/* ===== CSS CUSTOM PROPERTIES (THEME SYSTEM) ===== */

:root {
    /* Dark Theme (Default) */
    --bg-color: #0a0a0a;
    --surface-color: #1a1a1a;
    --surface-hover: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --primary-color: #00d4ff;
    --primary-hover: #00b8e6;
    --accent-color: #ff6b6b;
    --accent-hover: #ff5252;
    --border-color: #333333;
    --border-hover: #555555;
    --shadow: rgba(0, 0, 0, 0.5);
    --shadow-lg: rgba(0, 0, 0, 0.8);
    --gradient-primary: linear-gradient(135deg, #00d4ff, #0099cc);
    --gradient-accent: linear-gradient(135deg, #ff6b6b, #ff5252);
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    /* Z-index */
    --z-dropdown: 1000;
    --z-header: 100;
    --z-cursor: 9999;
}


/* Light Theme */

[data-theme="light"] {
    --bg-color: #ffffff;
    --surface-color: #f8f9fa;
    --surface-hover: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #6c757d;
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --accent-color: #dc3545;
    --accent-hover: #c82333;
    --border-color: #dee2e6;
    --border-hover: #adb5bd;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.2);
    --gradient-primary: linear-gradient(135deg, #007bff, #0056b3);
    --gradient-accent: linear-gradient(135deg, #dc3545, #c82333);
}


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

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

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

body {
    font-family: var(--font-primary);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}


/* ===== CUSTOM CURSOR - DISABLED ===== */


/* 
.cursor {
  position: fixed;
  width: 20px;
  height: 20px;
  background: var(--primary-color);
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-cursor);
  mix-blend-mode: difference;
  transition: transform var(--transition-fast);
  opacity: 0;
}

.cursor.hover {
  transform: scale(1.5);
  background: var(--accent-color);
}

.cursor.click {
  transform: scale(0.8);
}

.cursor-trail {
  position: fixed;
  width: 4px;
  height: 4px;
  background: var(--primary-color);
  border-radius: 50%;
  pointer-events: none;
  z-index: calc(var(--z-cursor) - 1);
  opacity: 0;
  mix-blend-mode: difference;
}
*/


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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-sm);
}

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

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

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

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


/* ===== LAYOUT ===== */

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

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    position: relative;
    display: inline-block;
    margin-bottom: var(--space-sm);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}


/* ===== HEADER & NAVIGATION ===== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-header);
    transition: all var(--transition-normal);
}

[data-theme="light"] .header {
    background: rgba(255, 255, 255, 0.8);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    max-width: 1200px;
    margin: 0 auto;
}

.logo-link {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-link {
    position: relative;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    padding: var(--space-xs) 0;
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}


/* ===== LANGUAGE SELECTOR ===== */

.language-selector {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-xs) var(--space-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
}

.language-btn:hover {
    border-color: var(--border-hover);
    background: var(--surface-hover);
}

.dropdown-arrow {
    transition: transform var(--transition-fast);
}

.language-btn[aria-expanded="true"] .dropdown-arrow {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px var(--shadow);
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
}

.language-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-sm);
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    text-align: left;
}

.language-option:hover {
    background: var(--surface-hover);
}

.language-option.active {
    background: var(--primary-color);
    color: white;
}


/* ===== THEME TOGGLE ===== */

.theme-toggle {
    position: relative;
    width: 50px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.theme-toggle-track {
    width: 100%;
    height: 100%;
    background: var(--border-color);
    border-radius: 12px;
    position: relative;
    transition: background-color var(--transition-normal);
}

.theme-toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: var(--text-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-normal);
}

[data-theme="light"] .theme-toggle-thumb {
    transform: translateX(26px);
}

[data-theme="light"] .theme-toggle-track {
    background: var(--primary-color);
}

.sun-icon,
.moon-icon {
    position: absolute;
    transition: opacity var(--transition-normal);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
}

