/* ==========================================================================
   CSS Stylesheet for Shreyas' Portfolio
   Hand-coded by Shreyas (with some late night debugging!)
   ========================================================================== */

/* Color tokens and typography variables */
:root {
  --font-main: 'Outfit', sans-serif;
  --font-mono: 'Fira Code', monospace;

  /* Color Palette: Nice clean dark tech colors, not too overcomplicated */
  --color-bg: #0d0f12;           /* Midnight black */
  --color-card-bg: #161a20;      /* Slightly lighter blue-grey card bg */
  --color-border: #262c36;       /* Clean borders */
  --color-border-hover: #3d4656;
  
  --color-text-bright: #f1f5f9;  /* White/light-slate text */
  --color-text-dark: #94a3b8;    /* Muted grey text */

  /* Simple clean neon-ish colors for accents */
  --color-cyan: #00f0ff;
  --color-cyan-glow: rgba(0, 240, 255, 0.15);
  
  --color-violet: #ab47bc;
  --color-violet-glow: rgba(171, 71, 188, 0.2);

  --color-lime: #39ff14;
  --color-lime-glow: rgba(57, 255, 20, 0.15);

  --border-radius: 10px;
  --transition: all 0.25s ease-in-out;
}

/* Simple Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--color-cyan) var(--color-bg);
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text-bright);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: rgba(0, 240, 255, 0.25);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-cyan);
}

/* Background interactive nodes (Canvas takes full width behind elements) */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at center, #13171e 0%, var(--color-bg) 100%);
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 70px 0;
  position: relative;
}

/* Utility classes */
.text-green { color: var(--color-lime); }
.text-highlight { color: var(--color-cyan); }
.mt-3 { margin-top: 1.5rem; }

/* Sticky Header & Nav */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: rgba(13, 15, 18, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px); /* Safari support check */
  border-bottom: 1px solid var(--color-border);
  height: 65px;
}

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

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  color: #fff;
  text-decoration: none;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
}

.logo:hover {
  color: var(--color-cyan);
}

.logo-cursor {
  color: var(--color-cyan);
  animation: blink 0.9s step-end infinite;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-link {
  color: var(--color-text-dark);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  padding: 6px 0;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-cyan);
}

/* simple underline effect for active link */
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-cyan);
}

.mobile-toggle {
  display: none;
  font-size: 1.3rem;
  color: #fff;
  cursor: pointer;
}

/* Mobile Nav Menu */
.mobile-nav {
  display: none;
  position: fixed;
  top: 65px;
  left: 0;
  width: 100%;
  background-color: rgba(13, 15, 18, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 99;
  flex-direction: column;
  padding: 15px 20px;
  gap: 15px;
}

.mobile-link {
  color: var(--color-text-dark);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

/* Hero Section */
.hero-section {
  min-height: 80vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.hero-tag {
  background-color: rgba(0, 240, 255, 0.08);
  color: var(--color-cyan);
  border: 1px solid rgba(0, 240, 255, 0.15);
  padding: 5px 12px;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 600;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
}

.glow-text {
  color: var(--color-cyan);
}

.hero-subtitle {
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--color-text-dark);
}

#typing-text {
  color: #fff;
  border-bottom: 2px solid var(--color-violet);
}

.cursor-pipe {
  animation: blink 0.9s step-end infinite;
  color: var(--color-cyan);
}

@keyframes blink {
  from, to { color: transparent }
  50% { color: var(--color-cyan); }
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-dark);
  max-width: 650px;
  margin: 8px 0 16px 0;
}

/* Hero button triggers and social icons */
.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-cyan);
  color: #0c0f12;
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px var(--color-cyan-glow);
}

.social-hero-group {
  display: flex;
  gap: 12px;
}

.btn-social {
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--color-text-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
}

.btn-social:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
  transform: translateY(-2px);
}

/* Titles */
.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title i {
  color: var(--color-cyan);
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-dark);
  margin-bottom: 35px;
}

/* Dashboard Grid Layout: 3 equal width columns for balanced card flips */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* 3D Flip Card Container */
.flip-card-container {
  perspective: 1000px;
  height: 400px; /* Fixed height so cards flip evenly and look uniform */
  position: relative;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.card-flip-hint {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 0.8rem;
  color: var(--color-text-dark);
  opacity: 0.35;
  transition: transform 0.5s ease, color 0.3s ease, opacity 0.3s ease;
  pointer-events: none;
  z-index: 5;
}

