/* =========================================================================
   1. CORE DESIGN SYSTEM & NATIVE CSS VARIABLES
   ========================================================================= */
:root {
    --bg-base: #020617;
    --zenergy-black: #0a0705;
    --sky-glow: rgba(14, 165, 233, 0.1);
    --sky-border: rgba(14, 165, 233, 0.3);
    --sky-accent: #38bdf8;
    --text-main: #f8fafc;
    --text-muted: rgba(255, 255, 255, 0.6);
    --font-tech: 'Orbitron', monospace, sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
}

/* Reset & Base Layout */
*, ::before, ::after { 
    box-sizing: border-box; 
    margin: 0;
    padding: 0;
}

body { 
    font-family: var(--font-tech); 
    background-color: var(--bg-base); 
    color: var(--text-main); 
    min-height: 100vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow-x: hidden;
    user-select: none;
    -webkit-user-select: none;
    position: relative;
    -webkit-font-smoothing: antialiased;
} 

::selection {
    background-color: #ffffff;
    color: #000000;
}

/* Ambient Radial & Linear Overlays */
#page-bg-overlay {
    position: fixed; 
    inset: 0; 
    z-index: -1;
    background: radial-gradient(circle at 50% 49%, #1e3a8a 0%, #0f172a 50%, #020617 100%);
}

.ambient-gradient {
    position: fixed;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.4), transparent, rgba(0,0,0,0.4));
    z-index: 0;
    pointer-events: none;
}

/* Transition Utilities */
.img-glow-transition { 
    transition: opacity 0.5s ease-in-out; 
}

/* Header Control Bar */
.header-container {
    width: 100%;
    flex-shrink: 0;
    z-index: 50;
    background-color: rgba(8, 47, 73, 0.2);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 30px var(--sky-glow);
    display: flex;
    flex-direction: column;
}

.top-control-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    width: 100%;
    padding: 0 1rem;
    height: 3rem;
}

.btn-tele-glass {
    background-color: transparent;
    border: none;
    display: flex;
    align-items: center;
    color: #ffffff;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-tele-glass:hover {
    background-color: var(--sky-glow);
}

.btn-tele-glass:active {
    transform: scale(0.95);
}

.tele-btn-left {
    height: 100%;
    padding-left: 0.5rem;
    padding-right: 0.25rem;
    gap: 0.375rem;
    justify-content: flex-end;
}

.tele-btn-center {
    width: 3rem;
    height: 3rem;
    flex-shrink: 0;
    justify-content: center;
    border-left: 1px solid var(--sky-border);
    border-right: 1px solid var(--sky-border);
}

.tele-btn-right {
    height: 100%;
    padding-right: 0.5rem;
    padding-left: 0.25rem;
    gap: 0.375rem;
    justify-content: flex-start;
}

.icon-tele {
    width: 1rem;
    height: 1rem;
    fill: #ffffff;
    pointer-events: none;
    transition: fill 0.3s ease;
}

.btn-tele-glass:hover .icon-tele {
    fill: var(--sky-accent);
}

.sub-header-bar {
    width: 100%;
    border-top: 1px solid var(--sky-border);
    padding: 0.375rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Central Visualizer Layer */
.main-visualizer-container {
    flex: 1;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
}

#zenergy-pack-container {
    position: relative;
    width: 100%;
    max-width: 240px;
    aspect-ratio: 13 / 15;
    flex-shrink: 0;
    margin: 0 auto;
    filter: drop-shadow(0 40px 60px rgba(0,0,0,0.9));
}

.pack-viewport {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: transparent;
}

#zenergy-pack-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.vector-overlay-layer {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    z-index: 20;
    pointer-events: none;
}

.svg-target-reticle {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: rgba(255, 255, 255, 0.5);
    stroke-width: 1;
    transition: all 0.5s ease;
    transform-origin: center;
    transform: scale(1.2);
}

.svg-text-title {
    fill: #ffffff;
    font-size: 13px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    transition: all 0.5s ease;
}

.svg-text-desc {
    fill: var(--text-muted);
    font-size: 10px;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    transition: all 0.5s ease;
}

/* Product Spec Strip & Controls Grid */
.info-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: rgba(255, 255, 255, 0.9);
    font-size: 8px;
    letter-spacing: 0.25em;
    font-family: var(--font-tech);
    width: 100%;
    text-transform: uppercase;
    padding-top: 0.25rem;
    gap: 0.5rem;
}

.info-strip-content {
    width: 100%;
    border-bottom: 1px solid var(--sky-border);
    padding: 0.375rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.action-controls-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    border-bottom: 1px solid var(--sky-border);
    align-items: center;
    width: 100%;
    padding: 0 1rem;
    height: 3rem;
}

.icon-stroke {
    width: 1rem;
    height: 1rem;
    stroke: #ffffff;
    transition: stroke 0.3s ease;
}

.btn-tele-glass:hover .icon-stroke {
    stroke: var(--sky-accent);
}

/* Footer */
.footer-container {
    height: 50px;
    width: 100%;
    flex-shrink: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), rgba(0,0,0,0.3), transparent);
    backdrop-filter: blur(4px);
    z-index: 50;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-brand-text {
    font-size: 6px;
    letter-spacing: 0.35em;
    font-family: var(--font-tech);
    font-weight: 700;
    color: rgba(186, 230, 253, 0.4);
    text-transform: uppercase;
    transition: color 0.3s ease;
}

.footer-container:hover .footer-brand-text {
    color: rgba(125, 211, 252, 0.8);
}