@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600&display=swap');

:root {
    --bg-color: #121212;
    --calc-bg: #1e1e1e;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --btn-bg: #2d2d2d;
    --btn-hover: #3d3d3d;
    --accent-color: #bb86fc;
    --accent-hover: #9965f4;
    --operator-color: #03dac6;
    --operator-hover: #018786;
    --error-color: #cf6679;
    --shadow-light: rgba(255, 255, 255, 0.05);
    --shadow-dark: rgba(0, 0, 0, 0.5);
    /* Nav variables added to match theme */
    --nav-bg: #1e1e1e;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    /* Changed to column to stack navbar and calculator */
    min-height: 100vh;
}

/* Navigation Styles (Preserved) */
.navbar{
    background-color: var(--nav-bg);
    padding: 1rem 2rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 400;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--accent-color);
}

/* Content Container Styles (Preserved) */
.content-container {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.content-container h1 {
    color: var(--accent-color);
    margin-bottom: 2rem;
}

.content-container p {
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

/* Calculator Container - Adapted for layout */
.calculator-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    /* Added to vertically center */
    gap: 20px;
    flex-grow: 1;
    /* Added to take up available space */
    padding: 2rem;
}

/* User's Preferred Calculator Styles */
.calculator {
    background-color: var(--calc-bg);
    border-radius: 20px;
    box-shadow: 0 10px 25px var(--shadow-dark), 0 -2px 5px var(--shadow-light);
    width: 350px;
    overflow: hidden;
    padding: 20px;
}

.display {
    background-color: #000000;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    text-align: right;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100px;
    word-break: break-all;
    word-wrap: break-word;
}

.previous-operand {
    color: var(--text-secondary);
    font-size: 1rem;
    min-height: 1.2rem;
}

.current-operand {
    color: var(--text-primary);
    font-size: 2.5rem;
    font-weight: 600;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.btn {
    border: none;
    outline: none;
    background-color: var(--btn-bg);
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 500;
    border-radius: 12px;
    padding: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.btn:active {
    transform: scale(0.95);
}

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

.btn.fn {
    color: var(--error-color);
    font-weight: 600;
}

.btn.operator {
    color: var(--operator-color);
    font-size: 1.4rem;
}

.btn.equals {
    grid-column: span 1;
    background-color: var(--accent-color);
    color: #000;
    font-weight: 700;
}

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

.btn.zero {
    grid-column: span 2;
}

.footer {
    color: var(--text-secondary);
    font-size: 0.8rem;
    opacity: 0.7;
}

@media (max-width: 400px) {
    .calculator {
        width: 100%;
        max-width: 320px;
    }

    .btn {
        padding: 12px;
        font-size: 1.1rem;
    }
}