/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Light theme (default) - Teal/Cyan Edition */
:root {
    --primary-color: #0e6990;
    --primary-dark: #155675;
    --accent-color: #0883b2;
    --secondary-color: #5f788a;
    --text-primary: #0f152a;
    --text-secondary: #475269;
    --bg-primary: #fbfeff;
    --bg-secondary: #edf7f8;
    --bg-tertiary: #d5f0f2;
    --border-color: #b8dde0;
    --header-bg: rgba(251, 254, 255, 0.90);
    --hero-gradient-start: #f0fdf5;
    --hero-gradient-mid: #edf7f8;
    --hero-gradient-end: #e3f3f4;
    --hero-text-color: #0f152a;
    --gradient-overlay-1: rgba(8, 131, 178, 0.06);
    --gradient-overlay-2: rgba(6, 165, 212, 0.06);
    --shadow-sm: 0 1px 2px 0 rgba(15, 21, 42, 0.08);
    --shadow-md: 0 4px 6px -1px rgba(15, 21, 42, 0.12);
    --shadow-lg: 0 10px 15px -3px rgba(15, 21, 42, 0.15);
    --shadow-xl: 0 20px 25px -5px rgba(15, 21, 42, 0.18);
    --btn-primary-hover-shadow: 0 10px 25px rgba(8, 131, 178, 0.35), 0 6px 15px rgba(6, 165, 212, 0.2);
    --btn-secondary-hover-bg: rgba(8, 131, 178, 0.1);
    --gradient-placeholder: linear-gradient(135deg, rgba(8, 131, 178, 0.18), rgba(6, 165, 212, 0.18));
    --card-overlay: rgba(8, 131, 178, 0.04);
    --talk-gradient-start: #ca9b04;
    --talk-gradient-end: #a16f07;
}

/* Dark theme - Enhanced Teal/Cyan Edition */
:root[data-theme="dark"] {
    --primary-color: #6dcae0;
    --primary-dark: #4aadcc;
    --accent-color: #aedfed;
    --secondary-color: #7dc0bb;
    --text-primary: #f1f4f9;
    --text-secondary: #cbd3e1;
    --bg-primary: #0a1319;
    --bg-secondary: #0f1d25;
    --bg-tertiary: #132630;
    --border-color: #1e3747;
    --header-bg: rgba(10, 19, 25, 0.90);
    --hero-gradient-start: #0d1b24;
    --hero-gradient-mid: #0b161e;
    --hero-gradient-end: #0a1319;
    --hero-text-color: #f1f4f9;
    --gradient-overlay-1: rgba(34, 194, 238, 0.03);
    --gradient-overlay-2: rgba(103, 220, 249, 0.04);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.7);
    --btn-primary-hover-shadow: 0 10px 25px rgba(34, 194, 238, 0.45), 0 6px 15px rgba(103, 220, 249, 0.25);
    --btn-secondary-hover-bg: rgba(34, 194, 238, 0.13);
    --gradient-placeholder: linear-gradient(135deg, rgba(34, 194, 238, 0.24), rgba(103, 220, 249, 0.26));
    --card-overlay: rgba(103, 220, 249, 0.04);
}

/* Dark theme specific overrides
   These override the light theme's solid color styling.
   Light theme uses solid colors with white text for buttons/tags,
   but dark theme uses white overlays on gradients for brightness instead. */
:root[data-theme="dark"] .btn-primary {
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.35), rgba(255, 255, 255, 0.25)),
        linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #0a1319;
}

:root[data-theme="dark"] .publication-type {
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.3)),
        var(--primary-color);
    color: #0a1319;
}

:root[data-theme="dark"] .publication-type.talk {
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.4)),
        linear-gradient(135deg, #fbd124, #f5b20b);
    color: #0a1319;
}

html {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s, color 0.3s;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    background-image:
        radial-gradient(at 20% 30%, var(--gradient-overlay-1) 0px, transparent 50%),
        radial-gradient(at 80% 70%, var(--gradient-overlay-2) 0px, transparent 50%);
    transition: background-color 0.3s, color 0.3s;
}

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s, color 0.3s;
}

a:hover {
    border-bottom-color: var(--primary-color);
}

/* Override for specific components with their own link styles */
.nav-links a,
.logo,
.theme-toggle,
.btn,
.btn-primary,
.btn-secondary,
.contact-link,
.back-link {
    border-bottom: none;
}

.container {
    max-width: 75em;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Navigation */
header {
    background-color: var(--header-bg);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    container-type: inline-size;
    container-name: navigation;
    overflow: hidden;
    height: 2.5em;
}

nav.container {
    padding-top: 0.2em;
    padding-bottom: 0.2em;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.2rem;
    color: var(--primary-color);
    height: 2.5em;
}

.logo-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.3rem;
    font-weight: 400;
    letter-spacing: 0.25em;
}

.logo-text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text-highlight {
    background: var(--text-secondary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Legacy class for backwards compatibility */
.logo-text-n {
    background: none;
    -webkit-text-fill-color: var(--text-secondary);
    color: var(--text-secondary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
    height: 2.5em;
}

