/* ==========================================================================
   PERSPEKTIF SUDUT - DESIGN SYSTEM & STYLE SHEET
   ========================================================================== */

/* 1. Global Reset & Variables */
:root {
    --bg-main: #060814;
    --bg-grad-1: #060814;
    --bg-grad-2: #0e1127;
    
    --card-bg: rgba(13, 17, 38, 0.55);
    --card-border: rgba(255, 255, 255, 0.06);
    --card-glow: rgba(0, 0, 0, 0.3);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --color-near: #06b6d4;      /* Cyan Elektrik */
    --color-near-rgb: 6, 182, 212;
    --color-far: #ec4899;       /* Pink/Magenta Elektrik */
    --color-far-rgb: 236, 72, 153;
    --color-observer: #f59e0b;  /* Emas/Amber */
    --color-observer-rgb: 245, 158, 11;
    
    --color-warning: #f59e0b;
    --color-success: #10b981;
    
    --font-heading: 'Space Grotesk', -apple-system, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-lg: 16px;
    --border-radius-md: 10px;
    --border-radius-sm: 6px;
}

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

html, body {
    width: 100%;
    min-height: 100vh;
    font-family: var(--font-body);
    background-color: var(--bg-main);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Starry Space Background Effect */
body {
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(236, 72, 153, 0.08) 0%, transparent 40%),
        linear-gradient(135deg, var(--bg-grad-1) 0%, var(--bg-grad-2) 100%);
    background-attachment: fixed;
}

/* Stars Overlay */
.stars-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.3;
    background-image: 
        radial-gradient(1px 1px at 20px 30px, #fff, rgba(0,0,0,0)),
        radial-gradient(1.5px 1.5px at 150px 100px, #fff, rgba(0,0,0,0)),
        radial-gradient(1px 1px at 300px 250px, #fff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 450px 80px, #fff, rgba(0,0,0,0)),
        radial-gradient(1px 1px at 600px 350px, #fff, rgba(0,0,0,0)),
        radial-gradient(1.5px 1.5px at 750px 220px, #fff, rgba(0,0,0,0)),
        radial-gradient(2.3px 2.3px at 900px 150px, #fff, rgba(0,0,0,0));
    background-repeat: repeat;
    background-size: 950px 400px;
}

/* 2. Container & Layout Grid */
.container {
    position: relative;
    z-index: 1;
    max-width: 1600px;
    width: 96%;
    margin: 0 auto;
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* Header */
.poster-header {
    text-align: center;
    margin-bottom: 10px;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--color-near);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.1);
    margin-bottom: 15px;
}

.poster-header h1 {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    background: linear-gradient(to right, #fff 30%, #e2e8f0 70%, var(--color-near) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
    text-transform: uppercase;
    text-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 700px;
    margin: 0 auto;
}

.header-divider {
    width: 120px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-far), var(--color-near));
    margin: 20px auto 0 auto;
    border-radius: 2px;
}

/* Main Grid Layout */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 24px;
}

.span-full {
    grid-column: span 12;
}

/* Responsive columns */
@media (min-width: 992px) {
    .observer-view-card {
        grid-column: span 5;
    }
    .controls-card {
        grid-column: span 7;
    }
    .math-card {
        grid-column: span 7;
    }
    .theory-card {
        grid-column: span 5;
    }
}
@media (max-width: 991px) {
    .observer-view-card, .controls-card, .math-card, .theory-card {
        grid-column: span 12;
    }
    .poster-header h1 {
        font-size: 2.5rem;
    }
}

/* 3. Cards / Glassmorphic Panels */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: 0 8px 32px var(--card-glow);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: transparent;
    transition: var(--transition-smooth);
}

.card:hover {
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* Custom top borders for visual grouping */
.visualizer-section:hover::before {
    background: linear-gradient(90deg, var(--color-far), var(--color-near));
}
.observer-view-card::before { background: var(--color-near); }
.controls-card::before { background: var(--text-muted); }
.math-card::before { background: var(--color-near); }
.theory-card::before { background: var(--color-far); }

