/* ===================================
   Design System & CSS Variables
   =================================== */

:root {
    /* Color Palette - Dark Theme */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #1a1a1a;
    --color-bg-tertiary: #252525;
    --color-accent: #00d4ff;
    --color-accent-dark: #00a8cc;
    --color-accent-light: #33ddff;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b0b0;
    --color-text-muted: #808080;

    /* Glassmorphism */
    --glass-bg: rgba(26, 26, 26, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-blur: 20px;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-8: 3rem;
    --space-10: 4rem;
    --space-12: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Animation */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.7);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
}

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

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
    cursor: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    line-height: 1.2;
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    cursor: none;
}

button {
    font-family: inherit;
    cursor: none;
    border: none;
    background: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ===================================
   Custom Cursor
   =================================== */

.custom-cursor,
.cursor-follower {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 10000;
    mix-blend-mode: difference;
}

.custom-cursor {
    width: 10px;
    height: 10px;
    background-color: var(--color-accent);
    transform: translate(-50%, -50%);
}

.cursor-follower {
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-accent);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s, border-color 0.3s;
}

.cursor-follower.hover {
    width: 60px;
    height: 60px;
    border-color: var(--color-accent-light);
}

/* ===================================
   Utility Classes
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.section {
    padding: var(--space-12) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.section-label {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-3);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Animation Classes */
.reveal-up,
.reveal-left,
.reveal-right {
    opacity: 0;
    transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}

.reveal-up {
    transform: translateY(60px);
}

.reveal-left {
    transform: translateX(-60px);
}

.reveal-right {
    transform: translateX(60px);
}

.reveal-up.revealed,
.reveal-left.revealed,
.reveal-right.revealed {
    opacity: 1;
    transform: translate(0, 0);
}

/* Magnetic Button Effect */
.magnetic {
    position: relative;
    transition: transform var(--transition-base);
}

/* ===================================
   Navigation
   =================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--space-4) 0;
    transition: background-color var(--transition-base), backdrop-filter var(--transition-base);
}

.nav.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-accent);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: var(--transition-base);
}

.nav-menu {
    display: flex;
    gap: var(--space-6);
    list-style: none;
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}

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

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

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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--space-6);
    max-width: 900px;
}

.hero-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    margin-bottom: var(--space-5);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-arrow {
    width: 20px;
    height: 30px;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-full);
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background-color: var(--color-accent);
    border-radius: var(--radius-full);
    animation: scroll-bounce 1.5s infinite;
}

@keyframes scroll-bounce {

    0%,
    100% {
        transform: translate(-50%, 0);
        opacity: 1;
    }

    50% {
        transform: translate(-50%, 10px);
        opacity: 0.5;
    }
}

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-bg-primary);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.5);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: var(--color-accent);
    color: var(--color-bg-primary);
}

/* ===================================
   About Section
   =================================== */

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-8);
    align-items: start;
}

.about-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.info-card {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.info-label {
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
}

.info-value {
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    font-weight: 500;
}

.about-bio h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-4);
    color: var(--color-accent);
}

.about-bio p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.stat-item {
    padding: var(--space-5);
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-accent);
    font-family: var(--font-display);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===================================
   Experience Timeline
   =================================== */

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

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-accent) 0%, var(--color-bg-tertiary) 100%);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-10);
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background-color: var(--color-accent);
    border: 4px solid var(--color-bg-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--glass-border);
    z-index: 2;
}

.timeline-content {
    flex: 1;
    padding: var(--space-6);
    max-width: 45%;
}

.timeline-date {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-3);
}

.timeline-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-2);
}

.timeline-company {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-3);
}

.timeline-description {
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.career-progression {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.progression-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    background: rgba(0, 212, 255, 0.05);
    border-left: 2px solid var(--color-accent);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.progression-item:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateX(5px);
}

.progression-role {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

.progression-period {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
}

.skill-card {
    padding: var(--space-6);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

.skill-icon {
    width: 60px;
    height: 60px;
    color: var(--color-accent);
}

.skill-icon svg {
    width: 100%;
    height: 100%;
}

.skill-name {
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
}

.skill-gauge {
    position: relative;
    width: 120px;
    height: 120px;
}

.gauge-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.gauge-bg,
.gauge-fill {
    fill: none;
    stroke-width: 8;
}

.gauge-bg {
    stroke: var(--color-bg-tertiary);
}

.gauge-fill {
    stroke: var(--color-accent);
    stroke-linecap: round;
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 1.5s var(--ease-out-expo);
}

.gauge-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-accent);
}

/* ===================================
   Contact Section
   =================================== */

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-8);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.contact-item {
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-3);
}

a.contact-item {
    text-decoration: none;
    color: inherit;
}

.contact-icon {
    width: 50px;
    height: 50px;
    color: var(--color-accent);
}

.contact-icon svg {
    width: 100%;
    height: 100%;
}

.contact-item h3 {
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
}

.contact-item p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.social-links {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
}

.social-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--color-accent);
    transition: all var(--transition-base);
}

.social-link:hover {
    background-color: var(--color-accent);
    color: var(--color-bg-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.social-link svg {
    width: 24px;
    height: 24px;
}

.contact-form {
    padding: var(--space-6);
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.form-input {
    width: 100%;
    padding: var(--space-4);
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

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

.form-input::placeholder {
    color: var(--color-text-muted);
}

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

.form-error {
    display: block;
    font-size: var(--font-size-xs);
    color: #ff4444;
    margin-top: var(--space-2);
}

.form-success {
    padding: var(--space-4);
    background-color: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-md);
    color: var(--color-accent);
    text-align: center;
    margin-top: var(--space-4);
}

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

.footer {
    padding: var(--space-6);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    border-top: 1px solid var(--glass-border);
}

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

@media (max-width: 1024px) {

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

    .timeline-content {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        flex-direction: column;
        background: var(--glass-bg);
        backdrop-filter: blur(var(--glass-blur));
        padding: var(--space-4);
        gap: var(--space-3);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

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

    .hero-buttons {
        flex-direction: column;
    }

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

    .timeline-item {
        flex-direction: column !important;
        text-align: center;
    }

    .timeline-line {
        left: var(--space-4);
    }

    .timeline-dot {
        left: var(--space-4);
    }

    .timeline-content {
        max-width: 100%;
        margin-left: var(--space-8);
    }

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

@media (max-width: 480px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-5xl: 2.5rem;
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

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