:root {
    /* Mørk kamerainspireret farvepalet (Darkroom / Focus) */
    --bg-primary: #0a0b0d;      /* Dybsort kamerahus */
    --bg-secondary: #121316;    /* Mat struktur-plastik/metal */
    --bg-tertiary: #1a1b1f;     /* Lysere grå til overlays og indre kort */
    
    --text-primary: #f5f6f8;    /* Klart hvidt signal */
    --text-secondary: #a0a3ad;  /* Dæmpet metalgrå metadata */
    --text-muted: #62656e;      /* Mørkegrå linjer og inaktiv status */
    
    --accent-focus: #ff3b30;    /* Den klassiske røde kameraindikator */
    --accent-focus-rgb: 255, 59, 48;
    --border-color: #222429;    /* Fine samlinger og mekaniske riller */
    
    --glass-bg: rgba(18, 19, 22, 0.85);
    --glass-border: rgba(255, 255, 255, 0.08);
    --success: #30d158;         /* iOS grøn til korrekt fokusområde */
    --success-glow: rgba(48, 209, 88, 0.25);

    /* Skrifttyper */
    --font-editorial: 'Cormorant Garamond', Georgia, serif;
    --font-technical: 'Inter', system-ui, -apple-system, sans-serif;
    --font-data: 'Courier Prime', monospace;

    /* Spacing system (Base: 8px) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 64px;

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* Base resets & global styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-technical);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: var(--space-md);
}

#app {
    width: 100%;
    max-width: 640px;
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    padding: var(--space-lg);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6), 
                inset 0 1px 0 rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

/* Header layout & pulse dot badge */
header {
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--space-lg);
    position: relative;
}

.header-top {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-md);
}

.live-signal-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 4px;
    letter-spacing: 1.5px;
    background-color: var(--bg-primary);
    text-transform: uppercase;
}

.live-signal-badge .pulse-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent-focus);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 8px var(--accent-focus);
    animation: focal-pulse 2s infinite;
}

@keyframes focal-pulse {
    0% {
        transform: scale(0.9);
        opacity: 0.6;
        box-shadow: 0 0 0 0 rgba(255, 59, 48, 0.6);
    }
    50% {
        transform: scale(1.15);
        opacity: 1;
        box-shadow: 0 0 12px 3px rgba(255, 59, 48, 0.35);
    }
    100% {
        transform: scale(0.9);
        opacity: 0.6;
        box-shadow: 0 0 0 0 rgba(255, 59, 48, 0.6);
    }
}

/* Site branding header title */
.site-title {
    margin: 0;
    line-height: 1.1;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.site-title .title-main {
    font-family: var(--font-editorial);
    font-size: 2.2rem;
    font-weight: 300;
    letter-spacing: 0.5px;
    color: #eae5d9;
}

.site-title .title-accent {
    font-family: var(--font-technical);
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: #000000;
    background-color: #b5b5b5;
    border: none;
    padding: 4px 10px;
    border-radius: 0;
    text-transform: uppercase;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

header:hover .title-accent {
    color: #000000;
    background-color: #cfcfcf;
    transform: translateY(-1px);
}

.subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: var(--space-sm);
    font-family: var(--font-technical);
    letter-spacing: 0.5px;
}

main {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* Controls styling */
.controls-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: border-color 0.3s ease;
}

.control-group:focus-within {
    border-color: var(--text-muted);
}

.control-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--space-xs);
}

label {
    font-family: var(--font-technical);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
}

.value-display {
    font-family: var(--font-data);
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--accent-focus);
    text-shadow: 0 0 10px rgba(255, 59, 48, 0.25);
}

/* Custom Select styling */
.select-wrapper {
    position: relative;
    width: 100%;
}

.select-wrapper::after {
    content: '▼';
    font-size: 0.7rem;
    color: var(--text-secondary);
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    position: absolute;
    pointer-events: none;
}

select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-family: var(--font-technical);
    font-size: 0.88rem;
    width: 100%;
    cursor: pointer;
    transition: border-color 0.2s;
}

select:focus {
    outline: none;
    border-color: var(--text-muted);
}

/* Custom numbers inputs */
.number-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    max-width: 130px;
    margin-top: var(--space-xs);
}

input[type="number"] {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 40px 6px 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-data);
    font-size: 0.9rem;
    font-weight: 700;
    width: 100%;
    transition: border-color 0.2s;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-focus);
}

.input-unit {
    position: absolute;
    right: 12px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-family: var(--font-technical);
    text-transform: uppercase;
    font-weight: 700;
    pointer-events: none;
}

/* Remove spin buttons */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
input[type=number] {
    -moz-appearance: textfield;
}

/* Sliders wrapper */
.slider-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    padding: 6px 0;
}

/* Custom premium ranges */
input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
    cursor: pointer;
}

input[type=range]:focus {
    outline: none;
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: var(--bg-primary);
    border: 1.5px solid var(--border-color);
    border-radius: 100px;
}
input[type=range]::-moz-range-track {
    width: 100%;
    height: 4px;
    background: var(--bg-primary);
    border: 1.5px solid var(--border-color);
    border-radius: 100px;
}

