@import url('https://cdn.jsdelivr.net/npm/et-book@1.0.0/et-book.css');

:root {
    --bg-main: #12161A;       
    --bg-panel: #1A2026;      
    --bg-scope: #090C0E;      
    --accent: #55CFCF;        
    --text-main: #EAF7F7;     
    --text-muted: #788994;    
    
  
    --font-suite: 'et-book', serif;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-suite);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    letter-spacing: 0.02em;
}

.dashboard {
    background-color: var(--bg-panel);
    padding: 2.5rem;
    border-radius: 6px;
    border: 1px solid rgba(85, 207, 207, 0.2);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(234, 247, 247, 0.1);
    width: 95%;
    max-width: 950px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--bg-main);
    padding-bottom: 1.2rem;
}


h1 { 
    color: var(--accent); 
    font-size: 1.8rem;
    font-weight: normal; 
    text-transform: uppercase;
    letter-spacing: 0.25em; 
    text-shadow: 0 0 8px rgba(85, 207, 207, 0.2);
}

.controls-top {
    display: flex;
    gap: 1rem;
}

.oscilloscope-container {
    background-color: var(--bg-scope);
    border: 1px solid rgba(85, 207, 207, 0.4);
    border-radius: 4px;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.9), 0 4px 12px rgba(0, 0, 0, 0.3);
    margin-bottom: 2.5rem;
    position: relative;
}


.oscilloscope-container::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(rgba(85, 207, 207, 0.03) 50%, rgba(0, 0, 0, 0.1) 50%);
    background-size: 100% 4px;
    z-index: 2;
    pointer-events: none;
}

canvas { 
    width: 100%; 
    height: 300px; 
    display: block; 
    position: relative;
    z-index: 1;
}

.control-panel { 
    display: flex; 
    justify-content: space-between; 
    gap: 1.5rem; 
}

.signal-box {
    flex: 1;
    background-color: var(--bg-main);
    padding: 1.25rem;
    border: 1px solid rgba(234, 247, 247, 0.05);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}

h3 { 
    color: var(--text-main); 
    font-size: 1rem; 
    font-weight: normal;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border-bottom: 1px solid rgba(234, 247, 247, 0.1);
    padding-bottom: 0.4rem;
}

label {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

select, input {
    background-color: var(--bg-scope);
    color: var(--accent);
    border: 1px solid rgba(85, 207, 207, 0.3);
    padding: 0.6rem;
    font-family: var(--font-suite);
    border-radius: 3px;
    outline: none;
    transition: border-color 0.2s;
}


input[type="number"] {
    font-size: 1.2rem;
    letter-spacing: 0.05em;
}

select:focus, input:focus {
    border-color: var(--accent);
}

button {
    background-color: var(--bg-scope);
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 0.8rem 1.5rem;
    font-family: var(--font-suite);
    font-size: 0.9rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border-radius: 3px;
    transition: all 0.2s ease;
}

button:hover:not([disabled]) { 
    background-color: var(--accent); 
    color: var(--bg-main);
    box-shadow: 0 0 10px rgba(85, 207, 207, 0.4);
}

button:active:not([disabled]) {
    transform: scale(0.98);
}

button[disabled] { 
    opacity: 0.25; 
    cursor: not-allowed; 
    border-color: var(--text-muted); 
    color: var(--text-muted); 
}

.toggle.on { 
    background-color: var(--accent); 
    color: var(--bg-main); 
    font-weight: bold;
    box-shadow: 0 0 12px rgba(85, 207, 207, 0.3);
}