/* Global Styles - Pwdmancer.com */
:root {
    /* Primary Colors */
    --primary-color: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;

    /* Secondary Colors */
    --secondary-color: #7c3aed;
    --secondary-light: #8b5cf6;
    --secondary-dark: #6d28d9;

    /* Accent Colors */
    --accent-color: #06b6d4;
    --accent-light: #22d3ee;
    --accent-dark: #0891b2;

    /* Neutral Colors */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;

    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-dark: #111827;
    --bg-card: #ffffff;

    /* Status Colors */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #3b82f6;

    /* Border Colors */
    --border-light: #e5e7eb;
    --border-medium: #d1d5db;
    --border-dark: #374151;

    /* Gradient Colors */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-tech: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 5rem;
    --spacing-5xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-base);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.tool-desc:nth-of-type(1) p {
    color: #fff !important;
}

/* 涟漪动画效果 */
@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-family-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-tech);
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: var(--font-size-base);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn:disabled:hover {
    transform: none;
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: var(--z-fixed);
    transition: var(--transition-normal);
}

.navbar {
    padding: 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    transition: var(--transition-normal);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-lg);
    position: relative;
}

.nav-logo:hover {
    transform: translateY(-2px);
    background: rgba(37, 99, 235, 0.05);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.logo-icon {
    height: 40px;
    width: 40px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.nav-logo:hover .logo-icon {
    filter: drop-shadow(0 4px 8px rgba(37, 99, 235, 0.2));
    transform: scale(1.05);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    background: linear-gradient(135deg, #1f2937, #374151, #2563eb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
    margin: 0;
    transition: var(--transition-fast);
}

.logo-subtitle {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin: 0;
    margin-top: 2px;
    transition: var(--transition-fast);
}

.nav-logo:hover .logo-title {
    background: linear-gradient(135deg, #2563eb, #7c3aed, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Footer Logo Styles */
.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.footer-logo-icon {
    height: 36px;
    width: 36px;
    filter: brightness(1.1) drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    flex-shrink: 0;
}

.footer-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.footer-logo-title {
    font-size:1.2rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.025em;
    margin: 0;
}

.footer-logo-subtitle {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin: 0;
    margin-top: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
}

.nav-link i {
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.15);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-tech);
    transition: var(--transition-normal);
    border-radius: 1px;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 3px;
}

.nav-toggle .bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition-fast);
    border-radius: var(--radius-sm);
}

/* Footer Styles */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
}

.footer-description {
    color: #9ca3af;
    margin-bottom: var(--spacing-lg);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--text-white);
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    color: var(--text-white);
}

.footer-title {
    color: var(--text-white);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: #9ca3af;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid #374151;
}

.footer-copyright {
    color: #9ca3af;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-legal a {
    color: #9ca3af;
    font-size: var(--font-size-sm);
}

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

/* Utility Classes */
.gradient-text {
    background: var(--gradient-tech);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-auto {
    margin-top: auto;
}

.mb-auto {
    margin-bottom: auto;
}

.hidden {
    display: none;
}

.visible {
    display: block;
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-light);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Card Components */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-normal);
}

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

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-medium);
    border-radius: var(--radius-md);
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-medium);
    border-radius: var(--radius-md);
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    background: var(--bg-primary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    /* 优化移动端导航栏 */
    .nav-container {
        padding: 0.75rem var(--spacing-md);
        position: relative;
    }

    /* 移动端菜单样式优化 */
    .nav-menu {
        position: fixed;
        height: 100vh;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.98) 0%, rgba(29, 78, 216, 0.98) 100%);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: 6rem var(--spacing-xl) var(--spacing-3xl);
        transform: translateX(100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        gap: var(--spacing-lg);
        z-index: 9999;
        backdrop-filter: blur(20px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nav-menu.active {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }

    /* 移动端导航链接优化 */
    .nav-link {
        padding: 1rem 1.5rem;
        border-radius: var(--radius-xl);
        justify-content: flex-start;
        gap: 1rem;
        font-size: 1.1rem;
        font-weight: 600;
        color: white;
        background: rgba(255, 255, 255, 0.12);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.2);
        width: 100%;
        max-width: 280px;
        text-align: left;
        transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        transform: translateY(30px);
        opacity: 0;
        position: relative;
        overflow: hidden;
    }

    /* 添加涟漪效果 */
    .nav-link::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        transition: left 0.5s;
    }

    .nav-link:hover::before {
        left: 100%;
    }

    /* 动画延迟优化 */
    .nav-menu.active .nav-link:nth-child(1) {
        animation: slideInUp 0.6s ease forwards 0.1s;
    }

