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

:root {
    --primary-color: #007AFF;
    --primary-dark: #0051D5;
    --primary-light: #5AC8FA;
    --secondary-color: #5856D6;
    --accent-color: #FF2D55;
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --text-tertiary: #AEAEB2;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F7;
    --bg-tertiary: #FAFAFA;
    --bg-dark: #000000;
    --border-color: #D2D2D7;
    --border-light: #E5E5EA;
    --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.24);
    --shadow-2xl: 0 24px 96px rgba(0, 0, 0, 0.32);
    --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%);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.47059;
    font-weight: 400;
    letter-spacing: -0.022em;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* Navigation Bar - Premium Professional */
.navbar {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 0.5px solid rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 52px;
}

.logo {
    display: flex;
    align-items: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo:hover::after {
    width: 100%;
}

.logo:hover {
    transform: translateY(-1px);
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-img {
    height: 22px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
    display: block;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.022em;
}

.nav-menu {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
    gap: 4px;
}

.nav-menu li {
    position: relative;
}

.nav-link {
    display: block;
    padding: 0 18px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 400;
    letter-spacing: -0.01em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    height: 36px;
    display: flex;
    align-items: center;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.1), rgba(90, 200, 250, 0.1));
    opacity: 0;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover::before {
    opacity: 1;
}

.nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-1px);
}

/* Dropdown Menu - Premium */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
}

.dropdown:hover .nav-link,
.dropdown.active .nav-link {
    color: var(--primary-color);
    background: rgba(0, 122, 255, 0.08);
}

.dropdown:hover .dropdown-menu,
.dropdown.active .dropdown-menu {
    display: block;
    animation: slideDownFade 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: saturate(180%) blur(30px);
    -webkit-backdrop-filter: saturate(180%) blur(30px);
    min-width: 240px;
    box-shadow: var(--shadow-xl), 0 0 0 0.5px rgba(0, 0, 0, 0.05);
    border-radius: 14px;
    list-style: none;
    padding: 8px;
    z-index: 1001;
    border: 0.5px solid rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.dropdown-menu::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    opacity: 0.3;
}

.dropdown-menu li {
    width: 100%;
}

.dropdown-menu a {
    display: block;
    padding: 12px 16px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
    position: relative;
}

.dropdown-menu a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--primary-color);
    border-radius: 0 2px 2px 0;
    transition: height 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.dropdown-menu a:hover {
    background: linear-gradient(90deg, rgba(0, 122, 255, 0.08), rgba(0, 122, 255, 0.04));
    color: var(--primary-color);
    padding-left: 20px;
}

.dropdown-menu a:hover::before {
    height: 60%;
}

.chevron {
    font-size: 10px;
    opacity: 0.5;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
}

.dropdown:hover .chevron {
    transform: rotate(180deg);
    opacity: 1;
}

/* Login Button - Premium */
.login-btn {
    background: var(--primary-color);
    color: white;
    border-radius: 22px;
    font-weight: 500;
    font-size: 13px;
    padding: 0 24px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.25);
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.login-btn:hover::before {
    width: 300px;
    height: 300px;
}

.login-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
}

.login-btn:active {
    transform: translateY(0);
}

/* Hero Section - Premium Professional */
.hero {
    background: linear-gradient(135deg, #007AFF 0%, #5AC8FA 50%, #5856D6 100%);
    background-size: 200% 200%;
    animation: gradientShift 20s ease infinite;
    color: white;
    padding: 140px 20px;
    text-align: center;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
    animation: rotate 30s linear infinite;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(180deg, rgba(0, 0, 0, 0.05) 0%, transparent 50%),
        linear-gradient(0deg, rgba(0, 0, 0, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes slideDownFade {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    animation: fadeInUp 1s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: 64px;
    line-height: 1.0625;
    font-weight: 700;
    letter-spacing: -0.008em;
    margin-bottom: 16px;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    background: linear-gradient(180deg, #ffffff 0%, rgba(255, 255, 255, 0.9) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleGlow 3s ease-in-out infinite;
}

@keyframes titleGlow {
    0%, 100% { filter: drop-shadow(0 0 20px rgba(255, 255, 255, 0.3)); }
    50% { filter: drop-shadow(0 0 30px rgba(255, 255, 255, 0.5)); }
}

.hero-subtitle {
    font-size: 24px;
    line-height: 1.333;
    font-weight: 400;
    margin-bottom: 48px;
    opacity: 0.95;
    letter-spacing: 0.011em;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    text-decoration: none;
    border-radius: 24px;
    font-weight: 500;
    font-size: 17px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: -0.022em;
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1), height 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.btn:hover::before {
    width: 400px;
    height: 400px;
}

