/* ============================================
   SmartFlow ADHD — Promotional Website Styles
   Apple-inspired light theme, modern aesthetic
   ============================================ */

:root {
    --color-bg: #ffffff;
    --color-bg-elevated: #f5f5f7;
    --color-bg-card: #ffffff;
    --color-bg-card-hover: #f9f9fb;
    --color-text: #4b5563;
    --color-text-secondary: #6e6e73;
    --color-text-tertiary: #86868b;
    --color-accent: #6366f1;
    --color-accent-hover: #4f46e5;
    --color-accent-glow: rgba(99, 102, 241, 0.1);
    --color-green: #22c55e;
    --color-orange: #f59e0b;
    --color-border: rgba(0, 0, 0, 0.08);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --max-width: 1200px;
    --nav-height: 64px;
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    overflow-x: hidden;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---- Navigation ---- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: background var(--transition);
}

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

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-logo span {
    color: var(--color-accent);
}

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

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

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

.nav-cta {
    background: var(--color-accent);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 980px;
    font-weight: 500;
}

.nav-cta:hover {
    background: var(--color-accent-hover) !important;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ---- Hero ---- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-eyebrow {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #4b5563 0%, #6366f1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.6;
    font-weight: 300;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-gradient {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 30% 70%, rgba(34, 197, 94, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 980px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    font-family: var(--font-family);
}

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

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: scale(1.02);
}

.btn-ghost {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.btn-ghost:hover {
    background: var(--color-accent-glow);
    border-color: var(--color-accent);
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.1rem;
}

/* ---- Stats ---- */
.stats {
    padding: 80px 0;
    border-bottom: 1px solid var(--color-border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    background: linear-gradient(135deg, #4b5563 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.stat-label {
    display: block;
    margin-top: 8px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-weight: 400;
}

/* ---- Section Headers ---- */
.section-eyebrow {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    color: #4b5563;
}

.section-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 650px;
    margin: 0 auto;
    line-height: 1.6;
    font-weight: 300;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

/* ---- Features ---- */
.features {
    padding: 120px 0;
    background: var(--color-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 40px 32px;
    transition: all var(--transition);
}

.feature-card:hover {
    background: var(--color-bg-card-hover);
    border-color: rgba(0, 0, 0, 0.12);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

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

/* ---- Feature Showcase ---- */
.feature-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 80px;
}

.feature-showcase.reverse {
    direction: rtl;
}

.feature-showcase.reverse > * {
    direction: ltr;
}

.showcase-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    background: rgba(99, 102, 241, 0.08);
    padding: 6px 14px;
    border-radius: 100px;
    margin-bottom: 16px;
}

.showcase-text h3 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: var(--color-text);
}

.showcase-text p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.showcase-image {
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
}

.showcase-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* ---- Security Section ---- */
.security {
    padding: 120px 0;
    background: var(--color-bg-elevated);
}

.security-architecture {
    margin-bottom: 64px;
}

.arch-diagram {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    color: var(--color-text);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.security-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 40px 32px;
    transition: all var(--transition);
}

.security-card:hover {
    background: var(--color-bg-card-hover);
    border-color: rgba(0, 0, 0, 0.12);
    transform: translateY(-4px);
}

.security-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: 24px;
}

.security-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

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

/* ---- GDPR Block ---- */
.gdpr-block {
    margin-top: 64px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 48px;
}

.gdpr-header {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    margin-bottom: 36px;
}

.gdpr-icon {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    color: var(--color-accent);
}

.gdpr-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.gdpr-intro {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.gdpr-points {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.gdpr-point {
    padding: 20px 24px;
    border-radius: 12px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
}

.gdpr-point strong {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.gdpr-point p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin: 0;
}

/* ---- Collateral Data Section ---- */
.collateral {
    padding: 120px 0;
    background: var(--color-bg-elevated);
}

.collateral-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.collateral-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 40px 32px;
    transition: all var(--transition);
}

.collateral-card:hover {
    background: var(--color-bg-card-hover);
    border-color: rgba(0, 0, 0, 0.12);
    transform: translateY(-4px);
}

.collateral-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: 24px;
}

.collateral-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

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

/* ---- AQAS Section ---- */
.aqas {
    padding: 120px 0;
    background: var(--color-bg-elevated);
}

.aqas-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.aqas-timeline::before {
    content: '';
    position: absolute;
    left: 28px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-green));
    opacity: 0.3;
}

.timeline-item {
    display: flex;
    gap: 32px;
    margin-bottom: 48px;
    position: relative;
}

.timeline-marker {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-bg-card);
    border: 2px solid var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
}

