/* calculatorx-styles.css */
/* Global Styles and Variables */
:root {
    /* Color Scheme */
    --primary-bg: #fafaeb;
    --container-bg: #e8e0d0;
    --display-bg: #d0d0c8;
    --button-bg: #d8d0c0;
    --button-hover: #c8c0b0;
    --operator-bg: #4a6572;
    --operator-hover: #3a5562;
    --function-bg: #3a5562;
    --function-hover: #2a4552;
    --clear-bg: #D86A26;
    --clear-hover: #BB6533;
    --ad-bg: linear-gradient(to right, #e0e0d8, #d0d0c8);
    --ad-unit-bg: linear-gradient(to bottom, #f0f0e8, #e8e8e0);
    --category-bg: linear-gradient(to bottom, #f5f5ed, #e8e8e0);
    
    /* Text Colors */
    --text-primary: #333;
    --text-dark: #1a3a2a;
    --text-medium: #3a5562;
    --text-light: #7a7a72;
    --text-white: white;
    
    /* Borders */
    --border-light: #d8d0c0;
    --border-medium: #c8c0b0;
    --border-dark: #8f8f75;
    
    /* Sizes and Spacing */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 4px 8px rgba(0, 0, 0, 0.08);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* Typography */
h1 {
    color: var(--text-medium);
    font-size: 2.8rem;
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    text-align: center;
}

h2 {
    color: #2f4551;
    margin: 20px 0 15px;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Header Styles */
header {
    text-align: center;
    padding: 20px 0;
}

.signup {
    float: right;
}

/* Advertisement Spaces */
.ad-space {
    
    <!-- width: 50%;
    float: right;
    margin-left: 20px;
    -->
    
    
    width: 100%;
    height: 90px;
    float: none;
    text-align: center;
    margin-left: 20px;
    min-height: auto;
    background: var(--ad-bg);
    padding: 15px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: right;
    color: var(--text-light);
    font-style: italic;
    border: 1px dashed var(--border-dark);
}

.ad-container {
    display: flex;
    flex-direction: column;
    width: 30%;
    gap: 15px;
}

.ad-unit {
    background: var(--ad-unit-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-style: italic;
    text-align: center;
}

.ad-unit i {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--text-medium);
}

.ad-title {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-medium);
}

/* Layout */
.main-content {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
}

.calculator-section {
    display: flex;
    flex-direction: column;
    width: 70%;
    gap: 30px;
}

/* Calculator Container */
.calculator-container {
    background-color: var(--container-bg);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow);
    flex: 1;
}

/* Display Area */
.display-container {
    background-color: var(--display-bg);
    border-radius: var(--border-radius-sm);
    margin-bottom: 10px;
    padding: 7px;
    color: var(--text-dark);
    border: 1px solid var(--border-medium);
}

.calculation {
    font-size: 16px;
    min-height: 28px;
    text-align: right;
    color: #4a6a5a;
    overflow: hidden;
    margin-bottom: 5px;
}

.display {
    text-align: right;
    font-size: 40px;
    min-height: 45px;
    overflow: hidden;
    color: var(--text-dark);
    font-weight: 500;
}

/* Calculator Buttons - NEW STRUCTURE */
.buttons-container {
    display: flex;
    flex-direction: row;
    gap: 10px;
}

.button-group {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    flex: 1;
}

/* Specific styling for the basic operations group */
.group-basic {
    /* No special ordering for desktop */
}

/* Specific styling for the advanced functions group */
.group-advanced {
    /* No special ordering for desktop */
}

button {
    padding: 12px;
    border: none;
    border-radius: var(--border-radius-sm);
    background-color: var(--button-bg);
    cursor: pointer;
    font-size: 16px;
    transition: all 0.2s;
    color: var(--text-primary);
    position: relative;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

button:hover {
    background-color: var(--button-hover);
    transform: translateY(-2px);
}

/* Number buttons (0-9, decimal) */
button[data-value] {
    background-color: var(--button-bg);
    color: var(--text-primary);
}

button[data-value]:hover {
    background-color: var(--button-hover);
}

/* Basic Functions (+, -, ×, ÷, =) */
button.operator {
    background-color: var(--operator-bg);
    color: var(--text-white);
}

