:root {
    --primary: #0e76fd;
    --dark-bg: #0a0e17;
    --card-bg: #141b29;
    --text: #e6e9f0;
    --text-secondary: #8b95a8;
    --border: #252d3c;
    --success: #16a34a;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

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

a:hover {
    color: var(--primary);
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

p {
    margin-bottom: 1rem;
}

.section-intro {
    font-size: 1.1rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
}

.subheading {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Buttons & Forms */
.btn {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    color: white;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

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

input {
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border);
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text);
    font-size: 1rem;
    width: 100%;
    transition: var(--transition);
}

input:focus {
    outline: none;
    border-color: var(--primary);
    background-color: rgba(255, 255, 255, 0.1);
}

input::placeholder {
    color: var(--text-secondary);
}

input.error {
    border-color: #e53e3e;
}

.error-message {
    color: #e53e3e;
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.success-message {
    display: flex;
    align-items: center;
    gap: 1rem;
    background-color: rgba(22, 163, 74, 0.1);
    border: 1px solid var(--success);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    margin: 1rem 0;
    color: var(--success);
}

.success-message svg {
    flex-shrink: 0;
    stroke: var(--success);
}

.success-message p {
    margin: 0;
}

.cta-form {
    margin: 2rem 0;
}

.cta-form form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 400px;
}

.cta-form.wide form {
    max-width: 500px;
    margin: 0 auto;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.nav-links {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--dark-bg);
    padding: 2rem;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    transform: translateY(-120%);
    transition: transform 0.3s ease-in-out;
}

.nav-links.active {
    transform: translateY(0);
    display: flex;
}

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

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: white;
    border-radius: 3px;
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Hero Section */
#hero {
    padding: 120px 0 60px;
    text-align: center;
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.hero-image {
    margin-top: 3rem;
}

.image-placeholder {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
}

.image-placeholder.large {
    height: 300px;
}

.mockup-text {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Features Section */
#features {
    padding: 60px 0;
    background-color: rgba(14, 118, 253, 0.03);
}

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

.feature-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(14, 118, 253, 0.3);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* How It Works Section */
#how-it-works {
    padding: 60px 0;
}

.steps {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    max-width: 300px;
    margin: 0 auto;
    position: relative;
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.5rem;
    margin: 0 auto 1.5rem;
}

/* Screenshots Section */
#screenshots {
    padding: 60px 0;
    background-color: rgba(14, 118, 253, 0.03);
}

.screenshot-carousel {
    margin-top: 2rem;
}

/* Testimonials Section */
#testimonials {
    padding: 60px 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

.testimonial-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    border: 1px solid var(--border);
}

.testimonial-card.highlight {
    border-color: var(--primary);
    background-color: rgba(14, 118, 253, 0.1);
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: 1.5rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #2f3c52;
}

.author-avatar.special {
    background-color: var(--primary);
}

.author-info h4 {
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.author-info p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: normal;
}

/* CTA Section */
#cta {
    padding: 60px 0;
    text-align: center;
    background-color: rgba(14, 118, 253, 0.05);
}

/* Footer */
footer {
    padding: 60px 0 30px;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-logo p {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

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

.link-group h4 {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.link-group a {
    display: block;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

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

.social-links a {
    color: var(--text-secondary);
}

.copyright {
    margin-top: 3rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Media Queries */
@media (min-width: 768px) {
    h1 {
        font-size: 3.5rem;
    }
    
    h2 {
        font-size: 2.5rem;
    }
    
    .cta-form form {
        flex-direction: row;
    }
    
    .cta-form form input {
        flex: 1;
    }
    
    .nav-links {
        display: flex;
        flex-direction: row;
        position: static;
        background-color: transparent;
        padding: 0;
        box-shadow: none;
        transform: none;
        gap: 2rem;
        align-items: center;
    }
    
    .menu-toggle {
        display: none;
    }
    
    #hero {
        text-align: left;
        padding: 150px 0 80px;
    }
    
    .hero-content {
        margin: 0;
    }
    
    .hero-image {
        margin-top: 0;
    }
    
    #hero .container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
        align-items: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .footer-links {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.loading-message {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border);
}

.loading-message p {
    margin: 0;
    position: relative;
    padding-left: 30px;
}

.loading-message p::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: translateY(-50%) rotate(360deg);
    }
}

.submitting form {
    opacity: 0.7;
    pointer-events: none;
}