:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --input-bg: rgba(255, 255, 255, 0.03);
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    overflow: hidden;
}

/* Background Animation */
body::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
    animation: rotate 20s linear infinite;
    z-index: -1;
}

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

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
    position: relative;
    z-index: 1;
}

.login-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
}

.login-card:hover {
    transform: translateY(-5px);
}

.logo-wrapper {
    text-align: center;
    margin-bottom: 30px;
}

.logo-wrapper img {
    max-width: 160px;
    filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.3));
}

h2 {
    font-size: 1.8rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 8px;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 35px;
}

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

.form-group label {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    transition: all 0.3s ease;
    pointer-events: none;
    font-size: 0.95rem;
}

.form-control {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 16px;
    color: #fff;
    font-size: 1rem;
    transition: all 0.3s ease;
    outline: none;
    box-sizing: border-box;
}

.form-control:focus {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.07);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-control:focus + label,
.form-control:not(:placeholder-shown) + label {
    top: -10px;
    left: 12px;
    font-size: 0.8rem;
    background: #1e1b4b;
    padding: 0 8px;
    color: var(--primary);
}

.btn-login {
    width: 100%;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 12px;
    padding: 16px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.3);
}

.btn-login:hover {
    background: var(--primary-hover);
    transform: scale(1.02);
    box-shadow: 0 20px 25px -5px rgba(99, 102, 241, 0.4);
}

.extra-links {
    display: flex;
    justify-content: space-between;
    margin-top: 25px;
    font-size: 0.9rem;
}

.extra-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.alert {
    padding: 12px 16px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

/* Custom Checkbox */
.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 25px;
    cursor: pointer;
    user-select: none;
    color: var(--text-muted);
    font-size: 0.9rem;
}

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