.timeline-number {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-accent);
}

.timeline-content {
    padding-top: 8px;
}

.timeline-badge {
    display: inline-block;
    padding: 3px 12px;
    border-radius: 980px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 12px;
}

.timeline-badge.essential {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-accent);
}

.timeline-badge.recommended {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-orange);
}

.timeline-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.aqas-citation {
    max-width: 800px;
    margin: 48px auto 0;
    padding: 24px 32px;
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    text-align: center;
}

.aqas-citation p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.aqas-citation a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
}

.aqas-citation a:hover {
    text-decoration: underline;
}

/* ---- Workflow ---- */
.workflow {
    padding: 120px 0;
    background: var(--color-bg);
}

.workflow-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.workflow-step {
    text-align: center;
    padding: 40px 24px;
}

.step-icon {
    width: 72px;
    height: 72px;
    color: var(--color-accent);
    margin: 0 auto 24px;
}

.step-icon svg {
    width: 100%;
    height: 100%;
}

.workflow-step h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* ---- CTA Section ---- */
.cta-section {
    padding: 160px 0;
    background: var(--color-bg-elevated);
    text-align: center;
    position: relative;
    overflow: hidden;
}

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

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-content .section-subtitle {
    margin-bottom: 40px;
}

/* ---- Contact ---- */
.contact {
    padding: 120px 0;
    background: var(--color-bg);
}

.contact-form {
    max-width: 640px;
    margin: 0 auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-tertiary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-note {
    margin-top: 16px;
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    text-align: center;
}


/* ---- Footer ---- */
.footer {
    padding: 48px 0 24px;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    margin-top: 6px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

/* ---- Animated SVG Data Flow ---- */
.dataflow {
    padding: 100px 0 120px;
    background: var(--color-bg);
}

.dataflow-visual {
    max-width: 960px;
    margin: 0 auto;
    background: var(--color-bg-card);
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

.dataflow-visual svg {
    width: 100%;
    height: auto;
    color: #4b5563;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

.dataflow-visual svg text {
    fill: #4b5563;
}

.dataflow-visual svg text[fill="white"] {
    fill: #ffffff !important;
}

.dataflow-visual svg text[fill="var(--secondary)"] {
    fill: #6366f1 !important;
}

.dataflow-visual svg circle[opacity="0.08"],
.dataflow-visual svg circle[opacity="0.12"],
.dataflow-visual svg circle[opacity="0.18"],
.dataflow-visual svg circle[opacity="0.24"],
.dataflow-visual svg circle[opacity="0.3"] {
    opacity: 0.4 !important;
}

.dataflow-visual svg circle[opacity="0.04"] {
    opacity: 0.3 !important;
}

.dataflow-visual svg path[opacity="0.04"],
.dataflow-visual svg path[opacity="0.06"] {
    opacity: 0.25 !important;
}

.dataflow-visual svg ellipse[opacity="0.04"] {
    opacity: 0.2 !important;
}

.dataflow-visual svg text[opacity="0.35"],
.dataflow-visual svg text[opacity="0.4"],
.dataflow-visual svg text[opacity="0.5"],
.dataflow-visual svg text[opacity="0.7"] {
    opacity: 0.9 !important;
}

.dataflow-visual svg text[opacity="0.25"] {
    opacity: 0.6 !important;
}

/* ---- Animations ---- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .feature-showcase {
        gap: 32px;
    }
    .collateral-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .security-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .workflow-steps {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
    }
    .nav-links.active {
        display: flex;
    }
    .nav-toggle {
        display: flex;
    }
    .hero {
        padding: 100px 24px 60px;
        min-height: auto;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    .feature-showcase {
        grid-template-columns: 1fr;
        gap: 24px;
        margin-bottom: 48px;
    }
    .feature-showcase.reverse {
        direction: ltr;
    }
    .showcase-text h3 {
        font-size: 1.4rem;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .collateral-grid {
        grid-template-columns: 1fr;
    }
    .security-grid {
        grid-template-columns: 1fr;
    }
    .arch-diagram {
        overflow-x: auto;
    }
    .gdpr-block {
        padding: 32px 24px;
    }
    .gdpr-header {
        flex-direction: column;
        gap: 16px;
    }
    .gdpr-points {
        grid-template-columns: 1fr;
    }
    .workflow-steps {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .footer-inner {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    .section-title {
        font-size: 2rem;
    }
    .stat-number {
        font-size: 2.5rem;
    }
    .aqas-timeline::before {
        left: 28px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .hero-title {
        font-size: 2.5rem;
    }
}