[data-theme="light"] .sun-icon {
    opacity: 1;
}

[data-theme="light"] .moon-icon {
    opacity: 0;
}


/* ===== MOBILE MENU ===== */

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
    border-radius: 1px;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}


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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
}

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

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.hero-text {
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    margin-bottom: var(--space-md);
}

.greeting {
    display: block;
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.name-animated {
    display: block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    animation: glow 2s ease-in-out infinite alternate;
}

.age {
    display: block;
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

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

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

.hero-description {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--space-xl);
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    animation: fadeInRight 1s ease-out 0.3s both;
}

.hero-image {
    position: relative;
    width: 300px;
    height: 300px;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.3);
    animation: float 3s ease-in-out infinite;
}

.avatar-icon {
    animation: pulse 2s ease-in-out infinite;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.floating-element {
    position: absolute;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    animation: floatAround 4s ease-in-out infinite;
    animation-delay: var(--delay);
}

.floating-element:nth-child(1) {
    top: 20%;
    right: -20px;
}

.floating-element:nth-child(2) {
    top: 60%;
    left: -30px;
}

.floating-element:nth-child(3) {
    bottom: 20%;
    right: -10px;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    animation: bounce 2s infinite;
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

.scroll-text {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}


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

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-normal);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-icon {
    transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateX(2px);
}


/* ===== EXPERIENCE SECTION ===== */

.experience {
    padding: var(--space-2xl) 0;
    background: var(--surface-color);
}

.experience-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-xl);
    padding-left: 80px;
}

.timeline-marker {
    position: absolute;
    left: 21px;
    top: 0;
}

.timeline-dot {
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border: 4px solid var(--bg-color);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--primary-color);
}

.timeline-content {
    background: var(--bg-color);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px var(--shadow);
    transition: transform var(--transition-normal);
}

.timeline-content:hover {
    transform: translateY(-5px);
}

.timeline-period {
    font-size: 0.875rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.timeline-title {
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.timeline-role {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.timeline-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

.skill-tag {
     background: var(--surface-color);
     color: var(--text-primary);
     padding: var(--space-xs) var(--space-sm);
     border-radius: var(--radius-sm);
     font-size: 0.875rem;
     font-weight: 500;
     border: 1px solid var(--border-color);
     display: inline-flex;
     align-items: center;
     gap: var(--space-xs);
     transition: all var(--transition-fast);
}

.skill-tag:hover {
     background: var(--surface-hover);
     border-color: var(--primary-color);
     transform: translateY(-2px);
     box-shadow: 0 4px 12px rgba(0, 212, 255, 0.2);
}

.skill-icon {
     flex-shrink: 0;
     color: var(--primary-color);
     transition: transform var(--transition-fast);
}

.skill-tag:hover .skill-icon {
     transform: scale(1.1);
     color: var(--primary-hover);
}

.timeline-description {
    color: var(--text-secondary);
    line-height: 1.6;
}


/* ===== CERTIFICATES SECTION ===== */

.certificates {
    padding: var(--space-2xl) 0;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.certificate-card {
    background: var(--surface-color);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.certificate-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.certificate-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--shadow);
}

.certificate-card.featured-certificate {
    border: 2px solid var(--primary-color);
    background: linear-gradient(135deg, var(--surface-color) 0%, rgba(0, 212, 255, 0.05) 100%);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.2);
}

.certificate-card.featured-certificate::before {
    height: 6px;
    background: var(--gradient-primary);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.certificate-card.featured-certificate:hover {
    transform: translateY(-15px);
    box-shadow: 0 25px 50px rgba(0, 212, 255, 0.3);
}

.certificate-card.featured-certificate .certificate-icon {
    width: 90px;
    height: 90px;
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
}

.certificate-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    color: white;
}

.certificate-title {
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

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

.certificate-date {
    font-size: 0.875rem;
    color: var(--primary-color);
    font-weight: 600;
}


