/* CSS Variables for Theming */
:root {
    --color-bg: #f9fafb;
    --color-text: #111827;
    --color-subtext: #4b5563;
    --color-primary: #16a34a;
    --color-primary-hover: #15803d;
    --color-accent-bg: #dcfce7;
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

/* Dark Theme Variables */
body.theme-dark {
    --color-bg: #111827;
    --color-text: #f9fafb;
    --color-subtext: #9ca3af;
    --color-primary: #10b981;
    --color-primary-hover: #059669;
    --color-accent-bg: #064e3b;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    color: var(--color-subtext);
}

/* Utility Classes */
.text-primary { color: var(--color-primary); }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Main content area - grows to fill available space */
main {
    flex: 1 0 auto;
}

/* Global alerts */
.alert {
    padding: 0.875rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.alert-with-action {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.alert-message {
    min-width: 0;
}

.alert-error {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
}

.alert-success {
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
}

.alert-warning {
    background-color: #fffbeb;
    border: 1px solid #fde68a;
    color: #92400e;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 0.5rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text);
    border-color: var(--color-gray-300);
}

.btn-outline:hover {
    background-color: var(--color-gray-50);
    border-color: var(--color-gray-400);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.03);
}

.btn-compact {
    padding: 0.375rem 0.625rem;
    font-size: 0.75rem;
    line-height: 1.2;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Navigation */
.navbar {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.nav-logo a {
    text-decoration: none;
    color: var(--color-text);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.logo-subtitle {
    font-size: 0.875rem;
    color: var(--color-subtext);
    margin-left: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-auth {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.plan-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
}

.plan-badge-free {
    background-color: #f3f4f6;
    color: #374151;
    border: 1px solid #d1d5db;
}

.plan-badge-pro {
    background-color: #ecfdf3;
    color: #166534;
    border: 1px solid #bbf7d0;
}

/* Profile Dropdown */
.profile-dropdown {
    position: relative;
}

.profile-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

.profile-toggle:hover {
    transform: scale(1.05);
}

.profile-toggle:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: 50%;
}

.profile-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    box-shadow: var(--shadow-md);
    transition: all 0.2s ease;
}

.profile-avatar:hover {
    box-shadow: var(--shadow-lg);
}

.profile-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-xl);
    min-width: 200px;
    padding: 0.5rem;
    display: none;
    flex-direction: column;
    z-index: 1000;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.profile-dropdown.active .profile-dropdown-menu {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.profile-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--color-text);
    text-decoration: none;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    font-weight: 500;
}

.profile-dropdown-item:hover {
    background-color: var(--color-gray-50);
    color: var(--color-primary);
}

.profile-dropdown-item svg {
    flex-shrink: 0;
    color: var(--color-gray-600);
    transition: color 0.2s ease;
}

.profile-dropdown-item:hover svg {
    color: var(--color-primary);
}

.profile-dropdown-item-danger {
    color: #dc2626;
}

.profile-dropdown-item-danger:hover {
    background-color: #fef2f2;
    color: #b91c1c;
}

.profile-dropdown-item-danger svg {
    color: #dc2626;
}

.profile-dropdown-item-danger:hover svg {
    color: #b91c1c;
}

.profile-dropdown-divider {
    height: 1px;
    background-color: var(--color-gray-200);
    margin: 0.5rem 0;
}

.mobile-menu-toggle {
    display: none;
    position: relative;
    width: 2.75rem;
    height: 2.75rem;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    border-radius: 0.5rem;
    -webkit-tap-highlight-color: transparent;
}

.mobile-menu-toggle span {
    position: absolute;
    left: 50%;
    width: 1.25rem;
    height: 2px;
    margin-left: -0.625rem;
    background-color: var(--color-text);
    border-radius: 1px;
    transition: transform 0.25s ease, opacity 0.25s ease, top 0.25s ease;
}

.mobile-menu-toggle span:nth-child(1) {
    top: 0.8125rem;
}

.mobile-menu-toggle span:nth-child(2) {
    top: 1.3125rem;
}

.mobile-menu-toggle span:nth-child(3) {
    top: 1.8125rem;
}

.mobile-menu-toggle.is-open span:nth-child(1),
.mobile-menu-toggle.is-open span:nth-child(3) {
    top: 1.3125rem;
}

.mobile-menu-toggle.is-open span:nth-child(1) {
    transform: rotate(45deg);
}

.mobile-menu-toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.is-open span:nth-child(3) {
    transform: rotate(-45deg);
}

.mobile-menu-toggle:hover {
    background-color: var(--color-gray-100);
}

.mobile-menu {
    display: none;
}

.mobile-nav-divider {
    height: 1px;
    background-color: var(--color-gray-200);
    margin: 0.5rem 0;
}

.mobile-plan-badge-wrap {
    padding: 0.75rem 0 0.25rem;
}

/* Footer */
.footer {
    background-color: var(--color-gray-900);
    color: var(--color-white);
    padding: 3rem 0 1rem;
    flex-shrink: 0;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--color-gray-400);
    margin-bottom: 0;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    color: var(--color-white);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--color-gray-400);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-section a:hover {
    color: var(--color-white);
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-800);
    padding-top: 2rem;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: var(--color-gray-400);
    margin: 0;
}

.footer-legal {
    display: flex;
    gap: 2rem;
}

.footer-legal a {
    color: var(--color-gray-400);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

.footer-legal a:hover {
    color: var(--color-white);
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Navigation */
    .nav-links,
    .nav-auth {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-container {
        padding: 0 1.5rem;
    }

    /* Footer */
    .footer {
        padding: 2.5rem 0 1rem;
    }
    
    .footer-container {
        padding: 0 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-bottom: 1.5rem;
    }
    