.btn-primary {
    background-color: white;
    color: var(--primary-color);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.btn-primary:active {
    transform: translateY(-1px) scale(1.01);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: white;
    border: 1.5px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.btn-secondary:active {
    transform: translateY(-1px) scale(1.01);
}

/* Features Section - Premium */
.features {
    padding: 120px 20px;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.section-title {
    text-align: center;
    font-size: 56px;
    line-height: 1.07143;
    font-weight: 700;
    letter-spacing: -0.005em;
    margin-bottom: 80px;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--bg-primary);
    padding: 56px 40px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    border: 0.5px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.feature-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-2xl);
    border-color: var(--primary-color);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-icon {
    font-size: 56px;
    margin-bottom: 24px;
    display: inline-block;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.feature-card:hover .feature-icon {
    transform: scale(1.15) rotate(5deg) translateY(-4px);
    filter: drop-shadow(0 8px 16px rgba(0, 122, 255, 0.3));
}

.feature-card h3 {
    font-size: 28px;
    line-height: 1.14286;
    font-weight: 700;
    letter-spacing: -0.003em;
    margin-bottom: 16px;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.feature-card:hover h3 {
    color: var(--primary-color);
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
    font-size: 17px;
}

.feature-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 17px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.feature-link::after {
    content: '→';
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
}

.feature-link:hover {
    color: var(--primary-dark);
    gap: 12px;
}

.feature-link:hover::after {
    transform: translateX(6px) scale(1.2);
}

/* Footer - Premium */
.footer {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 80px 20px 40px;
    margin-top: 120px;
    position: relative;
    border-top: 0.5px solid var(--border-color);
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.footer-section p {
    margin-bottom: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 14px;
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
    position: relative;
}

.footer-section ul li a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary-color);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    transform: translateX(4px);
}

.footer-section ul li a:hover::after {
    width: 100%;
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 0.5px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 12px;
}

/* Page Sections */
.page-section {
    padding: 120px 20px;
    min-height: 70vh;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
}

.page-title {
    text-align: center;
    font-size: 56px;
    line-height: 1.07143;
    font-weight: 700;
    letter-spacing: -0.005em;
    margin-bottom: 60px;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    width: 100%;
}

.page-title::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* Form Styles - Premium */
.form-container {
    max-width: 520px;
    margin: 0 auto;
    background: var(--bg-primary);
    padding: 56px;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    border: 0.5px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.form-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.registration-form,
.login-form {
    width: 100%;
}

.form-group {
    margin-bottom: 28px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 14px;
    letter-spacing: -0.01em;
}

.form-group input {
    width: 100%;
    padding: 16px 18px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 17px;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1), var(--shadow-sm);
    transform: translateY(-1px);
}

.form-group input[type="submit"],
.form-container .btn {
    width: 100%;
    margin-top: 12px;
}

/* Content Box - Premium */
.content-box {
    max-width: 840px;
    margin: 0 auto;
    background: var(--bg-primary);
    padding: 56px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    border: 0.5px solid var(--border-light);
    position: relative;
}

.content-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.content-box h2 {
    color: var(--text-primary);
    margin-top: 40px;
    margin-bottom: 20px;
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.003em;
}

.content-box p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
    font-size: 17px;
}

.service-list {
    list-style: none;
    padding-left: 0;
}

.service-list li {
    padding: 14px 0;
    padding-left: 36px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 17px;
    transition: all 0.3s ease;
}

.service-list li:hover {
    color: var(--text-primary);
    transform: translateX(4px);
}

.service-list li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 20px;
    transition: transform 0.3s ease;
}

.service-list li:hover:before {
    transform: scale(1.2) rotate(5deg);
}

.forum-info {
    margin-top: 40px;
}

/* Auth Pages - Professional Design */
.auth-section {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
}

.auth-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(102, 126, 234, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(118, 75, 162, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.auth-container {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.auth-wrapper {
    background: var(--bg-primary);
    border-radius: 24px;
    box-shadow: var(--shadow-2xl);
    border: 0.5px solid var(--border-light);
    overflow: hidden;
    position: relative;
}

.auth-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.auth-header {
    text-align: center;
    padding: 24px 32px 16px;
    background: linear-gradient(180deg, rgba(102, 126, 234, 0.03) 0%, transparent 100%);
}

.auth-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 12px;
    background: var(--gradient-primary);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.auth-title {
    font-size: 28px;
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.003em;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.auth-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.auth-form-container {
    padding: 0 32px 24px;
}

.auth-form {
    margin-bottom: 12px;
}

.form-group {
    margin-bottom: 16px;
    position: relative;
}

.form-label {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 13px;
    letter-spacing: -0.01em;
}

