/* ============================================
   LEAN ASSETS - Modern Design System
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --color-black: #0F0F10;
    --color-black-soft: #18181B;
    --color-card-dark: #1E1E22;
    --color-green: #4ADE80;
    --color-green-dim: rgba(74, 222, 128, 0.15);
    --color-green-glow: rgba(74, 222, 128, 0.25);
    --color-bg-page: #F4F5F7;
    --color-bg-card: #FFFFFF;
    --color-text-body: #52525B;
    --color-text-heading: #09090B;
    --color-text-muted: #71717A;
    --color-text-light: #A1A1AA;
    --color-border: #E4E4E7;
    --color-border-dark: #2A2A2E;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
    --shadow-green: 0 4px 24px rgba(74, 222, 128, 0.2);

    --container-width: 1200px;
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', sans-serif;
    color: var(--color-text-body);
    background-color: var(--color-bg-page);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-heading);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 16px;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p { margin-bottom: 20px; font-size: 1.1rem; }

a { color: var(--color-green); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: #22c55e; }

ul, ol { margin-bottom: 24px; padding-left: 24px; }
li { margin-bottom: 8px; }

main img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 32px auto;
    border-radius: var(--radius-lg);
}

/* --- Layout --- */
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.text-green { color: var(--color-green); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* --- Navbar --- */
.navbar {
    background: var(--color-black);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--color-border-dark);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a.btn-primary {
    color: #fff;
}

.nav-links a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-green);
    transition: width var(--transition-base);
}

.nav-links a:not(.btn):hover { color: white; }
.nav-links a:not(.btn):hover::after { width: 100%; }

/* Mobile menu toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: white;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: white;
    margin: 5px 0;
    transition: var(--transition-base);
    border-radius: 2px;
}

/* --- Logo --- */
.logo {
    font-weight: 200;
    letter-spacing: 0.03em;
    font-size: 1.6rem;
    text-decoration: none;
    display: inline-block;
    line-height: 1;
    color: white;
}

.logo > span {
    font-weight: 700;
    letter-spacing: 0.01em;
}

.navbar .logo > span,
footer .logo > span {
    color: var(--color-green);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--color-green);
    color: #fff;
    box-shadow: var(--shadow-green);
}
.btn-primary:hover {
    background: #22c55e;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(74, 222, 128, 0.3);
}

.btn-secondary {
    background: rgba(255,255,255,0.08);
    color: white;
    border: 1px solid rgba(255,255,255,0.12);
}
.btn-secondary:hover {
    background: rgba(255,255,255,0.14);
    color: white;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-green);
    border: 1.5px solid var(--color-green);
}
.btn-outline:hover {
    background: var(--color-green-dim);
    transform: translateY(-2px);
}

.btn-text {
    color: var(--color-green);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.95rem;
    transition: gap var(--transition-base);
}
.btn-text:hover { gap: 10px; color: #22c55e; }

.btn-lg { padding: 16px 32px; font-size: 1rem; }

/* --- Sections --- */
.section-hero {
    background: var(--color-black);
    color: white;
    padding: 100px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.section-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--color-green-glow) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.4;
}

.section-hero h1 {
    color: white;
    position: relative;
    z-index: 1;
}

.section-hero p {
    position: relative;
    z-index: 1;
}

.section-white { background-color: white; padding: 100px 0; }
.section-grey { background-color: var(--color-bg-page); padding: 100px 0; }
.section-dark { background-color: var(--color-black); color: white; padding: 100px 0; }
.section-dark h2,
.section-dark h3,
.section-dark h4 { color: white; }

/* --- Cards --- */
.card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all var(--transition-slow);
    height: 100%;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-green);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.card:hover::before { transform: scaleX(1); }

.card-icon {
    color: var(--color-green);
    margin-bottom: 20px;
    width: 36px;
    height: 36px;
    padding: 8px;
    background: var(--color-green-dim);
    border-radius: var(--radius-sm);
}

/* --- Stat Cards --- */
.stat-card {
    background: var(--color-card-dark);
    padding: 36px 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--color-border-dark);
    transition: all var(--transition-base);
}

.stat-card:hover {
    border-color: var(--color-green);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-green);
    display: block;
    margin-bottom: 8px;
    letter-spacing: -0.03em;
}

.stat-label {
    color: var(--color-text-light);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* --- Result Cards --- */
.result-card {
    background: var(--color-card-dark);
    color: white;
    padding: 36px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-dark);
    transition: all var(--transition-base);
}

.result-card:hover {
    border-color: rgba(74, 222, 128, 0.3);
    transform: translateY(-4px);
}

.result-card h3 { color: white; margin-bottom: 4px; }

.result-stats { list-style: none; padding: 0; }
.result-stats li {
    margin-bottom: 10px;
    display: flex;
    gap: 10px;
    font-size: 0.95rem;
    color: #D4D4D8;
}

/* --- Testimonial Cards --- */
.testimonial-card {
    background: #FAFAFA;
    padding: 36px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
}

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

.quote-icon {
    color: var(--color-green);
    margin-bottom: 16px;
    width: 28px;
    height: 28px;
    opacity: 0.5;
}

.testimonial-img {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-green-dim);
}

.testimonial-author {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 24px;
}

.testimonial-author strong {
    display: block;
    font-size: 0.9rem;
    color: var(--color-text-heading);
}

