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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
}

canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    width: 100%;
    max-width: 420px;
    padding: 40px;
    position: relative;
    z-index: 10;
    backdrop-filter: blur(5px);
}

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

.logo h1 {
    color: #2a5298;
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
}

.logo p {
    color: #6b7280;
    font-size: 14px;
}

h2 {
    text-align: center;
    color: #1f2937;
    margin-bottom: 30px;
    font-size: 24px;
    font-weight: 600;
}

form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    color: #374151;
    font-size: 14px;
    font-weight: 500;
}

input[type="text"],
input[type="password"] {
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.2s;
    outline: none;
}

input[type="text"]:focus,
input[type="password"]:focus {
    border-color: #2a5298;
    box-shadow: 0 0 0 3px rgba(42, 82, 152, 0.1);
}

button {
    padding: 14px;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 10px;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(30, 60, 114, 0.3);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.switch-link {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid #e5e7eb;
}

.switch-link p {
    color: #6b7280;
    font-size: 14px;
    margin-bottom: 8px;
}

.switch-link a {
    color: #2a5298;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.switch-link a:hover {
    color: #1e3c72;
    text-decoration: underline;
}

.error {
    background: #fee2e2;
    color: #dc2626;
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
    display: none;
    border: 1px solid #fecaca;
}

.success {
    background: #d1fae5;
    color: #059669;
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
    display: none;
    border: 1px solid #a7f3d0;
}

.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

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