/*
Theme Name: USA Home Tools
Theme URI: https://example.com/
Author: Antigravity
Author URI: https://example.com/
Description: Fast, SEO-optimized theme for home tools and calculators.
Version: 1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: usa-home-tools
*/

:root {
    /* Colors */
    --primary-color: #0f4c75; /* Deep Blue */
    --primary-light: #3282b8;
    --accent-color: #bbe1fa;
    --text-main: #1b262c;
    --text-light: #52616b;
    --bg-body: #f0f2f5;
    --bg-white: #ffffff;
    --border-color: #dde1e7;
    --success: #28a745;
    --error: #dc3545;

    /* Typography */
    --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.05);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--text-main);
    background-color: var(--bg-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    font-family: var(--font-heading);
    color: var(--text-main);
    line-height: 1.25;
}

h1 { font-size: 2.25rem; font-weight: 700; }
h2 { font-size: 1.75rem; font-weight: 600; margin-bottom: var(--spacing-sm); }
h3 { font-size: 1.25rem; font-weight: 600; }

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-light);
}

p {
    margin-bottom: var(--spacing-sm);
}

img {
    max-width: 100%;
    height: auto;
}

/* Layout */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.site-header {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo a {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.main-navigation ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: var(--spacing-md);
}

.main-navigation a {
    color: var(--text-main);
    font-weight: 500;
}

.main-navigation a:hover {
    color: var(--primary-color);
}

/* Footer */
.site-footer {
    background: #1b262c;
    color: #fff;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.site-footer a {
    color: #bbe1fa;
}

.footer-inner {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.footer-credits {
    text-align: center;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
}

/* Calculator Global Styles */
.calculator-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(15, 76, 117, 0.1);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    text-align: center;
}

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

.btn:active {
    transform: translateY(1px);
}

.result-box {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--accent-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    display: none; /* Hidden by default */
}

/* Utilities */
.text-center { text-align: center; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-md); }

/* Responsive */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}