/* Variables */
:root {
    --bg-body: #0f172a;
    /* Slate 900 */
    --bg-header: rgba(15, 23, 42, 0.85);
    --bg-card: #1e293b;
    /* Slate 800 */
    --bg-card-hover: #334155;
    /* Slate 700 */

    --text-main: #f8fafc;
    /* Slate 50 */
    --text-muted: #94a3b8;
    /* Slate 400 */

    --primary: #fbbf24;
    /* Amber 400 - Gold tone */
    --primary-hover: #d97706;
    /* Amber 600 */

    --accent: #38bdf8;
    /* Sky 400 - Cyan tone */

    --gradient-main: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);

    --radius: 12px;
    --transition: all 0.3s ease;

    --container-width: 1200px;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.text-center {
    text-align: center;
}

.section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
}

.accent {
    color: var(--primary);
}

.highlight {
    color: var(--accent);
}

.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Initial States for Animations */
.fade-in-up,
.fade-in-left,
.fade-in-right {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-left {
    transform: translateX(-30px);
}

.fade-in-right {
    transform: translateX(30px);
}

.visible {
    opacity: 1;
    transform: translateY(0) translateX(0);
}

.delay-100 {
    transition-delay: 0.1s;
}

.delay-200 {
    transition-delay: 0.2s;
}

.delay-300 {
    transition-delay: 0.3s;
}

.delay-400 {
    transition-delay: 0.4s;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: var(--primary);
    color: #000;
    border: 2px solid var(--primary);
}

.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--text-main);
    border: 2px solid var(--text-muted);
}

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

.full-width {
    display: block;
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: var(--bg-header);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.nav-list {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    font-size: 1rem;
}

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

.nav-toggle,
.nav-close {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero */
.hero {
    position: relative;
    padding-top: 140px;
    padding-bottom: 80px;
    min-height: 90vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 15% 50%, rgba(56, 189, 248, 0.08) 0%, transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(251, 191, 36, 0.08) 0%, transparent 25%);
    z-index: -1;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-tag {
    display: inline-block;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(56, 189, 248, 0.2);
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

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

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.image-wrapper {
    position: relative;
    width: 400px;
    height: 450px;
    /* Slightly taller for portrait */
}

.professor-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 10;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.geometric-shape {
    position: absolute;
    border-radius: 50%;
    z-index: 0;
}

.shape-1 {
    width: 200px;
    height: 200px;
    background: var(--accent);
    top: -20px;
    right: -20px;
    filter: blur(60px);
    opacity: 0.4;
}

.shape-2 {
    width: 250px;
    height: 250px;
    background: var(--primary);
    bottom: -30px;
    left: -30px;
    filter: blur(60px);
    opacity: 0.4;
    animation: pulse 5s infinite ease-in-out;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.4;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.5;
    }
}

/* Sobre */
.sobre-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.sobre-content p {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
}

.stats {
    display: flex;
    gap: 3rem;
    margin-top: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.card-glass {
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
}

.big-icon {
    width: 64px;
    height: 64px;
    color: var(--accent);
    margin-bottom: 1rem;
}

/* Metodologia */
.metodologia {
    background: #162036;
    /* Slightly lighter/different shade */
}

.grid-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    background: var(--bg-card-hover);
}

.icon-box {
    width: 50px;
    height: 50px;
    background: rgba(251, 191, 36, 0.1);
    color: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Para Quem */
.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.audience-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    transition: var(--transition);
}

.audience-card:hover {
    transform: translateY(-5px);
}

.audience-card.highlight-card {
    background: linear-gradient(145deg, rgba(56, 189, 248, 0.05), rgba(56, 189, 248, 0.15));
    border-color: rgba(56, 189, 248, 0.4);
    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.1);
}

.badge-special {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--accent);
    color: #0f172a;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    text-transform: uppercase;
}

.audience-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.audience-level {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

/* Planos */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.pricing-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
}

.pricing-card.popular {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.1);
    transform: scale(1.03);
    z-index: 10;
}

.tag-popular {
    position: absolute;
    top: 0;
    width: 100%;
    background: var(--primary);
    color: #000;
    text-align: center;
    font-weight: 700;
    font-size: 0.75rem;
    padding: 0.25rem 0;
    text-transform: uppercase;
}

.pricing-header {
    padding: 2.5rem 2rem 1.5rem;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pricing-header h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.period {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 400;
}

.hours {
    margin-top: 0.5rem;
    color: var(--accent);
    font-weight: 500;
}

.pricing-body {
    padding: 2rem;
    flex-grow: 1;
}

.pricing-body ul li {
    margin-bottom: 1rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.95rem;
}

.pricing-body ul li i {
    color: var(--accent);
    width: 18px;
    height: 18px;
}

.pricing-footer {
    padding: 2rem;
    background: rgba(0, 0, 0, 0.2);
}

/* FAQ */
.faq-accordion {
    max-width: 800px;
    margin: 3rem auto 0;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius);
    background: var(--bg-card);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 1.5rem;
    color: var(--text-main);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: inherit;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-icon {
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
    padding-bottom: 1.5rem;
}

.faq-answer p {
    color: var(--text-muted);
}

/* Footer */
.footer {
    padding: 3rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 3rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-logo {
    font-size: 1.25rem;
    display: block;
    margin-bottom: 0.5rem;
}

.footer-left p,
.footer-right p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-email {
    color: var(--primary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    display: inline-block;
}

.footer-email:hover {
    text-decoration: underline;
}

/* WhatsApp Float */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #25D366;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    z-index: 999;
    transition: var(--transition);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(37, 211, 102, 0.4);
}

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

    .hero-image {
        margin-top: 2rem;
    }

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

    .hero-description {
        margin: 0 auto 2.5rem;
    }

    .sobre-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .stats {
        justify-content: center;
    }

    .sobre-image {
        order: -1;
        margin-bottom: 2rem;
        display: flex;
        justify-content: center;
    }

    .card-glass {
        max-width: 400px;
    }

    .pricing-card.popular {
        transform: scale(1);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--bg-card);
        padding: 4rem 2rem;
        transition: right 0.4s ease;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.5);
    }

    .nav.open {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
    }

    .nav-close {
        display: block;
        position: absolute;
        top: 1.5rem;
        right: 1.5rem;
    }

    .nav-btn {
        display: none;
        /* Hide button in burger menu for cleaner look, or move it inside */
    }

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

    .section-title {
        font-size: 2rem;
    }
}