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

:root {
    --primary-color: #0d9488;
    --primary-hover: #0f766e;
    --primary-glow: rgba(13, 148, 136, 0.25);
    --text-primary: #1c1917;
    --text-secondary: #57534e;
    --bg-light: #f0fdfa;
    --bg-warm: #fafaf9;
    --border-color: #d6d3d1;
    --success-color: #059669;
    --error-color: #dc2626;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.5;
    color: var(--text-primary);
    background: linear-gradient(160deg, #f0fdfa 0%, #fafaf9 50%, #e7e5e4 100%);
    min-height: 100vh;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 720px;
    width: 100%;
    margin: 0 auto;
    background: #fffbff;
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(13, 148, 136, 0.12), 0 4px 14px rgba(0, 0, 0, 0.06);
    overflow: hidden;
}

/* Header */
.header {
    background: var(--primary-color);
    color: white;
    padding: 1.25rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 36px;
    width: auto;
    display: block;
}

.nav {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    opacity: 0.95;
    transition: opacity 0.2s;
}

.nav-link:hover {
    opacity: 1;
    text-decoration: underline;
}

/* Main */
main {
    padding: 2.5rem 2rem 2rem;
}

/* Hero */
.hero {
    text-align: center;
    margin-bottom: 3rem;
}

.headline {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.25;
}

.tagline {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 auto 1rem;
}

.urgency-line {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1.25rem;
}

.cta-btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    background: var(--primary-color);
    border: none;
    border-radius: 10px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
    margin-bottom: 1rem;
}

.cta-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(13, 148, 136, 0.4);
}

.trust-hint {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Sections */
.section {
    margin-bottom: 3rem;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.section-text {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* Problem / Solution */
.problem-solution .section-title:not(:first-child) {
    margin-top: 1.5rem;
}

.feature-list,
.benefits-list {
    list-style: none;
    margin-top: 1rem;
}

.feature-list li,
.benefits-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.feature-list li::before,
.benefits-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* How It Works */
.steps-list {
    margin-bottom: 2rem;
    padding-left: 1.25rem;
}

.steps-list li {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

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

.screenshot-card {
    text-align: center;
}

.screenshot-img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.screenshot-caption {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Pilot Benefits */
.pilot-benefits .section-text {
    margin-bottom: 0.5rem;
}

/* FAQ */
.faq-section {
    margin-bottom: 2.5rem;
}

.faq {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.faq-item {
    border: 2px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    background: var(--bg-light);
    border: none;
    cursor: pointer;
    font-family: inherit;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s;
}

.faq-question::after {
    content: "+";
    font-size: 1.25rem;
    color: var(--primary-color);
    flex-shrink: 0;
    margin-left: 0.5rem;
}

.faq-question[aria-expanded="true"]::after {
    content: "−";
}

.faq-question:hover {
    background: rgba(13, 148, 136, 0.08);
}

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

.faq-item:has(.faq-question[aria-expanded="true"]) .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 1rem 1.25rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

/* Signup Section */
.signup-section {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 2px solid rgba(13, 148, 136, 0.2);
    box-shadow: 0 4px 20px var(--primary-glow);
}

.signup-urgency {
    text-align: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.signup-intro {
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.signup-form {
    width: 100%;
}

.form-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.form-group:last-of-type {
    margin-bottom: 0;
}

.form-group-btn {
    margin-top: 0.25rem;
}

.form-group input {
    flex: 1;
    min-width: 0;
    padding: 1rem 1.25rem;
    font-size: 1.05rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    transition: all 0.2s;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--primary-glow);
}

.form-group input::placeholder {
    color: #78716c;
}

.submit-btn {
    width: 100%;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    background: var(--primary-color);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.submit-btn:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(13, 148, 136, 0.4);
}

.submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    animation: slideDown 0.3s ease-out;
}

.message.success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid var(--success-color);
}

.message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid var(--error-color);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer */
footer {
    background: var(--bg-light);
    padding: 1.25rem 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
}

footer p:first-child {
    margin-bottom: 0.25rem;
}

/* Responsive */
@media (max-width: 600px) {
    body {
        padding: 12px;
    }

    .header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .logo-link {
        justify-content: center;
    }

    .nav {
        justify-content: center;
    }

    main {
        padding: 2rem 1.5rem;
    }

    .headline {
        font-size: 1.5rem;
    }

    .tagline {
        font-size: 0.95rem;
    }

    .screenshots {
        grid-template-columns: 1fr;
    }

    .signup-section {
        padding: 1.75rem 1.25rem;
    }

    .form-group {
        flex-direction: column;
    }

    .form-group input {
        width: 100%;
    }
}