/* ============================================
   KENJI D. SAKAMOTO - PROFESSIONAL PORTFOLIO
   ============================================ */

/* ===== CSS VARIABLES ===== */
:root {
  --bg-dark: #0a0a0f;
  --bg-section: #11111a;
  --bg-card: #181824;
  --bg-card-hover: #1e1e2d;
  
  --primary: #2563eb;       /* Professional deep blue */
  --primary-dark: #1d4ed8;
  --primary-light: #60a5fa;
  --secondary: #3b82f6;     /* Brighter blue accent */
  --accent: #14b8a6;        /* Teal/Cyan accent for tech */
  
  --text-main: #f3f4f6;     /* Off-white readable text */
  --text-muted: #9ca3af;    /* Light gray for paragraphs */
  --text-light: #d1d5db;
  
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(37, 99, 235, 0.4);
  
  --gradient: linear-gradient(135deg, #2563eb 0%, #14b8a6 100%);
  --gradient-hover: linear-gradient(135deg, #1d4ed8 0%, #0d9488 100%);
  
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 16px 48px rgba(37, 99, 235, 0.15);
  --glow: 0 0 20px rgba(37, 99, 235, 0.4);
  
  --radius: 12px;
  --radius-sm: 6px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

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

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: #374151;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* ===== TYPOGRAPHY ===== */
h1,
h2,
h3,
h4 {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-family: 'Inter', sans-serif;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary-dark);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-main);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

/* ===== SECTION COMMONS ===== */
.section-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 120px 24px;
}

.section-header {
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary-light);
  margin-bottom: 12px;
  position: relative;
  padding-left: 48px;
}

.section-tag::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 1px;
  background: var(--primary);
}

.section-title {
  font-size: clamp(2.2rem, 4vw, 3rem);
  color: var(--text-main);
  font-weight: 800;
}

/* ===== SOCIAL ICONS ===== */
.social-icons,
.footer-socials,
.contact-socials {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  font-size: 1.1rem;
  background: rgba(108, 99, 255, 0.12);
  border: 1px solid var(--border);
  color: var(--primary-light);
  transition: var(--transition);
}

.social-icon:hover {
  background: var(--gradient);
  color: #fff;
  border-color: transparent;
  transform: translateY(-4px) scale(1.1);
  box-shadow: var(--shadow-hover);
}

/* Instagram gradient on hover */
.social-icon[aria-label="Instagram"]:hover {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.social-icon[aria-label="GitHub"]:hover {
  background: #333;
}

.social-icon[aria-label="LinkedIn"]:hover {
  background: #0077b5;
}

.social-icon[aria-label="freeCodeCamp"]:hover {
  background: #0a0a23;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -1px;
}

.nav-logo span {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  transition: var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient);
  border-radius: 2px;
  transition: width 0.3s ease;
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  background: var(--bg-dark);
  background-image: radial-gradient(circle at 100% 0%, rgba(37, 99, 235, 0.08) 0%, transparent 40%),
                    radial-gradient(circle at 0% 100%, rgba(20, 184, 166, 0.05) 0%, transparent 40%);
}

.hero-container {
  max-width: 1100px;
  width: 100%;
  padding: 120px 24px 60px;
  display: flex;
  align-items: center;
  gap: 8vh;
  justify-content: space-between;
}

.hero-text {
  flex: 1;
  max-width: 650px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(20, 184, 166, 0.1);
  border: 1px solid rgba(20, 184, 166, 0.2);
  border-radius: 50px;
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(20, 184, 166, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(20, 184, 166, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(20, 184, 166, 0); }
}

.hero-name {
  font-size: clamp(3rem, 6vw, 4.5rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 12px;
  letter-spacing: -0.03em;
}

.hero-title {
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  font-weight: 500;
  color: var(--text-light);
  margin-bottom: 24px;
  min-height: 45px;
  font-family: 'Inter', sans-serif;
}

.typed-text {
  color: var(--primary-light);
}

.cursor {
  color: var(--primary);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 580px;
  line-height: 1.8;
}

.hero-desc strong {
  color: var(--text-main);
  font-weight: 600;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

/* Hero Avatar */
.hero-image {
  flex-shrink: 0;
  position: relative;
  width: clamp(280px, 30vw, 400px);
  aspect-ratio: 1/1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-blob {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 2;
  transition: var(--transition-slow);
}

