/* ==========================================================================
   01 Folder - Multi-page Portfolio: Global Styles & Design System
   ========================================================================== */
:root {
  /* Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #ffffff;
  --bg-card-border: rgba(226, 232, 240, 0.85);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --accent-primary: #2563eb;
  --accent-secondary: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #4f46e5 50%, #7c3aed 100%);
  --accent-gradient-subtle: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(79, 70, 229, 0.08) 100%);
  --accent-light: rgba(37, 99, 235, 0.1);
  --accent-border: rgba(37, 99, 235, 0.25);

  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 25px rgba(37, 99, 235, 0.25);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --nav-height: 74px;
  --font-main: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-code: 'Fira Code', monospace;
}

[data-theme="dark"] {
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-card: rgba(15, 23, 42, 0.85);
  --bg-card-hover: #1e293b;
  --bg-card-border: rgba(51, 65, 85, 0.65);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-light: #64748b;

  --accent-primary: #60a5fa;
  --accent-secondary: #818cf8;
  --accent-gradient: linear-gradient(135deg, #60a5fa 0%, #818cf8 50%, #a78bfa 100%);
  --accent-gradient-subtle: linear-gradient(135deg, rgba(96, 165, 250, 0.12) 0%, rgba(129, 140, 248, 0.12) 100%);
  --accent-light: rgba(96, 165, 250, 0.15);
  --accent-border: rgba(96, 165, 250, 0.35);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.7), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 35px rgba(96, 165, 250, 0.35);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

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

ul {
  list-style: none;
}

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
  background: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Header & Global Navigation (Multi-page)
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(var(--bg-primary), 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--bg-card-border);
  transition: all var(--transition-normal);
}

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

.logo {
  font-family: var(--font-code);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 2px;
}

.logo-bracket {
  color: var(--accent-primary);
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--accent-primary);
  background: var(--accent-light);
}

.nav-link.active {
  color: var(--accent-primary);
  background: var(--accent-light);
  font-weight: 700;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--bg-card-border);
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--accent-primary);
  transform: rotate(15deg) scale(1.05);
}

[data-theme="light"] .dark-icon { display: block; }
[data-theme="light"] .light-icon { display: none; }
[data-theme="dark"] .dark-icon { display: none; }
[data-theme="dark"] .light-icon { display: block; color: #fbbf24; }

.mobile-menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 1.25rem;
  background: var(--bg-tertiary);
}

/* ==========================================================================
   Page Header Banner (Subpages)
   ========================================================================== */
.page-banner {
  padding: 60px 0 50px;
  background: var(--accent-gradient-subtle);
  border-bottom: 1px solid var(--bg-card-border);
  position: relative;
  overflow: hidden;
}

.page-banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.page-banner-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.page-banner-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 700px;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 18px;
}
.breadcrumb a:hover { color: var(--accent-primary); }
.breadcrumb-separator { font-size: 0.75rem; }

/* ==========================================================================
   Common Section & Component Styles
   ========================================================================== */
.section-wrapper {
  padding: 70px 0;
}

.section-head {
  margin-bottom: 40px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-primary);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-heading {
  font-size: 1.95rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 26px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-outline {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--bg-card-border);
}

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

.btn-sm {
  padding: 8px 16px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Home Page Specific Styles (index.html)
   ========================================================================== */
.hero-wrapper {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 15% 30%, var(--accent-light) 0%, transparent 45%),
              radial-gradient(circle at 85% 75%, rgba(124, 58, 237, 0.08) 0%, transparent 45%);
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 24px;
}

.pulse-circle {
  width: 9px;
  height: 9px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 0 rgba(16, 185, 129, 0.6);
  animation: pulseAnim 2s infinite;
}

@keyframes pulseAnim {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-main-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -1px;
  margin-bottom: 18px;
}

.gradient-txt {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.typing-container {
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 24px;
  min-height: 42px;
  display: flex;
  align-items: center;
}

.typing-target {
  color: var(--accent-primary);
  font-weight: 700;
  margin-left: 6px;
}

.cursor-blink {
  display: inline-block;
  width: 2px;
  background-color: var(--accent-primary);
  animation: blinkCursor 1s infinite;
  margin-left: 2px;
}

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

.hero-lead-text {
  font-size: 1.12rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 34px;
  max-width: 560px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

.social-bar {
  display: flex;
  align-items: center;
  gap: 14px;
}

.social-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-btn:hover {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* Hero Visual & Profile Glass Box */
.hero-visual-box {
  position: relative;
  display: flex;
  justify-content: center;
}

.glow-backdrop {
  position: absolute;
  width: 340px;
  height: 340px;
  background: var(--accent-gradient);
  filter: blur(70px);
  opacity: 0.28;
  border-radius: 50%;
  z-index: 1;
}

.hero-profile-card {
  position: relative;
  z-index: 2;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-xl);
  max-width: 380px;
  width: 100%;
}

