/* =====================================================
   ROOT VARIABLES & THEMES
   ===================================================== */
:root {
  /* Colors */
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --border-color: #e5e7eb;
  --error-color: #ef4444;
  --success-color: #10b981;
  --warning-color: #f59e0b;

  /* Typography */
  --font-family: 'Inter', sans-serif;
  --font-size-xs: 0.875rem;
  --font-size-sm: 0.9rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3rem;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height: 1.6;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 5rem;
  --spacing-4xl: 8rem;

  /* Layout */
  --container-max-width: 1200px;
  --container-padding: 0 1.5rem;
  --header-height: 80px;
  --section-padding: 5rem 0;
  --grid-columns-2: 1fr 1fr;
  --gap: 1rem;
  --grid-gap: 2rem;
  --grid-gap-lg: 3rem;

  /* Border & Shadows */
  --border-radius-sm: 4px;
  --border-radius-md: 6px;
  --border-radius-lg: 12px;
  --border-radius-xl: 20px;
  --border-radius-full: 50%;
  --shadow-sm: 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 20px rgba(99, 102, 241, 0.2);

  /* Transitions & Animations */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease;
  --transition-bounce: cubic-bezier(0.4, 0, 0.2, 1);
  --backdrop-blur: blur(10px);

  /* Background Gradients */
  --bg-gradient: linear-gradient(
    rgba(249, 250, 251, 0.95),
    rgb(249, 250, 251, 0.6)
  );
  --gradient-primary: linear-gradient(90deg, var(--primary-color), #ec4899);
  --gradient-card: linear-gradient(135deg, var(--primary-color), #764ba2);

  /* Z-index layers */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;

  /* Decorative elements */
  --section-title-line-width: 80px;
  --section-title-line-height: 4px;
  --section-title-line-radius: 2px;
}

/* Dark theme overrides */
.dark-theme {
  --primary-color: #818cf8;
  --primary-hover: #6366f1;
  --text-primary: #f3f4f6;
  --text-secondary: #d1d5db;
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --border-color: #374151;
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --bg-gradient: linear-gradient(rgba(31, 41, 55, 0.95), rgba(31, 41, 55, 0.7));
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: var(--line-height);
  transition: var(--transition-normal);
}

/* =====================================================
   LAYOUT & CONTAINER
   ===================================================== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--container-padding);
}

/* =====================================================
   TYPOGRAPHY
   ===================================================== */
h1 {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-3xl);
}
h3 {
  font-size: var(--font-size-2xl);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-base);
}

.section-title {
  text-align: center;
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-2xl);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: var(--section-title-line-width);;
  height: var(--section-title-line-height);
  background-color: var(--primary-color);
  border-radius: var(--section-title-line-radius);
}

/* Gradient text utility */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* =====================================================
   BUTTONS & INTERACTIVE ELEMENTS
   ===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-color);
  color: white;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius-md);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
  gap: var(--spacing-sm);
}

.btn:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
  background-color: var(--primary-color);
  color: white;
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-xs);
}

/* =====================================================
   FORM ELEMENTS
   ===================================================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: var(--font-weight-medium);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: var(--transition-normal);
  font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* Form validation */
.form-input.error,
.form-textarea.error {
  border-color: var(--error-color);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.error-message {
  color: var(--error-color);
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-xs);
}

/* =====================================================
   HEADER & NAVIGATION
   ===================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background-color: var(--bg-primary);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  height: var(--header-height);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

/* Logo styles */
.logo {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition-normal);
  margin-left: var(--spacing-sm);
}

.logo:hover {
  transform: scale(1.05);
}

.logo-bg {
  fill: var(--primary-color);
}
.logo-initials {
  fill: white;
}
.logo-name {
  fill: var(--primary-color);
}
.logo-title {
  fill: var(--text-secondary);
}

/* Navigation */
nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: var(--transition-normal);
}

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

/* Controls (theme & language) */
.controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-right: var(--spacing-2xl);
}

.theme-toggle,
.lang-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  transition: var(--transition-normal);
}

.theme-toggle:hover,
.lang-toggle:hover {
  color: var(--primary-color);
}

.lang-select {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-xs);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-right: var(--spacing-lg);
  z-index: var(--z-dropdown);
}

