/* ============================================
   PROFESSIONAL PORTFOLIO - CSS FRAMEWORK
   Theme: Dark (#080808) + Red Accent (#ff0000)
   Responsive Design with Modern Effects
   ============================================ */

/* ============= ROOT VARIABLES ============= */
:root {
    /* Colors */
    --bg-dark: #080808;
    --bg-dark-secondary: #111111;
    --text-white: #ffffff;
    --text-gray: #b0b0b0;
    --text-gray-light: #808080;
    --accent-red: #ff0000;
    --accent-red-light: #ff4444;
    --accent-red-dark: #cc0000;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 5rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 50%;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s ease;
    --transition-smooth: 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(255, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(255, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(255, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(255, 0, 0, 0.25);
    
    /* Glow Effects */
    --glow-red: rgba(255, 0, 0, 0.5);
    --glow-red-light: rgba(255, 68, 68, 0.4);
}

/* ============= GLOBAL STYLES ============= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
    background: linear-gradient(135deg, #080808 0%, #0f0f0f 50%, #0a0a0a 100%);
    min-height: 100vh;
}

/* ============= SCROLLBAR ============= */
::-webkit-scrollbar {
    width: 12px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--accent-red);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-red-light);
}

/* ============= CONTAINER ============= */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-lg);
}

/* ============= SECTION HEADER ============= */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-white);
    position: relative;
    display: inline-block;
}

.section-header h2::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 30px;
    background: var(--accent-red);
    border-radius: var(--radius-sm);
}

.header-line {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-red), transparent);
    margin: var(--spacing-md) auto 0;
    border-radius: var(--radius-sm);
}

/* ============= NAVBAR ============= */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(8, 8, 8, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--accent-red);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md) 0;
}

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

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-red);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    letter-spacing: 1px;
    transition: all var(--transition-normal);
}

.navbar-brand:hover {
    transform: scale(1.05);
    text-shadow: 0 0 10px var(--glow-red);
}

.navbar-brand i {
    font-size: 1.8rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.nav-menu {
    display: flex;
    gap: var(--spacing-2xl);
    align-items: center;
}

.nav-link {
    color: var(--text-white);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color var(--transition-normal);
    padding: var(--spacing-sm) var(--spacing-md);
}

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

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-white);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(10px, 10px);
}

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

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

/* ============= HERO SECTION ============= */
.hero-section {
    /* Trừ đi chiều cao của navbar để không bị đẩy quá khung hình */
    scroll-margin-top: 100px;
    min-height: calc(100vh - 80px); 
    display: flex;
    align-items: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    position: relative;
    overflow: hidden;
    
    /* Tạo khoảng cách an toàn phía trên */
    margin-top: 20px; 
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content {
    z-index: 2;
}

.greeting h4 {
    font-size: 1.1rem;
    color: var(--accent-red);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    letter-spacing: 2px;
}

.greeting h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--text-white);
    line-height: 1.2;
}
/* ============= TYPING ANIMATION UPDATED ============= */
.typing-container {
    /* Tăng min-height để khớp với font-size 2rem + line-height */
    min-height: 3.5rem; 
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    overflow: hidden; /* Ngăn chặn bất kỳ sự tràn khung nào khi gõ */
}

.typing-text {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-red);
    display: inline-block;
    min-width: 2px;
    line-height: 1.2;
    vertical-align: middle;
    /* Quan trọng: Ngăn chữ dài như "Manual & Automation..." nhảy dòng gây khựng */
    white-space: nowrap; 
}

/* Con trỏ của Typed.js */
.typed-cursor {
    font-size: 2rem;
    color: var(--accent-red);
    margin-left: 4px;
    vertical-align: middle;
}

/* Mobile Responsive: Tỉ lệ chuẩn để không vỡ layout */
@media (max-width: 768px) {
    .typing-container {
        min-height: 2.8rem;
    }
    .typing-text, .typed-cursor {
        font-size: 1.6rem; /* Cân chỉnh lại để vừa màn hình máy tính bảng */
    }
}

@media (max-width: 480px) {
    .typing-container {
        min-height: 2.2rem;
    }
    .typing-text, .typed-cursor {
        font-size: 1.3rem; /* Cân chỉnh cho điện thoại nhỏ */
    }
}
.hero-description {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    white-space: nowrap;
    text-align: center;
}

.btn-primary {
    background: var(--accent-red);
    color: var(--text-white);
    box-shadow: 0 0 20px var(--glow-red);
}

.btn-primary:hover {
    background: var(--accent-red-light);
    transform: translateY(-3px);
    box-shadow: 0 0 30px var(--glow-red);
}

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

.btn-secondary:hover {
    background: var(--accent-red);
    color: var(--text-white);
    transform: translateY(-3px);
    box-shadow: 0 0 20px var(--glow-red);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-3xl);
    font-size: 1.1rem;
}

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

.social-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    border: 2px solid var(--accent-red);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-red);
    text-decoration: none;
    font-size: 1.5rem;
    transition: all var(--transition-normal);
}

.social-icon:hover {
    background: var(--accent-red);
    color: var(--text-white);
    transform: translateY(-5px);
    box-shadow: 0 0 20px var(--glow-red);
}

