/* =============================================
   RONISH RAJBANSHI PORTFOLIO — style.css
   Premium Dark Navy Aesthetic
   ============================================= */

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

:root {
  --green:       #39ff7a;
  --green-dim:   #1aff5e22;
  --green-glow:  #39ff7a55;
  --red:         #ff4d6d;
  --accent:      #00d4ff;
  --purple:      #c77dff;
  --orange:      #ff8c42;
  --blue:        #4d9fff;
  --cyan:        #00d4ff;

  --bg:          #080b1f;
  --bg2:         #0c1028;
  --bg3:         #101430;
  --card-bg:     rgba(255,255,255,0.03);
  --card-border: rgba(255,255,255,0.08);
  --text:        #e2e8f0;
  --text-dim:    #7a8ba8;
  --font-body:   'Outfit', sans-serif;
  --font-mono:   'Share Tech Mono', monospace;
  --nav-h:       64px;
  --radius:      14px;
  --transition:  0.3s ease;
}

html { scroll-behavior: smooth; }

@keyframes gradient-bg {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

body {
  font-family: var(--font-body);
  background: linear-gradient(-45deg, #080b1f, #11183b, #0a0f2b, #080b1f);
  background-size: 400% 400%;
  animation: gradient-bg 20s ease infinite;
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---- Moving Background Overlay ---- */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    radial-gradient(ellipse at 15% 40%, rgba(99,102,241,0.12) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 15%, rgba(139,92,246,0.1) 0%, transparent 55%),
    radial-gradient(ellipse at 60% 85%, rgba(59,130,246,0.08) 0%, transparent 50%);
  z-index: -1;
  pointer-events: none;
}

/* ---- Snow Canvas ---- */
#snow-bg {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.8;
}

/* ---- Utility ---- */
.green  { color: var(--green); }
.accent { color: var(--accent); }
.section-tag {
  font-family: var(--font-mono);
  color: var(--text-dim);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); font-weight: 700; margin-bottom: 0.6rem; }
.section-sub { color: var(--text-dim); font-size: 0.95rem; max-width: 500px; margin: 0 auto; }

/* ============================
   NAV
   ============================ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 2.5rem;
  background: rgba(8,11,31,0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  transition: background var(--transition);
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: 0.05em;
  margin-right: auto;
}
.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-dim);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); }
.btn-nav {
  background: rgba(57,255,122,0.08) !important;
  border: 1px solid rgba(57,255,122,0.4) !important;
  color: var(--green) !important;
  padding: 0.4rem 1.1rem;
  border-radius: 6px;
  font-size: 0.83rem !important;
  transition: all var(--transition) !important;
}
.btn-nav:hover {
  background: rgba(57,255,122,0.15) !important;
  border-color: var(--green) !important;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: 1.5rem;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-dim);
  border-radius: 2px;
  transition: transform 0.3s;
}

/* ============================
   HERO / ABOUT
   ============================ */
.hero-section {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-h) + 3rem) 2.5rem 4rem;
}
.hero-inner {
  max-width: 1050px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto auto;
  justify-content: center;
  gap: 4rem;
  align-items: center;
  width: 100%;
}
.hero-name {
  font-size: clamp(2.8rem, 5.5vw, 4.2rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
  color: #fff;
}
.hero-bio {
  color: var(--text-dim);
  font-size: 0.97rem;
  line-height: 1.85;
  max-width: 520px;
  margin-bottom: 2rem;
}
.hero-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--green);
  color: #06091a;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.72rem 1.7rem;
  border-radius: 8px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: box-shadow var(--transition), transform var(--transition);
}
.btn-primary:hover {
  box-shadow: 0 0 24px var(--green-glow);
  transform: translateY(-2px);
}
.btn-primary svg { width: 17px; height: 17px; }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255,255,255,0.05);
  color: var(--text);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.72rem 1.7rem;
  border-radius: 8px;
  text-decoration: none;
  border: 1px solid var(--card-border);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.09);
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}
.btn-large { padding: 0.88rem 2.1rem; font-size: 0.97rem; }
.btn-full { width: 100%; justify-content: center; }
.hero-socials {
  display: flex;
  gap: 1.5rem;
}
.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition);
}
.social-link svg { width: 15px; height: 15px; }
.social-link:hover { color: var(--text); }

/* Hero Image */
.hero-image-wrap { display: flex; justify-content: center; align-items: flex-start; }
.hero-photo {
  width: 320px;
  height: 320px;
  object-fit: cover;
  object-position: top center;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 60px rgba(99, 102, 241, 0.3), 0 24px 64px rgba(0, 0, 0, 0.6);
  display: block;
}

