/* Mobile First - Base styles for mobile devices are in style.css and components.css */

/* Small devices (landscape phones, 640px and up) */
@media (max-width: 640px) {
    /* Container */
    .container {
        padding: 0 var(--space-md);
    }

    /* Typography */
    h1 {
        font-size: var(--font-size-3xl);
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

    h3 {
        font-size: var(--font-size-xl);
    }

    /* Header layout for mobile - hamburger on right */
    .header-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    /* Improved Navigation */
    .mobile-menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 24px;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 0;
        z-index: 1001;
        position: relative;
        min-width: 44px !important;
        min-height: 44px !important;
        margin-left: auto;
    }

    .mobile-menu-toggle span {
        display: block;
        height: 3px;
        width: 100%;
        background: var(--primary);
        border-radius: 3px;
        transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        transform-origin: center;
    }

    /* Hover effect */
    .mobile-menu-toggle:hover span {
        background: var(--accent);
    }

    /* Active/Open state */
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: translateY(10.5px) rotate(45deg);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: translateY(-10.5px) rotate(-45deg);
    }

    nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background-color: var(--bg);
        box-shadow: 2px 0 20px rgba(0, 0, 0, 0.1);
        transition: left 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        padding: 80px var(--space-xl) var(--space-xl);
        overflow-y: auto;
        z-index: 1000;
    }

    nav.active {
        left: 0;
    }

    .nav-menu {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .nav-menu li {
        margin: 0;
        border-bottom: 1px solid var(--border);
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .nav-menu a {
        display: block;
        width: 100%;
        padding: var(--space-md) 0;
        font-size: var(--font-size-lg);
        min-height: 48px;
        display: flex;
        align-items: center;
    }

    /* Mobile dropdown styles */
    .nav-menu .has-dropdown {
        position: relative;
    }

    .nav-menu .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        box-shadow: none;
        background-color: var(--bg-gray);
        margin: var(--space-xs) 0 0 var(--space-lg);
        padding: var(--space-xs) 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }

    .nav-menu .has-dropdown.active .dropdown-menu {
        max-height: 500px;
    }

    .nav-menu .dropdown-menu a {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-sm);
    }

    .nav-menu .dropdown-arrow {
        margin-left: auto;
    }

    /* Hero */
    .hero {
        padding: var(--space-2xl) 0;
    }

    .hero h2 {
        font-size: var(--font-size-2xl);
    }

    .hero p {
        font-size: var(--font-size-base);
    }

    /* Sections */
    section {
        padding: var(--space-2xl) 0;
    }

    .page-header {
        padding: var(--space-xl) 0;
    }

    /* Cards */
    .card-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    /* Buttons */
    .btn {
        width: 100%;
        display: block;
    }

    .btn + .btn {
        margin-top: var(--space-md);
    }

    /* Calculator button accessibility - ensure minimum touch target size */
    /* WCAG 2.5.5 requires minimum 44x44px touch targets on mobile */
    .calculator-step button,
    .calculator-navigation button,
    #calculator-form button,
    .calculator-actions button,
    .btn {
        min-width: 44px !important;
        min-height: 44px !important;
        padding: var(--space-md) var(--space-lg);
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    /* Navigation buttons specifically */
    .calculator-navigation {
        display: flex;
        gap: var(--space-md);
        flex-wrap: wrap;
    }

    .calculator-navigation button {
        flex: 1 1 auto;
        min-width: 44px;
        min-height: 44px;
    }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 640px) and (max-width: 768px) {
    /* Header layout for mobile - hamburger on right */
    .header-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    /* Navigation */
    .mobile-menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 24px;
        min-width: 44px !important;
        min-height: 44px !important;
        margin-left: auto;
    }

    .mobile-menu-toggle span {
        display: block;
        height: 3px;
        width: 100%;
        background: var(--primary);
        border-radius: 3px;
        transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    }

    .mobile-menu-toggle:hover span {
        background: var(--accent);
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: translateY(10.5px) rotate(45deg);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: translateY(-10.5px) rotate(-45deg);
    }

    nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 320px;
        height: 100vh;
        background-color: var(--bg);
        box-shadow: 2px 0 20px rgba(0, 0, 0, 0.1);
        transition: left 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        padding: 80px var(--space-xl) var(--space-xl);
        overflow-y: auto;
        z-index: 1000;
    }

    nav.active {
        left: 0;
    }

    .nav-menu {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .nav-menu li {
        margin: 0;
        border-bottom: 1px solid var(--border);
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .nav-menu a {
        display: block;
        width: 100%;
        padding: var(--space-md) 0;
        font-size: var(--font-size-lg);
        min-height: 48px;
        display: flex;
        align-items: center;
    }

    /* Mobile dropdown styles */
    .nav-menu .has-dropdown {
        position: relative;
    }

    .nav-menu .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        box-shadow: none;
        background-color: var(--bg-gray);
        margin: var(--space-xs) 0 0 var(--space-lg);
        padding: var(--space-xs) 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }

    .nav-menu .has-dropdown.active .dropdown-menu {
        max-height: 500px;
    }

    .nav-menu .dropdown-menu a {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-sm);
    }

    .nav-menu .dropdown-arrow {
        margin-left: auto;
    }

    /* Cards */
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Large devices (desktops, 1024px and up) */
@media (min-width: 768px) and (max-width: 1024px) {
    /* Navigation - show normal menu */
    .nav-menu {
        gap: var(--space-sm);
    }

    .nav-menu a {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-sm);
    }

    /* Cards */
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Extra large devices (large desktops, 1280px and up) */
@media (min-width: 1024px) {
    /* Cards */
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Overlay for mobile menu */
.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.nav-overlay.active {
    display: block;
    opacity: 1;
}

/* Print styles */
@media print {
    header,
    footer,
    .mobile-menu-toggle,
    .btn {
        display: none;
    }

    body {
        font-size: 12pt;
    }

    a {
        text-decoration: underline;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --primary: #1E3A8A;
        --text: #000000;
        --bg: #FFFFFF;
    }

    .btn,
    .card {
        border: 2px solid var(--text);
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Dark mode (optional for future implementation) */
@media (prefers-color-scheme: dark) {
    /* Uncomment to enable dark mode
    :root {
        --text: #F9FAFB;
        --bg: #111827;
        --bg-gray: #1F2937;
        --bg-dark: #000000;
        --border: #374151;
    }

    .card {
        background-color: var(--bg-gray);
    }
    */
}