.hero-image {
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

/* ============= AVATAR & SPIDER-WEB RINGS SYSTEM ============= */
.avatar-wrapper {
    position: relative;
    width: 350px;
    height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 60px auto; /* Tăng margin để chừa chỗ cho mạng nhện tỏa ra */
}

.avatar-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #080808; /* Viền đen dày hơn để tách biệt với mạng nhện */
    position: relative;
    z-index: 5;
}

.avatar-glow {
    position: absolute;
    inset: -12px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, #ff0000, #b10000, #ff4444, #ff0000);
    opacity: 0.6;
    animation: rotate-infinite 6s linear infinite; 
    z-index: 4;
}

/* Vòng 1: Nét đứt dày - Cận vệ của Spider */
.outer-ring-1 {
    position: absolute;
    inset: -35px; 
    border-radius: 50%;
    border: 3px dashed rgba(255, 0, 0, 0.7); 
    animation: rotate-reverse-infinite 15s linear infinite;
    z-index: 3;
}

/* Vòng 2: Nét đôi (Double) - Tạo hiệu ứng sợi tơ */
.outer-ring-2 {
    position: absolute;
    inset: -70px;
    border-radius: 50%;
    /* Kiểu double tạo ra 2 đường kẻ song song cực mỏng giống tơ nhện */
    border: 4px double rgba(255, 0, 0, 0.4);
    animation: rotate-infinite 25s linear infinite;
    z-index: 2;
}

/* Vòng 3: "Spider-Web" - Thưa và tỏa rộng nhất */
.outer-ring-3 {
    position: absolute;
    inset: -110px; /* Tỏa rộng ra hẳn bên ngoài */
    border-radius: 50%;
    /* Dùng nét đứt thưa (dashed) nhưng mảnh và nhạt hơn */
    border: 1.5px dashed rgba(255, 0, 0, 0.25);
    /* Xoay cực chậm để không gây rối mắt */
    animation: rotate-reverse-infinite 45s linear infinite;
    z-index: 1;
}

/* ============= KEYFRAMES ============= */
@keyframes rotate-infinite {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes rotate-reverse-infinite {
    from { transform: rotate(360deg); }
    to { transform: rotate(0deg); }
}

/* Mobile: Tối ưu cho màn hình nhỏ */
@media (max-width: 768px) {
    .avatar-wrapper {
        width: 220px;
        height: 220px;
        margin: 80px auto; 
    }
    .outer-ring-1 { inset: -25px; border-width: 2px; }
    .outer-ring-2 { inset: -50px; border-width: 3px; }
    .outer-ring-3 { inset: -80px; border-width: 1px; }
}
/* ============= SCROLL INDICATOR ============= */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 2;
    animation: bounce 2s ease-in-out infinite;
}

.scroll-indicator p {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--accent-red);
    border-radius: 13px;
    margin: 0 auto;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    width: 2px;
    height: 6px;
    background: var(--accent-red);
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 1px;
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0%, 100% { top: 8px; opacity: 1; }
    100% { top: 15px; opacity: 0; }
}

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

/* ============= ABOUT SECTION ============= */
.about-section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(255, 0, 0, 0.05) 0%, transparent 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-text p {
    color: var(--text-gray);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.about-stats {
    display: grid;
    gap: var(--spacing-lg);
}

.stat-box {
    background: rgba(255, 0, 0, 0.1);
    border-left: 4px solid var(--accent-red);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.stat-box:hover {
    background: rgba(255, 0, 0, 0.15);
    transform: translateX(10px);
}

.stat-box h3 {
    font-size: 2.5rem;
    color: var(--accent-red);
    margin-bottom: var(--spacing-sm);
}

.stat-box p {
    color: var(--text-gray);
    font-size: 1rem;
}

/* ============= SERVICES SECTION ============= */
.services-section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, transparent 0%, rgba(255, 0, 0, 0.05) 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.service-card {
    background: rgba(255, 0, 0, 0.05);
    border: 2px solid transparent;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.service-card:hover {
    border-color: var(--accent-red);
    background: rgba(255, 0, 0, 0.1);
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    font-size: 3rem;
    color: var(--accent-red);
    margin-bottom: var(--spacing-lg);
    display: inline-block;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-white);
}

.service-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* ============= PORTFOLIO SECTION ============= */
.portfolio-section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(255, 0, 0, 0.03) 0%, transparent 50%);
}

.portfolio-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
    flex-wrap: wrap;
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 2px solid var(--accent-red);
    color: var(--accent-red);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-normal);
    font-size: 1rem;
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--accent-red);
    color: var(--text-white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.portfolio-item {
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-normal);
    animation: fadeInUp 0.6s ease;
}

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

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

.portfolio-image {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
    border-radius: var(--radius-xl);
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.overlay-content {
    text-align: center;
    color: var(--text-white);
}

.overlay-content h4 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.overlay-content p {
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.overlay-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.overlay-btn {
    width: 45px;
    height: 45px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid var(--text-white);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.overlay-btn:hover {
    background: var(--text-white);
    color: var(--accent-red);
    transform: scale(1.1);
}

