/* hosting */

:root {
    --bg-main: #121214;
    --bg-card: #1a1a1e;
    --bg-input: #26262b;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --danger: #ef4444;
    --border: #2e2e35;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  margin: 0;
  padding: clamp(10px, 4vw, 40px);
  min-height: 100vh;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: var(--text-main);
  background: linear-gradient(rgba(10, 15, 30, 0.88), rgba(10, 15, 30, 0.88)),
              url('../../images/underground-zone.png') center/cover no-repeat fixed;
  filter: saturate(1.4);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
}

/* rest */

.container {
    width: 100%;
    max-width: 1000px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: clamp(15px, 3vw, 20px); /* Fluid internal card padding */
}

h2 {
    font-size: 1.25rem;
    margin-bottom: 15px;
    font-weight: 600;
}

/* Mobile-First Input Row: Stack vertically on small screens */
.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr; /* 2x2 grid on mobile */
    gap: 10px;
    align-items: center;
    margin-bottom: 12px;
    border-bottom: 1px dashed var(--border); /* Visual separator for mobile lists */
    padding-bottom: 12px;
}

/* Span fields across layout blocks on small viewports */
.sub-name {
    grid-column: span 2;
}

input, select {
    background-color: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 10px;
    border-radius: 6px;
    font-size: 0.95rem;
    width: 100%;
}

input:focus, select:focus {
    outline: 2px solid var(--accent);
}

button {
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s;
}

.btn-add {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 12px 15px;
    border-radius: 6px;
    margin-top: 5px;
    width: 100%;
}

.btn-add:hover { background-color: var(--accent-hover); }

.btn-del {
    background-color: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    padding: 10px;
    border-radius: 6px;
}

.btn-del:hover {
    background-color: var(--danger);
    color: white;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

.metric-card {
    background-color: var(--bg-input);
    border: 1px solid var(--border);
    padding: 15px;
    border-radius: 8px;
    text-align: center;
}

.metric-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.metric-value {
    font-size: clamp(1.1rem, 2vw, 1.4rem); /* Text sizes dynamically fit small metrics cards */
    font-weight: 700;
    color: var(--text-main);
}

.slider-container {
    margin-top: 15px;
}

.slider-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

input[type="range"] {
    accent-color: var(--accent);
    cursor: pointer;
}

.canvas-container {
    width: 100%;
    height: clamp(200px, 40vh, 300px); /* Canvas scales beautifully on small vertical screens */
    position: relative;
}

canvas {
    width: 100%;
    height: 100%;
    background-color: var(--bg-input);
    border-radius: 8px;
    border: 1px solid var(--border);
}

/* Tablet & Desktop Optimizations (768px and up) */
@media (min-width: 768px) {
    .container {
        grid-template-columns: 1fr 1fr;
    }
    
    .full-width {
        grid-column: span 2;
    }

    /* Snap input rows back into a single fluid horizontal strip */
    .input-row {
        grid-template-columns: 2fr 1fr 1fr auto;
        border-bottom: none;
        padding-bottom: 0;
        margin-bottom: 10px;
    }

    .sub-name {
        grid-column: auto;
    }
}