/* ============================
   CSS Variables & Design System
   ============================ */
:root {
    /* Colors */
    --primary: #6C63FF;
    --primary-light: #8B83FF;
    --primary-dark: #4A42D4;
    --secondary: #00D2FF;
    --accent: #FF6B9D;
    --accent-warm: #FFA07A;

    /* Backgrounds */
    --bg-dark: #0a0a1a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-glass-hover: rgba(255, 255, 255, 0.08);

    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);

    /* Borders */
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(108, 99, 255, 0.3);

    /* Spacing */
    --section-padding: 120px 0;
    --container-max: 1100px;

    /* Animation */
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Shadows */
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(108, 99, 255, 0.15);
    --shadow-primary: 0 4px 20px rgba(108, 99, 255, 0.4);
    --bg-mobile-nav: rgba(10, 10, 26, 0.95);
}

/* ============================
   Reset & Base
   ============================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Noto Sans Thai', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

::selection {
    background: var(--primary);
    color: white;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-dark);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ============================
   Particle Canvas
   ============================ */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ============================
   Container
   ============================ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================
   Glass Card
   ============================ */
.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    transition: var(--transition-smooth);
}

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

/* ============================
   Navigation
   ============================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    padding: 10px 32px;
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
}

.nav-logo {
    position: relative;
    z-index: 1001;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================
   Hero Section
   ============================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 100px 24px 60px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(108, 99, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(0, 210, 255, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(255, 107, 157, 0.04) 0%, transparent 50%);
    animation: heroGlow 15s ease-in-out infinite alternate;
    z-index: 0;
}

@keyframes heroGlow {
    0% {
        transform: translate(0, 0) rotate(0deg);
    }

    50% {
        transform: translate(-2%, -2%) rotate(1deg);
    }

    100% {
        transform: translate(2%, 2%) rotate(-1deg);
    }
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 80px;
    position: relative;
    z-index: 1;
    max-width: var(--container-max);
    width: 100%;
}

.hero-avatar {
    position: relative;
    flex-shrink: 0;
}

.avatar-ring {
    position: absolute;
    top: -15px;
    left: -15px;
    right: -15px;
    bottom: -15px;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: var(--primary);
    border-right-color: var(--secondary);
    animation: ringRotate 8s linear infinite;
}

.ring-2 {
    top: -25px;
    left: -25px;
    right: -25px;
    bottom: -25px;
    border-top-color: var(--accent);
    border-left-color: var(--primary-light);
    animation-duration: 12s;
    animation-direction: reverse;
}

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

.avatar-img {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border-glass);
    box-shadow: 0 0 60px rgba(108, 99, 255, 0.2);
    position: relative;
    z-index: 1;
}

.avatar-status {
    position: absolute;
    bottom: 15px;
    right: 15px;
    width: 20px;
    height: 20px;
    background: #00e676;
    border-radius: 50%;
    border: 3px solid var(--bg-dark);
    z-index: 2;
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.4);
    }

    50% {
        box-shadow: 0 0 0 8px rgba(0, 230, 118, 0);
    }
}

.hero-text {
    flex: 1;
}

.hero-greeting {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.greeting-icon {
    font-size: 1.5rem;
    animation: wave 2.5s infinite;
    display: inline-block;
}

@keyframes wave {

    0%,
    60%,
    100% {
        transform: rotate(0deg);
    }

    10%,
    30% {
        transform: rotate(14deg);
    }

    20% {
        transform: rotate(-8deg);
    }

    40% {
        transform: rotate(-4deg);
    }

    50% {
        transform: rotate(10deg);
    }
}

.typing-text {
    border-right: 2px solid var(--primary);
    padding-right: 2px;
    animation: blink 0.8s infinite;
}

@keyframes blink {

    0%,
    100% {
        border-color: var(--primary);
    }

    50% {
        border-color: transparent;
    }
}

.hero-name {
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
}

.name-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: nameReveal 0.8s forwards;
    animation-delay: calc(0.3s + var(--delay, 0) * 0.001s);
}

.name-line.surname {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation-delay: 0.6s;
}

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

.hero-title {
    margin-bottom: 12px;
}

.title-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 1rem;
    color: var(--text-secondary);
    backdrop-filter: blur(10px);
}

.title-badge i {
    color: var(--primary);
}

.hero-location {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.hero-location i {
    color: var(--accent);
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition-smooth);
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(108, 99, 255, 0.5);
}

