/* ============================================
   RESPONSIVE PORTFOLIO CSS
   Mobile-First Design with Modern Features
   ============================================ */

:root {
  /* Color Palette */
  --primary: #181c2f;
  --secondary: #ffb86b;
  --accent: #00e6d0;
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.15);
  --text-main: #f4f4f4;
  --text-muted: rgba(244, 244, 244, 0.7);
  --shadow-color: rgba(0, 230, 208, 0.15);
  --shadow-hover: rgba(0, 230, 208, 0.25);

  /* Spacing */
  --container-padding: clamp(1rem, 5vw, 3rem);
  --section-spacing: clamp(3rem, 8vw, 6rem);
  --element-gap: clamp(1rem, 3vw, 2rem);

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-size-xs: clamp(0.75rem, 2vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 2.5vw, 1rem);
  --font-size-base: clamp(1rem, 3vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 3.5vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 4vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 5vw, 2rem);
  --font-size-3xl: clamp(2rem, 6vw, 2.5rem);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-bounce: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-family);
  background: var(--primary);
  color: var(--text-main);
  background-image: linear-gradient(120deg, #181c2f 0%, #232a4d 70%, #2e3a5c 100%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ============================================
   LOADING SCREEN
   ============================================ */

.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--glass-border);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

/* ============================================
   LAYOUT & CONTAINERS
   ============================================ */

main {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

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

.hero-container {
  width: 100%;
  padding: 0 var(--container-padding);
}

/* ============================================
   HERO SECTION - MOBILE FIRST
   ============================================ */

.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 0;
  position: relative;
}

.hero-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--element-gap);
  margin-bottom: 3rem;
  width: 100%;
}

.person-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  padding: 2rem 1.5rem;
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.person-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
  transition: left 0.6s ease;
}

.person-card:hover::before {
  left: 100%;
}

.person-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow:
    0 16px 40px var(--shadow-hover),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.photo-link {
  display: block;
  transition: transform var(--transition-normal);
}

.hero-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  margin-bottom: 1rem;
  transition: all var(--transition-normal);
}

.photo-link:hover .hero-photo {
  transform: scale(1.05);
  box-shadow: 0 0 20px var(--shadow-hover);
}

.hero-title {
  font-size: var(--font-size-2xl);
  color: var(--accent);
  margin: 0 0 0.5rem 0;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-animated-text {
  font-size: var(--font-size-lg);
  color: var(--secondary);
  margin-bottom: 1rem;
  font-weight: 500;
  min-height: 2em;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

@keyframes blink {

  0%,
  50% {
    opacity: 1;
  }

  51%,
  100% {
    opacity: 0;
  }
}

.hero-summary {
  font-size: var(--font-size-base);
  line-height: 1.7;
  opacity: 0.9;
  margin: 0;
  max-width: 400px;
}

.center-icon {
  display: flex;
  justify-content: center;
  align-items: center;
  order: -1;
}

.center-icon img {
  width: clamp(60px, 12vw, 80px);
  height: auto;
  border-radius: 50%;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-bounce);
}

.center-icon:hover img {
  transform: scale(1.1) rotate(5deg);
}

/* 3D Model Section */
.model-section {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

.hero-3d-col {
  width: 100%;
  max-width: 600px;
}

.hero-3d-container {
  width: 100%;
  height: 300px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.loading-model {
  color: var(--text-muted);
  font-size: var(--font-size-base);
}

/* ============================================
   CONTENT SECTIONS
   ============================================ */

.content-section {
  padding: var(--section-spacing) 0;
  border-top: 1px solid var(--glass-border);
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.content-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.section-title {
  text-align: center;
  font-size: var(--font-size-3xl);
  color: var(--text-main);
  margin-bottom: 3rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-main), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(to right, var(--accent), var(--secondary));
  border-radius: 2px;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.project-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-normal);
  opacity: 0;
  transform: translateY(20px);
  position: relative;
}

.project-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.project-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: 0 20px 50px var(--shadow-hover);
}

.project-image {
  position: relative;
  overflow: hidden;
  height: 220px;
}

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

.project-card:hover .project-image img {
  transform: scale(1.1);
}

.project-info {
  padding: 1.5rem;
}

.project-info h3 {
  font-size: var(--font-size-xl);
  color: var(--accent);
  margin: 0 0 0.75rem 0;
  font-weight: 600;
}

.project-info p {
  font-size: var(--font-size-base);
  line-height: 1.6;
  opacity: 0.9;
  margin-bottom: 1rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tech-tag {
  background: rgba(0, 230, 208, 0.1);
  color: var(--accent);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  border: 1px solid rgba(0, 230, 208, 0.2);
  transition: all var(--transition-fast);
}