.hero-image:hover .avatar-blob {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}

.blob-ring {
  position: absolute;
  width: 105%;
  height: 105%;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(37, 99, 235, 0.3);
  top: 15px;
  left: 15px;
  z-index: 1;
  transition: var(--transition-slow);
}

.hero-image:hover .blob-ring {
  transform: translate(-5px, -5px);
  border-color: var(--primary);
}

.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1.2rem;
  color: var(--primary-light);
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  50% {
    transform: translateX(-50%) translateY(10px);
  }
}

/* ===== ABOUT SECTION ===== */
.about {
  background: var(--bg-section);
  position: relative;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 8vh;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.about-avatar {
  width: 100%;
  aspect-ratio: 4/5;
  border-radius: var(--radius);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition-slow);
}

.about-avatar:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

.about-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--bg-card-hover);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  box-shadow: var(--shadow);
}

.about-badge i {
  font-size: 1.2rem;
  color: var(--primary);
}

.about-content h3 {
  font-size: 2rem;
  color: var(--text-main);
  margin-bottom: 8px;
}

.about-subtitle {
  font-size: 0.95rem;
  color: var(--primary-light);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}

.about-content p {
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.8;
  font-size: 1.05rem;
}

.about-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 32px 0;
}

.info-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  transition: var(--transition);
}

.info-card:hover {
  background: rgba(37, 99, 235, 0.05);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.info-card i {
  font-size: 1.2rem;
  color: var(--primary);
  margin-top: 2px;
  flex-shrink: 0;
}

.info-card div {
  display: flex;
  flex-direction: column;
}

.info-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
  font-weight: 600;
}

.info-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
}

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

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  transition: var(--transition);
}

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

.skill-category h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.skill-category h3 i {
  color: var(--primary);
  font-size: 1.3rem;
}

.skill-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.skill-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: default;
}

.skill-item:hover {
  background: rgba(37, 99, 235, 0.08);
  border-color: rgba(37, 99, 235, 0.3);
  transform: translateY(-2px);
}

.skill-icon {
  font-size: 2rem;
  color: var(--text-light);
  transition: var(--transition);
}

.skill-item:hover .skill-icon {
  color: var(--primary-light);
}

.skill-item span {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-align: center;
}

/* ===== EXPERIENCE TIMELINE ===== */
.experience {
  background: var(--bg-section);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20px;
  height: 100%;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  margin-bottom: 48px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: 13px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--primary);
  transition: var(--transition);
  z-index: 2;
}

.timeline-item:hover .timeline-dot {
  background: var(--primary);
  box-shadow: 0 0 12px var(--primary);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}

.timeline-item:hover .timeline-content {
  border-color: var(--border-hover);
  transform: translateX(5px);
  box-shadow: var(--shadow);
}

.timeline-date {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--primary-light);
  margin-bottom: 8px;
}

.timeline-content h3 {
  font-size: 1.4rem;
  color: var(--text-main);
  margin-bottom: 4px;
}

.timeline-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 16px;
}

.timeline-content p {
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== PORTFOLIO SECTION ===== */
.portfolio {
  background: var(--bg-dark);
}

.portfolio-filter {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}

.filter-btn:hover,
.filter-btn.active {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-light);
  border-color: var(--primary);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.portfolio-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition-slow);
  display: flex;
  flex-direction: column;
}

.portfolio-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

/* Featured Card */
.portfolio-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  background: linear-gradient(to right, var(--bg-card), var(--bg-card-hover));
}

@media (max-width: 900px) {
  .portfolio-card--featured {
    grid-template-columns: 1fr;
  }
}

.card-image {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background-color: #1a1a24;
}

.card-image--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.portfolio-card:hover .card-image--photo img {
  transform: scale(1.03);
}

/* For placeholder image divs */
.web1 { background: linear-gradient(135deg, #1d4ed8, #0f172a); }
.app1 { background: linear-gradient(135deg, #0f766e, #0f172a); }
.web2 { background: linear-gradient(135deg, #6d28d9, #0f172a); }
.design1 { background: linear-gradient(135deg, #be185d, #0f172a); }
.app2 { background: linear-gradient(135deg, #b45309, #0f172a); }
.web3 { background: linear-gradient(135deg, #0369a1, #0f172a); }
.hardware1 { background: linear-gradient(135deg, #b91c1c, #0f172a); }
.hardware2 { background: linear-gradient(135deg, #ea580c, #0f172a); }

