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

:root {
    --primary: #00ff88; /* Matrix green */
    --primary-dark: #00cc6a;
    --secondary: #7b61ff; /* Purple accent */
    --accent: #ff6b6b; /* Red accent */
    --success: #00ff88;
    --danger: #ff4757;
    --warning: #ffa502;
    --info: #2ed573;
    
    /* Dark theme colors */
    --dark-bg: #0a0a0f;
    --darker-bg: #050508;
    --card-bg: #111118;
    --card-border: #22222e;
    --text-primary: #e0e0ff;
    --text-secondary: #a0a0c0;
    --text-muted: #707090;
    
    /* Hacker effects */
    --glow: rgba(0, 255, 136, 0.1);
    --glow-strong: rgba(0, 255, 136, 0.2);
    --grid-color: rgba(0, 255, 136, 0.05);
    
    /* Sizes */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --sidebar-width: 280px;
    --header-height: 60px;
}

body {
    font-family: 'Inter', 'JetBrains Mono', 'SF Mono', monospace;
    background: var(--dark-bg);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        linear-gradient(0deg, transparent 24%, var(--grid-color) 25%, var(--grid-color) 26%, transparent 27%, transparent 74%, var(--grid-color) 75%, var(--grid-color) 76%, transparent 77%, transparent),
        linear-gradient(90deg, transparent 24%, var(--grid-color) 25%, var(--grid-color) 26%, transparent 27%, transparent 74%, var(--grid-color) 75%, var(--grid-color) 76%, transparent 77%, transparent);
    background-size: 50px 50px;
}

/* Matrix effect overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        var(--glow) 2%,
        transparent 4%
    );
    opacity: 0.1;
    pointer-events: none;
    z-index: 9999;
    animation: scan 8s linear infinite;
}

@keyframes scan {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 0.5px;
}

p {
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Selection */
::selection {
    background: var(--primary);
    color: var(--dark-bg);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--darker-bg);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Auth Pages */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    background: var(--dark-bg);
    position: relative;
    overflow: hidden;
}

.auth-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(123, 97, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(255, 107, 107, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.auth-container {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-xl);
    box-shadow: 
        0 10px 40px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(0, 255, 136, 0.1),
        0 0 30px rgba(0, 255, 136, 0.05);
    width: 100%;
    max-width: 440px;
    overflow: hidden;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
}

.auth-container::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--primary), var(--secondary), var(--accent));
    border-radius: calc(var(--border-radius-xl) + 2px);
    z-index: -1;
    opacity: 0.1;
}

.auth-header {
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.1), rgba(123, 97, 255, 0.1));
    color: var(--text-primary);
    padding: 40px 30px 30px;
    text-align: center;
    border-bottom: 1px solid var(--card-border);
    position: relative;
    overflow: hidden;
}

.auth-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.back-home {
    position: absolute;
    top: 20px;
    left: 20px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s;
    z-index: 2;
}

.back-home:hover {
    color: var(--primary);
    text-shadow: 0 0 10px var(--primary);
}

.auth-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.auth-brand i {
    font-size: 32px;
    color: var(--primary);
    text-shadow: 0 0 15px var(--primary);
}

.auth-brand h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-header p {
    opacity: 0.9;
    font-size: 15px;
    color: var(--text-secondary);
}

.auth-form {
    padding: 40px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    z-index: 1;
}

.input-with-icon input {
    width: 100%;
    padding: 14px 16px 14px 45px;
    background: var(--darker-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: all 0.3s;
    color: var(--text-primary);
    font-family: inherit;
    position: relative;
}

.input-with-icon input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 
        0 0 0 3px var(--glow),
        0 0 20px rgba(0, 255, 136, 0.1);
    background: var(--card-bg);
}

.input-with-icon input::placeholder {
    color: var(--text-muted);
}

.show-password {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 5px;
    transition: color 0.3s;
}

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

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-secondary);
}

.checkbox input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

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

.forgot-link:hover {
    color: var(--primary-dark);
    text-shadow: 0 0 10px var(--primary);
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-login, .btn-signup {
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
    border: none;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 14px;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary), var(--primary-dark));
    color: var(--dark-bg);
    padding: 16px 30px;
    border-radius: var(--border-radius);
    box-shadow: 
        0 4px 15px rgba(0, 255, 136, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 20px rgba(0, 255, 136, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

