/* ==========================================================================
   1. CSS VARIABLES & THEME CONFIGURATION
   ========================================================================== */
:root[data-theme="dark"] {
    --jako-bg: #0a0a0a;
    --jako-text: #ffffff;
    --jako-border: rgba(255, 255, 255, 0.12);
    --jako-glass: rgba(20, 20, 20, 0.65);
    --jako-led: rgba(255, 255, 255, 0.6);
    --gradient-start: rgba(255, 255, 255, 0.05);
    --gradient-mid: rgba(10, 10, 10, 0.85);
    --gradient-end: #0a0a0a;
    --icon-hover: #ffffff;
    --aperture-deg: 0deg;
}

:root[data-theme="light"] {
    --jako-bg: #f4f5f7;
    --jako-text: #0d0d0d;
    --jako-border: rgba(0, 0, 0, 0.12);
    --jako-glass: rgba(255, 255, 255, 0.65);
    --jako-led: rgba(0, 0, 0, 0.3);
    --gradient-start: rgba(0, 0, 0, 0.02);
    --gradient-mid: rgba(244, 245, 247, 0.85);
    --gradient-end: #f4f5f7;
    --icon-hover: #555555;
    --aperture-deg: 180deg;
}

/* ==========================================================================
   2. GLOBAL RESET & BASE STYLES
   ========================================================================== */
*, ::before, ::after { 
    box-sizing: border-box; 
    margin: 0;
    padding: 0;
    font-family: inherit;
}

html, body {
    height: 100dvh;
    overflow: hidden;
}

body { 
    font-family: 'Orbitron', monospace, sans-serif; 
    background-color: var(--jako-bg); 
    color: var(--jako-text); 
    width: 100%;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    position: relative;
    letter-spacing: 0.05em;  
    overscroll-behavior: none;
    transition: background-color 0.5s ease, color 0.5s ease;
} 

::selection {
    background-color: var(--jako-text);
    color: var(--jako-bg);
}

button, span, div { -webkit-tap-highlight-color: transparent; }

/* Background ambient lighting overlays */
#page-bg-overlay, .ambient-gradient {
    position: fixed;
    inset: 0;
}

#page-bg-overlay {
    background: radial-gradient(circle at 50% 30%, var(--gradient-start) 0%, var(--gradient-mid) 65%, var(--gradient-end) 100%);
    z-index: -1;
    transform: translateZ(0);
    will-change: background;
    transition: background 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.ambient-gradient {
    background: linear-gradient(to bottom, rgba(0,0,0,0.15), transparent, rgba(0,0,0,0.15));
    z-index: 0;
    pointer-events: none;
}

/* Standardized SVG & Glass Buttons */
button {
    background-color: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--jako-text);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

button:hover { opacity: 0.8; }
button:active { transform: scale(0.92); }

.icon-stroke { 
    width: 1.2rem;
    height: 1.2rem;
    stroke: var(--jako-text);
    transition: stroke 0.3s ease;
}

button:hover .icon-stroke { stroke: var(--icon-hover); }

/* Transitions */
.img-glow-transition, .info-strip, .header-style-bar, #fotopanel-pack-container, .panel-back-view {
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), transform 0.5s cubic-bezier(0.4, 0, 0.2, 1), filter 0.5s ease, border-color 0.5s ease;
}

/* ==========================================================================
   3. UNIFIED STRUCTURE STYLES
   ========================================================================== */

/* HEADER & ACTION BARS */
.header-style-bar {
    height: 8dvh;
    max-height: 8dvh;
    flex-shrink: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 100%;
    padding: 0 1rem;
    position: relative;
    z-index: 100;
    border-top: 1px solid var(--jako-border);
    border-bottom: 1px solid var(--jako-border);
    background: var(--jako-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    gap: 0.5rem;
}

header.header-style-bar {
    height: 10dvh;
    max-height: 10dvh;
    border-top: none;
    justify-content: space-between;
}

.btn-reset-text {
    width: auto;
    padding: 0 0.5rem;
    gap: 0.5rem;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.25em;
}