.card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.portfolio-card:hover .card-overlay {
  opacity: 1;
}

.card-links {
  display: flex;
  gap: 16px;
  transform: translateY(20px);
  transition: var(--transition-slow);
}

.portfolio-card:hover .card-links {
  transform: translateY(0);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.card-link:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.card-body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  margin-bottom: 12px;
}

.card-tag--hardware {
  color: var(--primary-light);
}

.card-body h3 {
  font-size: 1.4rem;
  color: var(--text-main);
  margin-bottom: 16px;
}

.card-body p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.7;
  flex: 1;
}

.card-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-light);
}

/* ===== CONTACT SECTION ===== */
.contact {
  background: var(--bg-section);
  position: relative;
}

.contact::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h3 {
  font-size: 1.8rem;
  color: var(--text-main);
  margin-bottom: 16px;
}

.contact-info p {
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.8;
  font-size: 1.05rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 40px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary-light);
  flex-shrink: 0;
}

.contact-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-value {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-main);
}

.contact-form {
  background: var(--bg-card);
  padding: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-light);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  color: var(--text-main);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-success {
  display: none;
  background: rgba(20, 184, 166, 0.1);
  color: var(--accent);
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(20, 184, 166, 0.2);
  margin-top: 24px;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
}

.form-success.show {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  padding: 60px 0 24px;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 48px;
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: center;
  text-align: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-bottom strong {
  color: var(--text-main);
  font-weight: 600;
}

/* ===== SCROLL TO TOP ===== */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.5);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.scroll-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 8px 30px rgba(108, 99, 255, 0.6);
}

/* ===== FEATURED PORTFOLIO CARD (Robotics Arm) ===== */
.portfolio-card--featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: stretch;
}

.portfolio-card--featured .card-image {
  height: 100%;
  min-height: 280px;
}

.portfolio-card--featured .card-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.portfolio-card--featured .card-body p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* Photo card-image override */
.card-image--photo {
  background: #fff;
  overflow: hidden;
}

.card-image--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.portfolio-card:hover .card-image--photo img {
  transform: scale(1.04);
}

/* Hardware category tag */
.card-tag--hardware {
  background: rgba(255, 140, 50, 0.12);
  color: #ff9f43;
  border: 1px solid rgba(255, 140, 50, 0.25);
}

/* Tech badge stack */
.card-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}

.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: 50px;
  background: rgba(108, 99, 255, 0.1);
  border: 1px solid rgba(108, 99, 255, 0.2);
  color: var(--primary-light);
  letter-spacing: 0.3px;
}

.tech-badge i {
  font-size: 0.75rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {

  /* Navbar */
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 1px solid var(--border);
    padding: 40px;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-link {
    font-size: 1.1rem;
  }

  .hamburger {
    display: flex;
  }

  /* Hero */
  .hero-container {
    flex-direction: column-reverse;
    text-align: center;
    padding-top: 100px;
  }

  .hero-buttons,
  .social-icons {
    justify-content: center;
  }

  .hero-image {
    width: 220px;
    height: 220px;
  }

  .avatar-blob {
    width: 180px;
    height: 180px;
  }

  .blob-ring {
    width: 210px;
    height: 210px;
  }

  .avatar-initials {
    font-size: 2.8rem;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about-subtitle {
    justify-content: center;
  }

  .about-info-grid {
    grid-template-columns: 1fr;
  }

  .about-badge {
    right: 30px;
  }

  /* Skills */
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .progress-section {
    grid-template-columns: 1fr;
  }

  /* Portfolio */
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  /* Featured card collapses to single column on mobile */
  .portfolio-card--featured {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }

  .portfolio-card--featured .card-image {
    height: 220px;
  }


  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 28px 20px;
  }

  /* Footer */
  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-links {
    flex-direction: column;
    gap: 12px;
  }

  .section-container {
    padding: 70px 20px;
  }
}

@media (max-width: 480px) {
  .hero-name {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    justify-content: center;
  }
}