/* =============================================
   GLOBAL STYLES - Homeworkhaven Unified Design
   ============================================= */

:root {
    /* Primary Colors */
    --primary-color: #1e3a8a;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    --accent-color: #04AC14;
    --accent-light: #22c55e;
    
    /* Neutral Colors */
    --white: #ffffff;
    --light-bg: #f8fafc;
    --light-gray: #e2e8f0;
    --gray: #64748b;
    --dark-gray: #475569;
    --dark: #1e293b;
    --dark-bg: #0f172a;
    
    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Font Sizes - Neater and Smaller */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Layout */
    --container-max: 1200px;
    --header-height: 70px;
    
    /* Effects */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 15px;
    --transition: all 0.25s ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
}

/* Typography - Cleaner and Neater */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--dark);
    margin-bottom: var(--space-sm);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-base); }
h6 { font-size: var(--text-sm); }

p {
    margin-bottom: var(--space-sm);
    color: var(--gray);
}

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

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

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* =============================================
   HEADER STYLES - Unified Across All Pages
   ============================================= */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    height: var(--header-height);
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 42px;
    width: auto;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    display: block;
    padding: 8px 14px;
    color: var(--dark);
    font-weight: 500;
    font-size: var(--text-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-color);
    background: rgba(4, 172, 20, 0.08);
}

.has-dropdown {
    position: relative;
}

.has-dropdown > .nav-link::after {
    content: '▾';
    margin-left: 4px;
    font-size: 10px;
}

.dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    background: var(--white);
    min-width: 190px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: 8px 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
}

.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown li a {
    display: block;
    padding: 10px 16px;
    color: var(--dark);
    font-size: var(--text-sm);
    transition: var(--transition);
}

.dropdown li a:hover {
    background: rgba(4, 172, 20, 0.08);
    color: var(--accent-color);
}

.btn-login {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    color: var(--white) !important;
    padding: 10px 18px !important;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--text-sm);
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(4, 172, 20, 0.35);
    color: var(--white);
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* Main Content Wrapper */
.main-content {
    padding-top: var(--header-height);
    min-height: 100vh;
}

/* Page Hero */
.page-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: var(--space-xl) 0;
    margin-bottom: var(--space-xl);
    position: relative;
}

.page-hero h1 {
    color: var(--white);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-xs);
}

.page-hero p {
    color: rgba(255,255,255,0.9);
    font-size: var(--text-lg);
    max-width: 600px;
}

/* =============================================
   FOOTER STYLES - Unified Across All Pages
   ============================================= */

.footer {
    background: var(--dark-bg);
    color: rgba(255,255,255,0.85);
    padding: var(--space-xl) 0 var(--space-md);
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-section h3,
.footer-section h4 {
    color: var(--white);
    font-size: var(--text-lg);
    margin-bottom: var(--space-sm);
}

.footer-section p {
    color: rgba(255,255,255,0.7);
    font-size: var(--text-sm);
    line-height: 1.7;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    font-size: var(--text-sm);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-light);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--space-md);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.5);
    font-size: var(--text-sm);
    margin: 0;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    background: var(--accent-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: var(--text-lg);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--accent-light);
    transform: translateY(-3px);
}

/* =============================================
   BUTTONS
   ============================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

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

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(4, 172, 20, 0.35);
}

/* =============================================
   CARDS
   ============================================= */

.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--light-gray);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

/* =============================================
   FORMS
   ============================================= */

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

.form-label {
    display: block;
    font-weight: 500;
    font-size: var(--text-sm);
    margin-bottom: 6px;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--text-base);
    border: 1px solid var(--light-gray);
    border-radius: var(--radius-md);
    background: var(--white);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 992px) {
    .mobile-toggle {
        display: flex;
    }
    
    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        heightvh - var: calc(100(--header-height));
        background: var(--white);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--space-md);
        transition: var(--transition);
        overflow-y: auto;
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }
    
    .nav-list > li {
        border-bottom: 1px solid var(--light-gray);
    }
    
    .nav-link {
        padding: 14px 10px;
    }
    
    .dropdown {
        position: static;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        background: var(--light-bg);
        margin: 0;
    }
    
    .has-dropdown:hover .dropdown,
    .has-dropdown .dropdown.active {
        display: block;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-lg);
    }
}

@media (max-width: 576px) {
    :root {
        --text-3xl: 1.5rem;
        --text-2xl: 1.25rem;
        --text-xl: 1.125rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .page-hero {
        padding: var(--space-lg) 0;
    }
}