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

.btn-outline:hover {
    background: var(--bg-glass);
    border-color: var(--border-glow);
    transform: translateY(-3px);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 1;
    opacity: 0.6;
    transition: var(--transition-smooth);
}

.scroll-indicator:hover {
    opacity: 1;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 14px;
    position: relative;
}

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

@keyframes scrollWheel {

    0%,
    100% {
        opacity: 1;
        top: 8px;
    }

    100% {
        opacity: 0;
        top: 24px;
    }
}

.scroll-indicator p {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* ============================
   Sections
   ============================ */
.section {
    padding: var(--section-padding);
    position: relative;
    z-index: 1;
}

.section-alt {
    background: rgba(255, 255, 255, 0.01);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-number {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 3px;
    display: block;
    margin-bottom: 8px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 2px;
    margin: 0 auto;
}

/* ============================
   About Section
   ============================ */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.about-card {
    padding: 36px 28px;
    text-align: center;
}

.about-icon {
    width: 70px;
    height: 70px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.15), rgba(0, 210, 255, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.5rem;
    color: var(--primary);
    transition: var(--transition-smooth);
}

.about-card:hover .about-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.25), rgba(0, 210, 255, 0.2));
}

.about-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.about-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.8;
}

/* ============================
   Timeline (Education)
   ============================ */
.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--secondary), transparent);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    display: flex;
    align-items: flex-start;
    margin-bottom: 48px;
}

.timeline-item:nth-child(odd) {
    justify-content: flex-start;
    padding-right: calc(50% + 40px);
}

.timeline-item:nth-child(even) {
    justify-content: flex-end;
    padding-left: calc(50% + 40px);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    z-index: 2;
    box-shadow: 0 0 30px rgba(108, 99, 255, 0.3);
}

.timeline-content {
    padding: 28px;
    width: 100%;
}

.timeline-badge {
    display: inline-block;
    padding: 4px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    margin-bottom: 12px;
}

.badge-secondary {
    background: linear-gradient(135deg, var(--secondary), #0099cc);
}

.timeline-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.timeline-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.timeline-subtitle i,
.timeline-location i {
    color: var(--primary);
    font-size: 0.8rem;
}

.timeline-location {
    color: var(--text-muted);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.timeline-location i {
    color: var(--accent);
}

/* ============================
   Experience Section
   ============================ */
.experience-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.exp-card {
    padding: 36px;
    position: relative;
    overflow: hidden;
}

.exp-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

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

.exp-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.exp-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.2), rgba(108, 99, 255, 0.05));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--primary);
}

.exp-icon.icon-secondary {
    background: linear-gradient(135deg, rgba(0, 210, 255, 0.2), rgba(0, 210, 255, 0.05));
    color: var(--secondary);
}

.exp-badge {
    padding: 5px 14px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(108, 99, 255, 0.15);
    color: var(--primary-light);
    border: 1px solid rgba(108, 99, 255, 0.2);
}

.exp-badge.badge-past {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    border-color: var(--border-glass);
}

.exp-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
}

.exp-company {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.exp-company i {
    color: var(--primary);
    font-size: 0.85rem;
}

.exp-location {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.exp-location i {
    color: var(--accent);
    font-size: 0.8rem;
}

.exp-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    padding: 5px 14px;
    border-radius: 8px;
    font-size: 0.78rem;
    font-weight: 500;
    background: rgba(108, 99, 255, 0.08);
    color: var(--text-secondary);
    border: 1px solid rgba(108, 99, 255, 0.1);
    transition: var(--transition-smooth);
}

.tag:hover {
    background: rgba(108, 99, 255, 0.15);
    color: var(--primary-light);
}

/* ============================
   Portfolio Section
   ============================ */
.portfolio-showcase {
    max-width: 900px;
    margin: 0 auto;
}

.portfolio-card {
    padding: 0;
    overflow: hidden;
}

.portfolio-card-inner {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 400px;
}

.portfolio-visual {
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.12), rgba(0, 210, 255, 0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.portfolio-visual::before {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(108, 99, 255, 0.15), transparent 70%);
    animation: portfolioPulse 4s ease-in-out infinite;
}

@keyframes portfolioPulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.5;
    }

    50% {
        transform: scale(1.3);
        opacity: 1;
    }
}

.portfolio-icon-large {
    width: 100px;
    height: 100px;
    border-radius: 28px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    position: relative;
    z-index: 2;
    box-shadow: 0 10px 40px rgba(108, 99, 255, 0.3);
}

.portfolio-floating-icons {
    position: absolute;
    width: 100%;
    height: 100%;
}

