/* ============================================================
   CYBERSECURITY PORTFOLIO — MASTER STYLESHEET
   "Terminal meets Enterprise" Design System
   ============================================================ */

/* ==================== CSS VARIABLES ==================== */
:root {
  /* Background Scale */
  --bg-primary:    #0d1117;
  --bg-secondary:  #131920;
  --bg-tertiary:   #1a2332;
  --bg-card:       #161e2e;
  --bg-card-hover: #1c2840;

  /* Border */
  --border-primary: rgba(0, 255, 102, 0.15);
  --border-secondary: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(0, 255, 102, 0.4);

  /* Accent Colors */
  --accent-green:  #00ff66;
  --accent-blue:   #00d4ff;
  --accent-teal:   #00ffcc;
  --accent-purple: #b77cff;
  --accent-red:    #ff4757;
  --accent-yellow: #ffd32a;

  /* Glow Effects */
  --glow-green:  0 0 20px rgba(0, 255, 102, 0.35), 0 0 60px rgba(0, 255, 102, 0.12);
  --glow-blue:   0 0 20px rgba(0, 212, 255, 0.35), 0 0 60px rgba(0, 212, 255, 0.12);
  --glow-purple: 0 0 20px rgba(183, 124, 255, 0.35), 0 0 60px rgba(183, 124, 255, 0.12);

  /* Text Scale */
  --text-primary:   #e8edf5;
  --text-secondary: #8899b0;
  --text-muted:     #4f6070;
  --text-accent:    #00ff66;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  /* Spacing */
  --section-padding: 6rem 0;
  --container-max:   1200px;
  --container-pad:   1.5rem;

  /* Transitions */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:   300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Border Radius */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
}

/* ==================== RESET & BASE ==================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

/* ==================== SCROLLBAR ==================== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
  background: rgba(0, 255, 102, 0.3);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent-green); }

/* ==================== UTILITY ==================== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section {
  padding: var(--section-padding);
  position: relative;
}

.accent { color: var(--accent-green); }

/* Selection */
::selection {
  background: rgba(0, 255, 102, 0.25);
  color: #fff;
}

/* ==================== NAVIGATION ==================== */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 1.5rem;
  height: 72px;
  display: flex;
  align-items: center;
  background: rgba(13, 17, 23, 0.55);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-secondary);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.nav-header.scrolled {
  background: rgba(13, 17, 23, 0.92);
  border-bottom-color: var(--border-primary);
}

.nav-container {
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: opacity var(--transition-fast);
}
.nav-logo:hover { opacity: 0.85; }
.logo-bracket { color: var(--accent-green); }
.logo-text { color: var(--text-primary); }
.logo-cursor {
  color: var(--accent-green);
  animation: blink 1.1s step-start infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  position: relative;
  padding: 0.45rem 0.85rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: var(--accent-green);
  border-radius: 2px;
  transition: transform var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-green);
  background: rgba(0, 255, 102, 0.06);
}

.nav-link.active::after,
.nav-link:hover::after {
  transform: translateX(-50%) scaleX(1);
}

/* Hamburger Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}
.nav-toggle:hover { background: rgba(255,255,255,0.06); }
.nav-toggle .bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition-base);
}
.nav-toggle.open .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--accent-green);
}
.nav-toggle.open .bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle.open .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--accent-green);
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(13, 17, 23, 0.97);
  backdrop-filter: blur(20px);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}
.mobile-nav-overlay.open {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.mobile-nav-link {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--text-secondary);
  padding: 0.5rem 1.5rem;
  transition: color var(--transition-fast);
}
.mobile-nav-link:hover { color: var(--accent-green); }

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.925rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-green);
  color: #000;
  border-color: var(--accent-green);
}
.btn-primary:hover {
  box-shadow: var(--glow-green);
  transform: translateY(-2px);
  background: #1aff7a;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.18);
}
.btn-outline:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
  background: rgba(0, 255, 102, 0.06);
  transform: translateY(-2px);
}

.btn-full { width: 100%; justify-content: center; }

/* ==================== SECTION HEADER ==================== */
.section-header {
  margin-bottom: 3.5rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-green);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-divider {
  width: 3.5rem;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-green), transparent);
  border-radius: 3px;
}

/* ==================== HERO SECTION ==================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 7rem 1.5rem 4rem;
}

/* Animated grid bg */
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 255, 102, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 102, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: grid-scroll 20s linear infinite;
  pointer-events: none;
}

@keyframes grid-scroll {
  0%   { background-position: 0 0; }
  100% { background-position: 50px 50px; }
}

