/**
 * Coning Calculator - Styles
 * Version: 1.0.0
 * Created: September 2025
 * Description: CSS styling for Coning Calculator web application
 */

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

:root {
    /* Light theme (default) */
    --bg-color: #efede9;
    --container-bg: #fff;
    --text-color: #333;
    --border-color: #000;
    --input-bg: #fff;
    --input-border: #999;
    --input-border-focus: #8080c0;
    --input-border-valid: #27ae60;
    --input-border-invalid: #f39c12;
    --block-bg: #c0c0c0;
    --button-bg: #87ceeb;
    --button-hover: #5fb3d4;
    --button-disabled: #ccc;
    --result-bg: #d4edda;
    --result-border: #27ae60;
    --result-text: #155724;
    --footer-bg: rgba(255, 255, 255, 0.7);
    --footer-border: #ccc;
    --footer-text: #666;
    --accent-color: #8080c0;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --container-bg: #2d2d2d;
    --text-color: #e0e0e0;
    --border-color: #555;
    --input-bg: #3a3a3a;
    --input-border: #555;
    --input-border-focus: #9999d0;
    --input-border-valid: #4ade80;
    --input-border-invalid: #f59e0b;
    --block-bg: #404040;
    --button-bg: #4a90e2;
    --button-hover: #357abd;
    --button-disabled: #555;
    --result-bg: #1f3a28;
    --result-border: #4ade80;
    --result-text: #86efac;
    --footer-bg: rgba(45, 45, 45, 0.9);
    --footer-border: #555;
    --footer-text: #aaa;
    --accent-color: #9999d0;
}

@media (prefers-color-scheme: dark) {
    [data-theme="os"] {
        --bg-color: #1a1a1a;
        --container-bg: #2d2d2d;
        --text-color: #e0e0e0;
        --border-color: #555;
        --input-bg: #3a3a3a;
        --input-border: #555;
        --input-border-focus: #9999d0;
        --input-border-valid: #4ade80;
        --input-border-invalid: #f59e0b;
        --block-bg: #404040;
        --button-bg: #4a90e2;
        --button-hover: #357abd;
        --button-disabled: #555;
        --result-bg: #1f3a28;
        --result-border: #4ade80;
        --result-text: #86efac;
        --footer-bg: rgba(45, 45, 45, 0.9);
        --footer-border: #555;
        --footer-text: #aaa;
        --accent-color: #9999d0;
    }
}

html {
    background-color: var(--bg-color);
    font-family: Arial, sans-serif;
    transition: background-color 0.3s ease;
}

body {
    min-height: 100vh;
    padding: 20px;
    color: var(--text-color);
    transition: color 0.3s ease;
}

/* Theme Toggle Button */
.theme-toggle {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* Theme Dropdown */
.theme-dropdown {
    position: fixed;
    top: 60px;
    right: 20px;
    background-color: var(--container-bg);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 1001;
    min-width: 80px;
    display: none;
}

.theme-dropdown.show {
    display: block !important;
    animation: dropdownFadeIn 0.2s ease;
}

.theme-option {
    padding: 8px 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-color);
    font-size: 14px;
}

.theme-option:hover {
    background-color: var(--accent-color);
    color: white;
}

.theme-option:first-child {
    border-radius: 4px 4px 0 0;
}

.theme-option:last-child {
    border-radius: 0 0 4px 4px;
}

@keyframes dropdownFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    overflow: visible;
}

/* Title Styles */
h1 {
    color: var(--accent-color);
    padding: 15px;
    text-align: center;
    border: 2px solid var(--border-color);
    margin-bottom: 20px;
    background-color: var(--container-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
}

/* Form Styles */
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Input Block Styles */
.input-block {
    background-color: var(--block-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.input-block:first-child {
    padding-top: 10px;
}

