/* ============================================
   RealmAI Marketing Website — Design System
   Inspired by maveai.co premium aesthetic
   ============================================ */

/* ---- CSS Custom Properties ---- */
:root {
    /* Colors */
    --bg-warm: #ECECE7;
    --bg-warm-alt: #f4f3ef;
    --bg-dark: #0a0a0a;
    --bg-dark-card: #1a1a1a;
    --text-primary: #1a1a1a;
    --text-secondary: #6b6b6b;
    --text-light: #f5f5f5;
    --text-muted-light: #9a9a9a;
    --accent-blue: #4a7dff;
    --accent-glow: rgba(74, 125, 255, 0.15);
    --accent-glow-strong: rgba(74, 125, 255, 0.3);
    --border-light: rgba(0, 0, 0, 0.06);
    --border-dark: rgba(255, 255, 255, 0.08);
    --white: #ffffff;
    --shadow-soft: 0 2px 20px rgba(0, 0, 0, 0.06);
    --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 40px rgba(0, 0, 0, 0.12);

    /* Typography */
    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --section-pad: 120px;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

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

/* ---- Typography ---- */
.serif {
    font-family: var(--font-serif);
}

.section-title {
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.section-title.light {
    color: var(--text-light);
}

.section-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 640px;
    margin: 0 auto 40px;
}

.section-eyebrow {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-blue);
    margin-bottom: 16px;
}

.section-eyebrow.light {
    color: var(--accent-blue);
}

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

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

.delay-1 {
    transition-delay: 0.15s;
}

.delay-2 {
    transition-delay: 0.3s;
}

.delay-3 {
    transition-delay: 0.45s;
}

.delay-4 {
    transition-delay: 0.6s;
}

/* ---- Buttons ---- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 36px;
    background: var(--bg-dark);
    color: var(--text-light);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    border-radius: 100px;
    border: none;
    cursor: pointer;
    transition: var(--transition-medium);
    letter-spacing: 0.01em;
}

.btn-primary:hover {
    background: #2a2a2a;
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
}

.btn-primary.large {
    padding: 20px 48px;
    font-size: 1.1rem;
}

/* ================================================
   SECTION 1: NAVIGATION
   ================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition-medium);
}

.navbar.scrolled {
    box-shadow: var(--shadow-soft);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    object-fit: cover;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-secondary);
}

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

.nav-cta {
    padding: 10px 24px;
    background: var(--bg-dark);
    color: var(--text-light);
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
}

.nav-cta:hover {
    background: #2a2a2a;
    transform: translateY(-1px);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ================================================
   SECTION 2: HERO
   ================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-warm);
    padding: 140px 24px 80px;
    overflow: hidden;
    text-align: center;
}

.hero-glow {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 900px;
    background: radial-gradient(circle at center,
            var(--accent-glow-strong) 0%,
            var(--accent-glow) 30%,
            transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.8rem, 6.5vw, 4.8rem);
    font-weight: 500;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-title em {
    font-style: italic;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 640px;
    margin: 0 auto 40px;
}

.hero-mockup {
    position: relative;
    z-index: 1;
    margin-top: 60px;
    max-width: 900px;
    width: 100%;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.12);
}

.hero-mockup-img {
    width: 100%;
    border-radius: 16px;
}

.hero-partners {
    position: relative;
    z-index: 1;
    margin-top: 80px;
    text-align: center;
}

.partners-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    letter-spacing: 0.02em;
}

.partner-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.partner-logo-text {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    opacity: 0.7;
    letter-spacing: -0.01em;
}

.partner-divider {
    font-size: 1.2rem;
    color: var(--text-secondary);
    opacity: 0.5;
}

/* ================================================
   SECTION 3: CONCEPT
   ================================================ */
.concept {
    padding: var(--section-pad) 0;
    text-align: center;
    background: var(--white);
}

.concept-badge {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 100px;
    background: var(--accent-glow);
    color: var(--accent-blue);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.concept-text {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto 50px;
}

.agent-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px 32px;
    background: var(--bg-warm);
    border-radius: 16px;
    min-width: 140px;
    transition: var(--transition-medium);
}

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

.flow-icon {
    font-size: 2rem;
}

.flow-label {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* ================================================
   SECTION 4: CTA BANNER
   ================================================ */
.cta-banner {
    padding: 60px 0;
    text-align: center;
    background: var(--bg-warm-alt);
}

