@charset "UTF-8";



/* ------------------------ */
/*       Variablen          */
/* ------------------------ */


:root {
    --body-color: #2a2d35;
    --body-highlight: #3a3e4a;
    --body-shadow: #1a1c22;

    --btn-pink: #c4357a;
    --btn-pink-top: #d94a8e;
    --btn-pink-shadow: #7a1a48;

    --btn-dark: #3c404c;
    --btn-dark-top: #4a4f5e;
    --btn-darker: #2e3240;
    --btn-darker-top: #3a3f50;

    --display-bg: #1a0828;
    --display-glow: #d060ff;
    --display-dim: #4a1870;

    --font-display: 'Courier New', monospace;
}






/* ------------------------ */
/* Allgemeine Einstellungen */
/* ------------------------ */


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

body {
    min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      background: #13141a;
    }







/* ------------------------ */
/*           Gehäuse        */
/* ------------------------ */

.calc-scene {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2.5rem 1rem 3rem;
    perspective: 800px;
}

.calc-body {
    width: 280px;
    background: linear-gradient(160deg, var(--body-highlight) 0%, var(--body-color) 40%, var(--body-shadow) 100%);
    border-radius: 18px 18px 28px 28px;
    padding: 20px 18px 28px;
    box-shadow:
      0 2px 0 #4a4f5e inset,
      0 -2px 0 #111318 inset,
      2px 0 0 #3a3e4a inset,
      -2px 0 0 #111318 inset,
      0 20px 60px rgba(0,0,0,0.7),
      0 4px 12px rgba(0,0,0,0.5),
      0 1px 0 #5a5f70;
    position: relative;
    transform: rotateX(4deg);
}

.calc-body::before {
    content: '';
    position: absolute;
    top: 10px; left: 18px; right: 18px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
}


.calc-base {
    position: absolute;
    bottom: -8px;
    left: 10px; right: 10px;
    height: 10px;
    background: var(--body-shadow);
    border-radius: 0 0 20px 20px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.4);
}




/* ------------------------ */
/*       Rechner-Kopf       */
/* ------------------------ */


.brand {
    font-family: 'Arial Narrow', Arial, sans-serif;
    font-size: 9px;
    letter-spacing: 3px;
    color: rgba(255,255,255,0.25);
    text-transform: uppercase;
    text-align: right;
    margin-bottom: 12px;
    padding-right: 2px;
}

.solar-strip {
    height: 8px;
    background: linear-gradient(90deg, #1a1a2e, #6b21a8, #db2777, #9333ea, #1a1a2e);
    border-radius: 3px;
    margin-bottom: 12px;
    opacity: 0.8;
    box-shadow: 0 0 6px rgba(180,0,255,0.25), 0 1px 0 rgba(0,0,0,0.3) inset;
}





/* ------------------------ */
/*           Display        */
/* ------------------------ */


.display-frame {
    background: #111318;
    border-radius: 8px;
    padding: 10px 12px 8px;
    margin-bottom: 18px;
    box-shadow:
        0 3px 8px rgba(0,0,0,0.6) inset,
        0 1px 0 rgba(180,80,255,0.08);
}

.display-screen {
    background: var(--display-bg);
    border-radius: 4px;
    padding: 8px 10px 6px;
    box-shadow:
        0 0 0 1px rgba(0,0,0,0.5),
        0 2px 4px rgba(0,0,0,0.4) inset,
        0 0 20px rgba(180,0,255,0.06) inset;
    position: relative;
    overflow: hidden;
}

.display-screen::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(0,0,0,0.08) 3px, rgba(0,0,0,0.08) 4px);
    pointer-events: none;
}

.display-label {
    font-family: var(--font-display);
    font-size: 9px;
    color: var(--display-dim);
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.display-value {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: normal;
    color: var(--display-glow);
    text-align: right;
    letter-spacing: 1px;
    min-height: 42px;
    line-height: 1.2;
    text-shadow: 0 0 10px rgba(200,80,255,0.6), 0 0 20px rgba(180,0,255,0.3);
    word-break: break-all;
}





/* ------------------------ */
/*          Buttons         */
/* ------------------------ */


.btn-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.btn {
    position: relative;
    height: 48px;
    border: none;
    cursor: pointer;
    border-radius: 6px;
    font-family: 'Arial Narrow', Arial, sans-serif;
    font-size: 15px;
    font-weight: bold;
    letter-spacing: 0.5px;
    outline: none;
    user-select: none;
    transition: transform 80ms ease, box-shadow 80ms ease;
}

.btn-num {
    background: linear-gradient(180deg, var(--btn-dark-top) 0%, var(--btn-dark) 50%, #30343f 100%);
    color: #d0d4de;
    box-shadow:
        0 4px 0 #1e2028,
        0 5px 2px rgba(0,0,0,0.5),
        0 1px 0 rgba(255,255,255,0.07) inset;
    text-shadow: 0 1px 1px rgba(0,0,0,0.5);
}

.btn-op {
    background: linear-gradient(180deg, var(--btn-pink-top) 0%, var(--btn-pink) 50%, #a02860 100%);
    color: #fff0f8;
    box-shadow:
        0 4px 0 var(--btn-pink-shadow),
        0 5px 2px rgba(0,0,0,0.5),
        0 1px 0 rgba(255,200,220,0.2) inset;
    text-shadow: 0 1px 1px rgba(0,0,0,0.3);
}

.btn-fn {
    background: linear-gradient(180deg, var(--btn-darker-top) 0%, var(--btn-darker) 50%, #252838 100%);
    color: #a0a4b0;
    font-size: 12px;
    box-shadow:
        0 4px 0 #181a22,
        0 5px 2px rgba(0,0,0,0.5),
        0 1px 0 rgba(255,255,255,0.05) inset;
    text-shadow: 0 1px 1px rgba(0,0,0,0.5);
}

.btn-zero {
    grid-column: span 2;
    text-align: left;
    padding-left: 16px;
}

.btn:active, .btn.pressed {
    transform: translateY(3px);
    box-shadow:
        0 1px 0 rgba(0,0,0,0.4),
        0 1px 1px rgba(0,0,0,0.3),
        0 1px 0 rgba(255,200,255,0.05) inset !important;
}