.testimonial-author span {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* --- Check Lists --- */
.check-list { list-style: none; padding: 0; }
.check-list li {
    display: flex;
    gap: 12px;
    margin-bottom: 14px;
    font-size: 1.05rem;
    align-items: flex-start;
}
.check-list li i {
    flex-shrink: 0;
    margin-top: 4px;
}
.check-list.positive i { color: var(--color-green); }
.check-list.negative i { color: #EF4444; }

/* --- Process Steps --- */
.process-icon {
    width: 52px;
    height: 52px;
    background: var(--color-card-dark);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-green);
    margin-bottom: 20px;
    border: 1px solid var(--color-border-dark);
    transition: all var(--transition-base);
}

.process-step:hover .process-icon {
    background: var(--color-green-dim);
    border-color: var(--color-green);
}

/* --- Pricing Card --- */
.pricing-card {
    background: var(--color-card-dark);
    color: white;
    padding: 64px;
    border-radius: var(--radius-xl);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    border: 1px solid var(--color-border-dark);
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-green), transparent);
}

/* --- FAQ --- */
.faq-item {
    background: white;
    padding: 28px;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--color-green);
    box-shadow: var(--shadow-sm);
}

.faq-item h4 { margin-bottom: 8px; font-size: 1.05rem; }
.faq-item p { margin-bottom: 0; font-size: 1rem; color: var(--color-text-body); }

/* --- Logo Carousel --- */
@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.logo-carousel {
    overflow: hidden;
    position: relative;
    width: 100%;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.logo-carousel-track {
    display: flex;
    width: calc(200px * 14);
    animation: scroll 35s linear infinite;
}

.logo-carousel-item {
    width: 200px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
}

.logo-carousel-item img {
    height: 50px;
    max-width: 140px;
    filter: grayscale(100%);
    opacity: 0.5;
    transition: all var(--transition-base);
}

.logo-carousel-item img:hover {
    filter: grayscale(0%);
    opacity: 1;
}

.logo-carousel-item.invert-logo img {
    filter: invert(1) grayscale(100%);
}

.logo-carousel-item.invert-logo img:hover {
    filter: invert(1) grayscale(100%);
    opacity: 1;
}

/* --- Metrics Explanations --- */
.metrics-explanations {
    margin-top: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-align: left;
    border-top: 1px solid var(--color-border-dark);
    padding-top: 30px;
}

.metrics-explanations p {
    color: var(--color-text-light);
    font-size: 0.8rem;
    margin-bottom: 10px;
}

/* --- Footer --- */
footer {
    background: var(--color-black);
    color: var(--color-text-muted);
    padding: 80px 0 40px;
    border-top: 1px solid var(--color-border-dark);
}

footer a { color: var(--color-text-light); text-decoration: none; }
footer a:hover { color: var(--color-green); }

footer .logo { color: white; }

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

.footer-links { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 0.9rem; }

.footer-bottom {
    margin-top: 60px;
    font-size: 0.8rem;
    border-top: 1px solid var(--color-border-dark);
    padding-top: 24px;
    color: var(--color-text-muted);
}

/* --- Scroll Animations --- */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.3s; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.35s; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 0.4s; }

.stagger-children.visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* --- CTA Section --- */
.cta-section {
    text-align: center;
    border-top: 1px solid var(--color-border);
    padding: 80px 0;
    background: white;
}

.cta-section h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-bottom: 16px;
}

.cta-section p {
    color: var(--color-text-body);
    max-width: 600px;
    margin: 0 auto 28px;
}

/* --- Fit Section --- */
.fit-card {
    background: var(--color-bg-page);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

/* --- Hero Buttons --- */
.hero-buttons {
    gap: 16px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

/* --- Trusted By --- */
.trusted-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 24px;
    text-align: center;
}

/* --- Badge --- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--color-green-dim);
    color: var(--color-green);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }

    .section-hero { padding: 60px 0 50px; }
    .section-white, .section-grey, .section-dark { padding: 60px 0; }

    .nav-links { 
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-black);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border-dark);
    }

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

    .nav-links a:not(.btn)::after { display: none; }

    .nav-toggle { display: block; }

    .pricing-card { padding: 40px 24px; }

    .stat-number { font-size: 2rem; }

    .hero-buttons { flex-direction: column; align-items: center; }
    .hero-buttons .btn { width: 100%; max-width: 300px; }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

/* --- Post Content (Blog) --- */
.post-content h2 {
    margin-top: 48px;
    margin-bottom: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.post-content h3 {
    margin-top: 36px;
    margin-bottom: 12px;
}

.post-content p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text-body);
}

.post-content strong {
    color: var(--color-text-heading);
}

.post-content ul, .post-content ol {
    margin-bottom: 24px;
    padding-left: 24px;
}

.post-content li {
    margin-bottom: 8px;
    line-height: 1.7;
    font-size: 1.05rem;
}

.post-content blockquote {
    border-left: 3px solid var(--color-green);
    padding: 16px 24px;
    margin: 24px 0;
    background: var(--color-bg-page);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--color-text-body);
}

.post-content code {
    background: var(--color-bg-page);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

.post-content a {
    color: var(--color-green);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.post-content a:hover {
    color: #22c55e;
}

/* --- Fix: Buttons inside post content should keep their own styles --- */
.post-content .btn {
    color: #fff;
    text-decoration: none;
}

.post-content .btn:hover {
    color: #fff;
    text-decoration: none;
}