/* Scroll indicator */
.scroll-down {
  display: flex;
  justify-content: center;
  margin-top: 3rem;
}
.scroll-dot {
  display: block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--text-dim);
  animation: bounce-dot 1.8s ease-in-out infinite;
}
@keyframes bounce-dot {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50%       { transform: translateY(8px); opacity: 0.3; }
}

/* ============================
   SKILLS
   ============================ */
.skills-section {
  position: relative;
  z-index: 1;
  padding: 5rem 2.5rem;
}
.skills-grid {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.skill-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem 1.25rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  cursor: default;
  text-align: center;
  backdrop-filter: blur(8px);
}
.skill-card:hover {
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

/* Per-skill icon colour theming */
#skill-networking .skill-icon-img { filter: hue-rotate(180deg) saturate(1.8) brightness(1.1); }
#skill-linux      .skill-icon-img { filter: hue-rotate(60deg) saturate(2) brightness(1.2); }
#skill-bash       .skill-icon-img { filter: brightness(1.05); }

#skill-networking .skill-bar-fill-color { --fill: #00d4ff; }
#skill-linux      .skill-bar-fill-color { --fill: #ff8c42; }
#skill-bash       .skill-bar-fill-color { --fill: #39ff7a; }

.skill-icon-wrap {
  width: 60px; height: 60px;
  margin: 0 auto 1rem;
  border-radius: 14px;
  overflow: hidden;
  background: rgba(255,255,255,0.04);
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--card-border);
}
.skill-icon-img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.skill-svg-wrap { overflow: visible; background: transparent; border: none; }
.skill-svg { width: 46px; height: 46px; }

.skill-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.35rem;
}
.skill-card p {
  font-size: 0.78rem;
  color: var(--text-dim);
  line-height: 1.55;
  margin-bottom: 1rem;
}
.skill-bar {
  height: 2px;
  background: rgba(255,255,255,0.07);
  border-radius: 999px;
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  width: var(--pct);
  background: var(--bar-color, var(--green));
  border-radius: 999px;
  animation: fill-bar 1.5s ease forwards;
  transform-origin: left;
}
@keyframes fill-bar {
  from { width: 0; }
  to   { width: var(--pct); }
}

/* ============================
   CTA SECTION
   ============================ */
.cta-section {
  position: relative;
  z-index: 1;
  padding: 5rem 2.5rem;
}
.cta-simple {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}
.cta-simple h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 0.9rem;
  color: #fff;
}
.cta-desc {
  color: var(--text-dim);
  font-size: 0.97rem;
  line-height: 1.7;
  margin-bottom: 2rem;
}

/* ============================
   PAGE HERO (projects.html)
   ============================ */
.page-hero {
  position: relative;
  z-index: 1;
  padding: calc(var(--nav-h) + 4rem) 2.5rem 3rem;
  text-align: center;
}
.page-hero-inner { max-width: 640px; margin: 0 auto; }
.page-hero h1 { font-size: clamp(2.2rem, 4.5vw, 3.5rem); font-weight: 900; margin-bottom: 0.75rem; color: #fff; }
.page-hero-sub { color: var(--text-dim); font-size: 0.97rem; }

/* ============================
   PROJECTS
   ============================ */
.projects-section {
  position: relative;
  z-index: 1;
  padding: 2rem 2.5rem 5rem;
}
.filter-bar {
  max-width: 1000px;
  margin: 0 auto 2.5rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.filter-btn {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.42rem 1.1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
  backdrop-filter: blur(8px);
}
.filter-btn:hover,
.filter-btn.active {
  border-color: rgba(255,255,255,0.3);
  color: var(--text);
  background: rgba(255,255,255,0.07);
}
.projects-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
.project-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  backdrop-filter: blur(8px);
}
.project-card:hover {
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
}
.project-card.hidden { display: none; }
.project-header { display: flex; justify-content: space-between; align-items: center; }
.proj-category-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.22rem 0.7rem;
  border-radius: 999px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.proj-category-tag.automation { background: rgba(57,255,122,0.1); color: var(--green); border: 1px solid rgba(57,255,122,0.25); }
.proj-category-tag.malware    { background: rgba(255,77,109,0.1); color: var(--red);   border: 1px solid rgba(255,77,109,0.25); }
.proj-icon { width: 26px; height: 26px; }
.proj-title { font-size: 1.1rem; font-weight: 700; color: var(--text); }
.proj-desc  { font-size: 0.84rem; color: var(--text-dim); line-height: 1.6; }

