/* ===========================
   CSS Custom Properties
   =========================== */
:root {
    /* Colors */
    --accent: #C0392B;
    --accent-hover: #922B21;
    --accent-light: #F5B7B1;
    --dark: #1A1A2E;
    --medium-gray: #5D6D7E;
    --light-gray: #F4F6F8;
    --white: #FFFFFF;

    /* Typography */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --section-padding: 6rem 0;
    --container-width: 1200px;
    --container-padding: 0 2rem;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--dark);
    background-color: var(--white);
    -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;
}

ul {
    list-style: none;
}

.hidden-field {
    display: none !important;
}

/* ===========================
   Navigation
   =========================== */
.nav-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.25rem 0;
    transition: background-color 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}

.nav-header.scrolled {
    background-color: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    padding: 0.75rem 0;
}

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

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark);
    transition: color 0.3s ease;
}

.nav-header.scrolled .nav-logo {
    color: var(--white);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--dark);
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-header.scrolled .nav-links a {
    color: rgba(255, 255, 255, 0.85);
}

.nav-header.scrolled .nav-links a:hover {
    color: var(--white);
}

/* Hamburger */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1100;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--dark);
    position: relative;
    transition: background-color 0.3s ease;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--dark);
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

.nav-header.scrolled .hamburger,
.nav-header.scrolled .hamburger::before,
.nav-header.scrolled .hamburger::after {
    background-color: var(--white);
}

/* Mobile menu open state */
.nav-toggle.open .hamburger {
    background-color: transparent;
}

.nav-toggle.open .hamburger::before {
    transform: translateY(7px) rotate(45deg);
    background-color: var(--white);
}

.nav-toggle.open .hamburger::after {
    transform: translateY(-7px) rotate(-45deg);
    background-color: var(--white);
}

/* Mobile Menu Overlay */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(26, 26, 46, 0.98);
    z-index: 1050;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu.open {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-links {
    text-align: center;
}

.mobile-menu-links li {
    margin: 2rem 0;
}

.mobile-menu-links a {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--white);
    transition: color 0.3s ease;
}

.mobile-menu-links a:hover {
    color: var(--accent-light);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: clip;
}

.hero-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--container-padding);
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 4rem;
}

.hero-text {
    animation: slideInLeft 0.8s ease-out;
}

.hero-eyebrow {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 1rem;
}

.hero-name {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    color: var(--dark);
    margin-bottom: 1.25rem;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--medium-gray);
    line-height: 1.7;
    margin-bottom: 2rem;
    max-width: 540px;
}

.hero-ctas {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.hero-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    color: var(--medium-gray);
    transition: color 0.3s ease, background-color 0.3s ease;
}

.hero-social a:hover {
    color: var(--accent);
    background-color: var(--light-gray);
}

.hero-image-wrapper {
    position: relative;
    animation: fadeInRight 0.8s ease-out 0.2s both;
}

.hero-image-decoration {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    background-color: var(--accent-light);
    border-radius: 1rem;
    transform: rotate(3deg);
    z-index: 0;
}

.hero-image {
    position: relative;
    z-index: 1;
    border-radius: 1rem;
    width: 100%;
    max-width: 450px;
    object-fit: cover;
    object-position: top;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 2rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(192, 57, 43, 0.3);
}

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

.btn-outline:hover {
    background-color: var(--accent);
    color: var(--white);
    transform: translateY(-2px);
}

/* ===========================
   Section Common
   =========================== */
.section-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--container-padding);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 3vw, 3rem);
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
    text-align: center;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--accent);
    margin: 0.75rem auto 0;
    border-radius: 2px;
}

.section-intro {
    text-align: center;
    color: var(--medium-gray);
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* ===========================
   About Section
   =========================== */
.about {
    padding: var(--section-padding);
    background-color: var(--light-gray);
}

.about-content {
    max-width: 800px;
    margin: 2.5rem auto 3rem;
    text-align: center;
}

.about-content p {
    margin-bottom: 1.25rem;
    color: var(--dark);
    line-height: 1.8;
}

.stat-cards {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat-card {
    background-color: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 0.75rem;
    padding: 2rem 2.5rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    flex: 1;
    min-width: 180px;
    max-width: 250px;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--medium-gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===========================
   Experience / Timeline
   =========================== */
.experience {
    padding: var(--section-padding);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 3rem auto 0;
    padding: 0 1rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: rgba(0, 0, 0, 0.08);
}

.timeline-item {
    display: flex;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item:nth-child(odd) {
    justify-content: flex-start;
    padding-right: calc(50% + 2rem);
    text-align: right;
}