.menu-toggle span {
  width: 100%;
  height: 3px;
  background-color: var(--text-primary);
  border-radius: 3px;
  transition: var(--transition-normal);
  transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero {
  padding: var(--spacing-4xl) 0 var(--spacing-3xl);
  background: var(--bg-gradient), url('../images/textures/hero-bg.svg');
  background-size: cover;
  text-align: center;
}

.dark-theme .hero {
  background: var(--bg-gradient), url('../images/textures/hero-bg-dark.svg');
}

.hero-section {
  display: inline-flex;
  justify-self: center;
  gap: var(--spacing-2xl);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  margin-bottom: var(--spacing-md);
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

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

.hero-photo {
  position: relative;
  display: inline-block;
}

.hero-photo img.photo {
  position: relative;
  z-index: 2;
  border-radius: 0 0 10% 10%;
}

.hero-blurred-photo {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120%;
  height: 120%;
  transform: translate(-50%, -50%);
  background: radial-gradient(
    circle,
    rgba(0, 123, 255, 0.6) 0%,
    transparent 70%
  );
  filter: blur(40px);
  border-radius: 0 0 10% 10%;
  z-index: 1;
}

/* =====================================================
   ABOUT SECTION
   ===================================================== */
.about-content {
  display: grid;
  grid-template-columns: var(--grid-columns-2);
  gap: var(--grid-gap-lg);
  align-items: center;
}

.about-text h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xl);
}

.about-text p {
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
}

.about-image {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease;
}

.about-image:hover img {
  transform: scale(1.05);
}

/* =====================================================
   COMMON SECTION STYLES
   ===================================================== */
section {
  padding: var(--section-padding);
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* Section background patterns */
.about {
  background: var(--bg-gradient), url('../images/textures/about-bg.svg');
  background-size: cover;
}

.skills {
  background: var(--bg-gradient), url('../images/textures/skills-bg.svg');
  background-size: cover;
}

.education {
  background: var(--bg-gradient), url('../images/textures/education-bg.svg');
  background-size: cover;
}

.projects {
  background: var(--bg-gradient), url('../images/textures/projects-bg.svg');
  background-size: cover;
}

.qa {
  background: var(--bg-gradient), url('../images/textures/qa-bg.svg');
  background-size: cover;
}

.contact {
  background: var(--bg-gradient), url('../images/textures/contact-bg.svg');
  background-size: cover;
}

/* Dark theme backgrounds */
.dark-theme .about {
  background: var(--bg-gradient), url('../images/textures/about-bg-dark.svg');
}
.dark-theme .skills {
  background: var(--bg-gradient), url('../images/textures/skills-bg-dark.svg');
}
.dark-theme .education {
  background: var(--bg-gradient),
    url('../images/textures/education-bg-dark.svg');
}
.dark-theme .projects {
  background: var(--bg-gradient), url('../images/textures/projects-bg-dark.svg');
}
.dark-theme .qa {
  background: var(--bg-gradient), url('../images/textures/qa-bg-dark.svg');
}
.dark-theme .contact {
  background: var(--bg-gradient), url('../images/textures/contact-bg-dark.svg');
}

/* =====================================================
   CARDS & CONTENT BLOCKS
   ===================================================== */
/* Base card styles */
.card {
  background-color: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  overflow: hidden;
}

.card:hover,
.skill-card:hover,
.project-card:hover,
.education-item:hover,
.category-breakdown:hover,
.skills-interactive:hover,
.contact-form:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

/* Specific card types */
.skill-card,
.project-card,
.education-item,
.category-breakdown,
.skills-interactive,
.contact-form {
  background-color: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  overflow: hidden;
  padding: var(--spacing-xl);
}

/* =====================================================
   SKILLS SECTION COMPONENTS
   ===================================================== */
.skills-container {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--grid-gap-lg);
  margin-bottom: var(--spacing-2xl);
  align-items: center;
}

/* Smooth appearance of elements */
.project-card,
.skills-container,
.skills-details {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.3s ease forwards;
}

.skills-container {
  animation-delay: 0.1s;
}

.skills-details {
  animation-delay: 0.3s;
}

.skills-chart-container {
  position: relative;
  background: var(--bg-secondary);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(30px) scale(0.95);
  transition: all 0.8s var(--transition-bounce);
}

.skills-chart-container.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

#skills-chart {
  width: 100% !important;
  height: 458px !important;
}

/* Chart legend */
.chart-legend {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  opacity: 0;
  transform: translateX(-20px);
  transition: all 0.5s ease 0.3s;
}

