/* ===== Variables ===== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --coin: #fbbf24;

    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    --white: #ffffff;
    --black: #000000;

    --font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* ===== Reset ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-900);
    background: var(--white);
}

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

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

ul {
    list-style: none;
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--gray-100);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
}

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

.btn-white:hover {
    background: var(--gray-100);
    transform: translateY(-1px);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

/* ===== Section Titles ===== */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-500);
    text-align: center;
    margin-bottom: 3rem;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    background: linear-gradient(
        135deg,
        var(--primary) 0%,
        var(--secondary) 100%
    );
    color: var(--white);
    overflow: hidden;
    padding: 0 1rem;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 0;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.logo-icon {
    width: 40px;
    height: 40px;
}

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

.nav-links a {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--white);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: all 0.3s;
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.hero-hint {
    font-size: 0.875rem;
    opacity: 0.8;
}

.hero-image {
    max-width: 400px;
    margin: 0 auto;
    padding-bottom: 4rem;
}

.screenshot-placeholder {
    background: rgba(255, 255, 255, 0.1);
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-xl);
    padding: 4rem 2rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.screenshot-placeholder.small {
    padding: 3rem 1.5rem;
    background: var(--gray-100);
    border-color: var(--gray-300);
    color: var(--gray-500);
}

/* Floating coins animation */
.hero-coins {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
}

.floating-coin {
    position: absolute;
    width: 30px;
    height: 30px;
    background: var(--coin);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}

.coin-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}
.coin-2 {
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}
.coin-3 {
    bottom: 30%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes float {
    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

/* ===== Problem/Solution Section ===== */
.problem-solution {
    padding: 5rem 0;
    background: var(--white);
}

.ps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.ps-column h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.ps-problem h2 {
    color: var(--danger);
}
.ps-solution h2 {
    color: var(--success);
}

.ps-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.ps-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    font-size: 1.125rem;
    align-items: center;
}

.ps-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

/* ===== How It Works Section ===== */
.how-it-works {
    padding: 5rem 0;
    background: var(--gray-50);
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.step-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    text-align: center;
    position: relative;
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.step-icon {
    font-size: 3rem;
    margin: 1rem 0;
}

.step-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.step-card p {
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

/* ===== Features Section ===== */
.features {
    padding: 5rem 0;
}

.features-kids {
    background: var(--white);
}

.features-parents {
    background: linear-gradient(
        135deg,
        rgba(99, 102, 241, 0.05) 0%,
        rgba(139, 92, 246, 0.05) 100%
    );
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.feature-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
    transition:
        transform 0.2s,
        box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

/* ===== Gallery Section ===== */
.gallery {
    padding: 5rem 0;
    background: var(--gray-50);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

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

.gallery-item .screenshot-placeholder {
    background: var(--white);
    border-color: var(--gray-200);
    color: var(--gray-400);
    margin-bottom: 0.75rem;
    padding: 3rem 1rem;
}

.gallery-item p {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* ===== Comparison Section ===== */
.comparison {
    padding: 5rem 0;
    background: var(--white);
}

.table-wrapper {
    overflow-x: auto;
    margin-bottom: 1rem;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.comparison-table th {
    background: var(--gray-50);
    font-weight: 600;
}

.comparison-table th.highlight,
.comparison-table td.highlight {
    background: rgba(99, 102, 241, 0.1);
}

.check {
    color: var(--success);
    font-weight: bold;
}

.cross {
    color: var(--gray-400);
}

.table-note {
    text-align: center;
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* ===== Testimonials Section ===== */
.testimonials {
    padding: 5rem 0;
    background: var(--gray-50);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.testimonial-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.testimonial-avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.testimonial-text {
    font-style: italic;
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.testimonial-author {
    font-weight: 600;
    color: var(--gray-900);
}

/* ===== Pricing Section ===== */
.pricing {
    padding: 5rem 0;
    background: var(--white);
}

.pricing-card {
    max-width: 400px;
    margin: 0 auto 2rem;
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--primary);
    text-align: center;
    position: relative;
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--coin);
    color: var(--gray-900);
    padding: 0.25rem 1rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.pricing-price {
    margin: 1.5rem 0;
}

.price-old {
    font-size: 1.25rem;
    color: var(--gray-400);
    text-decoration: line-through;
    margin-right: 0.5rem;
}

.price-current {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
}

.pricing-features {
    text-align: left;
    margin-bottom: 2rem;
}

.pricing-features li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.pricing-features .check {
    font-size: 1.25rem;
}

.pricing-note {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--gray-500);
}

.pricing-future {
    text-align: center;
    color: var(--gray-600);
}

/* ===== FAQ Section ===== */
.faq {
    padding: 5rem 0;
    background: var(--gray-50);
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1.25rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    color: var(--gray-900);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary);
    transition: transform 0.3s;
}

.faq-item.open .faq-icon {
    transform: rotate(45deg);
}

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

.faq-item.open .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--gray-600);
}

/* ===== Final CTA Section ===== */
.final-cta {
    padding: 5rem 0;
    background: linear-gradient(
        135deg,
        var(--primary) 0%,
        var(--secondary) 100%
    );
    color: var(--white);
    text-align: center;
}

.final-cta h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.final-cta p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.cta-hint {
    margin-top: 1rem;
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ===== Footer ===== */
.footer {
    background: var(--gray-800);
    color: var(--white);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
    font-weight: 600;
}

.footer-logo .logo-icon {
    width: 32px;
    height: 32px;
}

.footer-nav {
    display: flex;
    gap: 2rem;
}

.footer-nav a {
    color: var(--gray-400);
    transition: color 0.2s;
}

.footer-nav a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-700);
}

.footer-bottom p {
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* ===== Media Queries ===== */

/* Tablet */
@media (min-width: 640px) {
    .hero h1 {
        font-size: 3rem;
    }

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

    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .hero h1 {
        font-size: 3.5rem;
    }

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

    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-content {
        flex-direction: row;
        justify-content: space-between;
    }
}

/* Mobile menu */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-dark);
        flex-direction: column;
        padding: 1rem;
        gap: 1rem;
    }

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

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

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-content {
        padding: 2rem 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .comparison-table {
        font-size: 0.8125rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.75rem 0.5rem;
    }
}

/* ===== Screenshots ===== */
.hero-screenshot {
    width: 100%;
    max-width: 380px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-screenshot:hover {
    transform: scale(1.02);
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.3);
}

.step-screenshot {
    width: 100%;
    border-radius: var(--radius-md);
    margin-top: 1rem;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.step-screenshot:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-md);
}

.gallery-item img {
    width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

/* ===== Lightbox ===== */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 10000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding: 2rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    display: flex;
    opacity: 1;
}

.lightbox-close {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    font-size: 3rem;
    color: var(--white);
    cursor: pointer;
    line-height: 1;
    transition: transform 0.2s ease;
}

.lightbox-close:hover {
    transform: scale(1.2);
}

#lightbox-img {
    max-width: 90vw;
    max-height: 80vh;
    border-radius: var(--radius-lg);
    box-shadow: 0 0 60px rgba(99, 102, 241, 0.3);
    cursor: default;
}

#lightbox-caption {
    color: var(--white);
    margin-top: 1.5rem;
    font-size: 1.1rem;
    text-align: center;
}