.nav-items-wrappable {
    display: flex;
    gap: 2rem;
    align-items: center;
    align-content: flex-start;
    flex-wrap: wrap;
    justify-content: flex-end;
    height: 2.5em;
}

nav a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s;
    white-space: nowrap;
    height: 2.5em;
    display: flex;
    align-items: center;
    -webkit-tap-highlight-color: transparent;
}

nav a:hover {
    color: var(--primary-color);
}

/* Logo link has special color */
.logo {
    color: var(--primary-color);
}

/* Focus states for accessibility */
/* Fallback for browsers that don't support :focus-visible */
nav a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 4px;
}

/* Modern browsers: only show focus on keyboard navigation */
nav a:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 4px;
}

/* Modern browsers: hide focus outline on mouse/touch interaction */
nav a:focus:not(:focus-visible) {
    outline: none;
}

nav a:active {
    opacity: 0.7;
}

/* Theme Toggle */
.theme-toggle {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s;
    display: flex;
    align-items: center;
}

.theme-toggle:hover {
    color: var(--primary-color);
}

.theme-icon {
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Hero Section */
#hero {
    background: linear-gradient(180deg, var(--hero-gradient-start) 0%, var(--hero-gradient-mid) 50%, var(--hero-gradient-end) 100%);
    position: relative;
    color: var(--hero-text-color);
    padding: 6rem 0;
    text-align: center;
    overflow: hidden;
    transition: background 0.3s, color 0.3s;
}

#hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='1' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.08;
    mix-blend-mode: overlay;
    pointer-events: none;
}

#hero .container {
    position: relative;
    z-index: 1;
    container-type: inline-size;
    container-name: hero-section;
}

#hero h1 {
    font-size: clamp(1.9rem, 8cqi, 4rem);
    font-weight: 300;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin-bottom: 1rem;
    letter-spacing: clamp(0.1rem, 0.3cqi, 0.3rem);
    text-transform: uppercase;
}

.hero-text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text-highlight {
    background: var(--text-secondary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Legacy class for backwards compatibility */
.hero-text-n {
    background: var(--text-secondary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    color: var(--text-secondary);
}

.hero-description {
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.85;
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--btn-primary-hover-shadow);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--btn-secondary-hover-bg);
    transform: translateY(-2px);
}

/* Section Styles */
section {
    padding: 5rem 0;
}

section.alt-bg {
    background-color: var(--bg-secondary);
}

/* Card contrast: ensure cards always contrast with section background */
/* Default sections (dark bg): cards are lighter */
.skill-card,
.service-card,
.project-card,
.publication-card,
.testimonial-card,
.contact-link {
    background: var(--bg-secondary);
}

/* Alt-bg sections: cards with subtle overlay for brightness */
section.alt-bg .skill-card,
section.alt-bg .service-card,
section.alt-bg .project-card,
section.alt-bg .publication-card,
section.alt-bg .testimonial-card,
section.alt-bg .contact-link {
    /* Base color with static overlay for subtle brightness */
    background:
        linear-gradient(var(--card-overlay), var(--card-overlay)),
        var(--bg-primary);
}

h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    text-align: center;
}

.section-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 3rem;
}

/* About Section */
.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-intro {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
    align-items: start;
}

.about-photo {
    position: sticky;
    top: 100px;
}

.profile-photo {
    width: 300px;
    height: 400px;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    object-fit: cover;
    display: block;
}

.about-intro-text h3 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.about-intro-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

#about .container {
    container-type: inline-size;
    container-name: about-section;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

@container about-section (max-width: 700px) {
    .expertise-grid {
        grid-template-columns: 1fr;
    }

    .about-intro {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-photo {
        position: static;
    }
}

.expertise-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
}

.expertise-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.expertise-card h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.expertise-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Skills Section */
#skills .container {
    container-type: inline-size;
    container-name: skills-section;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

@container skills-section (max-width: 800px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

.skill-card {
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.skill-card h3 {
    color: var(--text-primary);
    font-size: 1.375rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.skill-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background: transparent;
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.8rem;
    font-weight: 400;
    border: 1px solid var(--border-color);
    opacity: 0.7;
}

/* Services Section */
#services .container {
    container-type: inline-size;
    container-name: services-section;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

@container services-section (max-width: 750px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
}

.service-card {
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Service icon colors */
.service-card:nth-child(1) .service-icon {
    color: #ef5244;
}

.service-card:nth-child(2) .service-icon {
    color: #fbd124;
}

.service-card:nth-child(3) .service-icon {
    color: #3b72f6;
}

.service-card:nth-child(4) .service-icon {
    color: #ec488b;
}

.service-card:nth-child(5) .service-icon {
    color: #10b98f;
}

.service-card:nth-child(6) .service-icon {
    color: #985cf6;
}

.service-card h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.service-note {
    background: var(--bg-tertiary);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    border-radius: 0.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.service-note p {
    color: var(--text-secondary);
    margin: 0;
}

/* Projects Section */
#projects .container {
    container-type: inline-size;
    container-name: projects-section;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

@container projects-section (max-width: 750px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

