/* ============================================
   Geotechnickal -- Main Stylesheet
   Environmental GIS & Geospatial Consulting
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --color-primary: #1B4332;
    --color-secondary: #2D6A4F;
    --color-accent: #D4A373;
    --color-bg: #F5F5F0;
    --color-text: #333333;
    --color-light-bg: #E8E8E0;
    --color-white: #FFFFFF;
    --color-primary-light: rgba(27, 67, 50, 0.08);
    --color-topo: rgba(45, 106, 79, 0.06);

    --font-main: 'Inter', 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-code: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    --shadow-sm: 0 1px 2px rgba(27, 67, 50, 0.05), 0 2px 8px rgba(27, 67, 50, 0.07);
    --shadow-md: 0 4px 8px rgba(27, 67, 50, 0.07), 0 12px 28px rgba(27, 67, 50, 0.11);
    --shadow-lg: 0 10px 20px rgba(27, 67, 50, 0.10), 0 28px 56px rgba(27, 67, 50, 0.16);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    --transition: 0.3s ease;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Skip Link (Accessibility) --- */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.75rem 1.5rem;
    z-index: 1000;
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-primary);
}

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
h4 { font-size: 1.25rem; margin-bottom: 0.5rem; }

p {
    margin-bottom: 1rem;
    max-width: 72ch;
}

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

a:hover { color: var(--color-accent); }

a:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

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

code {
    font-family: var(--font-code);
    font-size: 0.9rem;
    background: var(--color-primary-light);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
}

/* --- Layout Utilities --- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

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

.section--topo {
    position: relative;
    overflow: hidden;
}

/* Topographic line background pattern for sections */
.section--topo::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.35;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400' viewBox='0 0 400 400'%3E%3Cpath d='M0 200 Q100 160 200 200 T400 200' fill='none' stroke='%232D6A4F' stroke-width='0.5' opacity='0.3'/%3E%3Cpath d='M0 180 Q120 140 200 180 T400 180' fill='none' stroke='%232D6A4F' stroke-width='0.5' opacity='0.25'/%3E%3Cpath d='M0 220 Q80 260 200 220 T400 220' fill='none' stroke='%232D6A4F' stroke-width='0.5' opacity='0.25'/%3E%3Cpath d='M0 160 Q140 120 200 160 T400 160' fill='none' stroke='%232D6A4F' stroke-width='0.5' opacity='0.2'/%3E%3Cpath d='M0 240 Q60 280 200 240 T400 240' fill='none' stroke='%232D6A4F' stroke-width='0.5' opacity='0.2'/%3E%3Cpath d='M0 140 Q160 100 200 140 T400 140' fill='none' stroke='%232D6A4F' stroke-width='0.5' opacity='0.15'/%3E%3Cpath d='M0 260 Q40 300 200 260 T400 260' fill='none' stroke='%232D6A4F' stroke-width='0.5' opacity='0.15'/%3E%3Cpath d='M0 120 Q180 80 200 120 T400 120' fill='none' stroke='%232D6A4F' stroke-width='0.5' opacity='0.1'/%3E%3Cpath d='M0 280 Q20 320 200 280 T400 280' fill='none' stroke='%232D6A4F' stroke-width='0.5' opacity='0.1'/%3E%3C/svg%3E");
    background-size: 400px 400px;
}

.section__header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    z-index: 1;
}

.section__header p {
    margin: 0.5rem auto 0;
    color: #666;
    max-width: 600px;
}

/* Gold survey-line flourish under section headings */
.section__header h2::after {
    content: '';
    display: block;
    width: 56px;
    height: 3px;
    margin: 0.9rem auto 0;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
}

/* --- Coordinate badge (GIS flavor) --- */
.coord-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-code);
    font-size: 0.75rem;
    color: var(--color-secondary);
    opacity: 0.6;
    letter-spacing: 0.5px;
}

.coord-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

/* --- Header & Navigation --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}

.header--scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.nav__logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav__logo svg {
    width: 32px;
    height: 32px;
}

.nav__links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav__link {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text);
    text-decoration: none;
    position: relative;
    padding: 0.25rem 0;
    transition: color var(--transition);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition);
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-secondary);
}

.nav__link:hover::after,
.nav__link--active::after {
    width: 100%;
}

/* Mobile menu toggle */
.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    flex-direction: column;
    gap: 5px;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(145deg, var(--color-primary) 0%, #143728 40%, var(--color-secondary) 100%);
    color: var(--color-white);
    overflow: hidden;
    padding-top: 4rem;
}

