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

:root {
    --bg: #ffffff;
    --bg-alt: #f5f5f7;
    --border-subtle: #e5e5ea;
    --text-main: #111827;
    --text-muted: #6b7280;
    --accent: #2563eb;
    --accent-soft: #eff6ff;
    --accent-dark: #1d4ed8;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
}

html {
    scroll-behavior: smooth;
}

/* Navigation */

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: white;
    /* border-bottom: 1px solid var(--border); */
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

nav .logo {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.04em;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.75rem;
    align-items: center;
}

nav a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

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

.nav-cta {
    padding: 0.5rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-weight: 500;
}

/* Hero */

.hero {
    padding: 120px 2rem 72px;
}

.hero-content {
    max-width: 720px;
    margin: 0 auto;
    text-align: left;
}

.hero h1 {
    font-size: 2.6rem;
    letter-spacing: -0.04em;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 1.75rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.btn {
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 0.8rem 1.6rem;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
    background: var(--accent);
    color: #ffffff;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.18);
}

.btn-primary:hover {
    background: var(--accent-dark);
    box-shadow: 0 14px 40px rgba(37, 99, 235, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--text-main);
    border-color: var(--border-subtle);
}

.btn-secondary:hover {
    border-color: var(--text-muted);
}

.hero-disclaimer {
    font-size: 0.8rem;
    color: var(--text-muted);
    max-width: 520px;
}

/* Sections */

section {
    padding: 72px 1.5rem;
    max-width: 960px;
    margin: 0 auto;
}

h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 0.98rem;
    margin-bottom: 2.5rem;
}

/* Problem / Solution */

.problem-solution {
    background: radial-gradient(circle at top left, #eff6ff 0, #ffffff 55%);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.ps-container {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 3rem;
    align-items: flex-start;
}

.ps-before-after {
    background: #ffffff;
    border-radius: 10px;
    padding: 1.2rem 1.3rem;
    border: 1px solid var(--border-subtle);
    font-size: 0.95rem;
    margin-bottom: 0.9rem;
}

.ps-after {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.ps-note {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.ps-image {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
    padding: 1.25rem 1.4rem;
}

.ps-image-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.ps-image-columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    font-size: 0.9rem;
}

.ps-col {
    border-radius: 10px;
    padding: 0.9rem;
    background: #f9fafb;
}

.ps-col-after {
    background: var(--accent-soft);
}

.ps-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.ps-col ul {
    list-style: none;
}

.ps-col li::before {
    content: "• ";
    color: var(--text-muted);
}

/* Features */

.features {
    background: var(--bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.feature-card {
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
    padding: 1.6rem 1.5rem;
    background: #ffffff;
    transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.feature-card:hover {
    box-shadow: 0 14px 40px rgba(15, 23, 42, 0.06);
    transform: translateY(-2px);
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    font-size: 0.94rem;
    color: var(--text-muted);
}

/* How It Works */

.how-it-works {
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    background: radial-gradient(circle at top left, #eff6ff 0, #ffffff 55%);
}

.workflow-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
    margin-top: 2.5rem;
}

.workflow-step {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
    padding: 1.3rem 1.2rem;
    font-size: 0.9rem;
}

.step-number {
    width: 26px;
    height: 26px;
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    margin-bottom: 0.7rem;
    color: var(--text-muted);
}

.workflow-step h4 {
    font-size: 0.98rem;
    margin-bottom: 0.35rem;
}

.workflow-step p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* FAQ */

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.75rem;
    margin-top: 2.25rem;
}

.faq-item {
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
    padding: 1.4rem 1.3rem;
    background: #ffffff;
}

.faq-question {
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.98rem;
}

.faq-answer {
    color: var(--text-muted);
    font-size: 0.92rem;
}

/* Contact */

.contact {
    border-top: 1px solid var(--border-subtle);
    background: radial-gradient(circle at top left, #eff6ff 0, #ffffff 55%);
}

.contact-form {
    max-width: 520px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.3rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    font-family: inherit;
    font-size: 0.95rem;
    padding: 0.7rem 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    background: #ffffff;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.25);
}

.submit-btn {
    width: 100%;
    border-radius: 10px;
    border: none;
    padding: 0.9rem;
    font-size: 0.96rem;
    font-weight: 500;
    background: var(--accent);
    color: #ffffff;
    cursor: pointer;
    transition: background 0.15s ease, box-shadow 0.15s ease;
}

.submit-btn:hover {
    background: var(--accent-dark);
    box-shadow: 0 12px 34px rgba(37, 99, 235, 0.18);
}

/* Footer */

footer {
    border-top: 1px solid var(--border-subtle);
    padding: 2.5rem 1.5rem 2rem;
    background: #fafafa;
}

.footer-content {
    max-width: 960px;
    margin: 0 auto 1.5rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.footer-col h4 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.footer-col ul {
    list-style: none;
    font-size: 0.9rem;
}

.footer-col li {
    margin-bottom: 0.25rem;
}

.footer-col a {
    text-decoration: none;
    color: var(--text-muted);
}

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

.footer-bottom {
    max-width: 960px;
    margin: 0 auto;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-subtle);
    padding-top: 1rem;
}

/* Responsive */

@media (max-width: 900px) {
    nav ul {
        display: none;
    }

    .ps-container {
        grid-template-columns: minmax(0, 1fr);
    }

    .features-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .workflow-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .faq-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero {
        padding-top: 96px;
    }
}

@media (max-width: 640px) {
    section {
        padding-inline: 1.1rem;
    }

    .hero {
        padding-inline: 1.1rem;
    }

    .workflow-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .footer-content {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero h1 {
        font-size: 2.1rem;
    }
}