.timeline-item:nth-child(even) {
    justify-content: flex-end;
    padding-left: calc(50% + 2rem);
    text-align: left;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0.5rem;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--white);
    border: 2px solid var(--medium-gray);
    z-index: 2;
    transition: all 0.3s ease;
}

.timeline-dot.active {
    width: 18px;
    height: 18px;
    background-color: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(192, 57, 43, 0.15);
}

.timeline-content {
    background-color: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 0.75rem;
    padding: 1.75rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.07);
}

.timeline-company {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 0.25rem;
}

.timeline-date {
    display: block;
    font-size: 0.8rem;
    color: var(--medium-gray);
    margin-bottom: 0.5rem;
}

.timeline-role {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.timeline-details {
    list-style: disc;
    padding-left: 1.25rem;
    text-align: left;
}

.timeline-item:nth-child(odd) .timeline-details {
    padding-left: 0;
    padding-right: 1.25rem;
    list-style-position: inside;
}

.timeline-details li {
    font-size: 0.9rem;
    color: var(--medium-gray);
    margin-bottom: 0.4rem;
    line-height: 1.6;
}

.timeline-details strong {
    color: var(--dark);
}

/* Education */
.education {
    text-align: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.education-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 1rem;
}

.education p {
    color: var(--medium-gray);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.education strong {
    color: var(--dark);
}

/* ===========================
   Speaking Section
   =========================== */
.speaking {
    padding: var(--section-padding);
    background-color: var(--light-gray);
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.event-card {
    background-color: var(--white);
    border-radius: 0.75rem;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.event-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.event-card-accent {
    height: 5px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
}

.event-card-content {
    padding: 2rem;
}

.event-name {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.event-host {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.event-topic {
    font-size: 0.95rem;
    color: var(--medium-gray);
    line-height: 1.6;
}

/* ===========================
   Contact Section
   =========================== */
.contact {
    padding: var(--section-padding);
}

.contact-centered {
    text-align: center;
    max-width: 600px;
    margin: 2.5rem auto 0;
}

.contact-intro {
    color: var(--medium-gray);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.btn-linkedin {
    gap: 0.6rem;
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

.contact-location {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    font-size: 0.95rem;
    color: var(--medium-gray);
}

.contact-location svg {
    color: var(--accent);
}

/* ===========================
   Footer
   =========================== */
.footer {
    background-color: var(--dark);
    padding: 2rem 0;
}

.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-nav {
    display: flex;
    gap: 2rem;
}

.footer-nav a {
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.3s ease;
}

.footer-nav a:hover {
    color: var(--white);
}

.footer-social a {
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.3s ease;
    display: inline-flex;
}

.footer-social a:hover {
    color: var(--white);
}

/* ===========================
   Animations
   =========================== */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scroll-triggered animations */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================
   Responsive — Tablet (768px)
   =========================== */
@media (max-width: 768px) {
    :root {
        --section-padding: 4rem 0;
    }

    /* Nav */
    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: block;
    }

    /* Hero */
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-text {
        order: 1;
    }

    .hero {
        min-height: auto;
        padding-top: 100px;
        padding-bottom: 3rem;
    }

    .hero-image-wrapper {
        order: 0;
        max-width: 180px;
        margin: 0 auto;
    }

    .hero-image-decoration {
        display: none;
    }

    .hero-image {
        max-height: 240px;
        object-fit: cover;
        object-position: top;
        border-radius: 50%;
        width: 180px;
        height: 180px;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-ctas {
        justify-content: center;
    }

    .hero-social {
        text-align: center;
    }

    /* Timeline */
    .timeline::before {
        left: 0;
    }

    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        padding-left: 2.5rem;
        padding-right: 0;
        text-align: left;
        justify-content: flex-start;
    }

    .timeline-item:nth-child(odd) .timeline-details {
        padding-left: 1.25rem;
        padding-right: 0;
        list-style-position: outside;
    }

    .timeline-dot {
        left: 0;
        transform: translateX(-50%);
    }

    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    /* Footer */
    .footer-container {
        flex-direction: column;
        text-align: center;
    }

    .footer-nav {
        gap: 1.5rem;
    }
}

/* ===========================
   Responsive — Mobile (480px)
   =========================== */
@media (max-width: 480px) {
    :root {
        --section-padding: 3rem 0;
        --container-padding: 0 1.25rem;
    }

    .hero-name {
        font-size: 2.2rem;
    }

    .stat-cards {
        flex-direction: column;
        align-items: center;
    }

    .stat-card {
        max-width: 100%;
        width: 100%;
    }

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

    .hero-ctas {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}