/* ==========================================================================
   Design System & Modern Styling
   ========================================================================== */

:root {
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Color Palette - Dark by default */
  --bg-primary: #0a0d14;
  --bg-secondary: #111622;
  --bg-card: rgba(19, 26, 42, 0.7);
  --bg-card-hover: rgba(28, 38, 62, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(56, 189, 248, 0.5);

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

  --accent-cyan: #38bdf8;
  --accent-blue: #3b82f6;
  --accent-indigo: #6366f1;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;

  --gradient-accent: linear-gradient(135deg, #38bdf8 0%, #6366f1 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0) 100%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.15);

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

  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: #ffffff;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(14, 165, 233, 0.5);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --gradient-accent: linear-gradient(135deg, #0284c7 0%, #4f46e5 100%);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 25px rgba(14, 165, 233, 0.15);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(99, 102, 241, 0.05) 0%, transparent 45%);
}

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

/* ==========================================================================
   Typography & Elements
   ========================================================================== */

h1, h2, h3, h4, h5 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
}

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

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

/* Icons */
.icon, .icon-inline {
  width: 18px;
  height: 18px;
  vertical-align: middle;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
}

.btn-primary {
  background: var(--gradient-accent);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.4);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color);
  backdrop-filter: blur(10px);
}

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

.btn-outline {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 13, 20, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

[data-theme="light"] .header {
  background: rgba(248, 250, 252, 0.85);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
}

.logo-symbol {
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

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

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.nav-link:hover {
  color: var(--accent-cyan);
}

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

.theme-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.theme-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.sun-icon { display: none; width: 20px; height: 20px; }
.moon-icon { display: block; width: 20px; height: 20px; }

[data-theme="light"] .sun-icon { display: block; }
[data-theme="light"] .moon-icon { display: none; }

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  padding: 90px 0 60px;
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 860px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 3.2rem;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 680px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 60px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  width: 100%;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-number {
  font-size: 1.6rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

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

/* ==========================================================================
   Section Headers
   ========================================================================== */

.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 50px;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ==========================================================================
   Skills Section
   ========================================================================== */

.scale-banner {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  margin-bottom: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.scale-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.scale-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  font-size: 0.82rem;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.chip-n {
  font-weight: 700;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

.chip.active {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

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

.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.skill-category-card:hover {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-glow);
}

.category-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.category-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
}

.category-icon svg {
  width: 24px;
  height: 24px;
}

.category-header h3 {
  font-size: 1.25rem;
}

.category-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.skill-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skill-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.skill-lvl {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.badge-1 { background: rgba(148, 163, 184, 0.15); color: #94a3b8; }
.badge-2 { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.badge-3 { background: rgba(16, 185, 129, 0.15); color: #34d399; }

.skill-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-full);
  overflow: hidden;
}

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

.lvl-1 { width: 20%; background: #94a3b8; }
.lvl-2 { width: 45%; background: var(--accent-blue); }
.lvl-3 { width: 70%; background: var(--accent-green); }

.skill-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ==========================================================================
   Projects Section
   ========================================================================== */

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

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
}

.project-card.featured {
  border-color: rgba(56, 189, 248, 0.3);
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.08);
}

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

.project-badge-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.sso-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

.infra-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(56, 189, 248, 0.15);
  color: #7dd3fc;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

.status-live {
  font-size: 0.8rem;
  color: var(--accent-green);
  font-weight: 600;
}

.project-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.euro-coin-icon {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #fff;
  font-size: 1.8rem;
  font-weight: 800;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.infra-icon {
  background: linear-gradient(135deg, #38bdf8 0%, #2563eb 100%);
  color: #fff;
}

.infra-icon svg {
  width: 28px;
  height: 28px;
}

.project-title {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.project-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 20px;
}

.feature-tag {
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.project-security-notice {
  background: rgba(99, 102, 241, 0.08);
  border: 1px dashed rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 24px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.82rem;
  color: #c7d2fe;
}

.project-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 30px;
}

.project-tech-tags span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

/* ==========================================================================
   Services Section
   ========================================================================== */

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

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

.service-tile:hover {
  transform: translateY(-2px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-sm);
}

.service-tile.highlight {
  border-color: rgba(99, 102, 241, 0.4);
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.08) 0%, rgba(19, 26, 42, 0.7) 100%);
}

.service-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 1.3rem;
  font-weight: 800;
  flex-shrink: 0;
}

.service-icon svg {
  width: 22px;
  height: 22px;
}

.service-details {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.service-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.service-head h4 {
  font-size: 1.05rem;
}

.service-badge, .service-lock {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.service-badge {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
}

.service-lock {
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
}

.service-details p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.service-link {
  font-size: 0.85rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-top: 4px;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  background: var(--bg-secondary);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-left {
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-bio {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 60px;
}

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

.footer-col h5 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.footer-col a {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-col a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 992px) {
  .hero-title { font-size: 2.6rem; }
  .skills-grid, .projects-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  .nav-links { display: none; }
  .hero-title { font-size: 2.1rem; }
  .hero-stats { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .scale-banner { flex-direction: column; align-items: flex-start; }
  .footer-container { flex-direction: column; }
}

/* AI Disclaimer Banner */
.ai-banner {
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.15) 0%, rgba(56, 189, 248, 0.15) 100%);
  border-bottom: 1px solid rgba(99, 102, 241, 0.3);
  padding: 10px 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.ai-banner-container {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.ai-pill {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.25);
  color: #a5b4fc;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border: 1px solid rgba(165, 180, 252, 0.3);
}

.ai-text {
  margin: 0;
  line-height: 1.4;
}

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