.input-block:nth-child(2),
.input-block:nth-child(3) {
    padding-top: 10px;
}

.input-block:hover {
    transform: translateY(-2px);
}

fieldset {
    border: none;
    padding: 20px;
}

legend {
    font-weight: bold;
    font-size: 16px;
    color: var(--text-color);
    margin-bottom: 15px;
    padding: 0 10px;
    transition: color 0.3s ease;
}

/* Radio Button Styles */
.radio-group {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
    align-items: center;
}

.radio-group input[type="radio"] {
    margin-right: 5px;
    transform: scale(1.2);
}

.radio-group label {
    font-size: 14px;
    color: var(--text-color);
    cursor: pointer;
    font-weight: 500;
    transition: color 0.3s ease;
}

.radio-group input[type="radio"]:checked + label {
    color: var(--accent-color);
    font-weight: bold;
}

/* Input Field Styles */
.input-wrapper {
    display: flex;
    flex-direction: column;
}

input[type="number"] {
    padding: 12px;
    border: 2px solid var(--input-border);
    border-radius: 6px;
    font-size: 16px;
    width: 100%;
    background-color: var(--input-bg);
    color: var(--text-color);
    transition: all 0.3s ease;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--input-border-focus);
    box-shadow: 0 0 5px rgba(128, 128, 192, 0.3);
}

input[type="number"]:invalid {
    border-color: var(--input-border-invalid);
}

input[type="number"]:valid {
    border-color: var(--input-border-valid);
}

/* Error Message Styles */
.error-message {
    color: var(--input-border-invalid);
    font-size: 12px;
    margin-top: 5px;
    min-height: 18px;
    transition: color 0.3s ease;
}

/* Submit Button Styles */
.submit-wrapper {
    text-align: center;
    margin-top: 20px;
}

button[type="submit"] {
    background-color: var(--button-bg);
    padding: 15px 40px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-color);
    text-transform: uppercase;
}

button[type="submit"]:hover:not(:disabled) {
    background-color: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

button[type="submit"]:disabled {
    background-color: var(--button-disabled);
    cursor: not-allowed;
    opacity: 0.6;
}

button[type="submit"]:active:not(:disabled) {
    transform: translateY(0);
}

/* Result Display Styles */
.result-display {
    background-color: var(--result-bg);
    border: 2px solid var(--result-border);
    border-radius: 8px;
    padding: 20px;
    margin-top: 20px;
    animation: slideIn 0.3s ease;
    transition: all 0.3s ease;
}

.result-display h2 {
    color: var(--result-text);
    margin-bottom: 15px;
    text-align: center;
    transition: color 0.3s ease;
}

.result-content {
    color: var(--result-text);
    font-size: 16px;
    line-height: 1.5;
    transition: color 0.3s ease;
}

.result-value {
    font-size: 24px;
    font-weight: bold;
    color: var(--accent-color);
    text-align: center;
    margin: 10px 0;
    padding: 10px;
    background-color: rgba(128, 128, 192, 0.1);
    border-radius: 6px;
    transition: all 0.3s ease;
}

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

/* Responsive Design */
@media (max-width: 600px) {
    .container {
        margin: 0 10px;
    }
    
    .radio-group {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    
    fieldset {
        padding: 15px;
    }
}

/* Loading State */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading button[type="submit"] {
    background-color: #ccc !important;
}

.loading button[type="submit"]:after {
    content: " ...";
}

/* Footer Styles */
.footer {
    margin-top: 40px;
    padding: 20px 0;
    border-top: 1px solid var(--footer-border);
    background-color: var(--footer-bg);
    transition: all 0.3s ease;
}

.footer-content {
    text-align: center;
    color: var(--footer-text);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: color 0.3s ease;
}

.footer-content .fas {
    color: var(--accent-color);
    font-size: 16px;
    transition: color 0.3s ease;
}

.footer-content .version {
    background-color: var(--accent-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
    margin-left: 5px;
    transition: background-color 0.3s ease;
}