/* 
  ScrollMind Design System - Light Mode
  CRITICAL CONSTRAINT: NO SHADOWS, NO EMOJIS
  Style: Clean, ultra-crisp, high-contrast, modern light aesthetic with sharp minimalist borders
*/
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --accent: #0284c7;
    --accent-hover: #0369a1;
    --accent-dim: rgba(2, 132, 199, 0.08);
    --accent-border: rgba(2, 132, 199, 0.2);
    --emerald: #059669;
    --emerald-dim: rgba(5, 150, 105, 0.1);
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-dim: #64748b;
    --border-subtle: #e2e8f0;
    --border-strong: #cbd5e1;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --max-width: 1200px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    box-shadow: none !important;
    text-shadow: none !important;
    filter: none !important;
}

html {
    scroll-behavior: smooth;
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.6;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header & Navigation */
header.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid var(--border-subtle);
    backdrop-filter: blur(12px);
}

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

.brand-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.brand-logo {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    border: 1px solid var(--border-subtle);
    object-fit: cover;
}

.brand-name {
    color: var(--text-main);
}

.brand-badge {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background-color: var(--accent-dim);
    color: var(--accent);
    padding: 0.2rem 0.55rem;
    border-radius: 9999px;
    border: 1px solid var(--accent-border);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

.nav-link:hover {
    color: var(--text-main);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.75rem 1.4rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    text-align: center;
}

.btn-primary {
    background-color: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    color: #ffffff;
}

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

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

.btn-sm {
    padding: 0.45rem 1rem;
    font-size: 0.85rem;
    border-radius: 6px;
}

/* Hero Section */
.hero {
    padding: 5rem 0 4rem;
    position: relative;
    background-color: var(--bg-primary);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3.5rem;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.pill-announcement {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    align-self: flex-start;
    padding: 0.35rem 0.85rem;
    border-radius: 9999px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
}

.pill-announcement .indicator-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--emerald);
}

.hero-title {
    font-size: 3.25rem;
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-main);
}

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

.hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.6;
    color: var(--text-muted);
    max-width: 540px;
}

.hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    margin-top: 0.5rem;
}

/* Google Play Store Badge Image Links */
.playstore-badge-link {
    display: inline-flex;
    align-items: center;
    line-height: 0;
    transition: transform 0.2s ease, opacity 0.2s ease;
    border-radius: 8px;
}

.playstore-badge-link:hover {
    transform: translateY(-2px);
    opacity: 0.92;
}

.playstore-badge-header {
    height: 38px;
    width: auto;
    display: block;
    border-radius: 6px;
}

.playstore-badge-hero {
    height: 48px;
    width: auto;
    display: block;
    border-radius: 8px;
}

.playstore-badge-cta {
    height: 52px;
    width: auto;
    display: block;
    border-radius: 8px;
}

/* Google Play Store Badge Button Fallback */
.btn-playstore {
    background-color: #0f172a;
    color: #ffffff;
    border: 1px solid #0f172a;
    padding: 0.65rem 1.35rem;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.btn-playstore:hover {
    background-color: #1e293b;
    border-color: #1e293b;
    color: #ffffff;
}

.playstore-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.playstore-text-group {
    display: flex;
    flex-direction: column;
    text-align: left;
    line-height: 1.2;
}

.playstore-small {
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #94a3b8;
}

.playstore-main {
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
}

/* Trust highlights */
.trust-strip {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.trust-icon {
    width: 16px;
    height: 16px;
    color: var(--emerald);
    flex-shrink: 0;
}

/* Hero Preview / Visual */
.hero-visual {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 100%;
    max-width: 320px;
    border-radius: 28px;
    border: 3px solid var(--border-strong);
    background-color: var(--bg-secondary);
    overflow: hidden;
}

.phone-screen {
    width: 100%;
    display: block;
    object-fit: cover;
}

/* Section Styles */
section {
    padding: 5rem 0;
    border-top: 1px solid var(--border-subtle);
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 3.5rem;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    background-color: var(--accent-dim);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    border: 1px solid var(--accent-border);
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-main);
    margin-bottom: 0.75rem;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* Features Section */
#features {
    background-color: var(--bg-secondary);
}

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

.feature-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.feature-card:hover {
    border-color: var(--border-strong);
    background-color: var(--bg-card);
}

.feature-icon-box {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    background-color: var(--accent-dim);
    border: 1px solid var(--accent-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-main);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* How It Works Steps */
#how-it-works {
    background-color: var(--bg-primary);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.step-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 2.25rem 2rem;
    position: relative;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background-color: var(--accent-dim);
    border: 1px solid var(--accent-border);
    color: var(--accent);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1.25rem;
}

.step-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.step-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Privacy Banner / Section */
#privacy {
    background-color: var(--bg-secondary);
}

.privacy-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 3rem;
}

.privacy-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.privacy-title-group h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.privacy-title-group p {
    color: var(--text-muted);
    font-size: 1rem;
}

.privacy-keypoints {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.privacy-item.full-width {
    grid-column: span 2;
}

.privacy-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
}

.privacy-item-icon {
    color: var(--emerald);
    flex-shrink: 0;
    margin-top: 2px;
}

.privacy-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.25rem;
}

.privacy-item p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.privacy-action-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
}

.privacy-meta {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.privacy-meta strong {
    color: var(--text-main);
}

/* FAQ Section */
#faq {
    background-color: var(--bg-primary);
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    max-width: 820px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 1.5rem;
}

.faq-question {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.faq-answer {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
    padding-left: 2rem;
}

/* CTA Section */
.cta-section {
    text-align: center;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    padding: 5rem 0;
}

.cta-box {
    max-width: 680px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.cta-title {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-main);
}

.cta-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
}

/* Footer */
footer.site-footer {
    background-color: var(--bg-secondary);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-subtle);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 2.5rem;
    margin-bottom: 3.5rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 320px;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-main);
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links li a {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: color 0.2s ease;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.contact-item svg {
    color: var(--accent);
    flex-shrink: 0;
}

.contact-item a {
    color: var(--text-main);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.contact-item a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.footer-bottom a {
    color: var(--text-muted);
}

.footer-bottom a:hover {
    color: var(--text-main);
}

/* Responsive */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        align-items: center;
    }

    .pill-announcement {
        align-self: center;
    }

    .hero-subtitle {
        margin: 0 auto;
    }

    .hero-cta-group {
        justify-content: center;
    }

    .trust-strip {
        justify-content: center;
    }

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

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

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

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .nav-links {
        display: none;
    }

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

    .privacy-keypoints {
        grid-template-columns: 1fr;
    }

    .privacy-header {
        flex-direction: column;
    }

    .privacy-card {
        padding: 1.5rem;
    }

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