/* Radial highlight */
.hero-section::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(
    ellipse at center,
    rgba(0, 255, 102, 0.07) 0%,
    transparent 70%
  );
  pointer-events: none;
}

/* Particle canvas */
.particle-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
}

.hero-content {
  position: relative;
  max-width: var(--container-max);
  margin: 0 auto;
  width: 100%;
  z-index: 1;
}

/* Status Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: rgba(0, 255, 102, 0.08);
  border: 1px solid rgba(0, 255, 102, 0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-green);
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 0 0 rgba(0, 255, 102, 0.5);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%   { box-shadow: 0 0 0 0 rgba(0, 255, 102, 0.5); }
  70%  { box-shadow: 0 0 0 8px rgba(0, 255, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 255, 102, 0); }
}

.hero-greeting {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
  font-family: var(--font-mono);
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.05;
  margin-bottom: 0.5rem;
}

.hero-title {
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.title-static { color: var(--text-secondary); }
.title-dynamic {
  color: var(--accent-green);
  font-family: var(--font-mono);
  font-weight: 700;
  border-right: 2px solid var(--accent-green);
  padding-right: 4px;
  animation: blink 1.1s step-start infinite;
  white-space: nowrap;
  overflow: hidden;
}

.hero-headline {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #fff 40%, var(--accent-green) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

/* ==================== TERMINAL WIDGET ==================== */
.terminal-widget {
  background: #0a0d13;
  border: 1px solid rgba(0, 255, 102, 0.2);
  border-radius: var(--radius-lg);
  max-width: 640px;
  box-shadow:
    0 0 0 1px rgba(0, 255, 102, 0.04),
    0 25px 60px rgba(0, 0, 0, 0.6),
    inset 0 1px 0 rgba(255,255,255,0.04);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.terminal-widget:hover {
  border-color: rgba(0, 255, 102, 0.4);
  box-shadow: var(--glow-green), 0 25px 60px rgba(0,0,0,0.6);
}

.terminal-titlebar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(0, 255, 102, 0.1);
}

.terminal-dots { display: flex; gap: 6px; }
.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot-red    { background: #ff5f57; }
.dot-yellow { background: #ffbd2e; }
.dot-green  { background: #28c840; }

.terminal-title {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

.terminal-secure-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-green);
  display: flex;
  align-items: center;
  gap: 4px;
  opacity: 0.7;
}

.terminal-body {
  padding: 1.25rem 1.5rem;
  min-height: 180px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.terminal-output { margin-bottom: 0.5rem; }

.term-line {
  display: block;
  line-height: 1.8;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.term-prompt { color: var(--accent-green); }
.term-cmd    { color: #aed6f1; }
.term-output-line { color: var(--text-secondary); padding-left: 1rem; }
.term-success { color: var(--accent-green); }
.term-info    { color: var(--accent-blue); }
.term-warning { color: var(--accent-yellow); }

.terminal-input-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.terminal-prompt { color: var(--accent-green); font-weight: 600; }
.terminal-cursor-blink {
  color: var(--accent-green);
  animation: blink 1s step-start infinite;
  font-weight: 400;
}

/* ==================== ABOUT SECTION ==================== */
.about-section {
  background: var(--bg-secondary);
}
.about-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-primary), transparent);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-xl);
  padding: 2rem;
  transition: border-color var(--transition-base);
}
.about-card:hover { border-color: var(--border-primary); }

.about-bio {
  color: var(--text-secondary);
  font-size: 0.975rem;
  margin-bottom: 1.25rem;
  line-height: 1.85;
}
.about-bio:last-of-type { margin-bottom: 1.5rem; }

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tag {
  padding: 0.3rem 0.75rem;
  background: rgba(0, 255, 102, 0.07);
  border: 1px solid rgba(0, 255, 102, 0.15);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--accent-green);
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.5rem;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}
.stat-card.full-width {
  grid-column: 1 / -1;
}
.stat-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--glow-green);
}

.stat-icon {
  font-size: 1.5rem;
  color: var(--accent-green);
  display: flex;
  align-items: center;
}
.stat-number {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==================== SKILLS SECTION ==================== */
.skills-section {
  background: var(--bg-primary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}
.skill-category-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}
.skill-category-card:hover .skill-cat-icon.red  { box-shadow: 0 0 20px rgba(255, 71, 87, 0.4); }
.skill-category-card:hover .skill-cat-icon.blue  { box-shadow: 0 0 20px rgba(0, 212, 255, 0.4); }
.skill-category-card:hover .skill-cat-icon.teal  { box-shadow: 0 0 20px rgba(0, 255, 204, 0.4); }
.skill-category-card:hover .skill-cat-icon.purple{ box-shadow: 0 0 20px rgba(183, 124, 255, 0.4); }

