:root {
    --bg-color: #0d0e12;
    --card-bg: rgba(30, 31, 38, 0.7);
    --text-primary: #f0f0f5;
    --text-secondary: #94a3b8;
    --accent-color: #64ffda;
    --accent-glow: rgba(100, 255, 218, 0.4);
    --accent-hover: #4adbc4;
    --border-color: rgba(255, 255, 255, 0.08);
    --input-bg: rgba(15, 17, 23, 0.6);
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background: radial-gradient(circle at 50% 0%, #1e1f26 0%, #0d0e12 100%);
    color: var(--text-primary);
    font-family: var(--font-main);
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 2.5rem 1rem;
    line-height: 1.5;
}

.app-container {
    width: 100%;
    max-width: 1100px;
}

header {
    margin-bottom: 3rem;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

header .subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
}

/* Base Card Styling with Glassmorphism */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

h2 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

/* Config Section (Top) */
.config-section {
    margin-bottom: 2rem;
    padding: 2rem;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, transparent 100%);
}

.config-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(4, 1fr);
    gap: 1.5rem;
    align-items: end;
}

.config-item label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
    font-weight: 500;
}

input[type="number"],
input[type="text"],
select {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: #fff;
    font-family: var(--font-mono);
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(100, 255, 218, 0.05);
    box-shadow: 0 0 0 4px rgba(100, 255, 218, 0.1);
}

option {
    background-color: #1e1f26;
    color: #fff;
}

.presets-row {
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.preset-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.btn-preset {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-preset:hover {
    background: rgba(100, 255, 218, 0.1);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1.8fr 1.2fr;
    gap: 2rem;
}

.content-card {
    padding: 2rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.usage-badge {
    background: rgba(100, 255, 218, 0.1);
    color: var(--accent-color);
    padding: 0.4rem 0.8rem;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 700;
    border: 1px solid rgba(100, 255, 218, 0.2);
    text-transform: uppercase;
}

.result-display-large {
    background: #000;
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid rgba(100, 255, 218, 0.15);
    box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.8), 0 0 20px rgba(100, 255, 218, 0.05);
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.res-value {
    font-family: var(--font-mono);
    font-size: 3.5rem;
    color: #fff;
    font-weight: 700;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
    line-height: 1;
}

.x-sep {
    color: var(--accent-color);
    margin: 0 0.5rem;
    opacity: 0.8;
}

.res-value .unit {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-left: 0.5rem;
}

.ar-tag {
    color: var(--accent-color);
    opacity: 0.7;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

/* Tool Cards */
.tools-column {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.tool-card {
    padding: 2rem;
}

.tool-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.tool-result {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s;
}

.tool-result:hover {
    transform: translateY(-2px);
}

.tool-result.highlight {
    border-color: rgba(100, 255, 218, 0.3);
    background: radial-gradient(circle at center, rgba(100, 255, 218, 0.05) 0%, transparent 100%);
}

.tr-row {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.tr-row .label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.tr-row .value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    font-family: var(--font-mono);
    text-shadow: 0 0 10px var(--accent-glow);
}

.rec-row {
    margin-top: 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
}

.tool-result .large {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent-color);
    font-family: var(--font-mono);
    text-shadow: 0 0 10px var(--accent-glow);
    margin-top: 0.5rem;
    display: block;
}

/* Visualization */
.visualization-container {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    padding: 2rem;
    min-height: 280px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.projector-frame {
    border: 1px dashed var(--text-secondary);
    background: rgba(255, 255, 255, 0.02);
    position: relative;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
}

.content-slice {
    background: rgba(100, 255, 218, 0.15);
    border: 2px solid var(--accent-color);
    box-shadow: 0 0 15px var(--accent-glow);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.frame-label,
.viz-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
}

.frame-label {
    position: absolute;
    bottom: -20px;
    right: 0;
    color: var(--text-secondary);
}

.viz-label {
    color: #fff;
}

/* Actions */
.btn-primary {
    background: var(--accent-color);
    color: #0d0e12;
    border: none;
    padding: 1.25rem 2rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    box-shadow: 0 4px 0px #3db39e, 0 8px 20px rgba(100, 255, 218, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 0px #3db39e, 0 12px 24px rgba(100, 255, 218, 0.4);
    background: var(--accent-hover);
}

.btn-primary:active {
    transform: translateY(2px);
    box-shadow: 0 2px 0px #3db39e, 0 4px 8px rgba(100, 255, 218, 0.2);
}

.full-width {
    width: 100%;
}

@media (max-width: 1000px) {
    .config-grid {
        grid-template-columns: 1fr 1fr;
    }

    .config-item.wide {
        grid-column: span 2;
    }
}

@media (max-width: 800px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}