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

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

:root {
    --bg-dark: #0A0E0F;
    --bg-card: #131A1C;
    --bg-elevated: #1A2528;
    --cyan: #00F0FF;
    --cyan-dim: rgba(0, 240, 255, 0.15);
    --cyan-glow: 0 0 20px rgba(0, 240, 255, 0.3);
    --text-primary: #E8F0F0;
    --text-secondary: #8899A0;
    --text-muted: #4A5A60;
    --border: #1E2D30;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    --font-primary: 'Poppins', sans-serif;
    --gradient-cyan: linear-gradient(135deg, #00F0FF, #0088CC);
    --gradient-dark: linear-gradient(135deg, #0A0E0F, #131A1C);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 4px 20px rgba(0, 240, 255, 0.2);
    --transition: 0.25s ease-out;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

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

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

h1, h2, h3, h4 {
    font-family: var(--font-primary);
    color: var(--text-primary);
    line-height: 1.2;
}

ul {
    list-style: none;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-header h2::before {
    content: '# ';
    color: var(--cyan);
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: 24px;
    opacity: 0.6;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 16px;
    max-width: 500px;
    margin: 0 auto;
    font-family: var(--font-mono);
    font-size: 14px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-primary);
    font-size: 16px;
    font-weight: 500;
    padding: 14px 32px;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.4s cubic-bezier(0.15, 0.85, 0.35, 1), box-shadow 0.4s cubic-bezier(0.15, 0.85, 0.35, 1), background 0.4s cubic-bezier(0.15, 0.85, 0.35, 1), color 0.4s cubic-bezier(0.15, 0.85, 0.35, 1), border-color 0.4s cubic-bezier(0.15, 0.85, 0.35, 1);
    border: none;
    text-decoration: none;
}

.btn:active {
    transform: scale(0.96);
}

.btn-primary {
    background: var(--gradient-cyan);
    color: var(--bg-dark);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 240, 255, 0.4);
    color: var(--bg-dark);
}

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

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

.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.15, 0.85, 0.35, 1), transform 0.7s cubic-bezier(0.15, 0.85, 0.35, 1);
}

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

.section-header.fade-in {
    transition-delay: 0.1s;
}

.filter-buttons.fade-in {
    transition-delay: 0.2s;
}

.portfolio-card.fade-in {
    transition: opacity 0.6s cubic-bezier(0.15, 0.85, 0.35, 1), transform 0.6s cubic-bezier(0.15, 0.85, 0.35, 1);
    transform: translateY(40px) scale(0.97);
}

.portfolio-card.fade-in.visible {
    transform: translateY(0) scale(1);
}

.portfolio-card.fade-in:nth-child(1) { transition-delay: 0.03s; }
.portfolio-card.fade-in:nth-child(2) { transition-delay: 0.07s; }
.portfolio-card.fade-in:nth-child(3) { transition-delay: 0.11s; }
.portfolio-card.fade-in:nth-child(4) { transition-delay: 0.15s; }
.portfolio-card.fade-in:nth-child(5) { transition-delay: 0.19s; }
.portfolio-card.fade-in:nth-child(6) { transition-delay: 0.23s; }
.portfolio-card.fade-in:nth-child(7) { transition-delay: 0.27s; }
.portfolio-card.fade-in:nth-child(8) { transition-delay: 0.31s; }
.portfolio-card.fade-in:nth-child(9) { transition-delay: 0.35s; }
.portfolio-card.fade-in:nth-child(10) { transition-delay: 0.39s; }
.portfolio-card.fade-in:nth-child(11) { transition-delay: 0.43s; }
.portfolio-card.fade-in:nth-child(12) { transition-delay: 0.47s; }
.portfolio-card.fade-in:nth-child(13) { transition-delay: 0.51s; }
.portfolio-card.fade-in:nth-child(14) { transition-delay: 0.55s; }
.portfolio-card.fade-in:nth-child(15) { transition-delay: 0.59s; }

.service-card {
    opacity: 0;
    transition: opacity 0.6s cubic-bezier(0.15, 0.85, 0.35, 1), transform 0.6s cubic-bezier(0.15, 0.85, 0.35, 1);
}

