/* ==================================================
   THE BUILDING OF AYUSH
   Architectural Presentation & Engineering Portfolio
   Stylesheet
================================================== */

:root {
    /* Architectural Palette */
    --bg-dark: #0d0d0f;
    --bg-panel: rgba(13, 13, 15, 0.65);
    --text-main: #e8e8e6;
    --text-muted: #8c8c8a;
    --text-dark: #1a1a1c;
    
    /* Accents */
    --accent-amber: #c86b2e; /* Muted construction safety amber */
    --blueprint-blue: #162436;
    --blueprint-line: rgba(100, 160, 220, 0.4);
    
    /* Borders & UI */
    --border-thin: rgba(232, 232, 230, 0.12);
    --border-medium: rgba(232, 232, 230, 0.25);
    --ui-blur: blur(12px);
    
    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
    
    /* Layout */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --panel-width: 480px;
}

/* ==================================================
   RESET & BASE
================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-dark);
}

body {
    font-family: var(--font-body);
    color: var(--text-main);
    background-color: var(--bg-dark);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background-color: var(--accent-amber);
    color: var(--bg-dark);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 5px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
    border-left: 1px solid var(--border-thin);
}
::-webkit-scrollbar-thumb {
    background: var(--text-muted);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-amber);
}

.skip-link {
    position: fixed;
    top: -100px;
    left: 1rem;
    z-index: 99999;
    background: var(--accent-amber);
    color: var(--bg-dark);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-decoration: none;
    transition: top 0.3s ease;
}
.skip-link:focus {
    top: 1rem;
}

/* ==================================================
   CINEMATIC OVERLAYS (Grain & Vignette)
================================================== */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    box-shadow: inset 0 0 200px rgba(0, 0, 0, 0.8);
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    opacity: 0.25;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* 3D Viewport */
#webgl-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}
#webgl-container canvas {
    display: block;
    width: 100%;
    height: 100%;
    outline: none;
}

/* ==================================================
   LOADING SCREEN (Architectural Initialization)
================================================== */
#loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background-color: var(--bg-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.loader-content {
    width: 100%;
    max-width: 500px;
    padding: var(--space-md);
    position: relative;
    z-index: 10;
}

.loader-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 400;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
    color: var(--text-main);
}

.loader-subtitle {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--accent-amber);
    letter-spacing: 0.1em;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-thin);
}

.loader-diagnostics {
    margin-bottom: var(--space-md);
}

.loader-diagnostics p {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.load-status {
    color: var(--text-main);
}

.progress-track {
    width: 100%;
    height: 1px;
    background-color: var(--border-thin);
    position: relative;
}

#master-progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background-color: var(--text-main);
    transition: width 0.3s ease-out;
}

/* ==================================================
   ENGINEERING HUD
================================================== */
#engineering-hud {
    position: fixed;
    inset: 0;
    z-index: 50;
    pointer-events: none;
    display: grid;
    grid-template-rows: auto 1fr auto;
    grid-template-columns: auto 1fr auto;
    padding: var(--space-md);
}

/* Common HUD Typography */
.hud-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 0.25rem;
}
.hud-value {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.hud-value.large {
    font-size: 1.5rem;
    font-weight: 300;
}
.hud-value.highlight {
    color: var(--accent-amber);
}

/* HUD Top Bar */
.hud-top-bar {
    grid-column: 1 / -1;
    grid-row: 1;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-thin);
    pointer-events: auto;
}

.hud-meta {
    display: flex;
    gap: var(--space-lg);
}

.status-active {
    color: var(--accent-amber);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.status-active::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    background-color: var(--accent-amber);
    border-radius: 50%;
}

/* HUD Sidebars */
.hud-sidebar-left {
    grid-column: 1;
    grid-row: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-md);
    padding-right: var(--space-md);
}

.hud-sidebar-right {
    grid-column: 3;
    grid-row: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-end;
    gap: var(--space-sm);
    pointer-events: auto;
}

.text-right {
    text-align: right;
    width: 100%;
}

/* HUD Buttons */
.hud-btn {
    background: transparent;
    border: 1px solid var(--border-thin);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 0.75rem 1.25rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
    backdrop-filter: var(--ui-blur);
    -webkit-backdrop-filter: var(--ui-blur);
    width: 180px;
    text-align: right;
}
.hud-btn:hover, .hud-btn:focus-visible {
    color: var(--text-main);
    border-color: var(--border-medium);
}
.hud-btn.is-active {
    color: var(--accent-amber);
    border-color: var(--accent-amber);
}