.profile-avatar-box {
  width: 120px;
  height: 120px;
  margin: 0 auto 20px;
  border-radius: 50%;
  padding: 4px;
  background: var(--accent-gradient);
  box-shadow: var(--shadow-glow);
}

.profile-avatar-inner {
  width: 100%;
  height: 100%;
  background: var(--bg-tertiary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.2rem;
  color: var(--accent-primary);
}

.code-terminal {
  background: #0f172a;
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: var(--font-code);
  font-size: 0.84rem;
  color: #e2e8f0;
  box-shadow: inset 0 2px 5px rgba(0,0,0,0.5);
}

.terminal-header {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
}

.term-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.term-dot.r { background-color: #ef4444; }
.term-dot.y { background-color: #f59e0b; }
.term-dot.g { background-color: #10b981; }

.code-body { line-height: 1.6; }
.code-kw { color: #f43f5e; }
.code-var { color: #38bdf8; }
.code-prop { color: #a78bfa; }
.code-str { color: #4ade80; }
.code-num { color: #fbbf24; }

/* Strength Highlights Grid */
.strength-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.strength-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

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

.strength-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--accent-light);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
}

.strength-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.strength-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Stats Counter Row */
.stats-banner {
  background: var(--accent-gradient-subtle);
  border-top: 1px solid var(--bg-card-border);
  border-bottom: 1px solid var(--bg-card-border);
  padding: 50px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.stat-item-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent-primary);
  line-height: 1;
}

.stat-item-suffix {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-secondary);
}

.stat-item-label {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* Testimonials Carousel/Cards */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

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

.quote-icon {
  font-size: 1.8rem;
  color: var(--accent-primary);
  opacity: 0.4;
  margin-bottom: 14px;
}

.testimonial-text {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--bg-card-border);
  padding-top: 18px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
}

.author-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==========================================================================
   About Page Specific Styles (about.html)
   ========================================================================== */
.about-story-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 50px;
  align-items: center;
}

.story-lead {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.story-paragraph {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 18px;
}

.story-highlight-box {
  background: var(--accent-gradient-subtle);
  border-left: 4px solid var(--accent-primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-top: 24px;
  font-weight: 600;
  color: var(--text-primary);
}

.profile-card-detailed {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-md);
}

.profile-detail-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
}

.profile-detail-item {
  display: flex;
  justify-content: space-between;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--bg-card-border);
  font-size: 0.92rem;
}

.detail-label {
  font-weight: 600;
  color: var(--text-muted);
}

.detail-val {
  font-weight: 600;
  color: var(--text-primary);
}

/* Principles / Values Grid */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.principle-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.principle-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-md);
}

.principle-number {
  position: absolute;
  top: 14px;
  right: 18px;
  font-size: 2.2rem;
  font-weight: 800;
  font-family: var(--font-code);
  color: var(--accent-primary);
  opacity: 0.15;
}

.principle-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.principle-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Lifestyle / Hobbies Grid */
.hobby-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.hobby-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition-fast);
}

.hobby-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-md);
}

.hobby-icon {
  font-size: 2.4rem;
  margin-bottom: 14px;
  display: inline-block;
}

.hobby-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.hobby-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Interview Q&A Section */
.interview-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.interview-item {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
}

.interview-q {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.interview-a {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: 28px;
}

/* ==========================================================================
   Skills Page Specific Styles (skills.html)
   ========================================================================== */
.skill-category-full {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 36px;
  box-shadow: var(--shadow-sm);
}

.category-full-header {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--bg-card-border);
}

.category-full-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.category-full-icon.fe { background: rgba(37, 99, 235, 0.15); color: #2563eb; }
.category-full-icon.be { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.category-full-icon.ops { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }
.category-full-icon.tools { background: rgba(139, 92, 246, 0.15); color: #8b5cf6; }

.category-full-title {
  font-size: 1.45rem;
  font-weight: 800;
}

.category-full-subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.skill-items-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.skill-detailed-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: all var(--transition-fast);
}

.skill-detailed-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-md);
}

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

.skill-name-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.skill-name-wrap i {
  font-size: 1.35rem;
}

.skill-name {
  font-size: 1.1rem;
  font-weight: 700;
}

.skill-level-badge {
  font-size: 0.76rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--accent-light);
  color: var(--accent-primary);
}

.skill-progress-bar {
  width: 100%;
  height: 6px;
  background: var(--bg-card-border);
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  overflow: hidden;
}

.skill-progress-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  transition: width 1s ease-in-out;
}

.skill-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Roadmap Grid */
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.roadmap-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  border-top: 4px solid var(--accent-primary);
}

.roadmap-status {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.roadmap-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.roadmap-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Projects Page Specific Styles (projects.html)
   ========================================================================== */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.filter-tab-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  transition: all var(--transition-fast);
}

.filter-tab-btn:hover,
.filter-tab-btn.active {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.projects-masonry {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 36px;
}