.flip-card-container:hover .card-flip-hint {
  opacity: 1;
  color: var(--color-cyan);
  transform: rotate(180deg);
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.flip-card-container.flipped .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front, 
.flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden; /* Safari check */
  border-radius: var(--border-radius);
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color var(--transition);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch; /* Momentum scrolling for iOS */
  scrollbar-width: none; /* Hide scrollbars for Firefox */
}

.flip-card-front::-webkit-scrollbar,
.flip-card-back::-webkit-scrollbar {
  display: none; /* Hide scrollbar for Safari/Chrome */
}

.flip-card-front:hover,
.flip-card-back:hover {
  border-color: rgba(0, 240, 255, 0.3);
}

.flip-card-back {
  transform: rotateY(180deg);
}

/* Content groups inside cards */
.card-content-top {
  width: 100%;
}

.card-back-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  border-bottom: 1.5px dashed var(--color-border);
  padding-bottom: 8px;
  margin-bottom: 12px;
}

/* CSS styled flip buttons */
.btn-flip {
  background-color: rgba(255, 255, 255, 0.02) !important;
  border: 1px dashed var(--color-border) !important;
  color: var(--color-cyan) !important;
  font-family: var(--font-mono) !important;
  font-size: 0.75rem !important;
  padding: 8px 16px !important;
  width: 100%;
  justify-content: center;
}

.btn-flip:hover {
  border-color: var(--color-cyan) !important;
  background-color: rgba(0, 240, 255, 0.05) !important;
  color: #fff !important;
}

/* Profile Card Detail values */
.profile-header {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 20px;
}

.profile-avatar {
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background-color: rgba(0, 240, 255, 0.07);
  border: 1px solid rgba(0, 240, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--color-cyan);
}

.profile-meta h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
}

.profile-meta p {
  font-size: 0.85rem;
  color: var(--color-text-dark);
}

.badge-college {
  font-size: 0.7rem;
  color: var(--color-violet);
  background-color: rgba(171, 71, 188, 0.08);
  border: 1px solid rgba(171, 71, 188, 0.15);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-top: 4px;
}

.profile-about-summary {
  font-size: 0.85rem;
  color: var(--color-text-dark);
  margin-bottom: 16px;
  line-height: 1.5;
  border-bottom: 1.5px dashed var(--color-border);
  padding-bottom: 14px;
}

.badges-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
  margin-bottom: 16px;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: rgba(0, 240, 255, 0.02);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 8px 12px;
  text-decoration: none;
  transition: var(--transition);
  color: var(--color-text-bright);
}

.badge-item:hover {
  background-color: rgba(0, 240, 255, 0.05);
  border-color: rgba(0, 240, 255, 0.4);
  transform: translateX(3px);
}

.badge-icon {
  font-size: 1.15rem;
  color: var(--color-cyan);
  display: flex;
  align-items: center;
}

.badge-info h5 {
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
}

.badge-info p {
  font-size: 0.7rem;
  color: var(--color-text-dark);
}

.toolkit-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.toolkit-tag {
  background-color: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--color-border);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-bright);
}

.interest-tag {
  background-color: rgba(171, 71, 188, 0.05);
  border: 1px solid rgba(171, 71, 188, 0.15);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #fff;
  font-weight: 500;
}

.profile-details-list {
  list-style: none;
}

.profile-details-list li {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  padding: 8px 0;
}

.profile-details-list li:last-child {
  border-bottom: none;
}

.profile-details-list .label {
  color: var(--color-text-dark);
}

.profile-details-list .val {
  color: #fff;
  font-weight: 500;
}

/* CGPA Dashboard Scorecard */
.cgpa-card-better {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  margin-top: 15px;
}

.cgpa-main-display {
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.cgpa-main-display::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-lime));
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.cgpa-main-display .cgpa-label {
  font-size: 0.7rem;
  color: var(--color-text-dark);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.cgpa-main-display .cgpa-value-large {
  font-size: 2.3rem;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
  text-shadow: 0 0 15px rgba(0, 240, 255, 0.45);
  line-height: 1.1;
}

.cgpa-main-display .cgpa-scale-label {
  font-size: 0.65rem;
  color: var(--color-text-dark);
  margin-top: 4px;
}