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.skill-cat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
  transition: box-shadow var(--transition-base);
}
.skill-cat-icon.red    { background: rgba(255, 71, 87, 0.12);  color: var(--accent-red);    border: 1px solid rgba(255, 71, 87, 0.25); }
.skill-cat-icon.blue   { background: rgba(0, 212, 255, 0.12);  color: var(--accent-blue);   border: 1px solid rgba(0, 212, 255, 0.25); }
.skill-cat-icon.teal   { background: rgba(0, 255, 204, 0.12);  color: var(--accent-teal);   border: 1px solid rgba(0, 255, 204, 0.25); }
.skill-cat-icon.purple { background: rgba(183, 124, 255, 0.12);color: var(--accent-purple); border: 1px solid rgba(183, 124, 255, 0.25); }

.skill-cat-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}
.skill-cat-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

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

.skill-tag {
  padding: 0.3rem 0.7rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.77rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.skill-tag:hover {
  background: rgba(0, 255, 102, 0.08);
  border-color: rgba(0, 255, 102, 0.3);
  color: var(--accent-green);
}

/* ==================== PROJECTS SECTION ==================== */
.projects-section {
  background: var(--bg-secondary);
}
.projects-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-primary), transparent);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}
.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-5px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.4), var(--glow-green);
}
.project-card:hover::before { transform: scaleX(1); }

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

.project-icon {
  width: 44px;
  height: 44px;
  background: rgba(0, 255, 102, 0.1);
  border: 1px solid rgba(0, 255, 102, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--accent-green);
}

.project-badge {
  padding: 0.2rem 0.65rem;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.project-badge.active   { background: rgba(0, 255, 102, 0.12); color: var(--accent-green);  border: 1px solid rgba(0, 255, 102, 0.3); }
.project-badge.complete { background: rgba(0, 212, 255, 0.12); color: var(--accent-blue);   border: 1px solid rgba(0, 212, 255, 0.3); }
.project-badge.research { background: rgba(183,124,255, 0.12); color: var(--accent-purple); border: 1px solid rgba(183,124,255, 0.3); }

.project-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
}

.project-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.75;
  flex: 1;
}

.project-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tech-tag {
  padding: 0.2rem 0.6rem;
  background: rgba(0, 212, 255, 0.07);
  border: 1px solid rgba(0, 212, 255, 0.18);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-blue);
}

.project-links {
  display: flex;
  gap: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border-secondary);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: rgba(0, 255, 102, 0.1);
  color: var(--accent-green);
  border-color: rgba(0, 255, 102, 0.25);
  transition: all var(--transition-fast);
}
.btn-link:hover {
  background: rgba(0, 255, 102, 0.18);
  box-shadow: 0 0 12px rgba(0, 255, 102, 0.2);
}
.btn-link-outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border-secondary);
}
.btn-link-outline:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.15);
  box-shadow: none;
}

/* ==================== CERTIFICATIONS SECTION ==================== */
.certs-section { background: var(--bg-primary); }

.certs-education-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: 1100px;
  margin: 0 auto;
  gap: 3rem;
  align-items: start;
}

.sub-heading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.sub-heading i { color: var(--accent-green); }

.certs-grid {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: border-color var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
}
.cert-card:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
  box-shadow: var(--glow-green);
}

.cert-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}
.cert-icon.oscp   { background: rgba(255,71,87,0.15);   color: var(--accent-red);    border: 1px solid rgba(255,71,87,0.3); }
.cert-icon.ceh    { background: rgba(0,212,255,0.12);   color: var(--accent-blue);   border: 1px solid rgba(0,212,255,0.3); }
.cert-icon.secplus{ background: rgba(0,255,102,0.12);   color: var(--accent-green);  border: 1px solid rgba(0,255,102,0.3); }
.cert-icon.cissp  { background: rgba(183,124,255,0.12); color: var(--accent-purple); border: 1px solid rgba(183,124,255,0.3); }
.cert-icon.aws    { background: rgba(255,189,42,0.12);  color: var(--accent-yellow); border: 1px solid rgba(255,189,42,0.3); }
.cert-icon.gcih   { background: rgba(0,255,204,0.12);   color: var(--accent-teal);   border: 1px solid rgba(0,255,204,0.3); }

.cert-info { flex: 1; }
.cert-name   { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); margin-bottom: 2px; }
.cert-issuer { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 0.4rem; }
.cert-meta   { display: flex; align-items: center; gap: 0.75rem; }
.cert-date   { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); display: flex; align-items: center; gap: 4px; }
.cert-status { font-size: 0.72rem; font-weight: 600; }
.cert-status.valid { color: var(--accent-green); }