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

.project-item-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-border);
}

.project-item-card.hide {
  display: none;
}

.project-banner-thumb {
  height: 220px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.grad-blue { background: linear-gradient(135deg, #1e40af, #3b82f6); }
.grad-purple { background: linear-gradient(135deg, #5b21b6, #8b5cf6); }
.grad-emerald { background: linear-gradient(135deg, #065f46, #10b981); }
.grad-amber { background: linear-gradient(135deg, #92400e, #f59e0b); }
.grad-rose { background: linear-gradient(135deg, #9f1239, #f43f5e); }
.grad-cyan { background: linear-gradient(135deg, #155e75, #06b6d4); }

.thumb-visual-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.thumb-visual-icon {
  font-size: 3.2rem;
  opacity: 0.95;
}

.thumb-type-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  color: #ffffff;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

.project-card-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.p-tag {
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--accent-light);
  color: var(--accent-primary);
  padding: 3px 9px;
  border-radius: 4px;
}

.project-card-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.project-card-summary {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 18px;
}

.problem-solution-box {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ps-item {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.ps-item strong {
  color: var(--text-primary);
}

.project-card-footer {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--bg-card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.project-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-open-modal {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-open-modal:hover {
  text-decoration: underline;
}

/* Modal Popup */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-content-box {
  background: var(--bg-primary);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 36px;
  position: relative;
  box-shadow: var(--shadow-xl);
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-backdrop.open .modal-content-box {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.modal-close-btn:hover {
  background: var(--accent-primary);
  color: #ffffff;
}

/* ==========================================================================
   Career Page Specific Styles (career.html)
   ========================================================================== */
.career-timeline {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}

.career-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 9px;
  width: 2px;
  height: 100%;
  background: var(--bg-card-border);
}

.career-entry {
  position: relative;
  margin-bottom: 48px;
}

.career-entry:last-child {
  margin-bottom: 0;
}

.career-node {
  position: absolute;
  top: 4px;
  left: -40px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 4px solid var(--bg-primary);
  box-shadow: 0 0 0 4px var(--accent-light);
}

.career-period {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-primary);
  background: var(--accent-light);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 10px;
}

.career-card-content {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.career-card-content:hover {
  transform: translateX(6px);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-md);
}

.career-company-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.career-position {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-secondary);
  margin-bottom: 16px;
}

.career-achievements {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
}

.career-achievements li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 20px;
  line-height: 1.6;
}

.career-achievements li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: #10b981;
  font-weight: bold;
}

/* Certifications & Awards */
.awards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.award-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: all var(--transition-fast);
}

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

.award-icon-box {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.award-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.award-issuer {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.award-date {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-primary);
}

/* ==========================================================================
   Contact Page Specific Styles (contact.html)
   ========================================================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 48px;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-quick-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  transition: all var(--transition-fast);
}

.contact-quick-card:hover {
  transform: translateX(6px);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-sm);
}

.c-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-light);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.c-info-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

.c-info-val {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Form Styling */
.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.form-group-item label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group-item input,
.form-group-item textarea,
.form-group-item select {
  width: 100%;
  padding: 13px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  border: 1px solid var(--bg-card-border);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-group-item input:focus,
.form-group-item textarea:focus,
.form-group-item select:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* FAQ Accordion */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 860px;
  margin: 0 auto;
}

.faq-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.faq-card.active {
  border-color: var(--accent-border);
}

.faq-question-btn {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: left;
}

.faq-icon {
  font-size: 0.95rem;
  color: var(--accent-primary);
  transition: transform var(--transition-fast);
}

.faq-card.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.7;
}

.faq-card.active .faq-answer {
  max-height: 300px;
  padding-bottom: 22px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--bg-card-border);
  padding: 60px 0 40px;
  margin-top: auto;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand-title {
  font-family: var(--font-code);
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  margin-bottom: 12px;
}

.footer-brand-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.footer-bottom-row {
  border-top: 1px solid var(--bg-card-border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.86rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.toast-box {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast-msg {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(12px);
  color: var(--text-primary);
  font-size: 0.92rem;
  font-weight: 600;
  animation: slideInToast 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.toast-msg.success { border-left-color: #10b981; }
.toast-msg.error { border-left-color: #ef4444; }

@keyframes slideInToast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Scroll Fade In */
.fade-in-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-up.active {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-layout,
  .about-story-layout,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .strength-grid,
  .hobby-grid,
  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .principles-grid,
  .testimonials-grid,
  .roadmap-grid,
  .awards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 66px;
  }

  .page-banner {
    padding: 40px 0 35px;
  }

  .page-banner-title {
    font-size: 2rem;
  }

  .hero-main-title {
    font-size: 2.3rem;
  }

  .typing-container {
    font-size: 1.15rem;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--bg-card-border);
    padding: 24px 0;
    box-shadow: var(--shadow-xl);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
  }

  .nav-menu.open {
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .strength-grid,
  .hobby-grid,
  .principles-grid,
  .testimonials-grid,
  .roadmap-grid,
  .awards-grid,
  .skill-items-grid,
  .projects-masonry,
  .form-row,
  .footer-top-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

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