/* ==========================================
   GLOBAL STYLES & RESET
   ========================================== */

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

:root {
    /* Color Palette - Dark Mode Tech Theme */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 15px 40px rgba(102, 126, 234, 0.4);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-family: 'Poppins', sans-serif;
    --font-size-base: 16px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

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

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

ul {
    list-style: none;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Section Styles */
section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-underline {
    width: 80px;
    height: 4px;
    background: var(--gradient-1);
    margin: 0 auto var(--spacing-sm);
    border-radius: 2px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ==========================================
   PARTICLES BACKGROUND
   ========================================== */

#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    background: var(--bg-primary);
}

/* ==========================================
   NAVIGATION
   ========================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-base);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar.scrolled {
    background: rgba(15, 15, 35, 0.98);
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-md);
}

.logo a {
    display: flex;
    align-items: center;
}

.logo-svg {
    height: 40px;
    width: auto;
    transition: var(--transition-base);
}

.logo-svg:hover {
    transform: translateY(-2px);
    filter: drop-shadow(0 5px 15px rgba(102, 126, 234, 0.4));
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition-base);
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: var(--transition-base);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 80%;
}

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

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-content {
    z-index: 1;
}

.hero-greeting {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.hero-name {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-title {
    font-size: 2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    min-height: 60px;
}

.typing-text {
    color: var(--primary-color);
    font-weight: 600;
}

.cursor {
    color: var(--accent-color);
    animation: blink 0.7s infinite;
}

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

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.btn {
    padding: 0.9rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: 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: var(--gradient-1);
    color: white;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.5);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

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

.social-links a {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
    font-size: 1.2rem;
}

.social-links a:hover {
    background: var(--gradient-1);
    transform: translateY(-5px) rotate(360deg);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

/* Hero Image */
.hero-image {
    position: relative;
}

.image-frame {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    animation: float 6s ease-in-out infinite;
}

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

.code-decoration {
    font-size: 8rem;
    font-weight: bold;
    color: rgba(255, 255, 255, 0.1);
    display: flex;
    gap: 1rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator a {
    font-size: 2rem;
    color: var(--primary-color);
    animation: bounce 2s infinite;
}

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

/* ==========================================
   ABOUT SECTION
   ========================================== */

.about {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-intro {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

.about-highlights {
    display: grid;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.highlight-item {
    background: rgba(102, 126, 234, 0.05);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: var(--transition-base);
}

.highlight-item:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateX(10px);
}

.highlight-icon {
    font-size: 2rem;
    color: var(--primary-color);
}

.highlight-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.2rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.about-image {
    position: relative;
}

.image-container {
    width: 100%;
    height: 400px;
    background: var(--gradient-1);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.floating-elements {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.floating-elements i {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.2);
    animation: floatIcon 3s ease-in-out infinite;
}

.floating-elements i:nth-child(1) { animation-delay: 0s; }
.floating-elements i:nth-child(2) { animation-delay: 0.5s; }
.floating-elements i:nth-child(3) { animation-delay: 1s; }
.floating-elements i:nth-child(4) { animation-delay: 1.5s; }

@keyframes floatIcon {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

/* ==========================================
   SKILLS SECTION
   ========================================== */

.skills {
    background: var(--bg-primary);
}

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

.skill-card {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: 15px;
    text-align: center;
    transition: var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: var(--transition-slow);
}

.skill-card:hover::before {
    left: 100%;
}

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

.skill-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition-base);
}

.skill-card:hover .skill-icon {
    transform: scale(1.2) rotateY(360deg);
}

.kotlin-icon {
    background: linear-gradient(135deg, #7F52FF 0%, #F88909 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.csharp-icon {
    background: linear-gradient(135deg, #68217A 0%, #9B4F96 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.skill-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.skill-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ==========================================
   PORTFOLIO SECTION
   ========================================== */

