/* ==========================================================================
   Rishabh Debnath — SEO & Generative Engine Optimization (GEO) Specialist
   Technical Search Engineer Portfolio — Clean, Human, Premium Dark Aesthetic
   ========================================================================== */

:root {
  /* Core Color System */
  --bg-main: #070B12;
  --bg-surface: #0B111C;
  --bg-card: #0D1420;
  --bg-card-hover: #121C2B;
  --bg-glass: rgba(7, 11, 18, 0.85);
  --bg-glass-card: rgba(13, 20, 32, 0.75);
  --bg-input: #080D15;

  /* Borders & Dividers */
  --border-subtle: #1E293B;
  --border-card: #1E293B;
  --border-card-hover: #334155;
  --border-focus: #00E6B8;

  /* Typography Colors */
  --text-primary: #FFFFFF;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-inverse: #070B12;

  /* Accent Colors */
  --accent-primary: #00E6B8;
  --accent-primary-hover: #15f0c2;
  --accent-primary-glow: rgba(0, 230, 184, 0.18);
  --accent-secondary: #3B82F6;
  --accent-secondary-glow: rgba(59, 130, 246, 0.16);

  /* Typography System */
  --font-heading: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Fira Code', monospace;

  /* Layout & Sizing */
  --container-max: 1200px;
  --container-narrow: 880px;
  --header-height: 74px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 160ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 260ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.55);
  --shadow-hover: 0 16px 32px -4px rgba(0, 0, 0, 0.65), 0 0 20px -2px var(--accent-primary-glow);
}

/* Base Reset & Core Setup */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

img, svg, video, canvas, iframe {
  max-width: 100%;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: -0.011em;
  overflow-x: hidden;
  max-width: 100%;
  position: relative;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle Technical Ambient Grid Background */
.bg-grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(0, 230, 184, 0.035) 0%, transparent 55%),
    radial-gradient(circle at 85% 35%, rgba(59, 130, 246, 0.025) 0%, transparent 45%),
    linear-gradient(to right, rgba(255, 255, 255, 0.012) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.012) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 56px 56px, 56px 56px;
  pointer-events: none;
  z-index: 0;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* Typography Hierarchy (Sora & IBM Plex Mono) */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(32px, 4.5vw, 54px);
  font-weight: 700;
  line-height: 1.15;
}

h2 {
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 600;
  line-height: 1.22;
}

h3 {
  font-size: clamp(20px, 2.2vw, 24px);
  font-weight: 600;
  line-height: 1.3;
}

h4 {
  font-size: 18px;
  font-weight: 600;
}

p {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.68;
  margin-bottom: 1.25rem;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-primary-hover);
}

code, .code-tag {
  font-family: var(--font-mono);
  font-size: 0.84em;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  color: var(--accent-secondary);
}

/* Section Header Shared */
.section {
  padding: 112px 0;
  position: relative;
}

.section-header {
  margin-bottom: 56px;
}

.section-header.text-center {
  text-align: center;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-primary);
  background-color: rgba(0, 230, 184, 0.08);
  border: 1px solid rgba(0, 230, 184, 0.25);
  padding: 5px 13px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-title {
  margin-bottom: 16px;
  color: #FFFFFF;
}

.section-desc {
  font-size: 17px;
  max-width: 680px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.text-center .section-desc {
  margin-left: auto;
  margin-right: auto;
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 24px;
  font-family: var(--font-heading);
  font-size: 0.94rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-smooth);
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: var(--text-inverse);
  box-shadow: 0 2px 12px var(--accent-primary-glow);
}

.btn-primary:hover {
  background-color: var(--accent-primary-hover);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-primary-glow);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-card);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-card-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.86rem;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Header & Sticky Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: background-color var(--transition-smooth), backdrop-filter var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  border-bottom: 1px solid transparent;
  background-color: transparent;
}

.site-header.scrolled {
  background-color: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border-subtle);
  box-shadow: 0 8px 24px -6px rgba(0, 0, 0, 0.6);
}

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

/* Brand / Logo Group */
.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  text-decoration: none;
  line-height: 0;
}

.brand-logo img {
  display: block;
  width: 40px !important;
  max-width: 40px !important;
  height: auto !important;
  max-height: 48px !important;
  object-fit: contain;
  position: static;
  transform: scale(1);
  filter: none;
  transition: transform 0.28s ease, filter 0.28s ease;
}

.brand-logo:hover img {
  transform: scale(1.08);
  filter:
    drop-shadow(0 0 4px rgba(0, 255, 200, 0.8))
    drop-shadow(0 0 10px rgba(0, 190, 255, 0.5));
}

.footer .brand-logo img,
footer .brand-logo img,
.site-footer .brand-logo img {
  width: 48px !important;
  max-width: 48px !important;
  height: auto !important;
  max-height: 56px !important;
}

/* Center Navigation Bar */
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  background-color: rgba(13, 20, 32, 0.7);
  padding: 5px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-link:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: var(--accent-primary);
  background-color: rgba(0, 230, 184, 0.1);
  font-weight: 600;
}