/* Topographic contour pattern overlay on hero */
.hero__topo {
    position: absolute;
    inset: 0;
    opacity: 0.12;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='600' height='600' viewBox='0 0 600 600'%3E%3Cg fill='none' stroke='%23ffffff' stroke-width='1'%3E%3Cellipse cx='300' cy='300' rx='280' ry='200' opacity='0.3'/%3E%3Cellipse cx='300' cy='300' rx='240' ry='170' opacity='0.3'/%3E%3Cellipse cx='300' cy='300' rx='200' ry='140' opacity='0.3'/%3E%3Cellipse cx='300' cy='300' rx='160' ry='110' opacity='0.35'/%3E%3Cellipse cx='300' cy='300' rx='120' ry='80' opacity='0.35'/%3E%3Cellipse cx='300' cy='300' rx='80' ry='50' opacity='0.4'/%3E%3Cellipse cx='300' cy='300' rx='40' ry='25' opacity='0.4'/%3E%3C/g%3E%3C/svg%3E");
    background-size: 600px 600px;
    background-position: center;
}

/* Grid/graticule pattern on hero */
.hero__grid {
    position: absolute;
    inset: 0;
    opacity: 0.04;
    background-image:
        linear-gradient(rgba(255,255,255,0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.3) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* Animated 3D terrain canvas (sits above patterns, below content) */
.hero__canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    pointer-events: none;
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero__tagline {
    font-family: var(--font-code);
    font-size: 1.05rem;
    font-weight: 400;
    color: var(--color-accent);
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.hero__tagline strong {
    color: var(--color-white);
    font-weight: 600;
}

.hero__title {
    font-size: 3.5rem;
    color: var(--color-white);
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

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

.hero__description {
    font-size: 1.15rem;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: 2.5rem;
    max-width: 560px;
}

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

.hero__coords {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    font-family: var(--font-code);
    font-size: 0.8rem;
    color: rgba(255,255,255,0.3);
    z-index: 1;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    font-family: var(--font-main);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    text-decoration: none;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition);
}

.btn:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

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

.btn--primary:hover {
    background: #c4935f;
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255,255,255,0.5);
}

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

.btn--secondary {
    background: var(--color-secondary);
    color: var(--color-white);
}

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

/* --- Service Cards --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.service-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--color-accent);
    transition: height var(--transition);
}

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

.service-card:hover::after {
    height: 100%;
}

.service-card__icon {
    width: 56px;
    height: 56px;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--color-secondary);
}

.service-card__icon svg {
    width: 28px;
    height: 28px;
}

.service-card__title {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
}

.service-card__description {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 0;
}

/* --- Portfolio Cards --- */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.portfolio-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

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

.portfolio-card__image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-light-bg));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    font-size: 2.5rem;
    overflow: hidden;
}

.portfolio-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.portfolio-card:hover .portfolio-card__image img {
    transform: scale(1.05);
}

.portfolio-card__body {
    padding: 1.75rem;
}

.portfolio-card__category {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.portfolio-card__title {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
}

.portfolio-card__description {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.portfolio-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    font-size: 0.78rem;
    padding: 0.25rem 0.75rem;
    background: var(--color-primary-light);
    color: var(--color-secondary);
    border-radius: 100px;
    font-weight: 500;
}

/* --- Portfolio Filters --- */
.portfolio-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border: 2px solid var(--color-light-bg);
    background: var(--color-white);
    border-radius: 100px;
    font-family: var(--font-main);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    color: var(--color-text);
}

.filter-btn:hover,
.filter-btn--active {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
    background: var(--color-primary-light);
}

/* --- Skills Section --- */
.skills-container {
    position: relative;
    z-index: 1;
}

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

.skill-group {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

.skill-group__title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-group__title svg {
    width: 20px;
    height: 20px;
}

.skill-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-list li {
    padding: 0.35rem 0.9rem;
    background: var(--color-primary-light);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-primary);
    transition: all var(--transition);
}

.skill-list li:hover {
    background: var(--color-secondary);
    color: var(--color-white);
}

/* --- Stats / Metrics --- */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    text-align: center;
    padding: 3rem 0;
    position: relative;
    z-index: 1;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat__number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    text-shadow: 0 0 28px rgba(212, 163, 115, 0.45);
}

.stat__label {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.8);
    font-weight: 500;
}

/* --- Timeline --- */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-light-bg);
}

