:root {
    /* CALM GREEN PALETTE */
    --primary-green: #059669; 
    --dark-green: #064e3b;
    --success-green: #10b981;
}

body {
    font-family: 'Inter', sans-serif;
    /* Updated to the soft, deep emerald radial gradient */
    background: radial-gradient(circle at center, #065f46 0%, #022c22 100%);
    min-height: 100vh;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    width: 100%;
    padding: 24px 0;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    color: white;
    text-align: center;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.container {
    /* Dark Glassmorphism Effect */
    background: rgba(255, 255, 255, 0.08); 
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 48px;
    border-radius: 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    width: 90%;
    max-width: 450px;
    margin: 60px 0;
    text-align: center;
    color: white;
}

h2 { 
    color: white; 
    margin-bottom: 8px; 
    font-size: 1.8rem; 
    font-weight: 700;
    letter-spacing: -0.025em;
}

p { 
    color: rgba(255, 255, 255, 0.6); 
    margin-bottom: 30px; 
    font-size: 0.95rem;
}

input {
    width: 100%;
    padding: 16px;
    margin-bottom: 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    box-sizing: border-box;
    font-size: 1rem;
    color: white;
    transition: all 0.3s ease;
}

input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

input:focus { 
    background: rgba(255, 255, 255, 0.1);
    border-color: #34d399; /* Emerald focus border */
    box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.1);
    outline: none; 
}

.register-btn {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 12px;
    background: white;
    color: var(--dark-green); /* Text matches theme */
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 10px;
}

.register-btn:hover { 
    background: #f0fdf4; 
    transform: translateY(-2px); 
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
}

.login-link {
    display: inline-block;
    margin-top: 24px;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
}

.login-link b { 
    color: #6ee7b7; /* Minty link color */
    text-decoration: underline;
}

/* Message Styling */
.msg {
    padding: 14px;
    border-radius: 12px;
    font-size: 0.9rem;
    margin-bottom: 24px;
    border: 1px solid;
    text-align: left;
}

.error { 
    background: rgba(6, 78, 59, 0.6); 
    color: #d1fae5; 
    border-color: rgba(16, 185, 129, 0.3); 
}

.success { 
    background: rgba(16, 185, 129, 0.2); 
    color: #a7f3d0; 
    border-color: rgba(52, 211, 153, 0.4); 
}