.service-card.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.service-card.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.service-card.fade-in-left {
    transform: translateX(-60px);
}

.service-card.fade-in-right {
    transform: translateX(60px);
}

.service-card:nth-child(odd) { transition-delay: 0.05s; }
.service-card:nth-child(even) { transition-delay: 0.2s; }

.about-text {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.7s cubic-bezier(0.15, 0.85, 0.35, 1), transform 0.7s cubic-bezier(0.15, 0.85, 0.35, 1);
}

.about-text.visible {
    opacity: 1;
    transform: translateX(0);
}

.about-image {
    opacity: 0;
    transform: translateX(40px) rotate(-2deg);
    transition: opacity 0.7s cubic-bezier(0.15, 0.85, 0.35, 1), transform 0.7s cubic-bezier(0.15, 0.85, 0.35, 1);
}

.about-image.visible {
    opacity: 1;
    transform: translateX(0) rotate(0deg);
}

.skills-section {
    opacity: 0;
    transform: scale(0.96);
    transition: opacity 0.7s cubic-bezier(0.15, 0.85, 0.35, 1), transform 0.7s cubic-bezier(0.15, 0.85, 0.35, 1);
}

.skills-section.visible {
    opacity: 1;
    transform: scale(1);
}

.skill-tag {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s cubic-bezier(0.15, 0.85, 0.35, 1), transform 0.5s cubic-bezier(0.15, 0.85, 0.35, 1), background 0.4s cubic-bezier(0.15, 0.85, 0.35, 1), color 0.4s cubic-bezier(0.15, 0.85, 0.35, 1), border-color 0.4s cubic-bezier(0.15, 0.85, 0.35, 1), box-shadow 0.4s cubic-bezier(0.15, 0.85, 0.35, 1);
}

.skill-tag.visible {
    opacity: 1;
    transform: translateY(0);
}

.testimonial-card {
    opacity: 0;
    transform: translateX(40px) rotate(1deg);
    transition: opacity 0.6s cubic-bezier(0.15, 0.85, 0.35, 1), transform 0.6s cubic-bezier(0.15, 0.85, 0.35, 1);
}

.testimonial-card.visible {
    opacity: 1;
    transform: translateX(0) rotate(0deg);
}

.testimonial-card:nth-child(1) { transition-delay: 0.05s; }
.testimonial-card:nth-child(2) { transition-delay: 0.15s; }
.testimonial-card:nth-child(3) { transition-delay: 0.25s; }

.contact-content {
    opacity: 0;
    transform: scale(0.92);
    transition: opacity 0.7s cubic-bezier(0.15, 0.85, 0.35, 1), transform 0.7s cubic-bezier(0.15, 0.85, 0.35, 1), box-shadow 0.7s cubic-bezier(0.15, 0.85, 0.35, 1);
}

.contact-content.visible {
    opacity: 1;
    transform: scale(1);
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient-cyan);
    z-index: 1001;
    transition: width 0.05s linear;
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
}

::selection {
    background: var(--cyan);
    color: var(--bg-dark);
}

::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

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

code, .mono {
    font-family: var(--font-mono);
}

.section-divider {
    position: relative;
    height: 60px;
    background: var(--bg-dark);
    overflow: hidden;
}

.section-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 10%;
    right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    transform: translateY(-50%);
    animation: dividerPulse 3s ease-in-out infinite;
}

.section-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    background: var(--cyan);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.6), 0 0 60px rgba(0, 240, 255, 0.2);
    animation: dividerDot 3s ease-in-out infinite;
}

@keyframes dividerPulse {
    0%, 100% { opacity: 0.3; transform: translateY(-50%) scaleX(1); }
    50% { opacity: 0.8; transform: translateY(-50%) scaleX(1.1); }
}

@keyframes dividerDot {
    0%, 100% { box-shadow: 0 0 20px rgba(0, 240, 255, 0.6), 0 0 60px rgba(0, 240, 255, 0.2); }
    50% { box-shadow: 0 0 30px rgba(0, 240, 255, 0.9), 0 0 80px rgba(0, 240, 255, 0.3); }
}