/* ========================================
   DESIGN SYSTEM - VULKANOS
   ======================================== */

:root {
  /* Colors */
  --primary: #e94560;
  --primary-dark: #c7364d;
  --primary-light: #f05a74;
  --secondary: #0f3460;
  --secondary-light: #1a5a8f;
  --bg-dark: #0a0e27;
  --bg-darker: #050810;
  --bg-card: #141829;
  --bg-hover: #1f2438;
  --text-primary: #ffffff;
  --text-secondary: #e0e0e0;
  --text-muted: #a0a0a0;
  --text-light: #808080;
  --border-color: #2a2a3a;
  --border-light: #3a3a4a;
  --success: #4ade80;
  --warning: #facc15;
  --error: #ef4444;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #0f3460 0%, #e94560 100%);
  --gradient-hover: linear-gradient(135deg, #1a5a8f 0%, #f05a74 100%);
  --gradient-text: linear-gradient(135deg, #0f3460 0%, #e94560 100%);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(233, 69, 96, 0.3);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Courier New', monospace;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-secondary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: var(--spacing-md);
}

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

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

/* ========================================
   NAVIGATION BAR
   ======================================== */

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.navbar-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 5px var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-img {
  width: 60px;
  height: 60px;
  filter: drop-shadow(0 0 8px rgba(233, 69, 96, 0.4));
}

.nav-menu {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  transition: color var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-base);
}

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

@media (max-width: 768px) {
  .nav-menu {
    gap: var(--spacing-lg);
    font-size: 0.9rem;
  }
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 50%, rgba(233, 69, 96, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(15, 52, 96, 0.1) 0%, transparent 50%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  animation: fadeInUp 0.8s ease-out;
}

.logo-container {
  /*margin-bottom: var(--spacing-2xl);*/
  animation: float 3s ease-in-out infinite;
}

.hero-logo {
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 0 20px rgba(233, 69, 96, 0.5));
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 900;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--text-muted);
  font-weight: 300;
  margin-bottom: var(--spacing-md);
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(233, 69, 96, 0.5);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}

/* ========================================
   CONTAINER & SECTIONS
   ======================================== */

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

section {
  padding: var(--spacing-3xl) 0;
  border-top: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-md);
}

.section-header h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  margin: var(--spacing-md) auto 0;
  border-radius: var(--radius-full);
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-top: var(--spacing-lg);
}

/* ========================================
   PORTFOLIO SECTION
   ======================================== */

.portfolio-section {
  background: linear-gradient(180deg, transparent 0%, rgba(233, 69, 96, 0.05) 100%);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

/* ========================================
   PROJECT CARDS
   ======================================== */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  animation: slideUp 0.5s ease-out;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 0%, rgba(233, 69, 96, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
  transform: translateY(-8px);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover::after {
  opacity: 1;
}

.card h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  font-size: 1.4rem;
}

.card .desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-lg);
  flex-grow: 1;
  line-height: 1.6;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: auto;
}

.tech-tag {
  background: linear-gradient(135deg, rgba(15, 52, 96, 0.3) 0%, rgba(233, 69, 96, 0.1) 100%);
  color: #8ab4f8;
  font-size: 0.75rem;
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  border: 1px solid rgba(138, 180, 248, 0.3);
  transition: all var(--transition-base);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tech-tag:hover {
  background: linear-gradient(135deg, rgba(15, 52, 96, 0.5) 0%, rgba(233, 69, 96, 0.2) 100%);
  border-color: rgba(138, 180, 248, 0.6);
  transform: translateY(-2px);
}

/* ========================================
   LOADING & ERROR STATES
   ======================================== */

.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl);
  gap: var(--spacing-lg);
}

.spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.error-message {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  color: var(--error);
  margin: var(--spacing-2xl) 0;
}

/* ========================================
   ABOUT SECTION
   ======================================== */

.about-section {
  background: linear-gradient(180deg, rgba(233, 69, 96, 0.05) 0%, transparent 100%);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

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

.tech-stack h3 {
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.tech-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
}

.tech-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  text-align: center;
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.tech-item:hover {
  border-color: var(--primary);
  background: var(--bg-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   CONTACT SECTION
   ======================================== */

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

.contact-content {
  display: flex;
  gap: var(--spacing-2xl);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-2xl);
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
  color: var(--text-secondary);
  transition: all var(--transition-base);
  font-weight: 500;
}

.contact-link:hover {
  border-color: var(--primary);
  background: var(--bg-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.contact-icon {
  font-size: 1.5rem;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) var(--spacing-lg);
  margin-top: var(--spacing-3xl);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  text-align: center;
}

.footer-content p {
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
}

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

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-2xl: 2rem;
    --spacing-3xl: 2.5rem;
  }

  .navbar-container {
    padding: var(--spacing-md);
  }

  .nav-menu {
    gap: var(--spacing-md);
    font-size: 0.85rem;
  }

  .hero {
    min-height: 80vh;
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .hero-cta {
    gap: var(--spacing-md);
  }

  .btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 0.9rem;
  }

  section {
    padding: var(--spacing-2xl) 0;
  }

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

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

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

  .contact-content {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .contact-link {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-logo {
    max-width: 150px;
  }

  .card {
    padding: var(--spacing-lg);
  }

  .tech-list {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
  .navbar,
  .hero-cta,
  .footer {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .card {
    page-break-inside: avoid;
  }
}