.cta-banner-btn {
    display: inline-block;
    padding: 18px 48px;
    background: var(--accent-blue);
    color: var(--white);
    border-radius: 100px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: var(--transition-medium);
    box-shadow: 0 4px 20px rgba(74, 125, 255, 0.3);
}

.cta-banner-btn:hover {
    background: #3a6de8;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(74, 125, 255, 0.4);
}

.cta-banner-sub {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 12px;
}

/* ================================================
   SECTION 5: FOR REALTORS — SPLIT LAYOUT
   ================================================ */
.realtors-section {
    padding: var(--section-pad) 0;
    background: var(--white);
}

.realtors-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.realtors-left {
    text-align: left;
}

.realtors-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 520px;
    margin-bottom: 48px;
}

/* ---- Accordion ---- */
.realtors-accordion {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.accordion-item {
    border-bottom: 1px solid var(--border-light);
    overflow: hidden;
    transition: var(--transition-medium);
}

.accordion-item:first-child {
    border-top: 1px solid var(--border-light);
}

.accordion-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 0;
    cursor: pointer;
    transition: var(--transition-fast);
}

.accordion-header:hover {
    opacity: 0.85;
}

.accordion-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--bg-warm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    transition: var(--transition-medium);
}

.accordion-item.active .accordion-icon {
    background: var(--accent-glow);
}

.accordion-bar {
    width: 3px;
    height: 24px;
    border-radius: 100px;
    background: #ddd;
    flex-shrink: 0;
    transition: var(--transition-medium);
}

.accordion-item.active .accordion-bar {
    background: var(--accent-blue);
    box-shadow: 0 0 8px rgba(74, 125, 255, 0.4);
}

.accordion-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.accordion-item:not(.active) .accordion-title {
    color: var(--text-secondary);
}

.accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 0 0 59px;
}

.accordion-item.active .accordion-body {
    max-height: 200px;
    padding: 0 0 20px 59px;
}

.accordion-body p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ---- Phone Mockup ---- */
.realtors-right {
    position: sticky;
    top: 120px;
    text-align: center;
}

.phone-mockup-wrapper {
    max-width: 440px;
    margin: 0 auto;
    border-radius: 28px;
    overflow: hidden;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.15), 0 8px 24px rgba(0, 0, 0, 0.08);
}

.phone-mockup-img {
    width: 100%;
    display: block;
    transition: opacity 0.3s ease;
}

.phone-caption {
    margin-top: 24px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.01em;
}


/* ================================================
   SECTION 6: HOW IT WORKS
   ================================================ */
.how-it-works {
    padding: var(--section-pad) 0;
    background: var(--bg-warm);
    text-align: center;
}

.steps-timeline {
    max-width: 600px;
    margin: 60px auto 0;
    text-align: left;
}

.step-item {
    display: flex;
    gap: 24px;
    margin-bottom: 0;
}

.step-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
    width: 40px;
}

.step-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #ccc;
    border: 3px solid var(--bg-warm);
    box-shadow: 0 0 0 2px #ccc;
    flex-shrink: 0;
    transition: var(--transition-medium);
}

.step-indicator.active .step-dot {
    background: var(--accent-blue);
    box-shadow: 0 0 0 2px var(--accent-blue), 0 0 12px rgba(74, 125, 255, 0.4);
}

.step-line {
    width: 2px;
    flex-grow: 1;
    background: #ddd;
    min-height: 40px;
}

.step-content {
    padding-bottom: 40px;
}

.step-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.step-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ================================================
   SECTION 7: FOR BROKERAGES
   ================================================ */
.brokerages-section {
    padding: var(--section-pad) 0;
    background: var(--bg-dark);
    text-align: center;
}

.brokerage-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 60px;
    text-align: left;
}

.brokerage-card {
    background: var(--bg-dark-card);
    border: 1px solid var(--border-dark);
    border-radius: 20px;
    padding: 36px;
    transition: var(--transition-medium);
}

.brokerage-card:hover {
    border-color: rgba(74, 125, 255, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(74, 125, 255, 0.1);
}

.brokerage-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.brokerage-card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 10px;
}

.brokerage-card-desc {
    font-size: 0.95rem;
    color: var(--text-muted-light);
    line-height: 1.7;
}

/* ================================================
   SECTION 8: STATS
   ================================================ */
.stats-section {
    padding: 80px 0;
    background: var(--bg-dark);
    text-align: center;
    border-top: 1px solid var(--border-dark);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--accent-blue);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 4px;
}