/* Grid Coordinates (Bottom Left) */
#grid-coordinates {
    grid-column: 1;
    grid-row: 3;
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}
.coord-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* Camera Mode (Bottom Right) */
#camera-mode-indicator {
    grid-column: 3;
    grid-row: 3;
    text-align: right;
    align-self: flex-end;
    margin-bottom: 0;
}
#cam-state-text {
    color: var(--text-main);
}

/* Cinematic Crosshairs Overlay */
#engineering-hud::before,
#engineering-hud::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 1px solid var(--border-medium);
    pointer-events: none;
}
#engineering-hud::before {
    top: calc(50% - 10px);
    left: calc(50% - 10px);
    border-radius: 50%;
    border-color: rgba(255, 255, 255, 0.05);
}
#engineering-hud::after {
    top: 50%;
    left: 50%;
    width: 2px;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    transform: translate(-50%, -50%);
}

/* ==================================================
   NAVIGATION
================================================== */
#site-navigation {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 60;
    display: flex;
    gap: 1.5rem;
    pointer-events: auto;
}

.nav-track {
    width: 1px;
    background-color: var(--border-thin);
    position: relative;
    margin-top: 10px;
    margin-bottom: 10px;
}

#nav-progress-indicator {
    position: absolute;
    top: 0;
    left: -1px;
    width: 3px;
    height: 0%;
    background-color: var(--accent-amber);
    transition: height 0.1s linear;
}

.nav-chapters {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.nav-link {
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: color 0.3s ease;
    opacity: 0.6;
}

.nav-link:hover, .nav-link:focus-visible {
    color: var(--text-main);
    opacity: 1;
}

.nav-link.active {
    color: var(--text-main);
    opacity: 1;
}

.nav-num {
    font-size: 0.55rem;
    opacity: 0.5;
}
.nav-link.active .nav-num {
    color: var(--accent-amber);
    opacity: 1;
}

/* ==================================================
   SCROLL TIMELINE & EDITORIAL PANELS
================================================== */
#scroll-timeline {
    position: relative;
    z-index: 10;
    pointer-events: none;
}

.timeline-chapter {
    min-height: 150vh; 
    display: flex;
    align-items: center;
    padding: 0 12vw;
    width: 100%;
}

.timeline-chapter:nth-child(even) {
    justify-content: flex-end;
}

.transition-chapter {
    min-height: 100vh;
}

.editorial-panel {
    pointer-events: auto;
    width: 100%;
    max-width: var(--panel-width);
    background: var(--bg-panel);
    backdrop-filter: var(--ui-blur);
    -webkit-backdrop-filter: var(--ui-blur);
    border: 1px solid var(--border-thin);
    padding: var(--space-md) var(--space-lg);
    position: relative;
}

.panel-header {
    border-bottom: 1px solid var(--border-thin);
    padding-bottom: var(--space-sm);
    margin-bottom: var(--space-md);
}

.phase-id {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--accent-amber);
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 0.5rem;
}

.phase-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-main);
    letter-spacing: 0.02em;
}

.editorial-panel p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.hero-panel {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: none;
    padding: 0;
    max-width: 600px;
}
.hero-panel .panel-header {
    border-bottom: none;
}
.hero-panel .project-title {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 400;
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    color: var(--text-main);
}
.hero-panel .project-subtitle {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}
.hero-panel .project-brief {
    font-size: 1.1rem;
    color: var(--text-main);
    max-width: 450px;
}

.technical-data-block {
    margin-bottom: var(--space-md);
}
.data-heading {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.data-list {
    list-style: none;
}
.data-list li {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-thin);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}
.data-list li:last-child {
    border-bottom: none;
}
.data-key {
    color: var(--text-muted);
}
.data-val {
    color: var(--text-main);
    text-align: right;
}

.data-tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.data-tags li {
    border: 1px solid var(--border-thin);
    padding: 0.4rem 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-main);
    background: rgba(255,255,255,0.02);
}
.large-tags li {
    font-size: 0.8rem;
    padding: 0.5rem 1rem;
    border-color: var(--border-medium);
}