.label-icon {
    font-size: 16px;
    opacity: 0.7;
}

.password-input-wrapper {
    position: relative;
}

.form-input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
}

.form-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
    transform: translateY(-1px);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

.input-focus-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 2px;
}

.form-input:focus ~ .input-focus-line {
    width: 100%;
}

.input-hint {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-tertiary);
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s ease;
    z-index: 2;
}

.password-toggle:hover {
    color: var(--primary-color);
}

.eye-icon {
    transition: transform 0.3s ease;
}

.password-toggle.active .eye-icon {
    transform: scale(1.1);
}

.password-strength {
    margin-top: 8px;
}

.strength-bar {
    height: 3px;
    background: var(--border-light);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 4px;
}

.strength-fill {
    height: 100%;
    width: 0;
    background: var(--gradient-primary);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.strength-fill.weak {
    width: 33%;
    background: linear-gradient(90deg, #ff2d55, #ff6b6b);
}

.strength-fill.medium {
    width: 66%;
    background: linear-gradient(90deg, #ff9500, #ffb340);
}

.strength-fill.strong {
    width: 100%;
    background: linear-gradient(90deg, #34c759, #30d158);
}

.strength-text {
    font-size: 11px;
    color: var(--text-tertiary);
}

.password-match {
    display: block;
    margin-top: 4px;
    font-size: 11px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.password-match.match {
    color: #34c759;
}

.password-match.mismatch {
    color: #ff2d55;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.checkbox-wrapper input[type="checkbox"] {
    display: none;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    flex-shrink: 0;
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkbox-custom {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkbox-custom::after {
    content: '✓';
    color: white;
    font-size: 14px;
    font-weight: 700;
}

.checkbox-label {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.checkbox-group {
    margin-bottom: 16px;
}

.link-inline {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.link-inline:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.forgot-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.forgot-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.btn-auth {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -0.01em;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-auth.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.4);
}

.btn-auth.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.5);
}

.btn-auth.btn-primary:active {
    transform: translateY(0);
}

.btn-loader {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.btn-auth.loading .btn-text {
    opacity: 0;
}

.btn-auth.loading .btn-loader {
    display: block;
}

.auth-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 32px 0;
    color: var(--text-tertiary);
    font-size: 13px;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-light);
}

.auth-divider span {
    padding: 0 16px;
}

.social-login {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 32px;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 16px;
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.social-btn:hover {
    border-color: var(--primary-color);
    background: rgba(0, 122, 255, 0.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.social-btn svg {
    flex-shrink: 0;
}

.google-btn:hover {
    border-color: #4285F4;
    background: rgba(66, 133, 244, 0.05);
}

.github-btn:hover {
    border-color: #24292e;
    background: rgba(36, 41, 46, 0.05);
}

.auth-footer {
    text-align: center;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.auth-footer p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.auth-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-left: 4px;
}

.auth-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 44px;
        line-height: 1.1;
    }

    .hero-subtitle {
        font-size: 20px;
    }

    .nav-container {
        flex-direction: column;
        align-items: flex-start;
        height: auto;
        padding: 16px 24px;
    }

    .logo {
        width: 100%;
        padding-bottom: 16px;
        border-bottom: 0.5px solid rgba(0, 0, 0, 0.1);
    }

    .nav-menu {
        flex-direction: column;
        width: 100%;
        align-items: stretch;
        margin-top: 12px;
        gap: 4px;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-link {
        width: 100%;
        margin: 0;
    }

    .dropdown-menu {
        position: static;
        display: none;
        width: 100%;
        border-radius: 12px;
        margin-top: 8px;
    }

    .dropdown:hover .dropdown-menu {
        display: block;
    }

    .login-btn {
        width: 100%;
        text-align: center;
        margin: 4px 0;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .form-container,
    .content-box {
        padding: 40px 28px;
    }

    .page-title,
    .section-title {
        font-size: 36px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .feature-card {
        padding: 40px 32px;
    }

    /* Auth Pages Responsive */
    .auth-section {
        padding: 40px 20px;
    }

    .auth-container {
        max-width: 100%;
    }

    .auth-header {
        padding: 40px 24px 24px;
    }

    .auth-icon {
        width: 64px;
        height: 64px;
        margin-bottom: 20px;
    }

    .auth-title {
        font-size: 28px;
    }

    .auth-subtitle {
        font-size: 14px;
    }

    .auth-form-container {
        padding: 0 24px 32px;
    }

    .social-login {
        grid-template-columns: 1fr;
    }

    .form-options {
        flex-direction: column;
        align-items: flex-start;
    }

    .forgot-link {
        margin-top: 8px;
    }
}