    .nav-menu.active .nav-link:nth-child(2) {
        animation: slideInUp 0.6s ease forwards 0.2s;
    }

    .nav-menu.active .nav-link:nth-child(3) {
        animation: slideInUp 0.6s ease forwards 0.3s;
    }

    .nav-menu.active .nav-link:nth-child(4) {
        animation: slideInUp 0.6s ease forwards 0.4s;
    }

    .nav-menu.active .nav-link:nth-child(5) {
        animation: slideInUp 0.6s ease forwards 0.5s;
    }

    .nav-link:hover,
    .nav-link.active {
        background: rgba(255, 255, 255, 0.25);
        transform: translateY(0) translateX(8px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
        border-color: rgba(255, 255, 255, 0.4);
    }

    .nav-link i {
        font-size: 1.2rem;
        width: 28px;
        text-align: center;
        flex-shrink: 0;
    }

    .nav-link span {
        flex: 1;
    }

    .nav-link::after {
        display: none;
    }

    /* 优化动画效果 */
    @keyframes slideInUp {
        to {
            transform: translateY(0);
            opacity: 1;
        }
    }

    /* 汉堡菜单按钮优化 */
    .nav-toggle {
        display: flex;
        z-index: 10000;
        position: relative;
        padding: 0.75rem;
        border-radius: var(--radius-lg);
        transition: all var(--transition-fast);
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(37, 99, 235, 0.2);
        cursor: pointer;
    }

    .nav-toggle:hover {
        background: rgba(37, 99, 235, 0.15);
        transform: scale(1.05);
    }

    .nav-toggle.active {
        position: fixed;
        top: 1rem;
        right: 1rem;
        background: rgba(255, 255, 255, 0.2);
        backdrop-filter: blur(10px);
    }

    .nav-toggle .bar {
        width: 24px;
        height: 3px;
        background: var(--text-primary);
        transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        border-radius: 2px;
    }

    .nav-toggle.active .bar {
        background: white;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
        transform: scale(0);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

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

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

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

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    /* 小屏幕导航优化 */
    .nav-container {
        padding: 0.5rem var(--spacing-sm);
    }

    .logo-icon {
        height: 36px;
        width: 36px;
    }

    .logo-title {
        font-size: 1rem;
    }

    .nav-toggle {
        padding: 0.5rem;
    }

    .nav-toggle .bar {
        width: 20px;
        height: 2px;
    }

    .nav-menu {
        padding: 5rem var(--spacing-md) var(--spacing-2xl);
        gap: var(--spacing-md);
    }

    .nav-link {
        padding: 0.875rem 1.25rem;
        font-size: 1rem;
        max-width: 260px;
    }

    .nav-link i {
        font-size: 1.1rem;
        width: 24px;
    }

    .social-links {
        justify-content: center;
    }

    h1 {
        font-size: var(--font-size-2xl);
    }

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

    .btn {
        padding: 0.625rem 1.25rem;
        font-size: var(--font-size-xs);
    }

    .btn-large {
        padding: 0.875rem 1.75rem;
        font-size: var(--font-size-sm);
    }
}

/* Print Styles */
@media print {

    .header,
    .footer,
    .nav-toggle,
    .btn {
        display: none !important;
    }

    body {
        background: white !important;
        color: black !important;
    }

    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
    .header {
        background: rgba(17, 24, 39, 0.95);
        border-bottom-color: #374151;
    }

    .nav-menu {
        background: var(--bg-dark);
    }
}

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

/* Focus Styles for Accessibility */
button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 移动端触摸优化 */
@media (hover: none) and (pointer: coarse) {
    .nav-link:hover {
        background: rgba(255, 255, 255, 0.12);
        transform: none;
    }

    .nav-link:active {
        background: rgba(255, 255, 255, 0.25);
        transform: scale(0.98);
    }

    .nav-toggle:hover {
        background: rgba(37, 99, 235, 0.1);
        transform: none;
    }

    .nav-toggle:active {
        background: rgba(37, 99, 235, 0.2);
        transform: scale(0.95);
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .nav-link {
        border: 2px solid rgba(255, 255, 255, 0.8);
        background: rgba(0, 0, 0, 0.8);
    }

    .nav-toggle .bar {
        background: var(--text-primary);
        height: 4px;
    }
}

/* 减少动画模式 */
@media (prefers-reduced-motion: reduce) {
    .nav-menu {
        transition: opacity 0.2s ease;
    }

    .nav-link {
        animation: none !important;
        transition: background-color 0.2s ease;
    }

    .nav-toggle .bar {
        transition: transform 0.2s ease;
    }
}