.btn-control-action {
    width: 3.5rem;
    height: 100%;
}

/* INDEPENDENT STATIC BAR STYLES FOR VISION DOCUMENTATION */
.block-4-static {
    height: 4.5dvh;
    width: 100%;
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    background: var(--jako-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--jako-border);
    border-bottom: 1px solid var(--jako-border);
    padding: 1.2rem;
    font-size: 9px;
    letter-spacing: 0.05em;
}

.block-4-btn {
    height: 100%;
    padding: 0 1rem;
    border-left: 1px solid var(--jako-border);
    border-right: 1px solid var(--jako-border);
}

/* INFO STRIPS */
.info-style-strip {
    height: 5dvh;
    max-height: 5dvh;
    flex-shrink: 0;
    width: 100%;
    color: var(--jako-text);
    font-size: 10px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
}

.info-strip-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    white-space: nowrap;
}

.info-separator {
    opacity: 0.4;
    font-weight: 300;
}

.tele-value { 
    color: var(--jako-text); 
    text-shadow: 0 0 8px var(--jako-led);
    transform: translateZ(0);
    transition: color 0.5s ease, text-shadow 0.5s ease;
}

/* MAIN VISUALIZER */
.main-style-visualizer {
    height: 58dvh;
    max-height: 58dvh;
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    padding: 0.5rem 1rem 1.5rem 1rem;
    position: relative;
    overflow: hidden;
    margin: 0 auto;
    flex-shrink: 0;
}

#fotopanel-pack-container {
    position: relative;
    width: 100%;
    max-width: 380px;
    max-height: 48dvh;
    aspect-ratio: 1 / 1;
    flex-shrink: 0;
    margin: 0 auto;
    cursor: pointer;
    filter: drop-shadow(0 30px 50px rgba(0,0,0,0.5));
    transform-origin: bottom center;
}

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

.user-surface-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform-origin: center center;
    will-change: transform;
    transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

.panel-back-view {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 20;
    opacity: 0;
    pointer-events: none;
}

.panel-back-view.active {
    opacity: 1;
    pointer-events: auto;
}

.grayscale-filter {
    filter: grayscale(100%);
}

/* GLASS APERTURE THEME SWITCH */
.glass-aperture-dial {
    width: 28px;
    height: 28px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--jako-glass);
    border: 1px solid var(--jako-border);
    backdrop-filter: blur(6px);
    box-shadow: inset 0 0 4px var(--jako-border), 0 0 8px rgba(0,0,0,0.2);
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    transform: rotate(var(--aperture-deg));
}

.aperture-ticks {
    position: absolute;
    inset: 1px;
    border-radius: 50%;
    background: repeating-conic-gradient(
        from 0deg,
        var(--jako-text) 0deg 2deg,
        transparent 2deg 30deg
    );
    opacity: 0.35;
    mask-image: radial-gradient(circle, transparent 55%, black 60%);
    -webkit-mask-image: radial-gradient(circle, transparent 55%, black 60%);
}

.aperture-core {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--jako-text);
    box-shadow: 0 0 6px var(--jako-text);
}

/* VISION SCROLL VIEWPORT RULES */
.vision-scroll-viewport {
    height: 58dvh;
    max-height: 58dvh;
    width: 100%;
    max-width: 800px;
    overflow-y: auto;
    padding: 1.5rem 1rem;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    flex-shrink: 0;
}

.vision-card {
    background: var(--jako-glass);
    border: 1px solid var(--jako-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1.2rem;
    border-radius: 4px;
}

.vision-card h2 {
    font-size: 11px;
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--jako-border);
    padding-bottom: 0.5rem;
    text-transform: uppercase;
}

.checklist-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    font-size: 10px;
    letter-spacing: 0.05em;
}

.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    line-height: 1.4;
}

.checklist-item input[type="checkbox"] {
    accent-color: var(--jako-text);
    margin-top: 0.15rem;
}

/* RESPONSIVE LAYOUT ADJUSTMENTS */
@media (max-height: 667px) {
    .btn-reset-text { font-size: 11px; }
    .icon-stroke { width: 1rem; height: 1rem; }
    .info-style-strip { font-size: 8px; }
    #fotopanel-pack-container { max-height: 40dvh; }
    .btn-control-action { width: 2.5rem; }
}