    .footer-brand h3 {
        font-size: 1.5rem;
    }
    
    .footer-brand p {
        font-size: 0.95rem;
        line-height: 1.5;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .footer-section h4 {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }
    
    .footer-section a {
        font-size: 0.9rem;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .footer-legal {
        justify-content: center;
        gap: 1.5rem;
    }
    
    .footer-legal a {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    /* Extra small screens */
    .nav-container {
        padding: 0 1rem;
        height: 3.5rem;
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
    
    .logo-subtitle {
        font-size: 0.75rem;
    }

    .footer {
        padding: 2rem 0 1rem;
    }
    
    .footer-container {
        padding: 0 1rem;
    }
    
    .footer-brand h3 {
        font-size: 1.375rem;
    }
    
    .footer-brand p {
        font-size: 0.9rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    
    .footer-section h4 {
        font-size: 0.95rem;
    }
    
    .footer-section a {
        font-size: 0.85rem;
    }
    
    .footer-legal {
        gap: 1rem;
    }
    
    .footer-legal a {
        font-size: 0.75rem;
    }
}

/* Mobile navigation drawer */
@media (max-width: 768px) {
    .mobile-menu {
        position: fixed;
        inset: 0;
        z-index: 9999;
        display: none;
        align-items: stretch;
        justify-content: flex-start;
        padding: 0;
        background-color: rgba(17, 24, 39, 0.45);
        backdrop-filter: blur(2px);
        -webkit-backdrop-filter: blur(2px);
    }

    .mobile-menu.active {
        display: flex;
    }

    .mobile-menu-content {
        position: relative;
        display: flex;
        flex-direction: column;
        width: min(300px, 88vw);
        height: 100%;
        background-color: var(--color-white);
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
        transform: translateX(-100%);
        transition: transform 0.28s ease;
        overflow: hidden;
    }

    .mobile-menu.active .mobile-menu-content {
        transform: translateX(0);
    }

    .mobile-menu-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-shrink: 0;
        padding: 1rem 1rem 0.875rem;
        border-bottom: 1px solid var(--color-gray-200);
    }

    .mobile-menu-title {
        font-size: 1.125rem;
        font-weight: 600;
        color: var(--color-text);
        letter-spacing: -0.01em;
    }

    .mobile-menu-close {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 2.5rem;
        height: 2.5rem;
        padding: 0;
        margin: 0;
        border: none;
        border-radius: 0.5rem;
        background-color: var(--color-gray-100);
        color: var(--color-text);
        cursor: pointer;
        line-height: 1;
        flex-shrink: 0;
        transition: background-color 0.2s ease, color 0.2s ease;
    }

    .mobile-menu-close svg {
        display: block;
        width: 1.25rem;
        height: 1.25rem;
    }

    .mobile-menu-close:hover {
        background-color: var(--color-gray-200);
        color: var(--color-text);
    }

    .mobile-menu-nav {
        flex: 1;
        overflow-y: auto;
        padding: 0.5rem 1rem 1.5rem;
        -webkit-overflow-scrolling: touch;
    }

    .mobile-nav-link {
        display: flex;
        align-items: center;
        min-height: 2.75rem;
        padding: 0.625rem 0.75rem;
        margin-bottom: 0.125rem;
        border-radius: 0.5rem;
        border-bottom: none;
        text-decoration: none;
        color: var(--color-text);
        font-weight: 500;
        font-size: 1rem;
        line-height: 1.3;
        transition: background-color 0.2s ease, color 0.2s ease;
    }

    .mobile-nav-link:hover,
    .mobile-nav-link:focus-visible {
        background-color: var(--color-gray-50);
        color: var(--color-primary);
    }

    .mobile-nav-link-primary {
        margin-top: 0.5rem;
        background-color: var(--color-primary);
        color: var(--color-white);
        justify-content: center;
        font-weight: 600;
    }

    .mobile-nav-link-primary:hover,
    .mobile-nav-link-primary:focus-visible {
        background-color: var(--color-primary-hover);
        color: var(--color-white);
    }

    .mobile-nav-link-danger {
        color: #b91c1c;
    }

    .mobile-nav-link-danger:hover,
    .mobile-nav-link-danger:focus-visible {
        background-color: #fef2f2;
        color: #991b1b;
    }

    .mobile-nav-divider {
        margin: 0.75rem 0;
    }

    .mobile-plan-badge-wrap {
        padding: 0.5rem 0.75rem 0.25rem;
    }

    .mobile-plan-badge-wrap .plan-badge {
        width: 100%;
        justify-content: center;
        text-align: center;
    }
}

/* Touch improvements */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 44px;
        padding: 0.875rem 1.5rem;
    }
    
    .nav-link {
        padding: 0.5rem;
    }
    
    .mobile-nav-link {
        min-height: 44px;
    }

    .mobile-menu-close {
        min-width: 44px;
        min-height: 44px;
    }

    .mobile-menu-toggle {
        min-width: 44px;
        min-height: 44px;
    }
}

/* Performance optimizations */
* {
    -webkit-tap-highlight-color: transparent;
}

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

/* Prevent horizontal scroll on mobile */
html, body {
    overflow-x: hidden;
}

/* Smooth scrolling */
html {
    height: 100%;
    scroll-behavior: smooth;
    zoom: 0.85;
}

/* Focus styles for accessibility */
.btn:focus,
.nav-link:focus,
.mobile-nav-link:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Prevent zoom on input focus (iOS) */
@media screen and (max-width: 768px) {
    input, select, textarea {
        font-size: 16px;
    }
}

:disabled {
    opacity: 0.5 !important;
    cursor: not-allowed !important;
    pointer-events: none !important;
  }