.timeline__item {
    position: relative;
    padding-bottom: 2.5rem;
    padding-left: 2rem;
}

.timeline__item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0.35rem;
    width: 12px;
    height: 12px;
    background: var(--color-accent);
    border-radius: 50%;
    border: 3px solid var(--color-bg);
    transform: translateX(-5px);
}

.timeline__date {
    font-family: var(--font-code);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 0.25rem;
}

.timeline__title {
    font-size: 1.15rem;
    margin-bottom: 0.25rem;
}

.timeline__subtitle {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.timeline__description {
    font-size: 0.9rem;
    color: #555;
    line-height: 1.6;
}

/* --- Contact Form --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form__label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
}

.form__input,
.form__textarea,
.form__select {
    padding: 0.85rem 1rem;
    border: 2px solid var(--color-light-bg);
    border-radius: var(--radius-md);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: border-color var(--transition);
    background: var(--color-white);
    color: var(--color-text);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
    outline: none;
    border-color: var(--color-secondary);
}

.form__textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-info__item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.contact-info__icon {
    width: 44px;
    height: 44px;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    flex-shrink: 0;
}

.contact-info__icon svg {
    width: 20px;
    height: 20px;
}

.contact-info__label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-primary);
}

.contact-info__value {
    font-size: 0.95rem;
    color: #666;
}

/* --- About Page --- */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    align-items: center;
}

.about-photo {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-light-bg);
    aspect-ratio: 3/4;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
}

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

.cert-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cert-card__icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    flex-shrink: 0;
}

.cert-card__title {
    font-weight: 600;
    font-size: 0.95rem;
}

.cert-card__issuer {
    font-size: 0.85rem;
    color: #666;
}

/* --- Services Page --- */
.service-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    padding: 3rem 0;
    border-bottom: 1px solid var(--color-light-bg);
}

.service-detail:last-child {
    border-bottom: none;
}

.service-detail:nth-child(even) {
    direction: rtl;
}

.service-detail:nth-child(even) > * {
    direction: ltr;
}

.service-detail__content h3 {
    margin-bottom: 1rem;
}

.service-detail__deliverables {
    margin-top: 1.5rem;
}

.service-detail__deliverables h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.service-detail__list {
    list-style: none;
    margin-top: 0.5rem;
}

.service-detail__list li {
    padding: 0.4rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
}

.service-detail__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.85rem;
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
}

.service-detail__visual {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-light-bg));
    border-radius: var(--radius-lg);
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    font-size: 3.5rem;
}

/* --- Footer --- */
.footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.8);
    padding: 3rem 0 1.5rem;
    position: relative;
    overflow: hidden;
}

/* Subtle topo in footer */
.footer::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.05;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400' viewBox='0 0 400 400'%3E%3Cg fill='none' stroke='%23ffffff' stroke-width='1'%3E%3Cellipse cx='200' cy='200' rx='180' ry='120'/%3E%3Cellipse cx='200' cy='200' rx='140' ry='90'/%3E%3Cellipse cx='200' cy='200' rx='100' ry='60'/%3E%3Cellipse cx='200' cy='200' rx='60' ry='35'/%3E%3C/g%3E%3C/svg%3E");
    background-size: 400px 400px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.footer__brand {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 0.75rem;
}

.footer__description {
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 300px;
}

.footer__heading {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 1rem;
}

.footer__links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer__link {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer__link:hover {
    color: var(--color-accent);
}

.footer__social {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.footer__social a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    transition: all var(--transition);
}

.footer__social a:hover {
    background: var(--color-accent);
    color: var(--color-primary);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.85rem;
    position: relative;
    z-index: 1;
}

/* --- Scroll Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Stagger children */
.fade-in--delay-1 { transition-delay: 0.1s; }
.fade-in--delay-2 { transition-delay: 0.2s; }
.fade-in--delay-3 { transition-delay: 0.3s; }
.fade-in--delay-4 { transition-delay: 0.4s; }
.fade-in--delay-5 { transition-delay: 0.5s; }

/* --- Page Header (inner pages) --- */
.page-header {
    background: linear-gradient(145deg, var(--color-primary) 0%, #143728 40%, var(--color-secondary) 100%);
    color: var(--color-white);
    padding: 8rem 0 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.08;
    background-image:
        linear-gradient(rgba(255,255,255,0.2) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.2) 1px, transparent 1px);
    background-size: 60px 60px;
}

.page-header h1 {
    color: var(--color-white);
    margin-bottom: 0.5rem;
    position: relative;
}