.tech-tag:hover {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-2px);
}

.show-more-container {
  text-align: center;
  margin-top: 2rem;
}

.show-more-btn {
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  color: var(--primary);
  border: none;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 15px rgba(0, 230, 208, 0.3);
}

.show-more-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 230, 208, 0.4);
}

/* ============================================
   SKILLS SECTIONS
   ============================================ */

.skills-container {
  display: grid;
  gap: 3rem;
}

.skills-category h3 {
  font-size: var(--font-size-xl);
  color: var(--secondary);
  margin-bottom: 1rem;
  font-weight: 600;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
}

.skill-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 1rem;
  text-align: center;
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--text-main);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.skill-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.1;
  transition: left 0.5s ease;
}

.skill-item:hover::before {
  left: 100%;
}

.skill-item:hover {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 8px 25px var(--shadow-hover);
}

/* Soft Skills Grid */
.soft-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.soft-skill-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
}

.soft-skill-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 35px var(--shadow-hover);
}

.skill-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.soft-skill-item h4 {
  font-size: var(--font-size-lg);
  color: var(--text-main);
  margin: 0;
  font-weight: 600;
}

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

.contact-container {
  display: grid;
  gap: 3rem;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-form-wrapper {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1rem 1rem 0;
  border: none;
  border-bottom: 2px solid var(--glass-border);
  background: transparent;
  color: var(--text-main);
  font-size: var(--font-size-base);
  font-family: inherit;
  transition: all var(--transition-normal);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-bottom-color: var(--accent);
}

.form-group label {
  position: absolute;
  top: 1rem;
  left: 0;
  color: var(--text-muted);
  font-size: var(--font-size-base);
  pointer-events: none;
  transition: all var(--transition-normal);
}

.form-group input:focus+label,
.form-group input:not(:placeholder-shown)+label,
.form-group textarea:focus+label,
.form-group textarea:not(:placeholder-shown)+label {
  top: -0.5rem;
  font-size: var(--font-size-sm);
  color: var(--accent);
}

.submit-btn {
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  color: var(--primary);
  border: none;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-size: var(--font-size-lg);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.submit-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 230, 208, 0.4);
}

.btn-loader {
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top: 2px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: none;
  margin-left: 0.5rem;
}

.submit-btn.loading .btn-loader {
  display: block;
}

.form-message {
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
  font-weight: 500;
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
}

.form-message.success {
  background: rgba(0, 230, 208, 0.1);
  color: var(--accent);
  border: 1px solid rgba(0, 230, 208, 0.3);
  opacity: 1;
  transform: translateY(0);
}

.form-message.error {
  background: rgba(255, 99, 99, 0.1);
  color: #ff6363;
  border: 1px solid rgba(255, 99, 99, 0.3);
  opacity: 1;
  transform: translateY(0);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  transition: all var(--transition-normal);
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px var(--shadow-color);
}

.contact-icon {
  font-size: 1.5rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.contact-details h4 {
  font-size: var(--font-size-lg);
  color: var(--text-main);
  margin: 0 0 0.5rem 0;
  font-weight: 600;
}

.contact-details a {
  color: var(--accent);
  text-decoration: none;
  font-size: var(--font-size-base);
  transition: color var(--transition-fast);
  display: block;
  margin-bottom: 0.25rem;
}

.contact-details a:hover {
  color: var(--secondary);
}

.contact-details p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--font-size-base);
}

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

.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 2rem;
  border-top: 1px solid var(--glass-border);
  background: var(--glass-bg);
}

.site-footer p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--font-size-base);
}

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

.animated-card {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.animated-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.animated-section {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s ease;
}

.animated-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Small tablets and large phones */
@media (min-width: 480px) {
  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }

  .soft-skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

/* Tablets */
@media (min-width: 768px) {
  .hero-row {
    flex-direction: row;
    align-items: stretch;
    justify-content: center;
    gap: 2rem;
  }

  .person-card {
    flex: 1 1 320px;
    max-width: 380px;
  }

  .center-icon {
    flex: 0 0 auto;
    order: 0;
    margin: 0 1rem;
  }

  .hero-3d-container {
    height: 400px;
  }

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

  .contact-container {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

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

  .soft-skills-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .hero-row {
    gap: 3rem;
  }

  .person-card {
    max-width: 420px;
  }

  .hero-photo {
    width: 140px;
    height: 140px;
  }

  .hero-3d-container {
    height: 500px;
  }

  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .soft-skills-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Large desktop */
@media (min-width: 1200px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
  }

  .hero-3d-container {
    height: 600px;
  }
}

/* ============================================
   ACCESSIBILITY & UTILITIES
   ============================================ */

/* Focus states */
button:focus,
input:focus,
textarea:focus,
a:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.3);
  }
}

/* Dark mode adjustments for better visibility */
@media (prefers-color-scheme: dark) {
  :root {
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
  }
}