:root {
    --bg-color: #1a1a1a;
    --text-color: #fff;
    --accent-color: #fff;
    --border-color: #333;
    --input-bg: #222;
    --font-family: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    padding: 60px 20px;
    min-height: 100vh;
}

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

header {
    text-align: center;
    margin-bottom: 80px;
}

header h1 {
    font-weight: 200;
    letter-spacing: -1px;
    font-size: 2.5rem;
    text-transform: lowercase;
}

/* Section Layout */
main > section {
    margin-bottom: 80px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

h2 {
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #444;
}

.toggle-group {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.8rem;
    color: #444;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Display Areas */
.display-area {
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 0;
}

#scale-display {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -1px;
}

#scale-notes {
    font-size: 1rem;
    color: #555;
    font-family: var(--font-family);
    word-spacing: 12px;
}

/* Controls */
.controls-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

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

.control-group label {
    font-size: 0.6rem;
    text-transform: uppercase;
    color: #444;
    letter-spacing: 1px;
}

input[type="number"] {
    background-color: transparent;
    border: none;
    border-bottom: 1px solid var(--border-color);
    color: #fff;
    padding: 12px 0;
    font-family: var(--font-family);
    outline: none;
    font-size: 1.2rem;
    transition: border-color 0.2s;
}

input[type="number"]:focus {
    border-color: #888;
}

/* Scale Picker Row */
.scale-controls {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 12px;
}

.scale-picker {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
}

select {
    background-color: transparent;
    border: none;
    border-bottom: 1px solid var(--border-color);
    color: #fff;
    padding: 12px 0;
    font-family: var(--font-family);
    outline: none;
    font-size: 1.2rem;
    cursor: pointer;
    transition: border-color 0.2s;
    -webkit-appearance: none;
    appearance: none;
    text-transform: lowercase;
}

select:focus {
    border-color: #888;
}

select option {
    background-color: #111;
    color: #fff;
}

/* No Repeats Status Label */
#no-repeats-status {
    font-size: 0.6rem;
    color: #444;
    margin-left: 10px;
    text-transform: none;
    letter-spacing: 0;
}

button {
    width: 100%;
    padding: 20px;
    border: 1px solid #fff;
    background: transparent;
    color: #fff;
    border-radius: 0;
    cursor: pointer;
    font-family: var(--font-family);
    font-weight: 400;
    transition: all 0.2s ease;
    text-transform: lowercase;
    font-size: 1.2rem;
}

button:hover {
    background-color: #fff;
    color: #000;
}

button.primary {
    background-color: #fff;
    color: #000;
    font-weight: 600;
}

button.primary:hover {
    background-color: transparent;
    color: #fff;
    border-color: #fff;
}

/* Side Layout Results */
.side-layout {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: start;
    margin-top: 60px;
}

#grid-container {
    display: grid;
    gap: 12px;
}

.grid-item {
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.2rem;
    font-weight: 200;
    border: 1px solid #2a2a2a;
    animation: fadeIn 0.4s ease forwards;
}

#translation-container {
    text-align: left;
    font-size: 2.2rem;
    line-height: 1.2;
    letter-spacing: 4px;
    font-weight: 200;
    color: #fff;
    font-family: var(--font-family);
    text-transform: uppercase;
    word-break: break-all;
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

@media (max-width: 768px) {
    .side-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

/* Switch styling simplified */
.switch {
  position: relative;
  display: inline-block;
  width: 34px;
  height: 18px;
}

.switch input { opacity: 0; width: 0; height: 0; }

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #2a2a2a;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 14px; width: 14px;
  left: 2px; bottom: 2px;
  background-color: white;
  transition: .4s;
}

input:checked + .slider { background-color: #888; }
input:checked + .slider:before { transform: translateX(16px); }