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

:root {
    --text-dark: #222222;
    --text-medium: #555555;
    --text-light: #888888;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.5;
    color: var(--text-dark);
    background: var(--bg-white);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-medium);
    text-decoration: none;
    font-size: 0.85rem;
    text-transform: lowercase;
    letter-spacing: 0.05em;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--text-dark);
}

/* Header/Hero - Minimal style */
.hero {
    padding: 8rem 2rem 3rem;
    text-align: left;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.hero h2 {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--text-medium);
    margin-bottom: 1.5rem;
}

.tagline {
    display: none;
}

.hero-description {
    font-size: 1rem;
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.specialties {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.specialty {
    font-size: 0.8rem;
    color: var(--text-light);
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border-color);
    background: transparent;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

/* Buttons - Minimal */
.btn {
    display: inline-block;
    padding: 0.6rem 1.25rem;
    font-size: 0.85rem;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    text-transform: lowercase;
    letter-spacing: 0.05em;
}

.btn-primary {
    background: var(--text-dark);
    color: var(--bg-white);
    border: 1px solid var(--text-dark);
}

.btn-primary:hover {
    background: transparent;
    color: var(--text-dark);
}

.btn-secondary {
    background: transparent;
    color: var(--text-dark);
    border: 1px solid var(--text-dark);
}

.btn-secondary:hover {
    background: var(--text-dark);
    color: var(--bg-white);
}

/* Sections */
.section {
    padding: 3rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-alt {
    background: transparent;
}

.section-title {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 2rem;
    color: var(--text-dark);
    text-align: left;
}

/* About Section */
#about {
    border-top: 1px solid var(--border-color);
}

#about p {
    max-width: 600px;
    font-size: 1rem;
    color: var(--text-medium);
    line-height: 1.8;
}

/* Experience Section */
#experience {
    border-top: 1px solid var(--border-color);
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
}

.experience-column h3 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.experience-item {
    margin-bottom: 1.25rem;
}

.experience-item h4 {
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.15rem;
    color: var(--text-dark);
}

.experience-item .company {
    color: var(--text-light);
    font-size: 0.85rem;
}

/* Portfolio Section - Field Operations Style */
#portfolio {
    border-top: 1px solid var(--border-color);
    padding-bottom: 4rem;
}

.portfolio-category {
    margin-bottom: 0;
}

.portfolio-category h3 {
    display: none;
}

.project-grid {
    margin: 0;
}

.project-grid::after {
    content: '';
    display: block;
    clear: both;
}

.grid-sizer {
    width: calc(16.666% - 8.333px);
}

.project-card {
    background: var(--bg-white);
    overflow: hidden;
    cursor: pointer;
    position: relative;
    margin-bottom: 10px;
}

/* Size variations - 6 column grid */
.project-card.size-1col {
    width: calc(16.666% - 8.333px);
    height: 180px;
}

.project-card.size-small {
    width: calc(16.666% - 8.333px);
    height: 180px;
}

.project-card.size-medium {
    width: calc(33.333% - 8.333px);
    height: 200px;
}

.project-card.size-tall {
    width: calc(33.333% - 8.333px);
    height: 380px;
}

.project-card.size-wide {
    width: calc(50% - 8.333px);
    height: 200px;
}

.project-card.size-large {
    width: calc(50% - 8.333px);
    height: 380px;
}

.project-card:hover .project-image img {
    transform: scale(1.02);
}

.project-card:hover .project-content h4 {
    color: var(--text-light);
}

.project-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.project-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: white;
}

.project-card h4 {
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.2rem;
    color: white;
    transition: opacity 0.2s;
}

.project-card:hover h4 {
    opacity: 0.8;
}

.project-card p {
    display: none;
}

.project-date {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.8);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Contact Section */
#contact {
    border-top: 1px solid var(--border-color);
    text-align: left;
}

#contact p {
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

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

.contact-links .btn-secondary {
    border-color: var(--text-dark);
    color: var(--text-dark);
}

.contact-links .btn-secondary:hover {
    background: var(--text-dark);
    color: var(--bg-white);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    max-width: 1400px;
    margin: 0 auto;
}

.footer p {
    color: var(--text-light);
    font-size: 0.8rem;
}

/* Responsive Design */

/* 4 columns */
@media (max-width: 1400px) {
    .grid-sizer {
        width: calc(25% - 7.5px);
    }

    .project-card.size-small {
        width: calc(25% - 7.5px);
        height: 160px;
    }

    .project-card.size-medium {
        width: calc(25% - 7.5px);
        height: 180px;
    }

    .project-card.size-tall {
        width: calc(25% - 7.5px);
        height: 340px;
    }

    .project-card.size-wide {
        width: calc(50% - 7.5px);
        height: 180px;
    }

    .project-card.size-large {
        width: calc(50% - 7.5px);
        height: 340px;
    }
}

/* 3 columns */
@media (max-width: 1000px) {
    .grid-sizer {
        width: calc(33.333% - 6.666px);
    }

    .project-card.size-small,
    .project-card.size-medium {
        width: calc(33.333% - 6.666px);
        height: 180px;
    }

    .project-card.size-tall {
        width: calc(33.333% - 6.666px);
        height: 320px;
    }

    .project-card.size-wide,
    .project-card.size-large {
        width: calc(66.666% - 6.666px);
        height: 200px;
    }
}

/* 2 columns */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero {
        padding: 7rem 1.5rem 2rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .section {
        padding: 2rem 1.5rem;
    }

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

    .grid-sizer {
        width: calc(50% - 5px);
    }

    .project-card.size-small,
    .project-card.size-medium {
        width: calc(50% - 5px);
        height: 160px;
    }

    .project-card.size-tall,
    .project-card.size-large {
        width: calc(50% - 5px);
        height: 280px;
    }

    .project-card.size-wide {
        width: 100%;
        height: 180px;
    }

    .contact-links {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* 1 column */
@media (max-width: 500px) {
    .grid-sizer,
    .project-card,
    .project-card.size-small,
    .project-card.size-medium,
    .project-card.size-tall,
    .project-card.size-wide,
    .project-card.size-large {
        width: 100%;
        height: 200px;
    }
}