:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --background: #0f172a;
    --surface: rgba(30, 41, 59, 0.7);
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --error: #ef4444;
    --border: rgba(255, 255, 255, 0.1);
    --input-bg: rgba(15, 23, 42, 0.5);
    --radius: 12px;
    --font-inter: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font-inter);
    background-color: var(--background);
    color: var(--text);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Background */
body {
    font-family: var(--font-inter);
    background-color: var(--background);
    color: var(--text);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Login Container */
.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-card {
    background: var(--surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    padding: 10px;
    border-radius: 12px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-header h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-muted);
    font-size: 14px;
}

/* Form Styles */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.forgot-password {
    font-size: 12px;
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

.forgot-password:hover {
    color: var(--primary-hover);
}

input[type="text"],
input[type="password"] {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px;
    color: var(--text);
    font-family: inherit;
    font-size: 16px;
    transition: all 0.2s;
}

input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.form-options {
    display: flex;
    align-items: center;
}

.checkbox-container {
    display: flex;
    align-items: center;
    position: relative;
    padding-left: 28px;
    cursor: pointer;
    font-size: 14px;
    user-select: none;
    color: var(--text-muted);
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 18px;
    width: 18px;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    transition: all 0.2s;
}

.checkbox-container:hover input ~ .checkmark {
    border-color: var(--primary);
}

.checkbox-container input:checked ~ .checkmark {
    background-color: var(--primary);
    border-color: var(--primary);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

#login-button {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

#login-button:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

#login-button:active {
    transform: translateY(0);
}

#login-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--error);
    padding: 12px;
    border-radius: var(--radius);
    font-size: 14px;
    text-align: center;
    margin-top: 20px;
}

.hidden {
    display: none !important;
}

.login-footer {
    margin-top: 32px;
    text-align: center;
}

.login-footer p {
    font-size: 14px;
    color: var(--text-muted);
}

.login-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.login-footer a:hover {
    text-decoration: underline;
}

/* Spinner */
.spinner {
    width: 20px;
    height: 20px;
    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); }
}

/* Responsive */
@media (max-width: 480px) {
    .login-card {
        padding: 30px 24px;
    }
}