/* ============= TESTIMONIALS SECTION (STACKING EFFECT) ============= */
.testimonials-section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, transparent 0%, rgba(255, 0, 0, 0.05) 100%);
}

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

/* Chuyển carousel thành dạng cột để tạo hiệu ứng xếp chồng khi cuộn dọc */
.testimonials-carousel {
    display: flex;
    flex-direction: column;
    gap: 60px; /* Khoảng cách giữa các thẻ - Giúp không bị sát nhau */
    padding-bottom: var(--spacing-xl);
}

.testimonial-card {
    background: rgba(17, 17, 17, 0.95); /* Nền tối để nổi bật nội dung */
    border: 2px solid var(--accent-red);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    
    /* Hiệu ứng Sticky - Kéo thư mục */
    position: sticky;
    top: 100px; /* Thẻ sẽ dừng lại cách đỉnh màn hình 100px */
    
    /* Chiều sâu và hiệu ứng chuyển cảnh */
    box-shadow: 0 -15px 35px rgba(0, 0, 0, 0.6);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(10px);
    
    /* Đảm bảo thẻ hiển thị (ghi đè opacity 0 cũ) */
    opacity: 1;
    transform: translateY(0);
}

/* Tạo hiệu ứng thu nhỏ dần cho các thẻ nằm dưới khi cuộn */
.testimonial-card:nth-child(1) { z-index: 1; }
.testimonial-card:nth-child(2) { z-index: 2; margin-top: -20px; }
.testimonial-card:nth-child(3) { z-index: 3; margin-top: -20px; }

.stars {
    font-size: 2.5rem; /* Tăng kích thước icon mục tiêu */
    color: var(--accent-red);
    margin-bottom: var(--spacing-md);
}

.testimonial-text {
    color: var(--text-white);
    font-size: 1.15rem;
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    font-weight: 300;
}

.testimonial-author h4 {
    color: var(--accent-red);
    font-size: 1.3rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-xs);
}

.testimonial-author p {
    color: var(--text-gray);
    font-size: 1rem;
    font-weight: 500;
}

/* Ẩn bộ điều khiển vì đã chuyển sang cuộn dọc */
.carousel-controls {
    display: none;
}

/* ============= RESPONSIVE (MEDIA QUERIES) ============= */
@media (max-width: 768px) {
    .testimonials-section {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .testimonials-carousel {
        gap: 40px; /* Giảm khoảng cách trên mobile */
    }

    .testimonial-card {
        top: 80px; /* Dịch lên một chút trên màn hình nhỏ */
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .testimonial-text {
        font-size: 1rem;
    }

    .stars i {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .testimonial-card {
        top: 70px;
    }
    
    .testimonial-author h4 {
        font-size: 1.1rem;
    }
}

/* ============= CONTACT SECTION ============= */
.contact-section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(255, 0, 0, 0.05) 0%, transparent 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-3xl);
}

.contact-info {
    display: grid;
    gap: var(--spacing-2xl);
}

.info-box {
    background: rgba(255, 0, 0, 0.08);
    border-left: 4px solid var(--accent-red);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
}

.info-icon {
    font-size: 2rem;
    color: var(--accent-red);
    margin-bottom: var(--spacing-sm);
}

.info-box h4 {
    color: var(--text-white);
    margin-bottom: var(--spacing-sm);
}

.info-box p {
    color: var(--text-gray);
}

.contact-form {
    display: grid;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-input {
    padding: var(--spacing-md);
    background: rgba(255, 0, 0, 0.05);
    border: 2px solid rgba(255, 0, 0, 0.2);
    border-radius: var(--radius-lg);
    color: var(--text-white);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-normal);
}

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

.form-input:focus {
    outline: none;
    background: rgba(255, 0, 0, 0.1);
    border-color: var(--accent-red);
    box-shadow: 0 0 10px var(--glow-red);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

/* ============= FOOTER ============= */
.footer {
    background: var(--bg-dark-secondary);
    border-top: 2px solid var(--accent-red);
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-lg);
    margin-top: var(--spacing-3xl);
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h3,
.footer-section h4 {
    color: var(--accent-red);
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: var(--text-gray);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
    display: grid;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.footer-links a:hover {
    color: var(--accent-red);
    padding-left: var(--spacing-sm);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 0, 0, 0.1);
    color: var(--text-gray);
}

/* ============= RESPONSIVE DESIGN ============= */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(8, 8, 8, 0.98);
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal);
        border-bottom: 2px solid var(--accent-red);
    }
    
    .nav-menu.active {
        max-height: 500px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .greeting h1 {
        font-size: 2.5rem;
    }
    
    .typing-text {
        font-size: 1.5rem;
        min-width: 150px;
    }
    
    .hero-image {
        order: -1;
    }
    
    .avatar-wrapper {
        width: 250px;
        height: 250px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-header h2::before {
        left: -20px;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: var(--spacing-lg);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .section-container {
        padding: var(--spacing-md);
    }
    
    .greeting h1 {
        font-size: 2rem;
    }
    
    .typing-text {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.95rem;
    }
    
    .portfolio-tabs {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .tab-btn {
        width: 100%;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}