/* ===== TECHNOLOGIES & SKILLS SECTION ===== */

.skills {
    padding: var(--space-2xl) 0;
    background: var(--surface-color);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.skill-group {
    background: var(--bg-color);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.skill-group:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px var(--shadow);
}

.skill-group-title {
    color: var(--primary-color);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-xs);
    border-bottom: 2px solid var(--border-color);
}

.skills .skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.skills .skill-tag {
    background: var(--surface-color);
    color: var(--text-primary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    display: inline-block;
    transition: all var(--transition-fast);
}

.skills .skill-tag:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}


/* ===== MENTOR SECTION ===== */

.mentor {
    padding: var(--space-2xl) 0;
    background: var(--bg-color);
}

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

.mentor-info {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    background: var(--surface-color);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px var(--shadow);
    transition: transform var(--transition-normal);
}

.mentor-info:hover {
    transform: translateY(-5px);
}

.mentor-avatar {
    flex-shrink: 0;
}

.avatar-placeholder {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.mentor-details {
    flex: 1;
}

.mentor-name {
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    font-size: 1.5rem;
    font-weight: 600;
}

.mentor-role {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--space-sm);
    font-size: 1.125rem;
}

.mentor-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 1rem;
}


/* ===== LANGUAGES SECTION ===== */

.languages {
    padding: var(--space-2xl) 0;
    background: var(--surface-color);
}

.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.language-card {
    background: var(--bg-color);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.language-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.language-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px var(--shadow-lg);
}

.language-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    color: white;
}

.language-name {
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    font-size: 1.25rem;
    font-weight: 600;
}

.language-level {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-size: 0.9rem;
}

.language-progress {
    width: 100%;
    height: 8px;
    background: var(--surface-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 1s ease;
}


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

.projects {
    padding: var(--space-2xl) 0;
    background: var(--bg-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-lg);
}

.project-card {
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    box-shadow: 0 10px 30px var(--shadow);
    overflow: hidden;
    position: relative;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px var(--shadow-lg);
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
}

.project-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.project-status {
    display: flex;
    align-items: center;
}

.status-badge {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-badge.active {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

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

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

.tech-tag {
    background: var(--surface-color);
    color: var(--text-primary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.project-title {
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    font-size: 1.25rem;
    font-weight: 600;
}

.project-title-link {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.project-title-link:hover {
    color: var(--primary-color);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.6;
    font-size: 0.9rem;
}

.project-mini-desc {
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    font-size: 0.95rem;
    line-height: 1.5;
    opacity: 0.9;
}

.project-links {
    display: flex;
    justify-content: center;
}

.project-links-double {
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.project-card-brand .project-icon {
    font-size: 1.75rem;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-thumb-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: calc(var(--radius-md) - 0.15rem);
    display: block;
}

.project-icon-emoji {
    font-size: 1.75rem;
    line-height: 1;
    color: white;
}


/* ===== PROJECTS TECH BADGES ===== */

.projects-tech-section {
    padding: var(--space-xl);
    border: 1px solid var(--border-color);
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    margin-top: var(--space-2xl);
    box-shadow: 0 10px 30px var(--shadow);
}

.projects-tech-title {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    letter-spacing: 0.2px;
}

.projects-tech-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
}

.projects-tech-badges .tech-tag {
    font-size: 0.8rem;
}

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

.contact {
    padding: var(--space-2xl) 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

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

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

.contact-item:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 30px var(--shadow);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.contact-details h3 {
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    font-size: 1.125rem;
}

.contact-details a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.contact-hint {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: var(--space-xs) 0 0;
}

.contact-item-telegram {
    border-color: rgba(0, 212, 255, 0.3);
    background: linear-gradient(135deg, var(--surface-color) 0%, rgba(0, 212, 255, 0.05) 100%);
}


/* ===== FORM STYLES ===== */

.form {
    background: var(--surface-color);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-sm);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-primary);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}


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

.footer {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: var(--space-xl) 0;
}