.portfolio {
    background: var(--bg-secondary);
}

.portfolio-disclaimer {
    max-width: 800px;
    margin: var(--spacing-md) auto 0;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(102, 126, 234, 0.1);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.portfolio-disclaimer i {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.portfolio-disclaimer p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.portfolio-disclaimer strong {
    color: var(--primary-color);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.7rem 1.5rem;
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-base);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-1);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.portfolio-item {
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition-base);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.portfolio-item.hide {
    display: none;
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.portfolio-image {
    display: none;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
    display: none;
}

/* Placeholder para cada projeto com cores diferentes */
.portfolio-item[data-category="mobile"]:nth-child(1) .portfolio-image {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.portfolio-item[data-category="web"]:nth-child(2) .portfolio-image {
    background: linear-gradient(135deg, #764ba2, #f093fb);
}

.portfolio-item[data-category="dashboard"]:nth-child(3) .portfolio-image {
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

.portfolio-item[data-category="mobile"]:nth-child(4) .portfolio-image {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
}

.portfolio-item[data-category="web"]:nth-child(5) .portfolio-image {
    background: linear-gradient(135deg, #00f2fe, #43e97b);
}

.portfolio-item[data-category="mobile"]:nth-child(6) .portfolio-image {
    background: linear-gradient(135deg, #43e97b, #38f9d7);
}

.portfolio-item[data-category="dashboard"]:nth-child(7) .portfolio-image {
    background: linear-gradient(135deg, #fa709a, #fee140);
}

.portfolio-item[data-category="web"]:nth-child(8) .portfolio-image {
    background: linear-gradient(135deg, #fee140, #30cfd0);
}

.portfolio-item[data-category="mobile"]:nth-child(9) .portfolio-image {
    background: linear-gradient(135deg, #30cfd0, #330867);
}

.portfolio-item:hover .portfolio-image {
    transform: scale(1.02);
}

/* Info visível do card (fora do overlay) */
.portfolio-info {
    padding: var(--spacing-md);
    background: var(--bg-card);
}

.portfolio-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.portfolio-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.portfolio-info .portfolio-tags {
    margin-bottom: var(--spacing-sm);
}

.portfolio-info .portfolio-tags span {
    padding: 0.3rem 0.8rem;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid var(--primary-color);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary-color);
}

.portfolio-link {
    padding: 0.7rem 1.2rem;
    background: var(--gradient-1);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition-base);
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    width: 100%;
    justify-content: center;
}

.portfolio-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* ==========================================
   SERVICES SECTION
   ========================================== */

.services {
    background: var(--bg-primary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: 15px;
    transition: var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(transparent, rgba(102, 126, 234, 0.1), transparent 30%);
    animation: rotate 4s linear infinite;
}

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

.service-card::after {
    content: '';
    position: absolute;
    inset: 2px;
    background: var(--bg-card);
    border-radius: 13px;
}

.service-card > * {
    position: relative;
    z-index: 1;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition-base);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotateY(360deg);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.service-card > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.service-features i {
    color: var(--primary-color);
    font-size: 0.9rem;
}

/* ==========================================
   TESTIMONIALS SECTION
   ========================================== */

.testimonials {
    background: var(--bg-secondary);
    overflow: hidden;
}

.testimonials-slider {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.testimonial-track {
    display: flex;
    gap: var(--spacing-md);
    transition: transform 0.5s ease;
}

.testimonial-card {
    min-width: 100%;
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.testimonial-content {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.quote-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.testimonial-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    font-style: italic;
}

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

.author-info h4 {
    font-size: 1.2rem;
    margin-bottom: 0.3rem;
}

.author-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.testimonial-rating {
    color: #fbbf24;
    font-size: 1.2rem;
}

.testimonial-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.testimonial-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-1);
    border: none;
    color: white;
    cursor: pointer;
    transition: var(--transition-base);
    font-size: 1.2rem;
}

.testimonial-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

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

.contact {
    background: var(--bg-primary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.contact-details {
    margin-bottom: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    background: rgba(102, 126, 234, 0.05);
    border-radius: 10px;
    transition: var(--transition-base);
}

