/* ========================================================
   PARIVARTYA GUFTGOO - ARCHITECTURAL BLUEPRINT DESIGN
======================================================== */

:root {
    --bg: #f3f3ef;              /* Cream / grey-beige background color directly from PDF */
    --grid-line: #e3e3de;       /* Extremely subtle technical grid line */
    --card: #ffffff;            
    
    --text: #1a1a1a;            /* Heavy charcoal-black for clear hierarchy */
    --text-muted: #555555;      

    --primary: #d1351d;         /* Terracotta Rust-Red color matching the slides */
    --primary-light: #e3432b;
    --border-dark: #111111;     /* High-contrast solid borders */
    --border-light: #cccccc;

    --radius: 0px;              /* Pure 0px sharp corner aesthetic to match diagrams */
    --shadow: 4px 4px 0px rgba(0, 0, 0, 0.08);
}

/* ================================
   GLOBAL & GRAPHIC GRID LAYOUT
================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--bg);
    /* Creates the background guideline alignment grid seen in the slides */
    background-image: 
        linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
        linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
    background-size: 80px 80px;
    color: var(--text);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    position: relative;
    padding-bottom: 50px;
}

/* Vertical terracotta accent line running down behind content */
.accent-line {
    position: absolute;
    top: 0;
    left: 60px;
    width: 2px;
    height: 100%;
    background-color: var(--primary);
    opacity: 0.3;
    z-index: -2;
}

@media(max-width: 1200px) {
    .accent-line {
        display: none;
    }
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 30px 20px;

}

/* ========================================
FIXED / STICKY HEADER (Will not move)
======================================== */

.app-header {
    position: sticky;
    top: 0;
    max-width: 1060px;
    margin: auto;
    margin-top: 10px;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 40px;
    background-color: #ffffff;
    border: 2px solid var(--border-dark);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
    /* margin-bottom: 50px; */
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.app-header img {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
}

.badge {
    margin-left: 10px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    padding: 3px 8px;
    background: var(--border-dark);
    color: #ffffff;
    border-radius: 2px;
}

.donate-btn {
    color: var(--primary) !important;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.95rem;
    border: 1px solid var(--primary);
    padding: 6px 16px;
    transition: all 0.2s ease;
}

.donate-btn:hover {
    background: var(--primary);
    color: #ffffff !important;
}

/* ================================
   CARDS & SECTIONS
================================ */

.card {
    background: var(--card);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius);
    padding: 50px;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}

/* ========================================
   SLIDE 1: Hero Layout Adaptation
======================================== */

.hero-slide {
    text-align: left;
    padding: 60px;
    position: relative;
    border: 1px solid var(--border-dark);
}

.hero-pipeline-wrapper {
    position: relative;
    padding-left: 30px;
    margin-bottom: 40px;
}

/* Red structural pipe flanking the Title Block */
.hero-red-line {
    position: absolute;
    left: 0;
    top: 0;
    width: 3px;
    height: 100%;
    background-color: var(--primary);
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.05;
    color: var(--text);
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-divider {
    border: 0;
    border-top: 1px solid var(--border-dark);
    margin: 20px 0;
    width: 100%;
    opacity: 0.8;
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
}

.hero-tagline {
    font-size: 1.2rem;
    color: var(--text-muted);
}

/* ========================================
   SLIDE IMAGES (P2P Diagram Displays)
======================================== */

.slide-image {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 30px auto;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.slide-image-inline {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
}

.slide-section {
    text-align: center;
}

.slide-section h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

/* ================================
   BUTTONS (FLAT CHUNKY BLOCK STYLE)
================================ */

.cta-buttons {
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 40px;
}

.cta-buttons.bottom-cta {
    justify-content: center;
}

.button-primary {
    text-decoration: none;
    padding: 16px 28px;
    background: var(--primary);
    color: #ffffff;
    font-weight: 700;
    font-size: 0.9rem;
    border: 1px solid var(--border-dark);
    box-shadow: 3px 3px 0px var(--border-dark);
    transition: all 0.15s ease-in-out;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.button-primary:hover {
    transform: translate(-1px, -1px);
    box-shadow: 4px 4px 0px var(--border-dark);
    background: var(--primary-light);
}

.button-primary:active {
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0px var(--border-dark);
}

.button-primary.download {
    background: #ffffff;
    color: var(--text);
}

.button-primary.download:hover {
    background: var(--bg);
}

.small-text {
    margin-top: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ========================================
   SLIDE 4: COMPARISON TABLE
======================================== */

.table-container {
    overflow-x: auto;
    margin-top: 30px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.comparison-table th, 
.comparison-table td {
    padding: 18px 24px;
    border: 1px solid var(--border-light);
}

.comparison-table th {
    background-color: #fbfbf9;
    font-weight: 700;
    color: #777777;
}

.comparison-table td.table-metric {
    font-weight: 700;
    color: var(--text);
}

/* Specific red highlighting for Guftgoo column matching Slide 4 */
.comparison-table .guftgoo-col {
    background-color: #ffffff;
    border-left: 3px solid var(--primary);
}

.comparison-table td.highlight-text {
    font-weight: 700;
    color: var(--primary);
}

/* ========================================
   SLIDE 5 & 6 Column and split panels
======================================== */

.two-column-features {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    text-align: left;
    border-top: 1px solid var(--border-light);
    padding-top: 30px;
}

.feature-column {
    flex: 1;
}

.feature-column h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
}

.feature-column p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.split-info-box {
    margin-top: 40px;
    text-align: left;
    border-top: 1px solid var(--border-light);
    padding-top: 20px;
}

.info-row {
    padding: 15px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    font-size: 0.95rem;
}

/* ========================================
   SLIDE 7: engineered everywhere layout
======================================== */

.everywhere-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: center;
    text-align: left;
}

.everywhere-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.info-block h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

/* ========================================
   SLIDE 8: Handshake Step Layout
======================================== */

.steps-container {
    display: flex;
    gap: 20px;
    align-items: center;
    margin-top: 40px;
    text-align: left;
}

.step {
    flex: 1;
    background: #fbfbf9;
    border: 1px solid var(--border-light);
    padding: 30px 20px;
}

.step h4 {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.step p {
    font-size: 0.85rem;
}

.step-number {
    width: 45px;
    height: 45px;
    margin: 0 auto 16px 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    font-weight: 800;
    background: var(--primary);
    color: #ffffff;
    border: 1px solid var(--border-dark);
}

.step-arrow {
    font-size: 1.2rem;
    color: var(--primary);
}

/* ================================
   FOOTER
================================ */

.main-footer {
    text-align: center;
    margin-top: 50px;
}

.copyright-text {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========================================
   RESPONSIVE LAYOUT SCALING
======================================== */

@media(max-width: 960px) {
    .everywhere-grid {
        grid-template-columns: 1fr;
    }

    .steps-container {
        flex-direction: column;
        gap: 20px;
    }

    .step-arrow {
        transform: rotate(90deg);
        margin: 5px 0;
    }

    .hero-title {
        font-size: 3rem;
    }

    .card {
        padding: 30px 20px;
    }

    .two-column-features {
        flex-direction: column;
        gap: 30px;
    }
}

@media(max-width: 640px) {
    .hero-title {
        font-size: 2.2rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .button-primary {
        width: 100%;
        text-align: center;
    }

    .app-header {
        padding: 10px 20px;
    }
}