.skills-chart-container.visible ~ .chart-legend {
  opacity: 1;
  transform: translateX(0);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  box-shadow: var(--shadow-md);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  border-left: 4px solid transparent;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateX(-10px);
  transition: var(--transition-normal);
}

.legend-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  transition: left 0.5s ease;
}

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

.legend-item:hover {
  background: var(--bg-primary);
  transform: translateX(5px);
  border-left-color: currentColor;
}

.legend-item.active {
  background: var(--bg-primary);
  border-left-color: currentColor;
}

.legend-item.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Delays for legend elements */
.legend-item:nth-child(1) {
  transition-delay: 0.4s;
}
.legend-item:nth-child(2) {
  transition-delay: 0.5s;
}
.legend-item:nth-child(3) {
  transition-delay: 0.6s;
}
.legend-item:nth-child(4) {
  transition-delay: 0.7s;
}
.legend-item:nth-child(5) {
  transition-delay: 0.8s;
}

.legend-color {
  width: 20px;
  height: 20px;
  border-radius: var(--border-radius-full);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.legend-info {
  flex: 1;
}

.legend-name {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.legend-count {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* Skills details grid */
.skills-details {
  display: grid;
  grid-template-columns: var(--grid-columns-2);
  gap: var(--grid-gap-lg);
  margin-top: var(--spacing-xl);
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease 0.5s;
}

.skills-chart-container.visible ~ .skills-details {
  opacity: 1;
  transform: translateY(0);
}

.skills-chart-container.chart-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.category-breakdown,
.skills-interactive {
  background: var(--bg-gradient);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
}

.category-breakdown h3,
.skills-interactive h3 {
  margin-bottom: var(--spacing-lg);
  font-weight: var(--font-weight-normal);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-lg);
}

.category-item {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  border-left: var(--spacing-xs) solid;
  opacity: 0;
  transform: translateX(-20px);
  transition: all 0.5s ease;
}

.category-item.visible {
  opacity: 1;
  transform: translateX(0);
}
.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.category-title {
  font-weight: var(--font-weight-semibold);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.category-stats {
  font-size: 0.8rem;
  opacity: 0.8;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.skill-tag {
  background: var(--bg-primary);
  padding: 0.3rem 0.8rem;
  border-radius: var(--border-radius-lg);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: all 0.3s ease;
  cursor: pointer;
  border: 1px solid transparent;
  box-shadow: var(--shadow-md);
}

.skill-tag:hover {
  background: var(--bg-secondary);
  transform: translateY(-2px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.skill-tag img {
  width: 24px;
  height: 24px;
}

.skills-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.cloud-tag {
  background: var(--gradient-card);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-xl);
  font-size: var(--font-size-sm);
  cursor: pointer;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition-normal);
  border: 2px solid transparent;
}

.cloud-tag.visible {
  opacity: 1;
  transform: scale(1);
}

.cloud-tag:hover {
  transform: scale(1.05);
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: var(--shadow-sm);
  z-index: 1;
}

/* Category colors for cloud tags */
.cloud-tag.frontend {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
}
.cloud-tag.backend {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}
.cloud-tag.database {
  background: linear-gradient(135deg, #06b6d4, #0891b2);
}
.cloud-tag.tools {
  background: linear-gradient(135deg, #10b981, #059669);
}

/* For a dark theme - darker shades */
.dark-theme .cloud-tag {
  opacity: 0.9;
}

.dark-theme .cloud-tag:hover {
  opacity: 1;
}

/* =====================================================
   EQUCATION SECTION
   ===================================================== */
.education-item {
  background-color: var(--bg-primary);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  margin: 0 auto;
}

.modal h3,
.education-item h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.education-period {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-style: italic;
}

.modal p,
.education-description p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

.curriculum {
  margin-top: var(--spacing-lg);
}

.curriculum h4 {
  font-size: var(--font-size-lg);
  color: var(--primary-color);
}

.modal ul,
.curriculum ul {
  list-style-type: none;
}

.modal li,
.curriculum li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

.modal li::before,
.curriculum li:before {
  content: '•';
  color: var(--primary-color);
  font-weight: bold;
  position: absolute;
  left: 0;
}

/* =====================================================
   PROJECTS SECTION
   ===================================================== */
.projects-filters {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--gap);
}

