/* Location: audiophileengineer/styles.css */

:root {
    --phi: 1.6180339887;
    --phi-inv: 0.6180339887;

    --base-unit: clamp(7px, 0.8vw + 4px, 10px);
    
    --scale-1: calc(var(--base-unit) * var(--phi));
    --scale-2: calc(var(--scale-1) * var(--phi));
    --scale-3: calc(var(--scale-2) * var(--phi));
    --scale-4: calc(var(--scale-3) * var(--phi));
    --scale-5: calc(var(--scale-4) * var(--phi));

    --bg-color: #030303;
    --surface-color: rgba(10, 10, 10, 0.85);
    --text-primary: #f0f0f0;
    --text-dim: #888888;
    --accent-color: #3b82f6;
    --accent-dim: rgba(59, 130, 246, 0.2);

    --font-mono: ui-monospace, 'SF Mono', Menlo, Monaco, monospace;
    --font-sans: system-ui, -apple-system, sans-serif;

    --player-height: var(--scale-5);
}

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

html {
    scroll-behavior: smooth;
    /* ERADICATES ELASTIC COMPOSITOR DISTORTION */
    overscroll-behavior-y: none; 
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overscroll-behavior-y: none;
}

p {
    line-height: var(--phi);
    letter-spacing: 0.02em;
}

/* =========================================
   KINETIC VIEWPORT LOGIC
========================================= */

.viewport-reveal {
    opacity: 0;
    transform: translateY(var(--scale-2));
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    /* HARDWARE ACCELERATION: Force GPU layer allocation prior to intersection */
    will-change: opacity, transform;
    backface-visibility: hidden;
}

.viewport-active {
    opacity: 1;
    transform: translateY(0);
}

@keyframes pulse-idle {
    0% { opacity: 0.5; }
    50% { opacity: 0.8; }
    100% { opacity: 0.5; }
}

.sys-idle-pulse {
    animation: pulse-idle 4s ease-in-out infinite;
}

#visualizer-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100lvh;
    z-index: -2;
    background: #000;
    contain: strict;
    pointer-events: none; 
}

.overlay-gradient {
    /* DEPRECATED: VIGNETTES MUST BE CALCULATED IN main.frag TO PREVENT COMPOSITOR OVERDRAW */
    display: none; 
}

/* =========================================
   HEADER MATRIX (SALES OPTIMIZED)
========================================= */

.top-nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--scale-2) var(--scale-4);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(3, 3, 3, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    gap: var(--scale-2);
    /* HARDWARE LOCK: Quarantines the convolution matrix to a persistent GPU tile */
    will-change: transform, backdrop-filter;
}

.nav-hidden {
    transform: translateY(-100%);
}

.nav-top-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    gap: var(--scale-2);
}

.brand-moniker {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 3.5vw, var(--scale-2));
    letter-spacing: 0.15em;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-action {
    background: var(--accent-color);
    border: 1px solid var(--accent-color);
    color: #fff;
    font-family: var(--font-mono);
    font-size: clamp(0.75rem, 2vw, 0.85rem);
    font-weight: 700;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    letter-spacing: 0.1em;
    white-space: nowrap;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.nav-action:hover {
    background: #60a5fa;
    border-color: #60a5fa;
    color: #fff;
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
    transform: translateY(-2px);
}

.nav-action:active {
    transform: translateY(0);
}

.nav-links-row {
    display: flex;
    width: 100%;
    gap: var(--scale-3);
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
}

.nav-links-row::-webkit-scrollbar { display: none; }

.nav-link {
    color: var(--text-dim); 
    text-decoration: none; 
    font-family: var(--font-mono); 
    font-size: 0.8rem; 
    letter-spacing: 0.1em; 
    transition: color 0.2s ease, text-shadow 0.2s ease;
    white-space: nowrap;
    text-transform: uppercase;
}

.nav-link:hover, .nav-link:active {
    color: var(--text-primary);
    text-shadow: 0 0 8px rgba(255,255,255,0.4);
}

/* =========================================
   STRUCTURAL GRID & HERO SECTION
========================================= */

#portfolio-container {
    padding-top: calc(var(--scale-5) * 3.5);
    padding-bottom: calc(var(--player-height) + var(--scale-4));
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: var(--scale-5);
    padding-inline: var(--scale-4);
    max-width: 1600px;
    margin: 0 auto;
}

