/* ============================================
   LEAH KAT INSIGHTS — Light / Clean / Vercel-inspired
   ============================================ */

:root {
    --color-bg: #FFFFFF;
    --color-bg-alt: #FAFAFA;
    --color-bg-card: #FFFFFF;
    --color-bg-dark: #0A0A0A;
    --color-text: #0A0A0A;
    --color-text-mid: #666666;
    --color-text-dim: #999999;
    --color-accent: #D4829A;
    --color-accent-light: #E8A0B8;
    --color-accent-soft: rgba(212, 130, 154, 0.08);
    --color-accent-glow: rgba(212, 130, 154, 0.06);
    --color-border: #EAEAEA;
    --color-border-hover: #D4829A;

    --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Sora', -apple-system, sans-serif;
    --font-serif: 'Cormorant', Georgia, serif;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;

    --max-width: 1140px;
    --nav-height: 64px;

    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --transition-fast: 0.15s var(--ease-out);
    --transition-med: 0.3s var(--ease-out);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08);
    --glow-accent: 0 0 40px rgba(212, 130, 154, 0.1), 0 0 80px rgba(212, 130, 154, 0.05);
    --glow-text: 0 0 30px rgba(212, 130, 154, 0.2);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* --- Section Defaults --- */
.section-eyebrow {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
    letter-spacing: -0.035em;
}

.section-title em {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
    font-size: 1.15em;
    color: var(--color-accent);
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg);
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: background var(--transition-med), box-shadow var(--transition-med);
    border-bottom: 1px solid transparent;
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom-color: var(--color-border);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.7;
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-text-mid);
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--color-text);
    transition: width var(--transition-med);
}

.nav-link:hover::after {
    width: 100%;
}

/* Mobile toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 18px;
    height: 1.5px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: var(--space-lg);
    flex-direction: column;
    gap: var(--space-md);
    z-index: 999;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-med), opacity var(--transition-med);
    border-bottom: 1px solid var(--color-border);
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
}

.mobile-link {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    padding: var(--space-xs) 0;
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: var(--nav-height);
    background: var(--color-bg);
}

/* Soft ambient glow */
.hero::before {
    content: '';
    position: absolute;
    top: 10%;
    right: 15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(212, 130, 154, 0.06) 0%, transparent 70%);
    pointer-events: none;
    animation: orbFloat 10s ease-in-out infinite alternate;
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-2xl);
    align-items: center;
    width: 100%;
}

.hero-content {
    animation: fadeInUp 0.7s var(--ease-out) both;
}

.hero-eyebrow {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.hero-eyebrow::before {
    content: '';
    width: 20px;
    height: 1.5px;
    background: var(--color-accent);
}

.hero-title {
    line-height: 1.0;
    margin-bottom: var(--space-md);
}

.hero-name {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(3.2rem, 6.5vw, 5.5rem);
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.05em;
}

.hero-accent {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(3.8rem, 7.5vw, 6.5rem);
    font-weight: 400;
    font-style: italic;
    color: var(--color-accent);
    line-height: 1.15;
}

.hero-tagline {
    font-size: clamp(0.95rem, 1.2vw, 1.05rem);
    color: var(--color-text-mid);
    margin-bottom: var(--space-lg);
    max-width: 380px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    animation: fadeInUp 0.7s var(--ease-out) 0.12s both;
    width: 100%;
}

.hero-image-frame {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 3 / 4;
    max-height: 520px;
    box-shadow: var(--shadow-lg);
}

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

.hero-image-accent {
    position: absolute;
    bottom: -10px;
    left: -10px;
    width: 72px;
    height: 72px;
    border: 1.5px solid var(--color-accent);
    border-radius: var(--radius-md);
    opacity: 0.25;
    z-index: -1;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    animation: fadeInUp 0.7s var(--ease-out) 0.4s both;
}

.scroll-text {
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-text-dim);
}

.scroll-line {
    width: 1px;
    height: 32px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2.5s ease-in-out infinite;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.65rem 1.5rem;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
}

.btn-primary:hover {
    background: #333;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
    border-color: var(--color-text);
    color: var(--color-text);
    transform: translateY(-1px);
}

/* --- About --- */
.about {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.about-text {
    font-size: 0.98rem;
    color: var(--color-text-mid);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about-text strong {
    color: var(--color-text);
    font-weight: 600;
}

.about-image-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all var(--transition-med);
}

.about-image-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.about-image-card img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.about-image-caption {
    padding: var(--space-sm) var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.caption-name {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
}

