/* Variables & Reset */
:root {
    --primary-color: #4f46e5; /* Indigo 600 */
    --primary-dark: #4338ca;
    --secondary-color: #06b6d4; /* Cyan 500 */
    --accent-color: #f472b6; /* Pink 400 */
    --dark-bg: #0f172a; /* Slate 900 */
    --light-bg: #f8fafc; /* Slate 50 */
    --text-main: #1e293b; /* Slate 800 */
    --text-light: #64748b; /* Slate 500 */
    --white: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.9);

    --font-main: "Outfit", sans-serif;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1),
        0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
        0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navbar */
.navbar {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    height: 80px;
    display: flex;
    align-items: center;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    color: var(--text-main);
}

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

.nav-links a {
    font-weight: 500;
    color: var(--text-main);
    font-size: 1.05rem;
}

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

.btn-login {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    box-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.39);
}

.btn-login:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-main);
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -100px;
    right: -100px;
    width: 600px;
    height: 600px;
    background: radial-gradient(
        circle,
        rgba(79, 70, 229, 0.1) 0%,
        rgba(255, 255, 255, 0) 70%
    );
    border-radius: 50%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--dark-bg);
}

.hero-text h1 span {
    background: linear-gradient(
        to right,
        var(--primary-color),
        var(--secondary-color)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    box-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.39);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(79, 70, 229, 0.39);
}

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

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

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

/* Common Section Styles */
.section {
    padding: 100px 0;
}

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

.section-header h2 {
    font-size: 2.5rem;
    color: var(--dark-bg);
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    background: #eef2ff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--dark-bg);
}

.feature-card p {
    color: var(--text-light);
}

/* Tech Section */
.tech-section {
    background: var(--light-bg);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.tech-item {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease;
}

.tech-item:hover {
    transform: scale(1.05);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: -webkit-linear-gradient(
        var(--primary-color),
        var(--secondary-color)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tech-item h4 {
    color: var(--dark-bg);
    margin-bottom: 0.5rem;
}

/* Footer */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 80px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-col h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--white);
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #94a3b8;
}

.footer-col p {
    color: #94a3b8;
    margin-bottom: 1.5rem;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col ul li a {
    color: #cbd5e1;
}

.footer-col ul li a:hover {
    color: var(--white);
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 36px;
    height: 36px;
    background: #1e293b;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--white);
}

.social-links a:hover {
    background: var(--primary-color);
}

.contact-info li {
    display: flex;
    gap: 10px;
    color: #cbd5e1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #1e293b;
    color: #64748b;
}

/* Mobile Responsive */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hero-text p {
        margin: 0 auto 2rem;
    }

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

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--white);
        padding: 2rem;
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    /* Top Bar Mobile Logic */
    .top-bar {
        display: none;
    }
    
    .navbar {
        top: 0 !important;
        height: 80px !important;
    }
}

/* Top Bar Styles */
/* Top Bar Styles */
/* Top Bar Styles */
/* Top Bar Styles */
.top-bar {
    background: linear-gradient(0deg, #4f46e5 0%, #8EC5FC 100%);
    color: var(--white);
    padding: 8px 0;
    font-size: 0.9rem;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1002;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
    text-shadow: 0 1px 3px rgba(0,0,0,0.5); /* Ensure visibility on white parts */
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--white);
    font-weight: 500;
}

.contact-item i {
    color: var(--white);
}

.social-icons {
    display: flex;
    gap: 1rem;
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 1px solid rgba(255, 255, 255, 0.4);
}

.social-icons a {
    color: var(--white);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.social-icons a:hover {
    color: var(--dark-bg);
    transform: translateY(-1px);
    text-shadow: none;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.top-link {
    color: var(--white);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.top-link:hover {
    color: var(--dark-bg);
    text-shadow: none;
}

.aula-virtual-btn {
    background: rgba(255, 255, 255, 0.2); /* Semi-transparent */
    color: var(--white);
    border: 1px solid var(--white);
    padding: 0.4rem 1rem;
    border-radius: 4px;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.aula-virtual-btn:hover {
    background: var(--white);
    color: var(--primary-color);
    text-shadow: none;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.15);
}

/* Adjust Navbar Position if Desktop */
@media (min-width: 769px) {
    .navbar {
        top: 40px;
        height: 70px;
    }
    /* Adjust hero padding to account for total header height (40 + 70 = 110) */
    .hero {
        padding-top: 190px;
    }
}

/* Animations & Modern Effects */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal-scale.active {
    opacity: 1;
    transform: scale(1);
}

/* Staggered Delays */
.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }

/* Float Animation Enhanced */
@keyframes float-modern {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

.animate-float {
    animation: float-modern 4s ease-in-out infinite;
}

/* Pulse Glow */
@keyframes pulse-glow {
    0% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(79, 70, 229, 0); }
    100% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0); }
}

.pulse-btn {
    animation: pulse-glow 2s infinite;
}