/* Header Right Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  cursor: pointer;
  padding: 7px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
}

.mobile-toggle svg {
  width: 20px;
  height: 20px;
  display: block;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding-top: calc(var(--header-height) + 64px);
  padding-bottom: 88px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  background-color: rgba(0, 230, 184, 0.08);
  border: 1px solid rgba(0, 230, 184, 0.22);
  padding: 5px 13px;
  border-radius: var(--radius-full);
  width: fit-content;
}

.status-indicator {
  width: 7px;
  height: 7px;
  background-color: var(--accent-primary);
  border-radius: 50%;
  position: relative;
}

.status-indicator::after {
  content: '';
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border-radius: 50%;
  border: 1px solid var(--accent-primary);
  animation: pulse-ring 2.2s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.8); opacity: 0.8; }
  100% { transform: scale(2.2); opacity: 0; }
}

.hero-title {
  font-size: clamp(32px, 4.4vw, 52px);
  font-weight: 700;
  line-height: 1.16;
  color: #FFFFFF;
  letter-spacing: -0.025em;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.68;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 6px;
}

/* Credibility Pill Badges */
.credibility-wrap {
  margin-top: 14px;
  padding-top: 22px;
  border-top: 1px solid var(--border-subtle);
}

.credibility-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.credibility-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cred-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.cred-badge svg {
  color: var(--accent-primary);
  width: 13px;
  height: 13px;
}

.cred-badge:hover {
  border-color: var(--border-card-hover);
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* Hero Visual Box */
.hero-visual-card {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 12px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-smooth);
  max-width: 360px;
  width: 100%;
  justify-self: end;
}

.hero-visual-card:hover {
  border-color: var(--border-card-hover);
}

.hero-visual-frame {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #070B12;
  border: 1px solid var(--border-subtle);
  aspect-ratio: 4 / 5;
}

.hero-visual-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 18%;
  display: block;
}

/* Hero Fast-Facts Bar */
.hero-fast-facts {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.fact-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition-smooth);
}

.fact-item:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-2px);
}

.fact-icon {
  width: 34px;
  height: 34px;
  background-color: rgba(0, 230, 184, 0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  margin-bottom: 12px;
}

.fact-title {
  font-size: 0.98rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.fact-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.48;
  margin-bottom: 0;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: start;
}

.about-narrative {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.lead-text {
  font-size: 1.15rem;
  line-height: 1.7;
  color: #FFFFFF;
  font-weight: 500;
}

.about-card-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: all var(--transition-smooth);
}

.about-card:hover {
  border-color: var(--accent-primary);
  transform: translateX(4px);
}

.about-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.about-card-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-primary);
  background-color: rgba(0, 230, 184, 0.1);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-card h4 {
  color: var(--text-primary);
  margin-bottom: 0;
  font-size: 1rem;
}

.about-card p {
  font-size: 0.88rem;
  margin-bottom: 0;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ==========================================================================
   Projects / Case Studies Section
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-card);
  position: relative;
}

.project-card-link-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.project-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.project-card:hover .project-title a {
  color: var(--accent-primary);
}

.project-card-header {
  padding: 12px 18px 10px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
  z-index: 2;
}

.project-badge-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
}

.project-category-badge {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--accent-primary);
  background-color: rgba(0, 230, 184, 0.08);
  border: 1px solid rgba(0, 230, 184, 0.22);
  padding: 3px 9px;
  border-radius: var(--radius-full);
  letter-spacing: 0.01em;
  display: inline-flex;
  align-items: center;
}

.project-type-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  text-transform: none;
  letter-spacing: 0.01em;
  display: inline-flex;
  align-items: center;
}

.project-media-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background-color: #070B12;
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-media-wrap img {
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-media-wrap img {
  transform: scale(1.02);
}

.project-body {
  padding: 20px 20px 18px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  position: relative;
  z-index: 2;
}

.project-title {
  font-size: 1.22rem;
  margin-bottom: 4px;
  color: #FFFFFF;
  line-height: 1.3;
}

.project-title a {
  color: #FFFFFF;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.project-subtitle {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}

.project-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.55;
  flex-grow: 1;
}

.project-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}

.tool-chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  background-color: #070B12;
  border: 1px solid var(--border-subtle);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   NEW SECTION: My Approach
   ========================================================================== */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.approach-process-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  transition: all var(--transition-smooth);
}

.approach-process-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.approach-step-num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-primary);
  letter-spacing: -0.03em;
}

.approach-process-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: #FFFFFF;
}

.approach-process-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.62;
  margin-bottom: 0;
}

.approach-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

/* ==========================================================================
   Skills Section (4 Categories + Certifications)
   ========================================================================== */
.skills-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.skill-category-block {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.skill-cat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.skill-cat-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.18rem;
  color: #FFFFFF;
}

.skill-cat-icon {
  width: 30px;
  height: 30px;
  background-color: rgba(0, 230, 184, 0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
}

.skills-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 14px;
}

.skill-item-card {
  background-color: #070B12;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: all var(--transition-smooth);
}