/* Education Timeline */
.education-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-left: 1rem;
  border-left: 2px solid rgba(0, 255, 102, 0.15);
}

.education-item {
  position: relative;
  padding-left: 1.25rem;
}

.edu-timeline-dot {
  position: absolute;
  left: -1.45rem;
  top: 0.3rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-green);
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 8px rgba(0, 255, 102, 0.4);
}

.edu-degree {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}
.edu-institution {
  font-size: 0.85rem;
  color: var(--accent-green);
  margin-bottom: 0.4rem;
  font-weight: 500;
}
.edu-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}
.edu-meta span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}
.edu-notes {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==================== CONTACT SECTION ==================== */
.contact-section {
  background: var(--bg-secondary);
}
.contact-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-primary), transparent);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
  align-items: start;
}

.contact-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 2rem;
}

.contact-links { display: flex; flex-direction: column; gap: 0.85rem; }

.contact-link-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
}
.contact-link-item:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
  box-shadow: var(--glow-green);
}

.contact-link-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.email-icon    { background: rgba(0, 255, 102, 0.1);   color: var(--accent-green);  border: 1px solid rgba(0, 255, 102, 0.2); }
.github-icon   { background: rgba(255,255,255,0.06);   color: var(--text-secondary); border: 1px solid rgba(255,255,255,0.1); }
.linkedin-icon { background: rgba(0, 119, 181, 0.15); color: #0e76a8;              border: 1px solid rgba(0, 119, 181, 0.3); }

.contact-link-label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 2px; }
.contact-link-value { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); }

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }

.form-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.form-input,
.form-textarea {
  background: var(--bg-card);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  resize: none;
}
.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-muted); }
.form-input:focus,
.form-textarea:focus {
  border-color: rgba(0, 255, 102, 0.4);
  box-shadow: 0 0 0 3px rgba(0, 255, 102, 0.08);
}
.form-input.error,
.form-textarea.error {
  border-color: rgba(255, 71, 87, 0.5);
  box-shadow: 0 0 0 3px rgba(255, 71, 87, 0.08);
}

.form-feedback {
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  display: none;
}
.form-feedback.success {
  display: block;
  background: rgba(0, 255, 102, 0.08);
  border: 1px solid rgba(0, 255, 102, 0.25);
  color: var(--accent-green);
}
.form-feedback.error-msg {
  display: block;
  background: rgba(255, 71, 87, 0.08);
  border: 1px solid rgba(255, 71, 87, 0.25);
  color: var(--accent-red);
}

/* ==================== FOOTER ==================== */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-secondary);
  padding: 1.75rem 1.5rem;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer-links { display: flex; gap: 0.5rem; }
.footer-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 1.1rem;
  border: 1px solid var(--border-secondary);
  transition: all var(--transition-fast);
}
.footer-icon:hover {
  color: var(--accent-green);
  border-color: rgba(0, 255, 102, 0.3);
  background: rgba(0, 255, 102, 0.06);
}

/* ==================== BACK TO TOP ==================== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-green);
  font-size: 1.1rem;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  box-shadow: var(--glow-green);
  transform: translateY(-3px);
}

/* ==================== ANIMATIONS & SCROLL REVEAL ==================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal-stagger.visible > *:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 0.05s; }
.reveal-stagger.visible > *:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 0.1s; }
.reveal-stagger.visible > *:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 0.15s; }
.reveal-stagger.visible > *:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 0.2s; }
.reveal-stagger.visible > *:nth-child(5) { opacity: 1; transform: translateY(0); transition-delay: 0.25s; }
.reveal-stagger.visible > *:nth-child(6) { opacity: 1; transform: translateY(0); transition-delay: 0.3s; }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
  .about-grid           { grid-template-columns: 1fr; }
  .certs-education-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root { --section-padding: 4rem 0; }

  .nav-links       { display: none; }
  .nav-toggle      { display: flex; }

  .hero-section { padding-top: 6rem; }

  .contact-wrapper { grid-template-columns: 1fr; }

  .projects-grid   { grid-template-columns: 1fr; }
  .stats-grid      { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  :root { --container-pad: 1rem; }

  .hero-cta        { flex-direction: column; }
  .btn             { width: 100%; justify-content: center; }

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

  .project-links   { flex-direction: column; }
  .btn-link        { justify-content: center; }

  .footer-inner    { flex-direction: column; align-items: center; text-align: center; }
}