.section-header {
    font-size: clamp(1.1rem, 2.5vw, var(--scale-2));
    font-family: var(--font-mono);
    margin-bottom: var(--scale-2);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: var(--scale-1);
    color: var(--text-primary);
    letter-spacing: 0.05em;
}

.hero-block {
    display: flex;
    flex-direction: column;
    gap: var(--scale-1);
}

.hero-label {
    font-family: var(--font-mono);
    color: var(--accent-color);
    font-size: clamp(0.75rem, 2vw, 0.9rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.hero-title {
    font-size: clamp(1.75rem, 5.5vw, 3.5rem);
    font-family: var(--font-sans);
    font-weight: 800;
    color: #fff;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--scale-1);
}

.hero-title span {
    color: var(--accent-color);
}

.hero-desc {
    font-size: clamp(1rem, 2vw, 1.2rem);
    line-height: 1.7;
    max-width: 800px;
    color: #a0a0a0;
}

/* =========================================
   TRI-TIER VAULT ARCHITECTURE
========================================= */

.carousel-matrix {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: var(--scale-3);
    padding-bottom: var(--scale-2);
    scrollbar-width: none; 
}
.carousel-matrix::-webkit-scrollbar { display: none; }

.carousel-node {
    flex: 0 0 80%;
    max-width: 600px;
    scroll-snap-align: center;
    position: relative;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: border-color 0.3s ease;
    /* OFFLOADS OFFSCREEN DOM COMPUTE */
    content-visibility: auto;
    contain-intrinsic-size: auto 300px;
}
.carousel-node:hover { border-color: var(--accent-color); }

.carousel-art {
    width: 100%;
    aspect-ratio: 1/1;
    object-fit: cover;
    filter: brightness(0.7);
    transition: filter 0.3s ease;
}
.carousel-node:hover .carousel-art { filter: brightness(1); }

.playlist-matrix {
    display: flex;
    flex-direction: column;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}
.playlist-node {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--scale-3);
    align-items: center;
    padding: var(--scale-2) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    transition: background 0.2s ease, padding-left 0.2s ease;
    /* OFFLOADS OFFSCREEN DOM COMPUTE */
    content-visibility: auto;
    contain-intrinsic-size: auto 70px;
}
.playlist-node:hover {
    background: linear-gradient(90deg, var(--accent-dim) 0%, transparent 100%);
    padding-left: var(--scale-2);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--scale-3);
}

.showcase-node {
    content-visibility: auto;
    contain-intrinsic-size: auto 350px;
}

/* =========================================
   DSP / SOFTWARE MATRIX & ACCORDION
========================================= */

.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: var(--scale-2);
    transition: border-color 0.3s ease;
    -webkit-tap-highlight-color: transparent;
}
.accordion-header:hover, .accordion-header:active {
    border-color: var(--accent-color);
}

.accordion-icon {
    font-family: var(--font-mono);
    font-size: var(--scale-3);
    color: var(--text-dim);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), color 0.3s ease;
    line-height: 1;
}
.accordion-header.active .accordion-icon {
    transform: rotate(45deg);
    color: var(--accent-color);
}

.matrix-wrapper {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.matrix-wrapper.open {
    grid-template-rows: 1fr;
}
.matrix-inner {
    overflow: hidden;
    opacity: 0;
    transform: translateY(calc(var(--scale-1) * -1));
    transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.matrix-wrapper.open .matrix-inner {
    opacity: 1;
    transform: translateY(0);
    padding-top: var(--scale-3);
}

.arsenal-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--scale-1);
}

.vendor-node {
    position: relative;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    padding: 0 var(--scale-3);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    overflow: hidden;
}
.vendor-node:hover {
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.02);
}

.vendor-node.touch-expanded {
    border-color: var(--accent-color);
    background: rgba(12, 12, 12, 0.95);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.8);
    margin: var(--scale-1) 0;
    z-index: 10;
}

.vendor-header {
    display: flex;
    align-items: center;
    gap: var(--scale-3);
    min-height: 56px; 
    transition: border-bottom 0.4s ease;
}
.vendor-node.touch-expanded .vendor-header {
    border-bottom: 1px solid var(--accent-dim);
}

.vendor-logo {
    width: 28px;
    height: 28px;
    object-fit: contain;
    filter: grayscale(100%) opacity(0.5);
    transition: filter 0.4s ease, transform 0.4s ease;
}
.vendor-node:hover .vendor-logo { filter: grayscale(50%) opacity(0.8); }
.vendor-node.touch-expanded .vendor-logo {
    filter: grayscale(0%) opacity(1);
    transform: scale(1.1);
}

