/* Dark Theme CSS - Modern & Lightweight */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --text-primary: #e4e4e4;
    --text-secondary: #b8b8b8;
    --accent: #4a90e2;
    --accent-hover: #5aa0f2;
    --accent-dark: #357abd;
    --border: #2a2a3e;
    --border-focus: #4a90e2;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
    --success: #4caf50;
    --error: #f44336;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    min-height: 100vh;
    padding: 40px 20px;
    max-width: 650px;
    margin: 0 auto;
    animation: fadeIn 0.5s ease-in;
}

h1 {
    color: var(--text-primary);
    margin-bottom: 30px;
    font-size: 2.5em;
    font-weight: 700;
    text-align: center;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

p {
    margin-bottom: 15px;
    color: var(--text-secondary);
}

a {
    color: var(--accent);
    text-decoration: none;
    display: inline-block;
    margin: 8px 0;
    padding: 12px 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
    width: 100%;
    text-align: center;
}

a:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

/* Form Styles */
form {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 8px 32px var(--shadow-lg);
    margin-top: 30px;
    border: 1px solid var(--border);
}

.field {
    margin-bottom: 24px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 16px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
input[type="password"]::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-primary);
    box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.1);
}

button[type="submit"] {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
    padding: 14px 32px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    width: 100%;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

button[type="submit"]:hover {
    background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.4);
}

button[type="submit"]:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(74, 144, 226, 0.3);
}

/* Messages */
div {
    margin: 15px 0;
    padding: 14px 18px;
    border-radius: 8px;
    background: var(--bg-tertiary);
    border-left: 4px solid var(--accent);
    color: var(--text-primary);
    font-weight: 500;
}

/* Remove default br spacing issues */
br {
    display: none;
}

/* Fade in animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Additional improvements */
button[type="submit"]:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    body {
        padding: 20px 15px;
    }
    
    h1 {
        font-size: 2em;
    }
    
    form {
        padding: 30px 20px;
    }
}