.sgpa-breakdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.sgpa-tile {
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.sgpa-sem {
  font-size: 0.65rem;
  color: var(--color-text-dark);
  margin-bottom: 4px;
}

.sgpa-score-val {
  font-size: 1.3rem;
  font-weight: 700;
  font-family: var(--font-mono);
  margin-bottom: 6px;
}

.text-cyan {
  color: var(--color-cyan);
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.35);
}

.text-lime {
  color: var(--color-lime);
  text-shadow: 0 0 10px rgba(163, 230, 53, 0.35);
}

.sgpa-bar {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 2px;
  overflow: hidden;
}

.sgpa-fill {
  height: 100%;
  border-radius: 2px;
}

.fill-cyan {
  background: var(--color-cyan);
}

.fill-lime {
  background: var(--color-lime);
}

/* Timeline Card */
.timeline-card h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.academic-timeline {
  display: flex;
  flex-direction: column;
  gap: 15px;
  position: relative;
  padding-left: 14px;
  border-left: 1.5px dashed var(--color-border);
}

.timeline-step {
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: -20.5px;
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background-color: var(--color-border);
  border: 2px solid var(--color-bg);
}

.timeline-step.finished .timeline-dot {
  background-color: var(--color-lime);
}

.timeline-step.current .timeline-dot {
  background-color: var(--color-cyan);
  box-shadow: 0 0 6px var(--color-cyan);
}

.timeline-content h5 {
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 2px;
}

.timeline-content p {
  font-size: 0.75rem;
  color: var(--color-text-dark);
}

/* Projects grid and interactive cards */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.project-card-link {
  text-decoration: none;
  color: inherit;
}

.project-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

/* simple elegant border highlights on hover instead of generic glows */
.project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 240, 255, 0.4);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.project-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.proj-badge {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-cyan);
  background-color: rgba(0, 240, 255, 0.06);
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid rgba(0, 240, 255, 0.1);
}

.project-type-icon {
  font-size: 1.1rem;
}

.icon-cyan { color: var(--color-cyan); }
.icon-violet { color: var(--color-violet); }
.icon-lime { color: var(--color-lime); }

.project-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.project-summary {
  font-size: 0.9rem;
  color: var(--color-text-dark);
  margin-bottom: 14px;
}

.project-details {
  font-size: 0.85rem;
  color: var(--color-text-dark);
  margin-bottom: 18px;
  flex-grow: 1; /* Pushes skills to the bottom */
}

.project-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.skill-tag {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--color-text-bright);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 6px;
  border-radius: 3px;
}

.project-card-footer {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-cyan);
  display: flex;
  align-items: center;
  gap: 5px;
}

.project-card-footer i {
  font-size: 0.7rem;
  transition: transform 0.2s ease;
}

.project-card:hover .project-card-footer i {
  transform: translate(2px, -2px);
}

/* Clean copyable email tiles contact layout */
.contact-emails-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
}

.email-tile {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  transition: border-color var(--transition), transform var(--transition);
}

.email-tile:hover {
  border-color: rgba(0, 240, 255, 0.25);
  transform: translateY(-2px);
}

.email-tile-header {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.email-tile-header i {
  font-size: 1.3rem;
  margin-top: 2px;
}

.email-tile-header h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.email-tile-header p {
  font-size: 0.75rem;
  color: var(--color-text-dark);
}

.email-address-row {
  display: flex;
  background-color: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
}

.email-link {
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: var(--color-cyan);
  text-decoration: none;
  word-break: break-all;
}

.btn-copy-mail {
  background: transparent;
  border: none;
  color: var(--color-text-dark);
  cursor: pointer;
  padding: 4px 8px;
  font-size: 0.9rem;
  transition: var(--transition);
}

.btn-copy-mail:hover {
  color: #fff;
  transform: scale(1.1);
}

.btn-copy-mail.copied {
  color: var(--color-lime);
}

@media (max-width: 600px) {
  .contact-emails-container {
    grid-template-columns: 1fr;
  }
}

/* Site Footer */
.main-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  background-color: #07080a;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-text-dark);
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-socials a {
  color: var(--color-text-dark);
  font-size: 1.1rem;
  transition: var(--transition);
}

.footer-socials a:hover {
  color: var(--color-cyan);
  transform: translateY(-1.5px);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  section {
    padding: 50px 0;
  }

  .nav-links {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .social-hero-group {
    justify-content: center;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .footer-container {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}