.card-header {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.card-header h2 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.step-num {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    background: rgba(255,255,255,0.06);
    color: var(--text-secondary);
    padding: 3px 8px;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255,255,255,0.1);
}

.card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* 4. Interactive Ray-Tracing (SVG) Style */
.svg-container {
    background: rgba(5, 7, 20, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--border-radius-md);
    padding: 10px;
    overflow: hidden;
    position: relative;
}

#ray-diagram {
    width: 100%;
    height: auto;
    display: block;
}

/* Ray Lines */
.ray-line {
    stroke-width: 1.8px;
    stroke-dasharray: 2, 2;
    transition: var(--transition-smooth);
    opacity: 0.85;
}

.ray-near {
    stroke: var(--color-near);
    filter: drop-shadow(0 0 4px rgba(6, 182, 212, 0.6));
    animation: dash-near 30s linear infinite;
    stroke-dasharray: 6, 4;
}

.ray-far {
    stroke: var(--color-far);
    filter: drop-shadow(0 0 4px rgba(236, 72, 153, 0.6));
    animation: dash-far 30s linear infinite;
    stroke-dasharray: 6, 4;
}

@keyframes dash-near {
    to { stroke-dashoffset: -1000; }
}
@keyframes dash-far {
    to { stroke-dashoffset: -1000; }
}

/* Object Circles */
.obj-circle {
    stroke-width: 2px;
    fill-opacity: 0.25;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.obj-near {
    fill: var(--color-near);
    stroke: var(--color-near);
    filter: drop-shadow(0 0 10px rgba(6, 182, 212, 0.4));
}

.obj-near:hover {
    fill-opacity: 0.4;
    filter: drop-shadow(0 0 15px rgba(6, 182, 212, 0.6));
}

.obj-far {
    fill: var(--color-far);
    stroke: var(--color-far);
    filter: drop-shadow(0 0 10px rgba(236, 72, 153, 0.4));
}

.obj-far:hover {
    fill-opacity: 0.4;
    filter: drop-shadow(0 0 15px rgba(236, 72, 153, 0.6));
}

.obj-observer {
    fill: var(--color-observer);
    stroke: #ffffff;
    stroke-width: 1.5px;
    transition: var(--transition-smooth);
}

/* SVG Text Labels */
.svg-label {
    fill: var(--text-primary);
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 500;
    text-anchor: middle;
    letter-spacing: 0.5px;
}

.label-near { fill: var(--color-near); }
.label-far { fill: var(--color-far); }
.label-observer { fill: var(--color-observer); font-weight: 600; font-size: 12px; }

.svg-angle-label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    text-anchor: end;
}

.svg-angle-label.text-near {
    fill: #a5f3fc; /* Cyan muda terang */
}

.svg-angle-label.text-far {
    fill: #fbcfe8; /* Pink muda terang */
}

/* Scale Ruler */
.scale-text {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 500;
    text-anchor: middle;
}

.scale-text.text-near { fill: var(--color-near); }
.scale-text.text-far { fill: var(--color-far); }
.scale-text.text-far-total { fill: var(--text-secondary); font-size: 11px; font-weight: 600; }

/* 5. Observer's View (Retina View) */
.retina-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 0;
}

.retina-lens {
    position: relative;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: #020308;
    border: 3px solid rgba(255, 255, 255, 0.1);
    box-shadow: 
        inset 0 10px 30px rgba(0, 0, 0, 0.9),
        0 0 20px rgba(6, 182, 212, 0.15),
        0 10px 30px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.retina-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle, transparent 20%, rgba(255,255,255,0.015) 21%, transparent 22%),
        linear-gradient(to right, rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 100% 100%, 20px 20px, 20px 20px;
    background-position: center;
    border-radius: 50%;
    pointer-events: none;
}

.retina-lens::after {
    /* Glass highlight reflection */
    content: '';
    position: absolute;
    top: 5px;
    left: 15%;
    width: 70%;
    height: 35%;
    background: linear-gradient(to bottom, rgba(255,255,255,0.12), transparent);
    border-radius: 50% 50% 30% 30%;
    pointer-events: none;
}

.retina-objects {
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 100%;
    height: 100%;
    padding: 0 20px;
    z-index: 1;
}