.contact-item:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateX(10px);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.contact-text h4 {
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

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

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

.contact-social {
    display: flex;
    gap: var(--spacing-sm);
}

.contact-social a {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: var(--transition-base);
}

.contact-social a:hover {
    transform: translateY(-5px) rotate(360deg);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

/* Contact Form */
.contact-form {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.form-group {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid transparent;
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
}

.form-group label {
    position: absolute;
    left: 3rem;
    top: 1rem;
    color: var(--text-secondary);
    transition: var(--transition-base);
    pointer-events: none;
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.7rem;
    left: 1rem;
    font-size: 0.85rem;
    color: var(--primary-color);
    background: var(--bg-card);
    padding: 0 0.5rem;
}

.form-group > i {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.submit-btn {
    width: 100%;
    position: relative;
}

.btn-loading {
    display: none;
}

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

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

.form-message {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: 8px;
    display: none;
    text-align: center;
}

.form-message.success {
    display: block;
    background: rgba(72, 187, 120, 0.1);
    color: #48bb78;
    border: 1px solid #48bb78;
}

.form-message.error {
    display: block;
    background: rgba(245, 101, 101, 0.1);
    color: #f56565;
    border: 1px solid #f56565;
}

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

.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-logo-svg {
    height: 40px;
    width: auto;
    margin-bottom: var(--spacing-sm);
}

.footer-logo p {
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

.footer-links h4,
.footer-social h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.footer-links ul li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.social-icons a {
    width: 45px;
    height: 45px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
    font-size: 1.2rem;
}

.social-icons a:hover {
    background: var(--gradient-1);
    transform: translateY(-5px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
}

/* ==========================================
   BACK TO TOP BUTTON
   ========================================== */

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.5);
}

/* ==========================================
   PROJECT MODAL
   ========================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background: var(--bg-card);
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: 20px;
    z-index: 1;
    animation: modalSlideIn 0.3s ease;
    margin: 0 var(--spacing-md);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-base);
    z-index: 2;
}

.modal-close:hover {
    background: var(--primary-color);
    transform: rotate(90deg);
}

.modal-body {
    padding: var(--spacing-md);
}

.modal-image {
    display: none;
}

.modal-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.modal-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.modal-tags span {
    padding: 0.4rem 1rem;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid var(--primary-color);
    border-radius: 20px;
    color: var(--primary-color);
    font-size: 0.9rem;
}

.modal-features,
.modal-tech {
    margin-bottom: var(--spacing-md);
}

.modal-features h3,
.modal-tech h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.features-list,
.tech-list {
    list-style: none;
}

.features-list li,
.tech-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.features-list li::before {
    content: '✓ ';
    color: var(--primary-color);
    font-weight: bold;
    margin-right: 0.5rem;
}

.modal-links {
    display: flex;
    gap: var(--spacing-sm);
}

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

@media (max-width: 768px) {
    /* Navigation */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        flex-direction: column;
        background: rgba(15, 15, 35, 0.98);
        backdrop-filter: blur(10px);
        padding: var(--spacing-md);
        transition: var(--transition-base);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    /* Hero */
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-name {
        font-size: 2.5rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

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

    .hero-image {
        display: none;
    }

    /* About */
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        display: none;
    }

    /* Skills */
    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }

    /* Portfolio */
    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
    }

    /* Contact */
    .contact-content {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .social-icons {
        justify-content: center;
    }

    /* Section Title */
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-base: 14px;
    }

    .hero-name {
        font-size: 2rem;
    }

    .btn {
        padding: 0.7rem 1.5rem;
        font-size: 0.9rem;
    }

    .portfolio-filters {
        flex-direction: column;
    }
}

/* ==========================================
   SCROLLBAR CUSTOMIZATION
   ========================================== */

::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gradient-1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-2);
}

/* ==========================================
   SELECTION STYLE
   ========================================== */

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

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