* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: #0f172a;
    color: #f8fafc;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

.background-animation {
    position: absolute;
    width: 150vw;
    height: 150vh;
    background: radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.15) 0%, rgba(15, 23, 42, 1) 50%);
    animation: pulse 15s infinite alternate;
    z-index: 0;
}

@keyframes pulse {
    0% { transform: scale(1) translate(0, 0); }
    50% { transform: scale(1.1) translate(2%, 2%); }
    100% { transform: scale(1) translate(-2%, -2%); }
}

.container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.auth-card {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    opacity: 0;
    animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeUp {
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #a78bfa 0%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-card h2 {
    font-size: 28px;
    font-weight: 500;
    margin-bottom: 8px;
    color: #f1f5f9;
}

.auth-card p {
    font-size: 14px;
    color: #94a3b8;
    margin-bottom: 32px;
    line-height: 1.5;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: #cbd5e1;
    margin-bottom: 8px;
}

.input-group input {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 14px 16px;
    color: #f8fafc;
    font-size: 15px;
    transition: all 0.2s ease;
    outline: none;
}

.input-group input:focus {
    border-color: #8b5cf6;
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 32px;
}

.btn {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    outline: none;
    position: relative;
}

.btn-primary {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
}

.btn-primary:active {
    transform: translateY(1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #e2e8f0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.error-message {
    color: #ef4444;
    font-size: 13px;
    margin-top: 16px;
    min-height: 20px;
    text-align: center;
    opacity: 0;
    transform: translateY(-5px);
    transition: all 0.3s ease;
}

.error-message.show {
    opacity: 1;
    transform: translateY(0);
}

.loading {
    color: transparent !important;
    pointer-events: none;
}

.loading::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 20px;
    height: 20px;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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