/* === AI-PBN Stylesheet ===
   Color Palette: "Deep Blue and Tan"
   Primary Dark:  #12343b
   Primary:       #2d545e
   Accent:        #c89666
   Accent Light:  #e1b382
*/

:root {
    --color-dark: #12343b;
    --color-primary: #2d545e;
    --color-accent: #c89666;
    --color-accent-light: #e1b382;
    --color-bg: #f8f6f3;
    --color-white: #ffffff;
    --color-text: #1a2a30;
    --color-text-light: #5a6f76;
    --color-border: #ddd5cc;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(18, 52, 59, 0.08);
    --shadow-lg: 0 12px 48px rgba(18, 52, 59, 0.12);
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(248, 246, 243, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(221, 213, 204, 0.5);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(18, 52, 59, 0.06);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo img {
    display: block;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-family: var(--font);
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    font-size: 0.95rem;
    padding: 10px 24px;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
}

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

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

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

.btn-accent:hover {
    background: var(--color-accent-light);
    color: var(--color-dark);
}

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

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

/* === Hero === */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary) 60%, #3a6b77 100%);
    color: var(--color-white);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(225, 179, 130, 0.15);
    border: 1px solid rgba(225, 179, 130, 0.3);
    color: var(--color-accent-light);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 520px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-cta .btn-outline {
    border-color: rgba(255, 255, 255, 0.4);
    color: var(--color-white);
}

.hero-cta .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
}

.hero-stats {
    display: flex;
    gap: 40px;
}

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

.stat strong {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-accent-light);
}

.stat span {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

/* Hero Graphic - Network Visualization */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-graphic {
    position: relative;
    width: 400px;
    height: 400px;
}

.node {
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--color-accent-light);
    border-radius: 50%;
    animation: pulse 3s ease-in-out infinite;
}

.node-1 { top: 20%; left: 10%; animation-delay: 0s; }
.node-2 { top: 5%; right: 25%; animation-delay: 0.5s; }
.node-3 { bottom: 30%; right: 5%; animation-delay: 1s; }
.node-4 { bottom: 10%; left: 20%; animation-delay: 1.5s; }
.node-5 { top: 40%; right: 30%; animation-delay: 0.8s; width: 12px; height: 12px; background: var(--color-accent); }

.center-node {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 72px;
    height: 72px;
    background: rgba(225, 179, 130, 0.15);
    border: 2px solid rgba(225, 179, 130, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 3s ease-in-out infinite;
}

.line {
    position: absolute;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(225, 179, 130, 0.3), transparent);
    transform-origin: left center;
}

.line-1 { top: 27%; left: 15%; width: 160px; transform: rotate(20deg); }
.line-2 { top: 12%; right: 20%; width: 140px; transform: rotate(130deg); }
.line-3 { bottom: 35%; right: 10%; width: 150px; transform: rotate(-30deg); }
.line-4 { bottom: 15%; left: 25%; width: 130px; transform: rotate(-20deg); }

@keyframes pulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

.center-node {
    animation: pulse 3s ease-in-out infinite;
}

/* === Sections === */
.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 560px;
    margin: 0 auto;
}

/* === Features === */
.features {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 36px 28px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--color-dark), var(--color-primary));
    color: var(--color-accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-dark);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.65;
}

/* === How It Works === */
.how-it-works {
    padding: 100px 0;
    background: var(--color-white);
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
}

.step {
    text-align: center;
    flex: 1;
    max-width: 240px;
    padding: 0 16px;
}

.step-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-accent-light);
    margin-bottom: 16px;
    opacity: 0.5;
}

.step h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 10px;
}

.step p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.step-connector {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-border), var(--color-accent-light), var(--color-border));
    margin-top: 30px;
    flex-shrink: 0;
}

/* === Pricing === */
.pricing {
    padding: 100px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    align-items: stretch;
}

.price-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 40px 32px;
    box-shadow: var(--shadow);
    border: 2px solid transparent;
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

.price-card .btn {
    margin-top: auto;
}

.price-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.price-card.featured {
    border-color: var(--color-accent);
    transform: scale(1.04);
}

.price-card.featured:hover {
    transform: scale(1.04) translateY(-4px);
}

.price-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: var(--color-white);
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
}

.price-header {
    margin-bottom: 20px;
}

.price-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 4px;
}

.price-description {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.price-amount {
    margin-bottom: 28px;
    display: flex;
    align-items: baseline;
    gap: 2px;
}

.currency {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark);
}

.amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-dark);
    line-height: 1;
}

.per {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-left: 4px;
}

.price-features {
    list-style: none;
    margin-bottom: 32px;
}

.price-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 0.95rem;
    color: var(--color-text);
    border-bottom: 1px solid rgba(221, 213, 204, 0.4);
}

.price-features li:last-child {
    border-bottom: none;
}

.price-features svg {
    flex-shrink: 0;
}

/* === Testimonials === */
.testimonials {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary) 100%);
    color: var(--color-white);
}

.testimonials .section-header h2 {
    color: var(--color-white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.testimonial-card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 32px;
    backdrop-filter: blur(8px);
}

.stars {
    color: var(--color-accent-light);
    font-size: 1.1rem;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.testimonial-card p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 20px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(225, 179, 130, 0.2);
    color: var(--color-accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.testimonial-author strong {
    display: block;
    font-size: 0.95rem;
}

.testimonial-author span {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

/* === FAQ === */
.faq {
    padding: 100px 0;
    background: var(--color-white);
}

.faq-list {
    max-width: 740px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    background: none;
    border: none;
    font-family: var(--font);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-dark);
    cursor: pointer;
    text-align: left;
    gap: 16px;
    transition: var(--transition);
}

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

.faq-question svg {
    flex-shrink: 0;
    transition: var(--transition);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: 20px;
}

.faq-answer p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* === Contact === */
.contact {
    padding: 100px 0;
    background: var(--color-bg);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: start;
}

.contact-info h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.contact-info > p {
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 32px;
}

.contact-details {
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 0.95rem;
    color: var(--color-text);
}

.trust-badges {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.contact-form {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 6px;
}

input, select, textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-bg);
    transition: var(--transition);
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(200, 150, 102, 0.15);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

.form-note {
    font-size: 0.8rem;
    color: var(--color-text-light);
    text-align: center;
    margin-top: 12px;
}

/* === Footer === */
.footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-brand p {
    margin-top: 16px;
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 320px;
}

.footer-links h4 {
    color: var(--color-white);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
}

/* === Success Message === */
.form-success {
    display: none;
    text-align: center;
    padding: 40px 20px;
}

.form-success.show {
    display: block;
}

.form-success svg {
    margin-bottom: 16px;
}

.form-success h3 {
    font-size: 1.3rem;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.form-success p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* === Responsive === */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .hero-visual {
        display: none;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
    .features-grid,
    .pricing-grid,
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .price-card.featured {
        transform: scale(1);
    }
    .price-card.featured:hover {
        transform: translateY(-4px);
    }
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow);
    }
    .nav-links.active {
        display: flex;
    }
    .hamburger {
        display: flex;
    }
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    .hero {
        padding: 120px 0 60px;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .hero-stats {
        gap: 24px;
    }
    .hero-cta {
        flex-direction: column;
    }
    .features-grid,
    .pricing-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    .steps {
        flex-direction: column;
        align-items: center;
    }
    .step-connector {
        width: 2px;
        height: 40px;
        margin: 0;
    }
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}