;transform:translateY(40px);
  transition:opacity .6s ease, transform .6s ease;
}
.skill-card.visible,.project-card.visible,.contact__detail.visible,
.about__image-wrapper.visible,.about__content.visible{
  opacity:1;transform:translateY(0);
}

/* ---------- RESPONSIVE ---------- */
@media(max-width:992px){
  .about__grid{grid-template-columns:1fr;text-align:center;}
  .about__image-wrapper{max-width:280px;}
  .about__stats{justify-content:center;}
  .contact__grid{grid-template-columns:1fr;}
}
@media(max-width:768px){
  .nav__toggle{display:flex;}
  .nav__list{
    position:fixed;top:0;right:-100%;
    width:min(320px,80vw);height:100vh;
    flex-direction:column;justify-content:center;
    gap:2.5rem;
    background:var(--clr-bg-light);
    padding:2rem 3rem;
    transition:right var(--transition);
    box-shadow:-4px 0 30px rgba(0,0,0,.4);
  }
  .nav__list.open{right:0;}
  .nav__link{font-size:1.2rem;}

  .hero__content{padding:6rem 0 4rem;}
  .about__stats{flex-direction:column;gap:1.5rem;}
  .portfolio__grid{grid-template-columns:1fr;}
  .footer__content{flex-direction:column;gap:1rem;text-align:center;}
}
@media(max-width:480px){
  .hero__cta{flex-direction:column;align-items:stretch;}
  .btn{justify-content:center;}
  .skills__grid{grid-template-columns:1fr;}
}