/* Metallic Dial Knob Thumb */
input[type=range]::-webkit-slider-thumb {
    height: 22px;
    width: 22px;
    border-radius: 50%;
    background: radial-gradient(circle at 70% 30%, #3a3c42 0%, #1e1f24 100%);
    border: 2px solid var(--text-muted);
    cursor: grab;
    -webkit-appearance: none;
    margin-top: -10px; /* center on track */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transition: border-color 0.2s, background 0.2s, transform 0.1s;
}

input[type=range]::-moz-range-thumb {
    height: 22px;
    width: 22px;
    border-radius: 50%;
    background: radial-gradient(circle at 70% 30%, #3a3c42 0%, #1e1f24 100%);
    border: 2px solid var(--text-muted);
    cursor: grab;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transition: border-color 0.2s, transform 0.1s;
}

input[type=range]:hover::-webkit-slider-thumb {
    border-color: var(--accent-focus);
    background: radial-gradient(circle at 70% 30%, #4c4e56 0%, #292a30 100%);
}
input[type=range]:hover::-moz-range-thumb {
    border-color: var(--accent-focus);
    background: radial-gradient(circle at 70% 30%, #4c4e56 0%, #292a30 100%);
}

input[type=range]:active::-webkit-slider-thumb {
    cursor: grabbing;
    transform: scale(1.1);
    border-color: var(--accent-focus);
    box-shadow: 0 0 12px rgba(255, 59, 48, 0.4), 
                0 4px 8px rgba(0, 0, 0, 0.4);
}
input[type=range]:active::-moz-range-thumb {
    cursor: grabbing;
    transform: scale(1.1);
    border-color: var(--accent-focus);
    box-shadow: 0 0 12px rgba(255, 59, 48, 0.4), 
                0 4px 8px rgba(0, 0, 0, 0.4);
}

/* Results section styling */
.results-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.result-card {
    grid-column: 1 / -1;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.5);
}

.result-card h3 {
    color: var(--text-secondary);
    font-weight: 700;
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    font-size: 0.72rem;
    font-family: var(--font-technical);
    letter-spacing: 1.5px;
}

.value-large {
    font-size: 3.8rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    font-family: var(--font-data);
    letter-spacing: -2px;
    height: 1.1em;
    display: flex;
    align-items: center;
    justify-content: center;
}

.unit {
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    margin-top: var(--space-xs);
}

.secondary-results {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
}

.result-item {
    background: var(--bg-tertiary);
    padding: var(--space-md) var(--space-sm);
    border-radius: var(--radius-sm);
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.result-item .label {
    display: block;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.result-item .value {
    font-size: 1.05rem;
    font-weight: 700;
    font-family: var(--font-data);
    color: var(--text-primary);
    line-height: 1.25;
    height: 1.25em;
    display: block;
}

/* Premium electronic focal visualizer */
.visualization-container {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 0;
    height: 90px;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.5);
}

.viz-track {
    position: relative;
    width: 100%;
    height: 2px;
    border-top: 1.5px dashed var(--text-muted);
    margin: 0 var(--space-2xl); /* Safe zones for ends */
}

.viz-camera {
    position: absolute;
    left: -40px;
    top: -11px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 4px;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.viz-subject {
    position: absolute;
    top: -15px; /* Centered slightly above line */
    transform: translateX(-50%);
    transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    left: 0; /* Updated by JS */
    color: var(--accent-focus);
    display: flex;
    align-items: center;
    justify-content: center;
    filter: drop-shadow(0 0 4px var(--accent-focus));
    z-index: 4;
}

/* Glassmorphic laser depth-of-field focus bar */
.viz-zone {
    position: absolute;
    height: 10px;
    top: -5px;
    background: var(--success-glow);
    border: 1px solid var(--success);
    border-radius: 100px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 0 14px rgba(48, 209, 88, 0.35);
    z-index: 3;
}

/* Grid markings for that premium camera viewfinder LCD look */
.visualization-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(rgba(18, 19, 22, 0.08) 50%, rgba(0, 0, 0, 0.25) 50%),
                linear-gradient(90deg, rgba(255, 255, 255, 0.01) 1px, transparent 1px);
    background-size: 100% 4px, 20px 100%;
    pointer-events: none;
    z-index: 2;
}

/* Footer styling */
footer {
    text-align: center;
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: auto;
    font-family: var(--font-technical);
    letter-spacing: 1px;
    text-transform: uppercase;
    border-top: 1px solid var(--border-color);
    padding-top: var(--space-md);
}

/* Responsive adjustments */
@media (min-width: 600px) {
    #app {
        border-width: 1px;
        padding: var(--space-2xl);
    }
}

@media (max-width: 480px) {
    .site-title .title-main {
        font-size: 1.8rem;
    }
    .site-title .title-accent {
        font-size: 0.9rem;
    }
    .value-large {
        font-size: 3rem;
    }
    .secondary-results {
        grid-template-columns: 1fr;
        gap: var(--space-xs);
    }
}