/* Filter buttons */
.filter-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  border-radius: 25px;
  cursor: pointer;
  transition: var(--transition-normal);
  font-weight: var(--font-weight-medium);
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--primary-color);
  color: white;
}

/* Project cards */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--grid-gap);
}

.project-card:nth-child(1) {
  animation-delay: 0.1s;
}
.project-card:nth-child(2) {
  animation-delay: 0.2s;
}
.project-card:nth-child(3) {
  animation-delay: 0.3s;
}
.project-card:nth-child(4) {
  animation-delay: 0.4s;
}
.project-card:nth-child(5) {
  animation-delay: 0.5s;
}

.project-image {
  height: 200px;
  overflow: hidden;
  position: relative;
}

.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-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

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

.project-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.tech-tag {
  background-color: var(--bg-secondary);
  color: var(--primary-color);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.project-links {
  display: flex;
  gap: var(--spacing-md);
}

.no-projects {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
  grid-column: 1 / -1;
}

/* =====================================================
   QA SECTION
   ===================================================== */
.qa-content {
  display: grid;
  grid-template-columns: var(--grid-columns-2);
  gap: var(--grid-gap-lg);
  align-items: center;
}

.qa-text h3 {
  font-size: var(--font-size-xl);
}

.qa-text p {
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
}

.qa-skills {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.qa-skill h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.qa-skill p {
  margin-bottom: 0;
}

.qa-image {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.qa-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* =====================================================
   CONTACT SECTION
   ===================================================== */
.contact-content {
  display: grid;
  grid-template-columns: var(--grid-columns-2);
  gap: var(--grid-gap-lg);
}

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

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  transition: var(--transition-normal);
}

.contact-item h3 {
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
  font-size: var(--font-size-base);
}

.contact-item p {
  margin: 0;
  color: var(--text-secondary);
}

.contact-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  font-size: var(--font-size-3xl);
  color: var(--primary-color);
  min-width: 30px;
}

.contact-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: var(--transition-normal);
  border-bottom: 1px solid transparent;
}

.contact-link:hover {
  color: var(--primary-hover);
  border-bottom-color: var(--primary-color);
}

/* =====================================================
   FOOTER & SOCIAL LINKS
   ===================================================== */
footer {
  background-color: var(--bg-primary);
  padding: var(--spacing-xl) 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.3s var(--transition-bounce);
  position: relative;
  overflow: hidden;
}

.social-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(99, 102, 241, 0.1),
    transparent
  );
  transition: left 0.5s ease;
}

.social-link:hover::before {
  left: 100%;
}

.social-link:hover {
  border-color: var(--primary-color);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.social-icon {
  width: 24px;
  height: 24px;
  fill: currentColor;
  transition: transform var(--transition-normal);
}

.social-link:hover .social-icon {
  transform: scale(1.1);
}

.copyright {
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
}

/* =====================================================
   FLOATING ACTION BUTTONS
   ===================================================== */
.back-to-top,
.privacy-fab {
  position: fixed;
  width: 50px;
  height: 50px;
  border-radius: var(--border-radius-full);
  background-color: var(--primary-color);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-normal);
  z-index: var(--z-fixed);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.back-to-top {
  right: var(--spacing-xl);
  bottom: var(--spacing-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.privacy-fab {
  left: var(--spacing-xl);
  bottom: var(--spacing-2xl);
}

.back-to-top:hover,
.privacy-fab:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

/* =====================================================
   MODALS & OVERLAYS
   ===================================================== */
.modal {
  display: none;
  position: fixed;
  z-index: var(--z-modal);
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: var(--backdrop-blur);
}

.modal-content {
  background-color: var(--bg-primary);
  margin: 5% auto;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  max-width: 700px;
  position: relative;
  font-size: var(--font-size-xs);
  /* max-height: 80vh; */
  overflow-y: auto;
}

.modal-content h2 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
}

.modal-close {
  color: var(--text-secondary);
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-lg);
  border: none;
  background: none;
  z-index: var(--z-tooltip);
}

.modal-close:hover {
  color: var(--text-primary);
}

.privacy-title {font-size: var(--font-size-xl);}

.cookies-controls {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.cookies-controls label {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
  cursor: pointer;
}

.cookies-controls input[type="checkbox"] {
  margin-right: 0.5rem;
}

/* Notification styles */
.notification-content {
  text-align: center;
  max-width: 400px;
  padding: var(--spacing-xl);
}