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

/* Advanced Functions (%, √, M+, M-) */
button.function {
    background-color: var(--function-bg);
    color: var(--text-white);
}

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

/* Clear/All-Clear (C, AC) */
button[data-func="clear"],
button[data-func="clearEntry"] {
    background-color: var(--clear-bg);
    color: var(--text-white);
}

button[data-func="clear"]:hover,
button[data-func="clearEntry"]:hover {
    background-color: var(--clear-hover);
}

button.equals {
    background-color: var(--operator-bg);
    color: var(--text-white);
    grid-column: span 2;
    font-weight: bold;
}

button.equals:hover {
    background-color: var(--operator-hover);
}

button:active, button.key-active {
    transform: translateY(2px);
    box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.2);
}

.key-badge {
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 8.5px;
    background: rgba(0, 0, 0, 0.18);
    border-radius: 3px;
    padding: 2px 4px;
    color: rgba(255, 255, 255, 0.9);
}

/* Categories Section */
.categories-section {
    background-color: var(--container-bg);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.category-box {
    background: var(--category-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: transform 0.3s ease;
}

.category-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.category-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-light);
}

.category-icon {
    width: 40px;
    height: 40px;
    background-color: var(--text-medium);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
}

.category-icon i {
    color: var(--text-white);
    font-size: 18px;
}

.category-title {
    font-size: 1.2rem;
    color: #2a5c4c;
    font-weight: 600;
}

/* Calculator List */
.calculator-list {
    list-style-type: none;
}

.calculator-list li {
    padding: 10px 0;
    border-bottom: 1px dashed var(--border-light);
    text-align: left;
    padding-left: 10px;
}

.calculator-list li:last-child {
    border-bottom: none;
}

.calculator-list a {
    color: var(--text-medium);
    text-decoration: none;
    transition: color 0.2s;
    display: block;
    font-size: 14px;
    padding: 5px 0;
}

.calculator-list a:hover {
    color: #2a4552;
    text-decoration: underline;
    background-color: var(--button-bg);
    padding: 5px;
    border-radius: 5px;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 50px;
    padding: 20px;
    color: var(--text-medium);
    border-top: 1px solid var(--border-light);
}

.footer-links {
    margin: 15px 0;
}

.footer-links a {
    color: var(--text-medium);
    text-decoration: none;
    margin: 0 10px;
}

.footer-links a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .main-content {
        flex-direction: column;
    }
    
    .calculator-section, .ad-container {
        width: 100%;
    }
    
    .ad-container {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .ad-unit {
        flex: 0 0 calc(50% - 10px);
    }
    
    .categories-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    .categories-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .ad-container {
        flex-direction: column;
    }
    
    .ad-unit {
        flex: 1;
    }
    
    .buttons-container {
        flex-direction: column;
    }
    
    /* Ensure proper ordering on mobile */
    .group-basic {
        order: 2;
    }
    
    .group-advanced {
        order: 1;
    }
    
    h1 {
        font-size: 2.2rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .calculator-container, .categories-section {
        padding: 15px;
    }
    
    .button-group {
        gap: 8px;
    }
    
    button {
        padding: 10px;
        font-size: 14px;
    }
    
    .display {
        font-size: 28px;
    }
    
    .calculation {
        font-size: 16px;
    }
}

/* For very small screens, adjust button sizes further */
@media (max-width: 360px) {
    .button-group {
        gap: 5px;
    }
    
    button {
        padding: 8px 5px;
        font-size: 12px;
    }
    
    .key-badge {
        font-size: 7px;
        padding: 1px 2px;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mb-20 {
    margin-bottom: 20px;
}

.mt-20 {
    margin-top: 20px;
}

.hidden {
    display: none;
}

.flex {
    display: flex;
}

.flex-column {
    flex-direction: column;
}

.justify-center {
    justify-content: center;
}

.align-center {
    align-items: center;
}

/* Animation Keyframes */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}