.technical-bar-chart {
    list-style: none;
    margin-top: var(--space-sm);
}
.technical-bar-chart li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-thin);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
}
.technical-bar-chart li::before {
    content: '';
    display: inline-block;
    width: 12px;
    height: 1px;
    background-color: var(--accent-amber);
    margin-right: 1rem;
}

.project-card {
    margin-bottom: var(--space-md);
}
.project-name {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 0.25rem;
    color: var(--text-main);
}
.project-role {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-amber);
    margin-bottom: 1rem;
}
.project-details {
    list-style: none;
}
.project-details li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}
.project-details li::before {
    content: '+';
    position: absolute;
    left: 0;
    top: 0;
    font-family: var(--font-mono);
    color: var(--border-medium);
}

.highlight-card .project-name {
    color: var(--text-main);
    letter-spacing: 0.05em;
}
.specs-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-top: 0.5rem;
}
.specs-list li {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    border: 1px solid var(--border-thin);
    padding: 0.5rem;
}

.commendation-list {
    list-style: none;
}
.commendation-list li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-thin);
}
.award-title {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--text-main);
    margin-bottom: 0.25rem;
}
.award-desc {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.handover-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 400;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}
.handover-desc {
    margin-bottom: var(--space-md) !important;
}

.contact-card {
    border-top: 1px solid var(--border-thin);
    padding-top: var(--space-md);
}
.contact-heading {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}
.contact-info {
    font-style: normal;
    margin-bottom: var(--space-md);
}
.contact-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-thin);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}
.contact-method {
    color: var(--text-muted);
}
.contact-detail {
    color: var(--text-main);
    font-weight: 400;
    text-align: right;
}
.contact-detail.link {
    text-decoration: none;
    transition: color 0.3s ease;
}
.contact-detail.link:hover {
    color: var(--accent-amber);
}

.primary-btn {
    width: 100%;
    background: transparent;
    border: 1px solid var(--text-main);
    color: var(--text-main);
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all 0.3s ease;
}
.primary-btn:hover, .primary-btn:focus-visible {
    background: var(--text-main);
    color: var(--bg-dark);
}

/* ==================================================
   BLUEPRINT MODE OVERRIDES
================================================== */
body.blueprint-mode {
    --bg-dark: var(--blueprint-blue);
    --bg-panel: rgba(22, 36, 54, 0.75);
    --border-thin: var(--blueprint-line);
    --border-medium: rgba(100, 160, 220, 0.8);
    --text-main: #e0f0ff;
    --text-muted: #8ab4f8;
    --accent-amber: #64ffda; /* Tech cyan for blueprint */
}

body.blueprint-mode .editorial-panel {
    box-shadow: 0 0 0 1px var(--blueprint-line);
}
body.blueprint-mode .hud-btn.is-active {
    color: var(--bg-dark);
    background-color: var(--accent-amber);
    border-color: var(--accent-amber);
}

/* ==================================================
   RESPONSIVE DESIGN (Mobile / Tablet)
================================================== */
@media (max-width: 1024px) {
    .timeline-chapter {
        padding: 0 5vw;
    }
    #site-navigation {
        right: 1rem;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .hud-top-bar {
        flex-direction: column;
        gap: 1rem;
    }
    .hud-meta {
        gap: 1rem;
        flex-wrap: wrap;
    }
    .hud-sidebar-right, #grid-coordinates {
        display: none; 
    }
    .hud-sidebar-left {
        padding-right: 0;
        margin-top: 1rem;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    #site-navigation {
        top: auto;
        bottom: 0;
        right: 0;
        left: 0;
        transform: none;
        background: var(--bg-panel);
        backdrop-filter: var(--ui-blur);
        -webkit-backdrop-filter: var(--ui-blur);
        border-top: 1px solid var(--border-thin);
        padding: 0.5rem 1rem;
        overflow-x: auto;
    }
    .nav-track {
        display: none;
    }
    .nav-chapters {
        flex-direction: row;
        gap: 1.5rem;
    }
    .nav-link {
        white-space: nowrap;
        padding: 0.5rem 0;
    }
    
    .timeline-chapter {
        min-height: 120vh;
        align-items: flex-start;
        padding-top: 25vh;
    }
    .editorial-panel {
        max-width: 100%;
        padding: var(--space-md);
    }
    .hero-panel .project-title {
        font-size: 3rem;
    }
}

/* ==================================================
   ACCESSIBILITY: REDUCED MOTION
================================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}