/* PAINT PIPELINE OPTIMIZATION: Resolves missing image DOM pollution */
.vendor-logo-fallback {
    background-color: rgba(255, 255, 255, 0.02);
    border-radius: 2px;
    /* Disables the default browser 'broken image' icon styling */
    color: transparent !important; 
}

.vendor-name {
    font-family: var(--font-mono);
    font-size: var(--scale-1);
    color: var(--text-primary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    transition: color 0.3s ease;
}
.vendor-node.touch-expanded .vendor-name {
    color: var(--accent-color);
    font-weight: 600;
}

.vendor-count {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 8px;
    border-radius: 12px;
    transition: background 0.3s, color 0.3s;
}
.vendor-node.touch-expanded .vendor-count {
    background: var(--accent-dim);
    color: var(--accent-color);
}

.tool-list {
    list-style: none;
    max-height: 0;
    opacity: 0;
    overflow-y: auto;
    padding-left: var(--scale-4);
    padding-right: var(--scale-2);
    transition: max-height 0.5s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease, padding 0.4s ease;
    scrollbar-width: thin;
    scrollbar-color: #333 transparent;
    /* HARDWARE ACCELERATION: Hints GPU layer for the accordion dropdowns */
    will-change: max-height, opacity;
}
.vendor-node.touch-expanded .tool-list {
    max-height: 400px;
    opacity: 1;
    padding-top: var(--scale-2);
    padding-bottom: var(--scale-2);
}

.tool-item {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-dim);
    padding: 10px 0;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
    transition: color 0.2s, padding-left 0.2s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.tool-item:last-child { border-bottom: none; }

.tool-item:hover, .tool-item.active-tool {
    color: var(--text-primary);
    padding-left: var(--scale-1);
    border-left: 2px solid var(--accent-color);
    background: linear-gradient(90deg, var(--accent-dim) 0%, transparent 100%);
}

.tool-list::-webkit-scrollbar { width: 4px; }
.tool-list::-webkit-scrollbar-track { background: transparent; }
.tool-list::-webkit-scrollbar-thumb { background: #333; border-radius: 2px; }
.vendor-node.touch-expanded .tool-list::-webkit-scrollbar-thumb { background: var(--accent-color); }

/* =========================================
   POLYMORPHIC PLAYER MATRIX
========================================= */

#persistent-player {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--player-height);
    background: var(--surface-color);
    backdrop-filter: blur(calc(var(--scale-2) * 2));
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    transform: translateY(0);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    /* HARDWARE LOCK: Quarantines the convolution matrix */
    will-change: transform, backdrop-filter;
}

.player-hidden { transform: translateY(100%) !important; }

.player-layout {
    display: grid;
    grid-template-columns: var(--player-height) 1fr auto auto;
    align-items: center;
    flex: 1;
    gap: var(--scale-3);
    padding-right: var(--scale-4);
}

#player-art {
    width: var(--player-height);
    height: var(--player-height);
    object-fit: cover;
    background: #111;
    transition: filter 0.3s ease;
}

.track-data {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: calc(var(--scale-1) * var(--phi-inv));
}

#player-title {
    font-family: var(--font-sans);
    font-size: var(--scale-2);
    font-weight: 600;
    letter-spacing: 0.05em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#player-playlist {
    font-family: var(--font-mono);
    font-size: var(--scale-1);
    color: var(--accent-color);
    letter-spacing: 0.1em;
}

.ab-matrix {
    display: flex;
    align-items: center;
    gap: var(--scale-2);
    padding: var(--scale-1) var(--scale-3);
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 2px;
    transition: opacity 0.3s ease;
}

.ab-label {
    font-family: var(--font-mono);
    font-size: var(--scale-1);
    color: var(--text-dim);
    letter-spacing: 0.1em;
    transition: color 0.3s ease;
}

.label-active {
    color: var(--accent-color);
    text-shadow: 0 0 8px var(--accent-dim);
}

.ab-switch {
    position: relative;
    display: flex;
    align-items: center;
    width: calc(var(--scale-3) * 1.5);
    height: 44px;
}
.ab-switch input { opacity: 0; width: 0; height: 0; }

