/* Basic reset and body styles */
body {
    font-family: Arial, sans-serif;
    background-color: #f5f7fa;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

.calculator {
    background-color: #e8ecef;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    width: 320px;
}

/* Screen styles */
.screen {
    background-color: #2d3748;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 15px;
    min-height: 60px;
    color: #a0aec0;
    font-size: 24px;
    text-align: right;
}

.screen-content h5 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: normal;
}

/* Main calculator grid layout */
.calculator {
    display: grid;
    grid-template-areas:
        "screen screen"
        "top-ops top-ops"
        "numbers operations";
    grid-template-rows: auto auto 1fr;
    grid-template-columns: 3fr 1fr;
    gap: 10px;
}

.screen {
    grid-area: screen;
}

/* Top operations row */
.operations-buttons {
    grid-area: top-ops;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
    height: 60px;
}

.operations-buttons > div {
    display: contents;
}

/* Parentheses buttons */
.Parentheses {
    display: grid !important;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

/* Right side operations */
.operation {
    grid-area: operations;
    display: grid;
    grid-template-rows: repeat(5, 1fr); /* Changed to 5 rows for equals button */
    gap: 8px;
}

.operation > div {
    height: 60px;
}

/* Numbers grid */
.numbers.button {
    grid-area: numbers;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(4, 1fr); /* Only 4 rows now */
    gap: 8px;
    height: calc(4 * 60px + 3 * 8px);
}

/* Button base styles */
button {
    border: none;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    height: 60px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    aspect-ratio: 1;
}

/* Ensure all containers have exact same sizing */
.operations-buttons button,
.operation button,
.numbers button {
    height: 60px;
    min-width: 0;
}

/* Number buttons - soft blue */
.numbers button {
    background-color: #bee3f8;
    color: #2b6cb0;
}

.numbers button:hover {
    background-color: #90cdf4;
    transform: scale(1.02);
}

/* Operation buttons (+, -, *, /) - soft green */
.operation button {
    background-color: #9ae6b4;
    color: #276749;
}

.operation button:hover {
    background-color: #68d391;
    transform: scale(1.02);
}

/* Equals button - soft orange (NOW IN OPERATIONS) */
.equation button {
    background-color: #fbd38d;
    color: #dd6b20;
}

.equation button:hover {
    background-color: #f6ad55;
    transform: scale(1.02);
}

/* Top row buttons */
.clear button {
    background-color: #fed7d7;
    color: #c53030;
}

.clear button:hover {
    background-color: #feb2b2;
    transform: scale(1.02);
}

.Parentheses button {
    background-color: #e9d8fd;
    color: #6b46c1;
}

.Parentheses button:hover {
    background-color: #d6bcfa;
    transform: scale(1.02);
}

.percent button {
    background-color: #fbb6ce;
    color: #b83280;
}

.percent button:hover {
    background-color: #f687b3;
    transform: scale(1.02);
}

/* Zero button spans 2 columns */
.numbers button:nth-last-child(2) { /* Changed selector since equals is gone */
    grid-column: span 2;
    aspect-ratio: 2;
}

/* Perfect vertical alignment */
.operation {
    height: calc(5 * 60px + 4 * 8px); /* Updated for 5 rows */
}