:root {
    --space-black: #0a0e27;
    --deep-space: #1a1f3a;
    --nebula-purple: #6b46c1;
    --cosmic-blue: #00d9ff;
    --star-white: #e8f4f8;
    --solar-orange: #ff6b35;
    --mars-red: #ff2e63;
    --grid-glow: rgba(0, 217, 255, 0.15);
}

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

body {
    font-family: 'Rajdhani', sans-serif;
    background: var(--space-black);
    color: var(--star-white);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Animated space background */
.space-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(107, 70, 193, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 217, 255, 0.1) 0%, transparent 50%),
        linear-gradient(180deg, var(--space-black) 0%, var(--deep-space) 100%);
}

/* Grid overlay */
.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background-image: 
        linear-gradient(var(--grid-glow) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-glow) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

/* Stars */
.stars {
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--star-white);
    border-radius: 50%;
    animation: twinkle 3s infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* Main container */
.container {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* Logo */
.logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 48px;
    font-weight: 900;
    text-align: center;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--cosmic-blue), var(--nebula-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 4px;
    position: relative;
    z-index: 1;
}

.tagline {
    text-align: center;
    color: var(--cosmic-blue);
    font-size: 14px;
    letter-spacing: 3px;
    margin-bottom: 40px;
    text-transform: uppercase;
    position: relative;
    z-index: 1;
}

/* Buttons */
.btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, var(--cosmic-blue), var(--nebula-purple));
    border: none;
    border-radius: 10px;
    color: var(--star-white);
    font-family: 'Orbitron', sans-serif;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.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;
}

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

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.4);
}

.btn span {
    position: relative;
    z-index: 1;
}

/* Form elements */
.form-group {
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
}

label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--cosmic-blue);
    font-weight: 600;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 15px 20px;
    background: rgba(10, 14, 39, 0.6);
    border: 1px solid rgba(0, 217, 255, 0.3);
    border-radius: 10px;
    color: var(--star-white);
    font-family: 'Rajdhani', sans-serif;
    font-size: 16px;
    transition: all 0.3s ease;
}

input[type="text"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--cosmic-blue);
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
    background: rgba(10, 14, 39, 0.8);
}

/* Error messages */
.error {
    background: rgba(255, 46, 99, 0.2);
    border: 1px solid var(--mars-red);
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    color: var(--mars-red);
    font-weight: 600;
    animation: shake 0.5s;
    position: relative;
    z-index: 1;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.success {
    background: rgba(0, 217, 255, 0.2);
    border: 1px solid var(--cosmic-blue);
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    color: var(--cosmic-blue);
    font-weight: 600;
    position: relative;
    z-index: 1;
}

/* Demo info */
.demo-info {
    margin-top: 20px;
    padding: 15px;
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid var(--solar-orange);
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.demo-info strong {
    color: var(--solar-orange);
}