.notification-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
}

.notification-success .notification-icon {
  color: var(--success-color);
}

.notification-error .notification-icon {
  color: var(--error-color);
}

.notification-warning .notification-icon {
  color: var(--warning-color);
}

#notification-title {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

#notification-message {
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
  line-height: 1.5;
}

#notification-confirm {
  width: 100%;
  margin-top: var(--spacing-md);
}

/* =====================================================
   COOKIES BANNER
   ===================================================== */
.cookies-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-primary);
  padding: var(--spacing-lg);
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
  z-index: var(--z-modal);
  transform: translateY(100%);
  transition: transform var(--transition-normal);
}

.cookies-banner.active {
  transform: translateY(0);
}

.cookies-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.cookies-buttons {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
}

#cookies-learn-more {
  color: var(--primary-color);
  text-decoration: none;
  font-size: var(--font-size-xs);
}

#cookies-learn-more:hover {
  text-decoration: underline;
}

/* =====================================================
   ANIMATIONS & TRANSITIONS
   ===================================================== */
/* Fade in animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Scroll progress bar */
.progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
  z-index: var(--z-tooltip);
}

.progress-bar {
  height: 4px;
  background: var(--primary-color);
  width: 0%;
  transition: width var(--transition-fast);
}

/* Loading spinner */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--primary-color);
  border-radius: var(--border-radius-full);
  animation: spin 1s linear infinite;
  margin: var(--spacing-xl) auto;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

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

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

/* Smooth transitions for interactive elements */
.cloud-tag,
.category-item,
.skill-tag {
  transition: all var(--transition-normal);
}

/* Section element animations */
.skill-card,
.project-card,
.education-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

section.visible .skill-card,
section.visible .project-card,
section.visible .education-item {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays for cards */
section.visible .skill-card:nth-child(1) { transition-delay: 0.1s; }
section.visible .skill-card:nth-child(2) { transition-delay: 0.2s; }
section.visible .skill-card:nth-child(3) { transition-delay: 0.3s; }
section.visible .skill-card:nth-child(4) { transition-delay: 0.4s; }
section.visible .skill-card:nth-child(5) { transition-delay: 0.5s; }
section.visible .skill-card:nth-child(6) { transition-delay: 0.6s; }

section.visible .project-card:nth-child(1) { transition-delay: 0.1s; }
section.visible .project-card:nth-child(2) { transition-delay: 0.2s; }
section.visible .project-card:nth-child(3) { transition-delay: 0.3s; }

/* Chart legend visibility */
.skills-chart-container.chart-visible .legend-item {
  opacity: 1;
  transform: translateX(0);
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */
@media (max-width: 992px) {
  .menu-toggle {
    display: flex;
  }

  nav ul {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-primary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    z-index: var(--z-dropdown);
    gap: var(--spacing-xl);
  }

  nav ul.active {
    transform: translateX(0);
    margin-top: -50px;
  }

  .about-content,
  .contact-content,
  .qa-content,
  .skills-container,
  .skills-details {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: var(--font-size-3xl);
  }

  .hero-section {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 3rem 0;
    --spacing-3xl: 3rem;
    --spacing-4xl: 5rem;
  }

  h1 {
    font-size: var(--font-size-3xl);
  }
  .section-title {
    font-size: var(--font-size-2xl);
  }

  .logo svg {
    width: 140px;
    height: 35px;
  }

  .cookies-content {
    flex-direction: column;
  }

  .cookies-buttons {
    flex-direction: column;
    align-items: flex-start;
  }

  .modal-content {
    margin: 10% auto;
    width: 90%;
    padding: var(--spacing-lg);
  }

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

  #skills-chart {
    height: 300px !important;
  }

  .social-link {
    width: 44px;
    height: 44px;
  }

  .social-icon {
    width: 20px;
    height: 20px;
  }

  .back-to-top,
  .privacy-fab {
    width: 45px;
    height: 45px;
  }

  .privacy-fab {
    left: var(--spacing-md);
    bottom: var(--spacing-xl);
  }
}

@media (max-width: 576px) {
  .skills-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .project-links {
    flex-direction: column;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .logo svg {
    width: 120px;
    height: 30px;
  }

  .social-links {
    gap: var(--spacing-sm);
  }

  .social-link {
    width: 40px;
    height: 40px;
  }

  .back-to-top,
  .privacy-fab {
    width: 40px;
    height: 40px;
  }
}