.page-header p {
    margin: 0 auto;
    opacity: 0.85;
    font-size: 1.15rem;
    position: relative;
}

/* --- CTA Section --- */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    text-align: center;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.06;
    background-image:
        linear-gradient(rgba(255,255,255,0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.3) 1px, transparent 1px);
    background-size: 60px 60px;
}

.cta-section h2 {
    color: var(--color-white);
    margin-bottom: 1rem;
    position: relative;
}

.cta-section p {
    margin: 0 auto 2rem;
    opacity: 0.9;
    position: relative;
}

.cta-section .btn {
    position: relative;
}

/* --- Blog Cards --- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.blog-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
}

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

.blog-card__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-light-bg));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    font-size: 2rem;
}

.blog-card__body {
    padding: 1.75rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-card__meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
    color: #6a6a6a;
}

.blog-card__date {
    font-family: var(--font-code);
    font-size: 0.78rem;
}

.blog-card__topic {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-accent);
}

.blog-card__title {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    line-height: 1.35;
}

.blog-card__title a {
    color: var(--color-primary);
    text-decoration: none;
}

.blog-card__title a:hover {
    color: var(--color-secondary);
}

.blog-card__excerpt {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.25rem;
    flex: 1;
}

.blog-card__read-more {
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.blog-card__read-more::after {
    content: '\2192';
    transition: transform var(--transition);
}

.blog-card__read-more:hover::after {
    transform: translateX(4px);
}

/* --- Blog Featured (large card) --- */
.blog-featured {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 0;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0, 0, 0, 0.04);
    margin-bottom: 3rem;
    transition: all var(--transition);
}

.blog-featured:hover {
    box-shadow: var(--shadow-lg);
}

.blog-featured__image {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    min-height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.3);
    font-size: 4rem;
}

.blog-featured__body {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.blog-featured__body .blog-card__title {
    font-size: 1.5rem;
}

/* --- Blog Post (single article) --- */
.blog-post {
    max-width: 760px;
    margin: 0 auto;
}

.blog-post__header {
    margin-bottom: 2.5rem;
}

.blog-post__meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
    color: #6a6a6a;
}

.blog-post__title {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.blog-post__subtitle {
    font-size: 1.2rem;
    color: #666;
    line-height: 1.6;
}

.blog-post__content {
    font-size: 1.05rem;
    line-height: 1.85;
}

.blog-post__content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.blog-post__content h3 {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.blog-post__content p {
    margin-bottom: 1.25rem;
    max-width: none;
}

.blog-post__content ul,
.blog-post__content ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.blog-post__content li {
    margin-bottom: 0.4rem;
}

.blog-post__content pre {
    background: var(--color-primary);
    color: rgba(255,255,255,0.9);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: 1.5rem;
    font-family: var(--font-code);
    font-size: 0.9rem;
    line-height: 1.6;
}

.blog-post__content blockquote {
    border-left: 4px solid var(--color-accent);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: var(--color-primary-light);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: #555;
}

.blog-post__content img {
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    box-shadow: var(--shadow-sm);
}

/* Blog post tags */
.blog-post__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-light-bg);
}

/* Blog sidebar / topic filters */
.blog-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 2.5rem;
}

.topic-btn {
    padding: 0.4rem 1rem;
    border: 2px solid var(--color-light-bg);
    background: var(--color-white);
    border-radius: 100px;
    font-family: var(--font-main);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    color: var(--color-text);
}

.topic-btn:hover,
.topic-btn--active {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
    background: var(--color-primary-light);
}

/* --- Homepage Two-Column Layout --- */
.home-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.home-split__header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.home-split__header h2 {
    margin-bottom: 0;
}

.home-split__header a {
    font-size: 0.9rem;
    font-weight: 600;
}

/* Compact blog list for homepage */
.blog-list-compact {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.blog-list-item {
    display: flex;
    gap: 1.25rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-light-bg);
}

.blog-list-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.blog-list-item__number {
    font-family: var(--font-code);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-light-bg);
    line-height: 1;
    min-width: 2.5rem;
}

.blog-list-item__content {
    flex: 1;
}

.blog-list-item__date {
    font-family: var(--font-code);
    font-size: 0.75rem;
    color: #6a6a6a;
    margin-bottom: 0.25rem;
}

.blog-list-item__title {
    font-size: 1.05rem;
    margin-bottom: 0.35rem;
    line-height: 1.35;
}