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

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

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-links a {
    width: 40px;
    height: 40px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}


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

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

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

@keyframes glow {
    from {
        filter: drop-shadow(0 0 5px rgba(0, 212, 255, 0.5));
    }
    to {
        filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.8));
    }
}

@keyframes blink {
    0%,
    50% {
        opacity: 1;
    }
    51%,
    100% {
        opacity: 0;
    }
}

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

@keyframes floatAround {
    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
    }
    25% {
        transform: translateY(-10px) rotate(5deg);
    }
    50% {
        transform: translateY(-5px) rotate(-3deg);
    }
    75% {
        transform: translateY(-15px) rotate(3deg);
    }
}

@keyframes pulse {
    0%,
    100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes bounce {
    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateX(-50%) translateY(12px);
        opacity: 0;
    }
}


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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface-color);
        border-top: 1px solid var(--border-color);
        padding: var(--space-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .nav-list {
        flex-direction: column;
        gap: var(--space-md);
    }
    .mobile-menu-toggle {
        display: flex;
    }
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-xl);
    }
    .hero-buttons {
        justify-content: center;
    }
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    .mentor-info {
        flex-direction: column;
        text-align: center;
        gap: var(--space-lg);
    }
    .footer-content {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
    .projects-grid {
        grid-template-columns: 1fr;
    }
    .certificates-grid {
        grid-template-columns: 1fr;
    }
    .skills-grid {
        grid-template-columns: 1fr;
    }
    .languages-grid {
        grid-template-columns: 1fr;
    }
    .experience-timeline::before {
        left: 15px;
    }
    .timeline-item {
        padding-left: 50px;
    }
    .timeline-marker {
        left: 6px;
    }
    .timeline-dot {
        width: 12px;
        height: 12px;
        border-width: 2px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    .btn {
        width: 100%;
        justify-content: center;
    }
    .nav-container {
        padding: var(--space-sm);
    }
    .section-header {
        margin-bottom: var(--space-xl);
    }
    .hero {
        padding-top: 80px;
    }
}


/* ===== ACCESSIBILITY ===== */

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


/* Focus styles for keyboard navigation */

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}


/* High contrast mode support */

@media (prefers-contrast: high) {
     :root {
        --border-color: #ffffff;
        --text-secondary: #ffffff;
        --shadow: rgba(255, 255, 255, 0.5);
    }
}


/* Print styles */

@media print {
    .header,
    .cursor,
    .cursor-trail,
    .scroll-indicator {
        display: none;
    }
    body {
        background: white;
        color: black;
    }
    .hero,
    .experience,
    .certificates,
    .skills,
    .projects,
    .contact {
        break-inside: avoid;
    }
}


/* ===== CYBERSECURITY SECTION ===== */

.cyber {
    padding: var(--space-2xl) 0;
    background: var(--surface-color);
}

.cyber-skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.cyber-skill-card {
    background: var(--bg-color);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.cyber-skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.cyber-skill-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--shadow);
    border-color: var(--primary-color);
}

.cyber-skill-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    color: white;
}

.cyber-skill-name {
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    font-size: 1.15rem;
}

.cyber-skill-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Sub-block titles inside cyber section */
.cyber-block-title {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    font-size: 1.5rem;
    font-weight: 600;
}

/* CTF Platforms */
.cyber-platforms-block {
    margin-bottom: var(--space-2xl);
}

.cyber-platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-md);
}

.cyber-platform-card {
    background: var(--bg-color);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-normal);
    display: block;
}

.cyber-platform-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px var(--shadow);
    color: var(--text-primary);
}

.cyber-platform-name {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--space-xs);
}

.cyber-platform-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Tools */
.cyber-tools-block {
    text-align: center;
}

.cyber-tools-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
}

.cyber-tools-block .skill-tag {
    background: var(--bg-color);
    color: var(--text-primary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.cyber-tools-block .skill-tag:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}