.retina-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.retina-circle {
    border-radius: 50%;
    transition: var(--transition-smooth);
    position: relative;
    background: radial-gradient(circle at 35% 35%, #fff 0%, transparent 70%);
}

.near-circle {
    background-color: var(--color-near);
    box-shadow: 
        0 0 25px rgba(6, 182, 212, 0.7),
        inset -5px -5px 15px rgba(0,0,0,0.5);
}

.far-circle {
    background-color: var(--color-far);
    box-shadow: 
        0 0 15px rgba(236, 72, 153, 0.7),
        inset -3px -3px 10px rgba(0,0,0,0.5);
}

.retina-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
    white-space: nowrap;
}

.view-insight {
    background: rgba(6, 182, 212, 0.05);
    border-left: 3px solid var(--color-near);
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
    padding: 12px 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.insight-icon {
    font-size: 1.1rem;
}

#insight-text {
    font-size: 0.88rem;
    color: var(--text-primary);
    line-height: 1.5;
}

#insight-text strong {
    color: var(--color-near);
}

/* 6. Controls Section */
.control-groups {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.control-info label {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.icon-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.obj-near-dot { background-color: var(--color-near); box-shadow: 0 0 6px var(--color-near); }
.obj-far-dot { background-color: var(--color-far); box-shadow: 0 0 6px var(--color-far); }
.obj-both-dot { background-color: #e2e8f0; }

.value-display {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    padding: 2px 10px;
    border-radius: var(--border-radius-sm);
}

/* Custom Range Input (Slider) Styling */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    outline: none;
    transition: var(--transition-smooth);
}

input[type="range"]:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Slider Thumbs */
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #ffffff;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
    transition: var(--transition-smooth);
}

#input-diameter::-webkit-slider-thumb {
    background: #e2e8f0;
}
#input-diameter::-webkit-slider-thumb:hover {
    background: #ffffff;
    transform: scale(1.15);
}

#input-dist-near::-webkit-slider-thumb {
    background: var(--color-near);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
}
#input-dist-near::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.8);
}

#input-dist-far::-webkit-slider-thumb {
    background: var(--color-far);
    box-shadow: 0 0 10px rgba(236, 72, 153, 0.5);
}
#input-dist-far::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 0 15px rgba(236, 72, 153, 0.8);
}

/* Firefox Support */
input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-smooth);
}

#input-diameter::-moz-range-thumb { background: #e2e8f0; }
#input-dist-near::-moz-range-thumb { background: var(--color-near); }
#input-dist-far::-moz-range-thumb { background: var(--color-far); }

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Buttons */
.action-buttons {
    margin-top: 8px;
}

.btn {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 550;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.08);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--color-near);
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.05);
}

/* 7. Mathematics & Step Calculations */
.math-content {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.formula-box {
    background: rgba(6, 182, 212, 0.03);
    border: 1px solid rgba(6, 182, 212, 0.12);
    border-radius: var(--border-radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
}

.formula-title {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--color-near);
}

.formula-latex {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    color: var(--text-primary);
}

.fraction {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    vertical-align: middle;
    font-size: 0.95em;
    padding: 0 4px;
}

.frac-top {
    border-bottom: 1.5px solid var(--text-primary);
    padding-bottom: 2px;
    width: 100%;
    text-align: center;
}

.frac-bottom {
    padding-top: 2px;
    width: 100%;
    text-align: center;
}

.paren {
    font-size: 2rem;
    font-weight: 300;
    color: var(--text-muted);
}

.formula-legend {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.formula-legend strong {
    color: var(--text-primary);
}

.step-calculations {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.step-calculations h3 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding-bottom: 8px;
}

.calc-step {
    border-left: 2px solid transparent;
    padding-left: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.calc-step.step-near { border-color: var(--color-near); }
.calc-step.step-far { border-color: var(--color-far); }

.step-title {
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.step-title .bullet {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}
.step-near .bullet { background-color: var(--color-near); }
.step-far .bullet { background-color: var(--color-far); }

.step-body {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.math-line {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.math-line.highlighted {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.math-line strong {
    font-size: 1.05rem;
}