.ab-slider {
    position: absolute;
    cursor: pointer;
    left: 0; right: 0;
    height: var(--scale-2);
    background-color: #222;
    transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: var(--scale-2);
    border: 1px solid #444;
}
.ab-slider:before {
    position: absolute;
    content: "";
    height: calc(var(--scale-2) - 4px);
    width: calc(var(--scale-2) - 4px);
    left: 2px; bottom: 1px;
    background-color: var(--text-dim);
    transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 50%;
}
input:checked + .ab-slider {
    background-color: var(--accent-dim);
    border-color: var(--accent-color);
}
input:checked + .ab-slider:before {
    transform: translateX(calc(var(--scale-3) * 0.5 + 4px));
    background-color: var(--accent-color);
}

.playback-matrix { display: flex; align-items: center; }

.control-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    width: var(--scale-4);
    height: var(--scale-4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.1s, color 0.2s;
}
.control-btn:hover { color: var(--accent-color); }
.control-btn:active { transform: scale(0.9); }

.play-icon::before { content: '▶'; font-size: var(--scale-3); }
.pause-icon::before { content: '⏸'; font-size: var(--scale-3); }

.progress-bar-container {
    height: 24px;
    background: transparent;
    width: 100%;
    position: absolute;
    top: -12px;
    cursor: crosshair;
    display: flex;
    align-items: center;
}

.progress-track {
    width: 100%;
    height: 2px;
    background: #222;
    position: relative;
    transform-origin: center;
    transition: transform 0.2s ease;
    will-change: transform;
}
.progress-bar-container:hover .progress-track { 
    transform: scaleY(2); 
}

#progress-fill {
    height: 100%;
    background: var(--accent-color);
    width: 100%; 
    transform: scaleX(0); 
    transform-origin: left;
    transition: background 0.2s ease;
    box-shadow: 0 0 8px transparent;
    will-change: transform;
}
.progress-bar-container:hover #progress-fill {
    background: #60a5fa;
    box-shadow: 0 0 8px var(--accent-dim);
}

/* =========================================
   GLOBAL MODAL HOOK
========================================= */

.global-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(var(--scale-1));
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.global-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}
.global-modal-content {
    background: var(--surface-color);
    border: 1px solid var(--border-color, #333);
    padding: var(--scale-4);
    width: 90%;
    max-width: 600px;
    transform: translateY(var(--scale-3));
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: var(--scale-3);
    border-radius: 4px;
}
.global-modal-overlay.active .global-modal-content {
    transform: translateY(0);
    border-color: var(--accent-color);
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: var(--scale-2);
}
.modal-title {
    font-family: var(--font-mono);
    font-size: var(--scale-2);
    color: var(--accent-color);
    margin: 0;
}
.modal-close {
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: var(--scale-3);
    cursor: pointer;
    transition: color 0.2s ease, transform 0.2s ease;
}
.modal-close:hover {
    color: #ef4444;
    transform: scale(1.1);
}

/* =========================================
   MEDIA QUERIES (Mobile Breakpoint)
========================================= */

@media (max-width: 768px) {
    .top-nav {
        padding: var(--scale-2);
        gap: var(--scale-1);
    }
    
    .nav-top-row {
        gap: var(--scale-1);
    }
    
    .brand-moniker {
        font-size: 1.1rem; 
        letter-spacing: 0.1em; 
    }
    
    .nav-action {
        font-size: 0.75rem;
        padding: 8px 12px;
        letter-spacing: 0.05em;
    }
    
    .nav-links-row {
        border-top: 1px solid rgba(255,255,255,0.05);
        padding-top: var(--scale-1);
        padding-bottom: 2px;
    }
    
    .nav-link {
        font-size: 0.75rem; 
        letter-spacing: 0.05em;
    }
    
    #portfolio-container {
        padding-top: calc(var(--scale-5) * 2.8);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-desc {
        font-size: 0.95rem;
    }

    .player-layout {
        grid-template-columns: var(--player-height) 1fr auto;
        grid-template-rows: 1fr auto;
        padding-right: 0;
    }

    .ab-matrix {
        grid-column: 1 / -1;
        justify-content: center;
        border-top: 1px solid rgba(255, 255, 255, 0.05);
        border-left: none;
        border-right: none;
        border-bottom: none;
        background: transparent;
        padding: var(--scale-2) 0;
    }

    .playback-matrix {
        padding-right: var(--scale-3);
    }

    #persistent-player {
        height: calc(var(--player-height) + var(--scale-4) + var(--scale-2));
    }
}