/* ==========================================================================
   ppuzzl.org -- Bauhaus-Inspired Organizational Hub
   Colors: #FFFFFF, #1A1A1A, #D32F2F, #1565C0, #F9A825, #9E9E9E
   Font: Josefin Sans (geometric sans, Bauhaus-era)
   ========================================================================== */

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

:root {
    --white: #FFFFFF;
    --black: #1A1A1A;
    --red: #D32F2F;
    --blue: #1565C0;
    --yellow: #F9A825;
    --gray: #9E9E9E;
    --golden-ratio: 1.618;
    --spacing-unit: 1rem;
    --spacing-golden: calc(var(--spacing-unit) * 1.618);
    --spacing-golden-2: calc(var(--spacing-golden) * 1.618);
    --spacing-golden-3: calc(var(--spacing-golden-2) * 1.618);
}

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

body {
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 400;
    line-height: 1.65;
    color: var(--black);
    background-color: var(--white);
    overflow-x: hidden;
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: var(--white);
    border-bottom: 2px solid var(--black);
}

.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-unit) var(--spacing-golden-2);
}

.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.2em;
    color: var(--black);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-golden);
}

.nav-links a {
    text-decoration: none;
    color: var(--black);
    font-weight: 400;
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: color 0.2s ease;
}

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

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-golden-3) var(--spacing-golden-2);
    padding-top: calc(var(--spacing-golden-3) + 60px);
}

.hero-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-unit);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    align-items: center;
}

.hero-content {
    grid-column: 1 / 9;
    padding-left: calc(100% * 0.118);
}

.hero-title {
    font-size: clamp(2rem, 4.5vw, 4rem);
    font-weight: 700;
    letter-spacing: 0.15em;
    line-height: 1.1;
    margin-bottom: var(--spacing-golden);
}

.dot-org {
    color: var(--red);
}

.hero-subtitle {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.65;
    color: var(--gray);
    max-width: 38em;
}

.hero-shapes {
    grid-column: 9 / 13;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-golden);
}

.shape {
    transition: transform 0.3s ease;
}

.shape-circle {
    width: 80px;
    height: 80px;
    background-color: var(--red);
    border-radius: 50%;
}

.shape-square {
    width: 70px;
    height: 70px;
    background-color: var(--blue);
}

.shape-triangle {
    width: 0;
    height: 0;
    border-left: 45px solid transparent;
    border-right: 45px solid transparent;
    border-bottom: 78px solid var(--yellow);
}

/* ==========================================================================
   Sections (General)
   ========================================================================== */

.section {
    padding: var(--spacing-golden-3) var(--spacing-golden-2);
    max-width: 1400px;
    margin: 0 auto;
}

.section-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-golden);
    align-items: start;
}

.section-marker {
    grid-column: span 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-unit);
    cursor: pointer;
    padding: var(--spacing-golden) 0;
}

.marker-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gray);
}

.section-content {
    grid-column: span 8;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.6s ease, opacity 0.4s ease;
}

.section-content.expanded {
    max-height: 1200px;
    opacity: 1;
}

.section-content h2 {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-golden);
    color: var(--black);
}

.section-content p {
    font-size: 1rem;
    line-height: 1.65;
    margin-bottom: var(--spacing-unit);
    color: var(--black);
}

/* ==========================================================================
   Marker Shapes
   ========================================================================== */

.marker-shape {
    transition: transform 0.4s ease;
}

.circle-red {
    width: 60px;
    height: 60px;
    background-color: var(--red);
    border-radius: 50%;
}

.square-blue {
    width: 54px;
    height: 54px;
    background-color: var(--blue);
}

.triangle-yellow {
    width: 0;
    height: 0;
    border-left: 34px solid transparent;
    border-right: 34px solid transparent;
    border-bottom: 59px solid var(--yellow);
}

.square-red {
    width: 54px;
    height: 54px;
    background-color: var(--red);
}

.section-marker:hover .marker-shape {
    transform: scale(1.15);
}

.section-marker.active .marker-shape {
    transform: scale(1.3);
}

/* ==========================================================================
   About Section
   ========================================================================== */

.section-about {
    border-top: 1px solid #E0E0E0;
}

/* ==========================================================================
   Projects Section
   ========================================================================== */

.section-projects {
    border-top: 1px solid #E0E0E0;
}

.project-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-golden);
    margin-top: var(--spacing-golden);
}

.project-card {
    padding: var(--spacing-golden) var(--spacing-unit);
    position: relative;
}

.card-accent {
    width: 100%;
    height: 4px;
    margin-bottom: var(--spacing-unit);
}

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

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

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

.project-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.project-card p {
    font-size: 0.875rem;
    color: var(--gray);
    line-height: 1.65;
}

/* ==========================================================================
   Community Section
   ========================================================================== */

.section-community {
    border-top: 1px solid #E0E0E0;
}

.community-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-golden);
    margin-bottom: var(--spacing-golden);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.stat-number {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    color: var(--blue);
    letter-spacing: 0.02em;
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gray);
}

/* ==========================================================================
   Contribute Section
   ========================================================================== */

.section-contribute {
    border-top: 1px solid #E0E0E0;
}

.contribute-list {
    list-style: none;
    margin-top: var(--spacing-unit);
}

.contribute-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-unit);
    padding: calc(var(--spacing-unit) * 0.618) 0;
    font-size: 1rem;
    border-bottom: 1px solid #F0F0F0;
}

.list-marker {
    display: inline-block;
    width: 12px;
    height: 12px;
    flex-shrink: 0;
}

.list-marker-red {
    background-color: var(--red);
}

.list-marker-blue {
    background-color: var(--blue);
}

.list-marker-yellow {
    background-color: var(--yellow);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    margin-top: var(--spacing-golden-3);
    padding: 0 var(--spacing-golden-2) var(--spacing-golden-2);
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.footer-rule {
    height: 2px;
    background-color: var(--red);
    margin-bottom: var(--spacing-golden);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gray);
}

.footer-shapes {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 0.618);
}

.footer-circle {
    width: 10px;
    height: 10px;
    background-color: var(--red);
    border-radius: 50%;
    display: inline-block;
}

.footer-square {
    width: 10px;
    height: 10px;
    background-color: var(--blue);
    display: inline-block;
}

.footer-triangle {
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 10px solid var(--yellow);
    display: inline-block;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
    .hero-content {
        grid-column: 1 / 10;
        padding-left: 0;
    }

    .hero-shapes {
        grid-column: 10 / 13;
    }

    .section-marker {
        grid-column: span 3;
    }

    .section-content {
        grid-column: span 9;
    }

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

    .community-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-unit);
    }
}

@media (max-width: 600px) {
    .nav-bar {
        flex-direction: column;
        gap: var(--spacing-unit);
    }

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

    .hero-content {
        grid-column: 1 / -1;
        padding-left: 0;
    }

    .hero-shapes {
        grid-column: 1 / -1;
        flex-direction: row;
        justify-content: center;
    }

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

    .section-marker {
        grid-column: 1 / -1;
        flex-direction: row;
    }

    .section-content {
        grid-column: 1 / -1;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-unit);
        text-align: center;
    }
}