/* ========================================
   ENGLISH AT SKILLS ENGINEER - ULTRA MODERN
   Premium Design with Advanced Animations
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Poppins:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
    --primary: #00ff88;
    --primary-dark: #00cc6a;
    --primary-light: #33ffaa;
    --accent: #00d9ff;
    --bg-dark: #0a0e27;
    --bg-darker: #050814;
    --bg-card: rgba(26, 35, 71, 0.6);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --text-muted: #7a8ba3;
    --border: rgba(0, 255, 136, 0.1);
    --shadow-green: 0 20px 60px rgba(0, 255, 136, 0.3);
    --shadow-blue: 0 20px 60px rgba(0, 217, 255, 0.2);
    --gradient-1: linear-gradient(135deg, #00ff88 0%, #00d9ff 100%);
    --gradient-2: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-3: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

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

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-darker);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 217, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(102, 126, 234, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* === TYPOGRAPHY === */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
    letter-spacing: -2px;
}

h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: -1px;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 700;
}

/* === HEADER === */
.header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header.scrolled {
    background: rgba(10, 14, 39, 0.95);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    transition: transform 0.3s ease;
    position: relative;
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-image {
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.logo:hover .logo-image {
    transform: scale(1.05);
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    font-family: 'Poppins', sans-serif;
    white-space: nowrap;
}

@media (max-width: 768px) {
    .logo-text {
        display: none;
    }
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    color: var(--bg-dark);
    box-shadow: var(--shadow-green);
    position: relative;
    overflow: hidden;
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transform: rotate(45deg);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }

    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.nav {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav a {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 1rem;
    position: relative;
    padding: 0.5rem 0;
    transition: all 0.3s ease;
}

.nav a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav a:hover,
.nav a.active {
    color: var(--primary);
}

.nav a:hover::before,
.nav a.active::before {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* === MAIN CONTENT === */
.main-content {
    margin-top: 90px;
    position: relative;
    z-index: 1;
}

/* === HERO SECTION === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 4rem 2rem;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(0, 255, 136, 0.15), transparent 70%);
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.1), transparent 70%);
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {

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

    50% {
        transform: translate(50px, 50px) scale(1.1);
    }
}

.hero-content {
    max-width: 1200px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-tagline {
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero h1 {
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease 0.4s backwards;
    text-shadow: 0 0 80px rgba(0, 255, 136, 0.3);
}

.hero-description {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.8s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

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

/* === BUTTONS === */
.btn {
    padding: 1.2rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    border: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 400px;
    height: 400px;
}

.btn span {
    position: relative;
    z-index: 1;
}

.btn-primary {
    background: var(--gradient-1);
    color: var(--bg-dark);
    box-shadow: var(--shadow-green);
}

.btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 70px rgba(0, 255, 136, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.2);
}

.btn-secondary:hover {
    background: var(--primary);
    color: var(--bg-dark);
    transform: translateY(-5px);
    box-shadow: var(--shadow-green);
}

/* === SECTION === */
.section {
    padding: 6rem 2rem;
    position: relative;
}

.section-container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-subtitle {
    color: var(--primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.section-title {
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-description {
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

/* === CARDS === */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 2.5rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.card:hover {
    transform: translateY(-15px);
    border-color: var(--primary);
    box-shadow: var(--shadow-green);
}

.card:hover::before {
    opacity: 0.05;
}

.card:hover::after {
    transform: scaleX(1);
}

.card-image {
    width: 100%;
    height: 220px;
    border-radius: 16px;
    object-fit: cover;
    margin-bottom: 1.5rem;
    transition: transform 0.4s ease;
}

.card:hover .card-image {
    transform: scale(1.05);
}

.card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.card-link {
    color: var(--primary);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.3s ease;
    position: relative;
    z-index: 1;
}

.card-link:hover {
    gap: 1rem;
}

/* === HERO IMAGE === */
.hero-image {
    width: 100%;
    max-width: 900px;
    height: 500px;
    border-radius: 24px;
    object-fit: cover;
    margin: 3rem auto 0;
    display: block;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
    animation: fadeInUp 1s ease 1s backwards;
}

/* === FEATURE GRID === */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, var(--primary), transparent 30%);
    animation: rotate 4s linear infinite;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover::before {
    opacity: 0.1;
}

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

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 50px rgba(0, 255, 136, 0.2);
}

.feature-number {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.feature-card h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
    position: relative;
    z-index: 1;
}

.feature-card p {
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
}

/* === IMAGE SECTION === */
.image-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.image-card {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    height: 350px;
    cursor: pointer;
}

.image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
    transform: translateY(100%);
    transition: transform 0.4s ease;
}

.image-card:hover .image-overlay {
    transform: translateY(0);
}

.image-overlay h4 {
    color: white;
    margin-bottom: 0.5rem;
}

.image-overlay p {
    color: rgba(255, 255, 255, 0.8);
}

/* === FORM === */
.form-container {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 3rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 255, 136, 0.1);
    background: rgba(255, 255, 255, 0.08);
}

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

/* === FOOTER === */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
    padding: 4rem 2rem 2rem;
    margin-top: 6rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.footer-section p,
.footer-section a {
    color: var(--text-secondary);
    display: block;
    margin-bottom: 0.8rem;
    transition: all 0.3s ease;
}

.footer-section a:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
}

/* === QUIZ === */
.quiz-container {
    max-width: 900px;
    margin: 0 auto;
}

.quiz-question {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2.5rem;
    margin-bottom: 2rem;
}

.quiz-question h3 {
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.quiz-option {
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 1.2rem 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.quiz-option:hover {
    border-color: var(--primary);
    background: rgba(0, 255, 136, 0.05);
    transform: translateX(10px);
}

.quiz-option input[type="radio"] {
    width: 22px;
    height: 22px;
    accent-color: var(--primary);
}

.quiz-option label {
    cursor: pointer;
    flex: 1;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* === CONTACT INFO === */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-item {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    transition: all 0.4s ease;
}

.contact-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 50px rgba(0, 255, 136, 0.2);
}

.contact-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.contact-item p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.contact-item a {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.1rem;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 14, 39, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.4s ease;
    }

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

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

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

    .image-section {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }
}

/* === ANIMATIONS === */
.fade-in {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in-delay-1 {
    animation-delay: 0.2s;
}

.fade-in-delay-2 {
    animation-delay: 0.4s;
}

.fade-in-delay-3 {
    animation-delay: 0.6s;
}

/* === SCROLL REVEAL === */
.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* === LOADING ANIMATION === */
@keyframes pulse-glow {

    0%,
    100% {
        box-shadow: 0 0 20px rgba(0, 255, 136, 0.4);
    }

    50% {
        box-shadow: 0 0 40px rgba(0, 255, 136, 0.8);
    }
}