/* Comparison banner */
.comparison-result {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--border-radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.comparison-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comparison-ratio {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 550;
    display: flex;
    align-items: center;
    gap: 8px;
}

.comparison-ratio strong {
    color: var(--color-near);
    background: rgba(6, 182, 212, 0.1);
    padding: 2px 8px;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(6, 182, 212, 0.2);
}

.comparison-desc {
    font-size: 0.86rem;
    color: var(--text-secondary);
}

.comparison-desc strong {
    color: var(--text-primary);
}

/* Color codes */
.text-near { color: var(--color-near) !important; }
.text-far { color: var(--color-far) !important; }
.text-warning { color: var(--color-warning) !important; }
.text-success { color: var(--color-success) !important; }

/* 8. Theory Card & Tables */
.theory-content {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.theory-intro {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.code-highlight {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 2px 6px;
    border-radius: var(--border-radius-sm);
    color: #e2e8f0;
    display: block;
    margin-top: 6px;
    width: fit-content;
    border: 1px solid rgba(255,255,255,0.04);
}

.table-container {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.04);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
}

th, td {
    padding: 12px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

th {
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-primary);
    font-weight: 600;
    font-family: var(--font-heading);
}

tr:last-child td {
    border-bottom: none;
}

.row-near td:first-child { border-left: 3px solid var(--color-near); }
.row-far td:first-child { border-left: 3px solid var(--color-far); }

.theory-insight {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: rgba(255,255,255,0.01);
    border: 1px dashed rgba(255,255,255,0.06);
    border-radius: var(--border-radius-md);
    padding: 16px;
}

.theory-insight h3 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.theory-insight ul {
    list-style-type: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.theory-insight li {
    font-size: 0.84rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 15px;
}

.theory-insight li::before {
    content: "✦";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--color-near);
}

.theory-insight li strong {
    color: var(--text-primary);
}

/* 8b. Solar Divergence Card Styles */
.solar-card::before {
    background: linear-gradient(90deg, #f59e0b, #ef4444);
}

.solar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 850px) {
    .solar-grid {
        grid-template-columns: 1fr;
    }
}

.solar-inputs-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: rgba(0, 0, 0, 0.2);
    padding: 20px;
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.solar-control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.solar-control-group label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
}

.solar-input-wrapper {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-sm);
    padding: 0 12px;
}

.solar-input-wrapper input {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: #f59e0b;
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    padding: 10px 0;
}

.input-unit {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
}

.solar-select {
    width: 100%;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
    padding: 10px 12px;
    border-radius: var(--border-radius-sm);
    outline: none;
    font-family: var(--font-body);
    font-size: 0.9rem;
    cursor: pointer;
}

.solar-select option {
    background: #0f172a;
    color: #fff;
}

.solar-preset-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 6px;
}

.chip {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.chip:hover, .chip-active {
    background: rgba(245, 158, 11, 0.15);
    border-color: #f59e0b;
    color: #f59e0b;
}

.solar-results-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.solar-result-card {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.08) 0%, rgba(239, 68, 68, 0.04) 100%);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--border-radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
}

.result-badge {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #f59e0b;
}

.solar-main-value {
    font-family: var(--font-mono);
    font-size: 2.4rem;
    font-weight: 700;
    color: #fef08a;
    text-shadow: 0 0 20px rgba(245, 158, 11, 0.4);
}

.solar-units-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    width: 100%;
    margin-top: 6px;
}

.unit-box {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--border-radius-sm);
    padding: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.unit-title {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
}

.unit-val {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.solar-explanation {
    background: rgba(255, 255, 255, 0.02);
    border-left: 3px solid #f59e0b;
    padding: 14px 16px;
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.exp-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.solar-explanation p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.btn-sun {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(239, 68, 68, 0.15) 100%);
    color: #fef08a;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.btn-sun:hover {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.3) 0%, rgba(239, 68, 68, 0.3) 100%);
    border-color: #f59e0b;
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.2);
}

/* 9. Footer */
.poster-footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.06);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.poster-footer p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.poster-footer .copyright {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}