/*
Theme Name: Math Solver Pro
Theme URI: https://example.com/mathsolver
Author: Math Solver Team
Author URI: https://example.com
Description: A comprehensive WordPress theme for solving mathematical equations across multiple categories including Algebra, Geometry, Trigonometry, and more. Features auto-generated solver pages, shortcodes, and a mobile-friendly interface.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: mathsolver
Tags: education, math, calculator, responsive, mobile-friendly
*/

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4A90E2;
    --secondary-color: #7B68EE;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
    --warning-color: #f39c12;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --border-radius: 8px;
    --transition: all 0.3s ease;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --box-shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--gray-100);
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   HEADER STYLES
   ============================================ */
.site-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 1rem 0;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.site-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0;
}

.site-title a {
    color: var(--white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.site-description {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-top: 5px;
}

/* ============================================
   NAVIGATION STYLES
   ============================================ */
.main-navigation {
    background: var(--white);
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 70px;
    z-index: 999;
}

.main-navigation ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    padding: 0;
    margin: 0;
}

.main-navigation li {
    position: relative;
}

.main-navigation a {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--dark-color);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.main-navigation a:hover,
.main-navigation .current-menu-item > a {
    background-color: var(--primary-color);
    color: var(--white);
}

/* Dropdown Menu */
.main-navigation .sub-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    box-shadow: var(--box-shadow);
    min-width: 250px;
    z-index: 1000;
}

.main-navigation li:hover > .sub-menu {
    display: block;
}

.main-navigation .sub-menu li {
    width: 100%;
}

.main-navigation .sub-menu a {
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    font-size: 1rem;
    border-radius: var(--border-radius);
    margin: 10px;
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */
.site-main {
    padding: 2rem 0;
    min-height: calc(100vh - 300px);
}

/* Solver Categories Grid */
.solver-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.solver-category-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    cursor: pointer;
    border-top: 4px solid var(--primary-color);
}

.solver-category-card:hover {
    box-shadow: var(--box-shadow-hover);
    transform: translateY(-5px);
}

.solver-category-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.solver-category-card ul {
    list-style: none;
    padding-left: 0;
}

.solver-category-card li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.solver-category-card li:last-child {
    border-bottom: none;
}

.solver-category-card a {
    color: var(--dark-color);
    text-decoration: none;
    transition: var(--transition);
    display: block;
}

.solver-category-card a:hover {
    color: var(--primary-color);
    padding-left: 10px;
}

/* ============================================
   SOLVER INTERFACE
   ============================================ */
.solver-container {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
}

.solver-header {
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.solver-header h1 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.solver-description {
    color: var(--gray-600);
    font-size: 1rem;
    line-height: 1.8;
}

/* Input Section */
.solver-input-section {
    margin-bottom: 2rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.input-group input,
.input-group textarea,
.input-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.input-group input:focus,
.input-group textarea:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.input-helper {
    font-size: 0.85rem;
    color: var(--gray-600);
    margin-top: 0.5rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
    text-decoration: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-hover);
}

.btn-secondary {
    background: var(--gray-500);
    color: var(--white);
}

.btn-secondary:hover {
    background: var(--gray-600);
}

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

.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Results Section */
.solver-results {
    margin-top: 2rem;
    padding: 2rem;
    background: var(--gray-100);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--success-color);
}

.solver-results.error {
    border-left-color: var(--error-color);
    background: #fee;
}

.solver-results h3 {
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.result-item {
    padding: 1rem;
    background: var(--white);
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.result-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: 700;
}

.step-by-step {
    margin-top: 1.5rem;
}

.step {
    padding: 1rem;
    background: var(--white);
    margin-bottom: 1rem;
    border-left: 3px solid var(--primary-color);
    border-radius: var(--border-radius);
}

.step-number {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* ============================================
   FOOTER STYLES
   ============================================ */
.site-footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-content {
    text-align: center;
}

.footer-links {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media screen and (max-width: 768px) {
    .site-title {
        font-size: 1.4rem;
    }

    .menu-toggle {
        display: block;
    }

    .main-navigation {
        position: relative;
        top: 0;
    }

    .main-navigation ul {
        display: none;
        flex-direction: column;
        width: 100%;
    }

    .main-navigation.toggled ul {
        display: flex;
    }

    .main-navigation li {
        width: 100%;
    }

    .main-navigation a {
        padding: 1rem;
        border-bottom: 1px solid var(--gray-200);
    }

    .main-navigation .sub-menu {
        position: relative;
        box-shadow: none;
        background: var(--gray-100);
    }

    .solver-categories {
        grid-template-columns: 1fr;
    }

    .solver-container {
        padding: 1rem;
    }

    .solver-header h1 {
        font-size: 1.5rem;
    }

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

    .btn {
        width: 100%;
    }
}

@media screen and (max-width: 480px) {
    body {
        font-size: 14px;
    }

    .site-title {
        font-size: 1.2rem;
    }

    .solver-header h1 {
        font-size: 1.3rem;
    }
}

/* ============================================
   LOADING & ANIMATIONS
   ============================================ */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-300);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

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

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.hidden { display: none; }
.visible { display: block; }