.blog-list-item__title a {
    color: var(--color-primary);
}

.blog-list-item__title a:hover {
    color: var(--color-secondary);
}

.blog-list-item__excerpt {
    font-size: 0.88rem;
    color: #666;
    line-height: 1.5;
}

/* Compact portfolio for homepage */
.portfolio-list-compact {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.portfolio-compact-card {
    display: flex;
    gap: 1.25rem;
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid rgba(0,0,0,0.04);
}

.portfolio-compact-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.portfolio-compact-card__thumb {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-light-bg));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    flex-shrink: 0;
}

.portfolio-compact-card__thumb svg {
    width: 36px;
    height: 36px;
    opacity: 0.5;
}

.portfolio-compact-card__body {
    flex: 1;
    min-width: 0;
}

.portfolio-compact-card__category {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-accent);
    margin-bottom: 0.2rem;
}

.portfolio-compact-card__title {
    font-size: 1rem;
    margin-bottom: 0.3rem;
}

.portfolio-compact-card__description {
    font-size: 0.85rem;
    color: #666;
    line-height: 1.5;
}

/* --- Stats Band (dark section wrapping .stats-bar) --- */
.stats-section {
    background: linear-gradient(145deg, var(--color-primary) 0%, #143728 40%, var(--color-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.06;
    background-image:
        linear-gradient(rgba(255,255,255,0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.3) 1px, transparent 1px);
    background-size: 60px 60px;
}

.stat__note {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.5);
    font-family: var(--font-code);
}

/* --- Hero credential line --- */
.hero__creds {
    font-family: var(--font-code);
    font-size: 0.85rem;
    color: rgba(255,255,255,0.65);
    letter-spacing: 0.5px;
    margin-top: 1.5rem;
}

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

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

.edu-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border-top: 4px solid var(--color-accent);
}

.edu-card__year {
    font-family: var(--font-code);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.edu-card__degree {
    font-size: 1.15rem;
    margin-bottom: 0.25rem;
}

.edu-card__school {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 0.75rem;
}

.edu-card__detail {
    font-size: 0.9rem;
    color: #555;
    line-height: 1.6;
    margin-bottom: 0;
}

/* --- Publication Card --- */
.pub-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--color-secondary);
    max-width: 800px;
    margin: 0 auto 3rem;
}

.pub-card__type {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.pub-card__citation {
    font-size: 0.98rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 0.75rem;
    max-width: none;
}

.pub-card__link {
    font-family: var(--font-code);
    font-size: 0.85rem;
}

/* --- Talks / Presentations List --- */
.talk-list {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
}

.talk-item {
    display: flex;
    gap: 1.5rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--color-light-bg);
    align-items: baseline;
}

.talk-item:last-child {
    border-bottom: none;
}

.talk-item__year {
    font-family: var(--font-code);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
    min-width: 5rem;
    flex-shrink: 0;
}

.talk-item__text {
    font-size: 0.95rem;
    color: #555;
}

/* --- About Page Two-Column Lists (teaching / affiliations) --- */
.about-lists {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 3rem;
    align-items: start;
    margin-top: 3rem;
}

.about-lists h3 {
    font-size: 1.1rem;
    color: var(--color-secondary);
    margin-bottom: 1rem;
}

.teach-list {
    list-style: none;
}

.teach-list li {
    padding: 0.5rem 0 0.5rem 1.5rem;
    position: relative;
    font-size: 0.95rem;
    color: #555;
}

.teach-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 1rem;
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
}

/* --- Depth & Dimension Pass --- */

/* Subtle vertical surface gradient so cards read as physical panels */
.portfolio-card,
.service-card,
.skill-group,
.cert-card,
.edu-card,
.pub-card,
.blog-card,
.portfolio-compact-card {
    background: linear-gradient(180deg, #ffffff 0%, #fbfbf7 100%);
}

/* Button depth: resting shadow + press feedback */
.btn--primary {
    box-shadow: 0 3px 10px rgba(212, 163, 115, 0.35), 0 1px 2px rgba(0, 0, 0, 0.12);
}

.btn--secondary {
    box-shadow: 0 3px 10px rgba(27, 67, 50, 0.28);
}

.btn:active {
    transform: translateY(1px) scale(0.99);
}

/* Hero title depth */
.hero__title {
    text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
}

/* Page header graticule gets a soft vignette for depth */
.page-header::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 120%, rgba(212, 163, 115, 0.12), transparent 55%);
    pointer-events: none;
}