.stat-detail {
    font-size: 0.85rem;
    color: var(--text-muted-light);
}

/* ================================================
   SECTION 9: TESTIMONIALS
   ================================================ */
.testimonials {
    padding: var(--section-pad) 0;
    background: var(--bg-dark);
    overflow: hidden;
    border-top: 1px solid var(--border-dark);
}

.testimonial-carousel {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 20px 0;
    scrollbar-width: none;
}

.testimonial-carousel::-webkit-scrollbar {
    display: none;
}

.testimonial-card {
    flex-shrink: 0;
    width: 340px;
    background: var(--bg-dark-card);
    border: 1px solid var(--border-dark);
    border-radius: 20px;
    overflow: hidden;
    scroll-snap-align: start;
    transition: var(--transition-medium);
}

.testimonial-card:hover {
    border-color: rgba(74, 125, 255, 0.2);
}

.testimonial-portrait {
    width: 100%;
    height: 300px;
    overflow: hidden;
    background: linear-gradient(135deg, #2a2a2a 0%, #1a1a1a 100%);
}

.placeholder-portrait {
    display: flex;
    align-items: center;
    justify-content: center;
}

.portrait-placeholder {
    font-size: 5rem;
    opacity: 0.3;
}

.portrait-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.testimonial-content {
    padding: 24px;
}

.testimonial-quote {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author strong {
    display: block;
    font-size: 0.95rem;
    color: var(--text-light);
    font-weight: 600;
}

.testimonial-author span {
    font-size: 0.85rem;
    color: var(--text-muted-light);
}

/* ================================================
   SECTION 10: PARTNER WITH US
   ================================================ */
.partner-section {
    padding: var(--section-pad) 0;
    text-align: center;
    background: var(--bg-warm);
}

.partner-eyebrow {
    display: inline-block;
    padding: 6px 18px;
    background: var(--accent-glow);
    color: var(--accent-blue);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.partner-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 56px;
    text-align: left;
}

.partner-card {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    padding: 36px 32px;
    transition: var(--transition-medium);
    box-shadow: var(--shadow-soft);
}

.partner-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(74, 125, 255, 0.25);
}

.partner-card-icon {
    font-size: 2rem;
    margin-bottom: 18px;
}

.partner-card-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.partner-card-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.partner-cta-wrap {
    margin-top: 56px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.partner-cta-note {
    font-size: 0.88rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* ================================================
   SECTION 11: FINAL CTA
   ================================================ */
.final-cta {
    padding: var(--section-pad) 0;
    text-align: center;
    background: var(--white);
}

/* ================================================
   SECTION 12: FOOTER
   ================================================ */
.footer {
    padding: 60px 0 40px;
    background: var(--bg-dark);
    color: var(--text-muted-light);
}

.footer-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border-dark);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-logo {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: cover;
}

.footer-brand-name {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-light);
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-muted-light);
}

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

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 24px;
    font-size: 0.85rem;
}

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

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

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

/* ================================================
   RESPONSIVE — Tablet (max-width: 900px)
   ================================================ */
@media (max-width: 900px) {
    :root {
        --section-pad: 80px;
    }

    .realtors-split {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .realtors-right {
        position: relative;
        top: 0;
    }

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

    .partner-cards {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
}

/* ================================================
   RESPONSIVE — Mobile (max-width: 640px)
   ================================================ */
@media (max-width: 640px) {
    :root {
        --section-pad: 60px;
    }

    /* Nav */
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-soft);
    }

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

    .nav-cta {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    /* Hero */
    .hero {
        padding: 120px 20px 60px;
    }

    .hero-title {
        font-size: clamp(2rem, 8vw, 2.8rem);
    }

    .hero-glow {
        width: 500px;
        height: 500px;
    }

    /* Realtors */
    .realtors-split {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .realtors-right {
        position: relative;
        top: 0;
    }

    .phone-mockup-wrapper {
        max-width: 320px;
    }

    /* Brokerages */
    .brokerage-cards {
        grid-template-columns: 1fr;
    }

    /* Stats */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    /* Testimonials */
    .testimonial-card {
        width: 300px;
    }

    /* Partner */
    .partner-cards {
        grid-template-columns: 1fr;
    }

    /* How It Works */
    .agent-flow {
        gap: 16px;
    }

    .flow-step {
        padding: 16px 20px;
        min-width: 100px;
    }

    /* Footer */
    .footer-top {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}