/* ============================================
   Rudraksha - Cybersecurity Portfolio
   Dark theme, responsive, Cloudflare-ready
   ============================================ */

:root {
  --bg-dark: #0a0e17;
  --bg-card: rgba(15, 23, 42, 0.6);
  --bg-card-hover: rgba(30, 41, 59, 0.5);
  --accent: #22d3ee;
  --accent-dim: #0891b2;
  --accent-green: #10b981;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: rgba(34, 211, 238, 0.2);
  --font-sans: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 12px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

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

/* Loader */
.loader {
  position: fixed;
  inset: 0;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
.loader.hidden {
  opacity: 0;
  visibility: hidden;
}
.loader-inner {
  text-align: center;
}
.loader-text {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  display: block;
  margin-bottom: 1rem;
}
.loader-bar {
  width: 120px;
  height: 3px;
  background: rgba(34, 211, 238, 0.2);
  border-radius: 2px;
  overflow: hidden;
}
.loader-bar::after {
  content: '';
  display: block;
  width: 40%;
  height: 100%;
  background: var(--accent);
  animation: load 1.2s ease-in-out infinite;
}
@keyframes load {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 1.5rem;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}
.navbar.scrolled {
  background: rgba(10, 14, 23, 0.9);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}
.nav-logo:hover {
  color: var(--accent-green);
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover {
  color: var(--accent);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: var(--transition);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 6rem 1.5rem 4rem;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(34, 211, 238, 0.08) 0%, transparent 50%),
              radial-gradient(ellipse 60% 40% at 80% 60%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  text-align: center;
  max-width: 700px;
}
.hero-greeting {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
}
.hero-name {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-title {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.hero-tagline {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: var(--text-muted);
  min-height: 1.5em;
  margin-bottom: 2rem;
}
.hero-tagline .cursor {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}
@keyframes blink {
  50% { opacity: 0; }
}
.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg-dark);
}
.btn-primary:hover {
  background: var(--accent-dim);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(34, 211, 238, 0.3);
}
.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-secondary:hover {
  background: rgba(34, 211, 238, 0.1);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  padding: 0.6rem 1.2rem;
}
.btn-outline:hover {
  background: rgba(34, 211, 238, 0.1);
  border-color: var(--accent);
}
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}
.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(45deg);
  animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50% { transform: rotate(45deg) translateY(6px); }
}

/* Sections */
.section {
  padding: 5rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}
.container {
  max-width: 1000px;
  margin: 0 auto;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  margin-bottom: 2.5rem;
  color: #fff;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 2px;
}

/* About */
.about-grid {
  display: grid;
  gap: 2rem;
}
.about-content p {
  margin-bottom: 1rem;
  color: var(--text-muted);
}
.about-content strong {
  color: var(--accent);
}
.about-highlights ul {
  list-style: none;
}
.about-highlights li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-muted);
}
.about-highlights li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
}

/* Skills */
.skills-category {
  margin-bottom: 2.5rem;
}
.skills-category-title {
  font-size: 1.1rem;
  font-family: var(--font-mono);
  color: var(--accent);
  margin-bottom: 1rem;
  font-weight: 500;
}
.skills-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.skill-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
}
.skill-name {
  font-size: 0.95rem;
  color: var(--text);
}
.skill-bar {
  height: 8px;
  background: rgba(34, 211, 238, 0.15);
  border-radius: 4px;
  overflow: hidden;
  min-width: 120px;
  max-width: 200px;
}
.skill-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  border-radius: 4px;
  transition: width 1s ease-out;
}
.skill-fill.animated {
  width: var(--progress);
}
.tools-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.tool-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  transition: all var(--transition);
}
.tool-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all var(--transition);
}
.project-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(34, 211, 238, 0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.project-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: #fff;
}
.project-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.5;
}
.project-tech {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 1rem;
}
.project-card .btn {
  margin-top: 0.25rem;
}

/* Experience */
.experience-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all var(--transition);
}
.experience-card:hover {
  border-color: rgba(34, 211, 238, 0.3);
}
.experience-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--accent);
}
.experience-card p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.experience-tools {
  list-style: none;
  margin: 1rem 0;
}
.experience-tools li {
  padding: 0.4rem 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}
.experience-tools strong {
  color: var(--accent);
}

/* Certifications */
.certifications-intro {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}
.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
  transition: all var(--transition);
}
.cert-card:hover {
  border-color: var(--accent);
}
.cert-name {
  display: block;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.25rem;
}
.cert-status {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 1rem;
  transition: color var(--transition);
}
.contact-link:hover {
  color: var(--accent-green);
  text-decoration: underline;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact-form label {
  font-size: 0.9rem;
  color: var(--text-muted);
}
.contact-form input,
.contact-form textarea {
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color var(--transition);
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.contact-form textarea {
  resize: vertical;
  min-height: 100px;
}
.form-status {
  font-size: 0.95rem;
  margin-top: 0.5rem;
  min-height: 1.25em;
}
.form-status--success {
  color: var(--accent-green);
}
.form-status--error {
  color: #f87171;
}

/* Footer */
.footer {
  padding: 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Scroll reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    height: 100vh;
    width: 70%;
    max-width: 280px;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    justify-content: center;
    padding: 2rem;
    gap: 2rem;
    transition: right var(--transition);
    border-left: 1px solid var(--border);
  }
  .nav-links.active {
    right: 0;
  }
  .nav-toggle {
    display: flex;
    z-index: 1001;
  }
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  .skill-item {
    grid-template-columns: 1fr;
  }
  .skill-bar {
    max-width: 100%;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 3.5rem 1rem;
  }
}