.float-icon {
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
    font-size: 0.9rem;
    animation: floatIcon 6s ease-in-out infinite;
    animation-delay: calc(var(--i) * 1.5s);
}

.float-icon:nth-child(1) {
    top: 15%;
    left: 10%;
}

.float-icon:nth-child(2) {
    top: 10%;
    right: 15%;
}

.float-icon:nth-child(3) {
    bottom: 15%;
    left: 15%;
}

.float-icon:nth-child(4) {
    bottom: 10%;
    right: 10%;
}

@keyframes floatIcon {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-10px) rotate(5deg);
    }
}

.portfolio-info {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.portfolio-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.portfolio-label i {
    color: #ffc107;
}

.portfolio-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 14px;
    line-height: 1.4;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.portfolio-desc {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

.portfolio-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 24px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.feature-item i {
    color: #00e676;
    font-size: 0.8rem;
    flex-shrink: 0;
}

.portfolio-tech {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tech-tag {
    padding: 5px 14px;
    border-radius: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.12), rgba(0, 210, 255, 0.08));
    color: var(--primary-light);
    border: 1px solid rgba(108, 99, 255, 0.15);
}

/* ============================
   Skills Section
   ============================ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 700px;
    margin: 0 auto;
}

.skill-card {
    padding: 40px 32px;
    text-align: center;
    position: relative;
}

.skill-icon-wrapper {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 24px;
}

.skill-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.05);
    stroke-width: 4;
}

.progress-fill {
    fill: none;
    stroke: var(--primary);
    stroke-width: 4;
    stroke-linecap: round;
    stroke-dasharray: 339.292;
    stroke-dashoffset: 339.292;
    transition: stroke-dashoffset 2s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-fill.fill-ai {
    stroke: var(--secondary);
}

.skill-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.2), rgba(108, 99, 255, 0.05));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
    z-index: 1;
    transition: var(--transition-smooth);
}

.skill-icon.icon-ai {
    background: linear-gradient(135deg, rgba(0, 210, 255, 0.2), rgba(0, 210, 255, 0.05));
    color: var(--secondary);
}

.skill-card:hover .skill-icon {
    transform: translate(-50%, -50%) scale(1.1);
}

.skill-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.skill-desc {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 20px;
}

.skill-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.skill-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 3px;
    width: 0;
    transition: width 2s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-bar-fill.bar-ai {
    background: linear-gradient(90deg, var(--secondary), #00e5ff);
}

.skill-percent {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-light);
}

/* ============================
   Contact Section
   ============================ */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 32px;
}

.contact-info {
    padding: 40px;
}

.contact-info h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-info h3 i {
    color: var(--primary);
}

.contact-info>p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 32px;
    line-height: 1.8;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.15), rgba(108, 99, 255, 0.05));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.contact-item p {
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* Contact Form */
.contact-form {
    padding: 40px;
}

.form-group {
    position: relative;
    margin-bottom: 28px;
}

.form-input {
    width: 100%;
    padding: 16px 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border-glass);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: var(--transition-smooth);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-label {
    position: absolute;
    left: 0;
    top: 16px;
    color: var(--text-muted);
    font-size: 0.95rem;
    pointer-events: none;
    transition: var(--transition-smooth);
}

.form-input:focus~.form-label,
.form-input:not(:placeholder-shown)~.form-label {
    top: -8px;
    font-size: 0.75rem;
    color: var(--primary);
}

.form-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.4s ease;
}

.form-input:focus~.form-line {
    width: 100%;
}

.btn-submit {
    width: 100%;
    justify-content: center;
    padding: 16px;
    border-radius: 14px;
    position: relative;
    overflow: hidden;
}

.btn-loader,
.btn-success {
    display: none;
}

.btn-submit.loading .btn-text,
.btn-submit.loading .btn-icon {
    display: none;
}

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

.btn-submit.success .btn-text,
.btn-submit.success .btn-icon {
    display: none;
}

.btn-submit.success .btn-success {
    display: inline;
}

.btn-submit.success {
    background: linear-gradient(135deg, #00e676, #26a69a);
}

/* ============================
   Footer
   ============================ */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-glass);
    position: relative;
    z-index: 1;
}

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

.footer-logo {
    font-size: 1.3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ============================
   Back to Top
   ============================ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-primary);
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(108, 99, 255, 0.5);
}

/* ============================
   Reveal Animations
   ============================ */
.reveal-up,
.reveal-left,
.reveal-right {
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    transition-delay: var(--delay, 0s);
}

