/* --- Base Variables & Reset --- */
:root {
    --primary-font: 'Newsreader', serif;
    --secondary-font: 'Instrument Serif', serif;
    --text-color: #333333;
    --section-bg: #ebe5d5;
    --header-bg: #ffffff;
    --header-text: #1d2631;
    --step-bg: #2c5aa0;
    --step-text: #ffffff;
    --page-bg: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--primary-font);
    background-color: var(--page-bg);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

/* --- Header & Nav --- */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 4vw;
    background-color: var(--header-bg);
    color: var(--header-text);
    position: relative;
    width: 100%;
    z-index: 100;
    border-bottom: 1px solid #e0e0e0;
}

.logo a {
    font-family: var(--secondary-font);
    font-size: 1.5rem;
    letter-spacing: 0.5px;
}

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

.desktop-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.desktop-nav a:hover,
.desktop-nav a.active {
    opacity: 0.6;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background-color: var(--header-text);
}

/* --- Project Hero --- */
.project-hero {
    position: relative;
    width: 100%;
    height: 80vh;
    min-height: 600px;
    overflow: hidden;
}

.project-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-title {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 3rem 4vw;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: white;
}

.project-title h1 {
    font-family: var(--secondary-font);
    font-size: 4rem;
    font-weight: normal;
}

.project-title h2 {
    font-family: var(--secondary-font);
    font-size: 2.5rem;
    font-weight: normal;
    margin-top: 1rem;
}

/* --- Project Section --- */
.portfolio-project {
    width: 100%;
    background-color: var(--page-bg);
    padding: 2rem 4vw;
}

.project-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    padding: 2rem;
    background-color: var(--section-bg);
    border-radius: 12px;
    max-width: 1400px;
    margin: 0 auto 2rem auto;
}

.project-section.alternate {
    grid-auto-flow: dense;
}

.project-section.alternate .project-info {
    grid-column: 2;
}

.project-section.alternate .project-media {
    grid-column: 1;
}

/* Sections with blue background (for steps) - blue section inside the tan div */
.project-section.step-bg {
    background-color: var(--step-bg);
    color: var(--step-text);
}

.project-section.step-bg .project-info p {
    color: var(--step-text);
}

/* Approach section - 2 column layout with info on left, steps on right */
.project-section.approach-section {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
    align-items: flex-start;
}

.approach-info {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.approach-steps-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.step-card {
    padding: 2rem;
    border-radius: 8px;
    background-color: var(--step-bg);
    color: var(--step-text);
}

.step-card .project-info h3 {
    color: var(--step-text);
}

.step-card .project-info p {
    color: var(--step-text);
}

/* Strategy section with staggered images */
.project-section.strategy-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: flex-start;
}

.strategy-media {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    grid-auto-rows: auto;
}

.strategy-media img:nth-child(1) {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
}

.strategy-media img:nth-child(2) {
    grid-column: 2 / 3;
    grid-row: 1 / 3;
    margin-top: 2rem;
}

.strategy-media img:nth-child(3) {
    grid-column: 1 / 2;
    grid-row: 2 / 3;
    margin-top: 0;
}

.project-info h3 {
    font-family: var(--secondary-font);
    font-size: 1rem;
    font-weight: normal;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1rem;
    color: #666;
}

.project-section.step-bg .project-info h3 {
    color: var(--step-text);
}

.project-info p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.project-credits {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #666;
    font-style: italic;
}

.project-media img {
    width: 100%;
    height: auto;
    display: block;
}

/* --- Project Links --- */
.project-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    grid-column: 1 / -1;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border: 2px solid var(--text-color);
    background-color: transparent;
    color: var(--text-color);
    font-family: var(--primary-font);
    font-size: 0.95rem;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn:hover {
    background-color: var(--text-color);
    color: var(--section-bg);
}

.btn.outline {
    background-color: transparent;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .site-header {
        padding: 1.5rem 4vw;
    }

    .desktop-nav {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .project-hero {
        height: 50vh;
        min-height: 400px;
    }

    .project-title h1 {
        font-size: 2.5rem;
    }

    .project-title h2 {
        font-size: 1.5rem;
    }

    .portfolio-project {
        padding: 1rem 4vw;
    }

    .project-section {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .project-section.approach-section {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .approach-steps-container {
        gap: 1.5rem;
    }

    .project-section.strategy-section {
        grid-template-columns: 1fr;
    }

    .strategy-media {
        grid-template-columns: 1fr;
    }

    .strategy-media img:nth-child(2) {
        grid-column: 1 / 2;
        grid-row: auto;
        margin-top: 0;
    }

    .strategy-media img:nth-child(3) {
        grid-column: 1 / 2;
        grid-row: auto;
        margin-top: 0;
    }

    .project-section.alternate .project-info,
    .project-section.alternate .project-media {
        grid-column: auto;
    }
}