.project-card {
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.project-card.placeholder {
    opacity: 0.7;
    border-style: dashed;
}

.project-card h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.project-role {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.tag {
    background: transparent;
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.8rem;
    font-weight: 400;
    border: 1px solid var(--border-color);
    opacity: 0.7;
}

/* Publications & Talks Section */
#publications .container {
    container-type: inline-size;
    container-name: publications-section;
}

.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(24em, 1fr));
    gap: 2rem;
}

@container publications-section (max-width: 52em) {
    .publications-grid {
        grid-template-columns: 1fr;
    }
}

.publication-card {
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
}

.publication-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.publication-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.publication-card h3 {
    font-size: 1.35rem;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
    line-height: 1.3;
}

.publication-type {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.publication-type.talk {
    background: linear-gradient(135deg, var(--talk-gradient-start), var(--talk-gradient-end));
    color: white;
}

.publication-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.publication-venue {
    color: var(--primary-color);
    font-weight: 500;
}

.publication-date {
    color: var(--text-secondary);
}

.publication-abstract {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.publication-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.publication-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    color: var(--primary-color);
    border-radius: 0.375rem;
    font-weight: 500;
    transition: background 0.3s, transform 0.2s;
    border: 1px solid var(--border-color);
}

.publication-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    border-bottom: 1px solid var(--primary-color);
}

.publication-link i {
    font-size: 1rem;
}

/* Section Collapse/Expand Functionality */
.section-collapsible-wrapper {
    position: relative;
    transition: max-height 0.5s ease-in-out;
}

.section-collapsible-wrapper.collapsed {
    max-height: 600px;
    overflow: hidden;
}

/* Fade effect applied at section level to span full width */
section.section-collapsed {
    position: relative;
}

section.section-collapsed::after {
    content: '';
    position: absolute;
    /* Position fade to start 200px before end of collapsed wrapper and extend to bottom of section */
    top: calc(5rem + 600px - 200px);
    left: 0;
    right: 0;
    bottom: 0;
    /* Gradient transitions over first 200px, then stays solid */
    background: linear-gradient(to bottom, transparent 0, var(--bg-primary) 200px);
    pointer-events: none;
    z-index: 1;
}

section.section-collapsed.alt-bg::after {
    background: linear-gradient(to bottom, transparent 0, var(--bg-secondary) 200px);
}

.section-expand-btn {
    display: none;
    margin: 2rem auto 0;
    padding: 0.75rem 2rem;
    background: var(--bg-tertiary);
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    z-index: 2;
}

.section-expand-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.section-expand-btn i {
    margin-left: 0.5rem;
}

.section-expand-btn.visible {
    display: block;
}

/* Testimonials Section */
#testimonials .container {
    container-type: inline-size;
    container-name: testimonials-section;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

@container testimonials-section (max-width: 950px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

.testimonial-card {
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.testimonial-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.testimonial-card.placeholder {
    opacity: 0.6;
    border-top-color: var(--border-color);
}

.testimonial-text {
    font-size: 1.125rem;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.testimonial-author {
    color: var(--text-primary);
    font-weight: 600;
}

/* Contact Section */
#contact .container {
    container-type: inline-size;
    container-name: contact-section;
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@container contact-section (max-width: 700px) {
    .contact-links {
        grid-template-columns: 1fr;
    }
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
}

.contact-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

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

.contact-link strong {
    display: block;
    color: var(--text-primary);
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.contact-link p {
    color: var(--text-secondary);
    margin: 0;
}

.contact-note {
    text-align: center;
    color: var(--text-secondary);
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
}

/* Footer */
footer {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

footer p {
    margin: 0.5rem 0;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

footer a:hover {
    border-bottom-color: var(--primary-color);
}

/* Responsive Design - Container Queries */
/* Nav items now hide automatically via flex-wrap + overflow:hidden */
/* Elements wrap to second line when space is limited, then get clipped */

/* Mobile optimizations - compact spacing */
@container navigation (max-width: 550px) {
    nav.container {
        padding-left: 1em;
        padding-right: 1em;
    }

    .logo {
        margin-left: -1em;
        margin-right: 1.5rem;
    }

    .nav-links {
        gap: 0.75rem;
        font-size: 0.95rem;
    }

    .nav-items-wrappable {
        gap: 0.75rem;
    }
}

/* Very narrow: Reduce logo size */
@container navigation (max-width: 470px) {
    .logo {
        gap: 0;
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }

    .logo-text {
        letter-spacing: 0;
    }
}

/* Mobile: Always hide theme toggle on touch devices (regardless of width) */
@media (hover: none) and (pointer: coarse) {
    .theme-toggle {
        display: none;
    }
}

/* Hero Section: Medium screens */
@container hero-section (max-width: 768px) {
    .tagline {
        font-size: 1.25rem;
    }
}

/* Hero Section: Small screens */
@container hero-section (max-width: 480px) {
    #hero {
        padding: 4rem 0;
    }

    .tagline {
        font-size: 1.125rem;
    }

    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection Color */
::selection {
    background-color: var(--primary-color);
    color: var(--bg-primary);
}