.reveal-up {
    transform: translateY(50px);
}

.reveal-left {
    transform: translateX(-50px);
}

.reveal-right {
    transform: translateX(50px);
}

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

/* ============================
   Responsive Design
   ============================ */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .hero-location {
        justify-content: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .timeline::before {
        left: 24px;
    }

    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        padding-left: 80px;
        padding-right: 0;
        justify-content: flex-start;
    }

    .timeline-dot {
        left: 24px;
        transform: translateX(-50%);
    }

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

    .skills-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-mobile-nav);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 100px 32px 32px;
        gap: 4px;
        transition: right 0.4s ease;
        border-left: 1px solid var(--border-glass);
    }

    .nav-links.open {
        right: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-link {
        font-size: 1rem;
        padding: 14px 20px;
    }

    .avatar-img {
        width: 160px;
        height: 160px;
    }

    .hero-name {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .footer-content {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 16px 40px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }

    .exp-card,
    .skill-card,
    .contact-info,
    .contact-form {
        padding: 28px 20px;
    }

    .portfolio-card-inner {
        grid-template-columns: 1fr;
    }

    .portfolio-visual {
        min-height: 200px;
    }

    .portfolio-info {
        padding: 24px 20px;
    }

    .portfolio-features {
        grid-template-columns: 1fr;
    }
}

/* ============================
   Theme Toggle Button
   ============================ */
.theme-toggle {
    position: fixed;
    bottom: 100px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    z-index: 999;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-card);
}

.theme-toggle:hover {
    transform: translateY(-4px) rotate(15deg);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.theme-toggle .fa-sun {
    display: none;
}

.theme-toggle .fa-moon {
    display: inline;
}

[data-theme="light"] .theme-toggle .fa-sun {
    display: inline;
}

[data-theme="light"] .theme-toggle .fa-moon {
    display: none;
}

/* ============================
   Light Mode
   ============================ */
[data-theme="light"] {
    --primary: #5B52E0;
    --primary-light: #7B73FF;
    --primary-dark: #3D35B0;
    --secondary: #0099CC;
    --accent: #E0527A;

    --bg-dark: #f5f7fb;
    --bg-card: rgba(255, 255, 255, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.6);
    --bg-glass-hover: rgba(255, 255, 255, 0.8);
    --bg-mobile-nav: rgba(245, 247, 251, 0.95);

    --text-primary: #1a1a2e;
    --text-secondary: rgba(26, 26, 46, 0.65);
    --text-muted: rgba(26, 26, 46, 0.4);

    --border-glass: rgba(26, 26, 46, 0.08);
    --border-glow: rgba(91, 82, 224, 0.25);

    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.06);
    --shadow-glow: 0 0 40px rgba(91, 82, 224, 0.08);
    --shadow-primary: 0 4px 20px rgba(91, 82, 224, 0.25);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(245, 247, 251, 0.9);
}

[data-theme="light"] .section-alt {
    background: rgba(91, 82, 224, 0.02);
}

[data-theme="light"] .glass-card {
    background: rgba(255, 255, 255, 0.65);
    border-color: rgba(26, 26, 46, 0.08);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .glass-card:hover {
    background: rgba(255, 255, 255, 0.85);
    box-shadow: 0 8px 36px rgba(91, 82, 224, 0.1);
}

[data-theme="light"] .hero::before {
    background: radial-gradient(circle at 30% 40%, rgba(91, 82, 224, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(0, 153, 204, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(224, 82, 122, 0.03) 0%, transparent 50%);
}

[data-theme="light"] .avatar-img {
    box-shadow: 0 0 60px rgba(91, 82, 224, 0.12);
}

[data-theme="light"] .name-line.surname {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="light"] .section-title {
    background: linear-gradient(135deg, #1a1a2e, #3D35B0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="light"] .portfolio-title {
    background: linear-gradient(135deg, #1a1a2e, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="light"] .portfolio-visual {
    background: linear-gradient(135deg, rgba(91, 82, 224, 0.08), rgba(0, 153, 204, 0.05));
}

[data-theme="light"] .skill-percent {
    color: var(--primary);
}

[data-theme="light"] .form-input {
    color: var(--text-primary);
    border-bottom-color: rgba(26, 26, 46, 0.12);
}

[data-theme="light"] .footer {
    border-top-color: rgba(26, 26, 46, 0.08);
}

[data-theme="light"] ::-webkit-scrollbar-track {
    background: #f5f7fb;
}

[data-theme="light"] ::-webkit-scrollbar-thumb {
    background: #c5c0ff;
}

[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}