.caption-title {
    font-size: 0.75rem;
    color: var(--color-text-dim);
}

/* --- Expertise --- */
.expertise {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.expertise-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg) var(--space-md);
    transition: all var(--transition-med);
    position: relative;
    overflow: hidden;
}

.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-med);
}

.expertise-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--glow-accent);
}

.expertise-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-soft);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
    color: var(--color-accent);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: -0.01em;
    color: var(--color-text);
}

.card-text {
    font-size: 0.88rem;
    color: var(--color-text-mid);
    line-height: 1.7;
}

/* --- Portfolio Teaser --- */
.portfolio-teaser {
    background: var(--color-bg-dark);
    position: relative;
    overflow: hidden;
}

.portfolio-teaser::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 500px;
    height: 500px;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(212, 130, 154, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

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

.portfolio-teaser .section-title {
    color: #F5F5F5;
}

.portfolio-teaser .section-title em {
    color: var(--color-accent-light);
    text-shadow: var(--glow-text);
}

.teaser-content {
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
}

.teaser-text {
    font-size: 0.95rem;
    color: #888;
    line-height: 1.8;
}

/* --- Credentials --- */
.credentials {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.credentials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-sm);
}

.credential-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg) var(--space-sm);
    text-align: center;
    transition: all var(--transition-med);
}

.credential-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    border-color: var(--color-border-hover);
}

.credential-featured {
    background: var(--color-bg-dark);
    border-color: var(--color-bg-dark);
    grid-column: span 2;
}

.credential-featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
}

.credential-featured .credential-title {
    color: #F5F5F5;
    font-size: 1.3rem;
}

.credential-featured .credential-org {
    color: var(--color-accent-light);
}

.credential-badge {
    display: inline-block;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent-light);
    background: rgba(212, 130, 154, 0.15);
    padding: 3px 12px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.credential-icon {
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
    display: flex;
    justify-content: center;
}

.credential-title {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 2px;
    letter-spacing: -0.01em;
}

.credential-org {
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

/* --- Contact --- */
.contact {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 400px;
    height: 400px;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(212, 130, 154, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.contact-content {
    text-align: center;
    max-width: 460px;
    margin: 0 auto;
}

.contact-text {
    font-size: 0.95rem;
    color: var(--color-text-mid);
    margin-bottom: var(--space-lg);
    line-height: 1.75;
}

.contact-links {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.contact-btn svg {
    flex-shrink: 0;
}

/* --- Footer --- */
.footer {
    background: var(--color-bg-alt);
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer-text {
    font-size: 0.7rem;
    color: var(--color-text-dim);
    letter-spacing: 0.02em;
}

/* --- Reveal Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.expertise-card.reveal:nth-child(2) { transition-delay: 0.08s; }
.expertise-card.reveal:nth-child(3) { transition-delay: 0.16s; }
.credential-card.reveal:nth-child(2) { transition-delay: 0.06s; }
.credential-card.reveal:nth-child(3) { transition-delay: 0.12s; }
.credential-card.reveal:nth-child(4) { transition-delay: 0.18s; }
.credential-card.reveal:nth-child(5) { transition-delay: 0.24s; }

/* --- Keyframes --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scrollPulse {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50% { opacity: 0.3; transform: scaleY(0.5); }
}

@keyframes orbFloat {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-20px, 15px); }
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .hero-container { gap: var(--space-xl); }
    .about-grid { gap: var(--space-lg); }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-toggle { display: flex; }
    .mobile-menu { display: flex; }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: var(--space-2xl);
    }

    .hero-content { order: 1; }

    .hero-image {
        order: 0;
        max-width: 240px;
        margin: 0 auto;
    }

    .hero-image-accent { display: none; }
    .hero-eyebrow::before { display: none; }
    .hero-tagline { margin-left: auto; margin-right: auto; }
    .hero-cta { justify-content: center; }
    .about-grid { grid-template-columns: 1fr; }

    .about-image {
        order: -1;
        max-width: 240px;
        margin: 0 auto;
    }

    .expertise-grid { grid-template-columns: 1fr; }
    .credential-featured { grid-column: span 1; }
    .credentials-grid { grid-template-columns: 1fr 1fr; }
    .section-container { padding: var(--space-2xl) var(--space-md); }
    .scroll-indicator { display: none; }
}

@media (max-width: 480px) {
    .credentials-grid { grid-template-columns: 1fr; }
    .hero-name { font-size: 2.5rem; }
    .hero-accent { font-size: 2.8rem; }
    .contact-links { flex-direction: column; align-items: center; }
}