.skill-item-card:hover {
  border-color: var(--border-card-hover);
  background-color: var(--bg-card);
  transform: translateY(-2px);
}

.skill-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.skill-name {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-primary);
}

.skill-level-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-primary);
  background-color: rgba(0, 230, 184, 0.08);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.skill-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 0;
}

/* ==========================================================================
   Certifications Block
   ========================================================================== */
.certifications-wrap {
  margin-top: 48px;
  padding-top: 48px;
  border-top: 1px solid var(--border-subtle);
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.cert-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: all var(--transition-smooth);
}

.cert-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-2px);
}

.cert-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--accent-secondary);
  text-transform: uppercase;
}

.cert-badge-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-primary);
  background-color: rgba(0, 230, 184, 0.08);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.cert-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: #FFFFFF;
}

.cert-summary {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 0;
}

.cert-skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

/* ==========================================================================
   Blog / Personal Articles Section
   ========================================================================== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.blog-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
  position: relative;
}

.blog-card-link-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.blog-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.blog-card:hover .blog-title a {
  color: var(--accent-primary);
}

.blog-card:hover .blog-link {
  color: var(--accent-primary-hover);
  gap: 10px;
}

.blog-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  position: relative;
  z-index: 2;
}

.blog-category {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--accent-primary);
  background-color: rgba(0, 230, 184, 0.08);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
}

.blog-readtime {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
}

.blog-title {
  font-size: 1.2rem;
  color: #FFFFFF;
  margin-bottom: 10px;
  line-height: 1.35;
  position: relative;
  z-index: 2;
}

.blog-title a {
  color: #FFFFFF;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.blog-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.58;
  margin-bottom: 18px;
  flex-grow: 1;
  position: relative;
  z-index: 2;
}

.blog-link {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition-fast), color var(--transition-fast);
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 44px;
  align-items: start;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-card-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 22px;
}

.contact-method-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #070B12;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  transition: all var(--transition-fast);
  min-width: 0;
}

.contact-method-item:hover {
  border-color: var(--border-card-hover);
}

.method-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 1 1 auto;
}

.method-icon {
  width: 32px;
  height: 32px;
  background-color: rgba(0, 230, 184, 0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.method-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.method-value {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-primary);
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* Contact Form */
.contact-form-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 7px;
}

.form-control {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0, 230, 184, 0.12);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

/* Contact Form Status Notification */
.form-status {
  display: none;
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-top: 14px;
  font-size: 0.88rem;
  line-height: 1.5;
  transition: all var(--transition-fast);
}

.form-status.success {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: rgba(0, 230, 184, 0.08);
  border: 1px solid rgba(0, 230, 184, 0.35);
  color: var(--accent-primary);
}

.form-status.error {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #f87171;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background-color: #05080E;
  padding: 44px 0 28px;
  position: relative;
  z-index: 1;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.01em;
}

.footer-brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 10px;
}

.social-btn {
  width: 38px;
  height: 38px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.back-to-top-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  transition: color var(--transition-fast);
}

.back-to-top-btn:hover {
  color: var(--accent-primary);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-visual-card {
    max-width: 320px;
    margin: 0 auto;
  }
  .hero-fast-facts {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .approach-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }
  .brand-logo img {
    width: 36px !important;
    max-width: 36px !important;
    max-height: 42px !important;
  }
  .footer .brand-logo img,
  footer .brand-logo img,
  .site-footer .brand-logo img {
    width: 44px !important;
    max-width: 44px !important;
    max-height: 50px !important;
  }
  .main-nav {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .certifications-grid,
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .hero-fast-facts {
    grid-template-columns: 1fr;
  }
  .hero-section {
    padding-top: calc(var(--header-height) + 32px);
    padding-bottom: 56px;
  }
  .section {
    padding: 76px 0;
  }
  .footer-top,
  .footer-bottom {
    flex-direction: column;
    gap: 18px;
    align-items: center;
    text-align: center;
  }
  .footer-brand {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
    gap: 12px;
  }
}

@media (max-width: 520px) {
  .contact-method-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .contact-method-item .btn {
    width: 100%;
  }
  .contact-card,
  .contact-form-card {
    padding: 20px 16px;
  }
}

@media (max-width: 480px) {
  .hero-visual-card {
    max-width: 270px;
  }
  .projects-grid {
    gap: 16px;
  }
  .project-card-header {
    padding: 10px 14px 8px;
  }
  .project-body {
    padding: 16px 14px 14px;
  }
  .project-title {
    font-size: 1.12rem;
  }
  .project-subtitle {
    font-size: 0.75rem;
    margin-bottom: 8px;
  }
  .project-summary {
    font-size: 0.84rem;
    margin-bottom: 12px;
  }
  .project-tools {
    gap: 5px;
    margin-bottom: 14px;
  }
  .tool-chip {
    font-size: 0.7rem;
    padding: 2px 7px;
  }
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .header-actions {
    gap: 8px;
  }
  .footer-brand {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
  }
}