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

.btn-primary::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;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: 15px 30px;
    border-radius: var(--border-radius);
}

.btn-secondary:hover {
    background: var(--glow);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 255, 136, 0.1);
}

.btn-block {
    width: 100%;
}

.auth-footer {
    text-align: center;
    margin-top: 30px;
    color: var(--text-muted);
    font-size: 14px;
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
}

.auth-footer a:hover {
    text-shadow: 0 0 10px var(--primary);
}

/* Message boxes */
.message-box {
    padding: 15px 20px;
    border-radius: var(--border-radius);
    margin: 20px;
    display: none;
    border: 1px solid;
    backdrop-filter: blur(10px);
}

.message-box.success {
    background: rgba(0, 255, 136, 0.1);
    color: var(--success);
    border-color: rgba(0, 255, 136, 0.3);
}

.message-box.error {
    background: rgba(255, 71, 87, 0.1);
    color: var(--danger);
    border-color: rgba(255, 71, 87, 0.3);
}

/* Home Page */
.navbar {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
    border-bottom: 1px solid var(--card-border);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-brand i {
    color: var(--primary);
    text-shadow: 0 0 15px var(--primary);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
    padding: 8px 0;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-auth {
    display: flex;
    gap: 15px;
}

.btn-login, .btn-signup {
    padding: 10px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-login {
    color: var(--text-primary);
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.05);
}

.btn-login:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-signup {
    background: linear-gradient(45deg, var(--primary), var(--primary-dark));
    color: var(--dark-bg);
    border: 1px solid var(--primary);
}

.btn-signup:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 255, 136, 0.3);
}

/* Hero Section */
.hero {
    max-width: 1400px;
    margin: 0 auto;
    padding: 150px 20px 100px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--text-primary), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    padding: 10px 20px;
    border-radius: 50px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 255, 136, 0.1);
}

.feature i {
    color: var(--primary);
    font-size: 14px;
}

/* Chat Preview */
.chat-preview {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-xl);
    padding: 25px;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(0, 255, 136, 0.1);
    transform: perspective(1000px) rotateY(-5deg);
    backdrop-filter: blur(10px);
}

.message {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.message .avatar {
    width: 36px;
    height: 36px;
    background: var(--darker-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 1px solid var(--card-border);
}

.message.user .avatar {
    background: linear-gradient(45deg, var(--primary), var(--primary-dark));
    color: var(--dark-bg);
    border: none;
}

.message.ai .avatar {
    background: var(--secondary);
    color: var(--dark-bg);
    border: none;
}

.message .content {
    flex: 1;
}

.message.ai .content pre {
    background: var(--darker-bg);
    color: var(--text-primary);
    padding: 15px;
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin-top: 10px;
    border: 1px solid var(--card-border);
}

/* Features Section */
.section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 80px 20px;
}

.section h2 {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 50px;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--border-radius-xl);
    text-align: center;
    transition: all 0.3s;
    border: 1px solid var(--card-border);
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(0, 255, 136, 0.2);
    border-color: var(--primary);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity 0.3s;
}

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

.feature-card i {
    font-size: 40px;
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px;
    color: var(--text-muted);
    border-top: 1px solid var(--card-border);
    background: var(--darker-bg);
}

/* Responsive */
@media (max-width: 1200px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 120px 20px 60px;
    }
    
    .hero-content h1 {
        font-size: 42px;
    }
    
    .chat-preview {
        transform: none;
        max-width: 600px;
        margin: 0 auto;
    }
    
    .hero-features {
        justify-content: center;
    }
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 15px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn-login, .btn-signup {
        width: 100%;
        text-align: center;
    }
    
    .feature {
        width: 100%;
        justify-content: center;
    }
    
    .section {
        padding: 60px 20px;
    }
    
    .section h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .auth-form {
        padding: 30px 20px;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .nav-brand span {
        font-size: 20px;
    }
}