/* ---- Filter Dropdown ---- */
.filter-dropdown-wrap {
  display: flex;
  justify-content: center;
  margin-top: 0.5rem;
}
.filter-select {
  appearance: none;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.8rem 2.5rem 0.8rem 1.2rem;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22%2339ff7a%22%20stroke-width%3D%222%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpolyline%20points%3D%226%209%2012%2015%2018%209%22%3E%3C%2Fpolyline%3E%3C%2Fsvg%3E");
  background-repeat: no-repeat;
  background-position: right 0.8rem center;
  background-size: 1.2rem;
}
.filter-select:hover, .filter-select:focus {
  border-color: var(--green);
  box-shadow: 0 0 12px rgba(57, 255, 122, 0.2);
}
.filter-select option {
  background: #080b1f;
  color: var(--text);
}

.proj-tags  { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.tag {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--card-border);
  color: var(--text-dim);
  font-size: 0.72rem;
  padding: 0.18rem 0.55rem;
  border-radius: 4px;
  font-family: var(--font-mono);
}
.proj-footer { display: flex; justify-content: space-between; align-items: center; margin-top: auto; }
.proj-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--green);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid rgba(57,255,122,0.35);
  padding: 0.38rem 0.9rem;
  border-radius: 6px;
  transition: background var(--transition), border-color var(--transition);
}
.proj-btn:hover { background: rgba(57,255,122,0.08); border-color: var(--green); }
.proj-btn svg { width: 14px; height: 14px; }
.proj-btn-red { color: var(--red) !important; border-color: rgba(255,77,109,0.35) !important; }
.proj-btn-red:hover { background: rgba(255,77,109,0.08) !important; border-color: var(--red) !important; }
.proj-status { font-family: var(--font-mono); font-size: 0.7rem; padding: 0.22rem 0.65rem; border-radius: 999px; }
.status-done { background: rgba(57,255,122,0.1); color: var(--green); }
.status-wip  { background: rgba(255,189,46,0.1); color: #ffbd2e; }
.project-empty {
  align-items: center;
  text-align: center;
  border-style: dashed;
  opacity: 0.5;
}
.empty-icon { width: 44px; height: 44px; margin: 0 auto; }
.empty-icon svg { width: 100%; height: 100%; }
.project-empty h3 { font-size: 1rem; color: var(--text-dim); }
.project-empty p  { font-size: 0.82rem; color: var(--text-dim); max-width: 260px; line-height: 1.55; }

/* ============================
   CONTACT
   ============================ */
.contact-section {
  position: relative;
  z-index: 1;
  padding: 5rem 2.5rem 6rem;
}
.contact-inner {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 2.5rem;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 1rem; }
.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  transition: border-color var(--transition);
  backdrop-filter: blur(8px);
}
.contact-card:hover { border-color: rgba(255,255,255,0.18); }
.contact-icon { width: 32px; height: 32px; flex-shrink: 0; }
.contact-icon svg { width: 100%; height: 100%; }
.contact-label { font-size: 0.72rem; color: var(--text-dim); font-family: var(--font-mono); margin-bottom: 0.2rem; }
.contact-value { color: var(--text); text-decoration: none; font-size: 0.88rem; transition: color var(--transition); }
.contact-value:hover { color: var(--green); }
.contact-form {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  backdrop-filter: blur(8px);
}
.form-group { display: flex; flex-direction: column; gap: 0.35rem; }
.form-group label { font-size: 0.78rem; color: var(--text-dim); font-family: var(--font-mono); }
.form-group input,
.form-group textarea {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.7rem 0.9rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: rgba(255,255,255,0.25);
  box-shadow: 0 0 0 2px rgba(255,255,255,0.05);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }
.form-success {
  font-family: var(--font-mono);
  color: var(--green);
  font-size: 0.82rem;
  text-align: center;
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 900px) {
  .hero-inner    { grid-template-columns: 1fr; text-align: center; gap: 3rem; }
  .hero-text     { order: 2; }
  .hero-image-wrap { order: 1; justify-content: center; }
  .hero-btns, .hero-socials { justify-content: center; }
  .hero-bio      { margin: 0 auto 2rem; }
  .skills-grid   { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-inner { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  #navbar { padding: 0 1.25rem; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0; background: rgba(8,11,31,0.97); padding: 1.5rem; gap: 1.25rem; border-bottom: 1px solid var(--card-border); }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .hero-section, .skills-section, .cta-section, .projects-section, .contact-section { padding-left: 1.25rem; padding-right: 1.25rem; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-photo { width: 240px; height: 240px; }
  .filter-bar { gap: 0.5rem; }
}

/* ============================
   SCROLL ANIMATIONS
   ============================ */
.reveal {
  opacity: 0;
  transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}
.reveal.active {
  opacity: 1;
  transform: translate(0, 0) scale(1) !important;
}
.fade-left { transform: translateX(-80px); }
.fade-right { transform: translateX(80px); }
.fade-up { transform: translateY(80px); }
.fade-down { transform: translateY(-80px); }
.fade-in { transform: scale(0.95); }