:root {
    --primary-color: #202020;
    --secondary-color: #0085FF;
    --accent-color: #FFCC5D;
    --bg-light: #F8F9FA;
    --border-color: rgba(32, 32, 32, 0.08);
    --text-muted: rgba(32, 32, 32, 0.45);
    --card-shadow: 0 20px 60px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(0, 0, 0, 0.06);
    --input-shadow: 0 2px 8px rgba(0, 133, 255, 0.12);
    --transition: all 0.25s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-light);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: -30%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 133, 255, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    bottom: -20%;
    left: -15%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 204, 93, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.login-wrapper {
    width: 100%;
    max-width: 420px;
    padding: 1.5rem;
    position: relative;
    z-index: 1;
}

.login-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 2.5rem 2.25rem;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

/* Header */
.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--secondary-color);
    border-radius: 16px;
    margin-bottom: 1rem;
    position: relative;
}

.login-logo::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 60%);
}

.login-logo .bi {
    font-size: 1.75rem;
    color: #ffffff;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    margin-bottom: 0.25rem;
}

.login-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 400;
    margin: 0;
}

/* Error alert */
.alert-error {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(220, 53, 69, 0.06);
    border: 1px solid rgba(220, 53, 69, 0.2);
    color: #dc3545;
    border-radius: 10px;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

.alert-error .bi {
    font-size: 1rem;
    flex-shrink: 0;
}

/* Form */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    letter-spacing: 0.3px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 0.9rem;
    color: var(--text-muted);
    font-size: 1rem;
    pointer-events: none;
    transition: var(--transition);
}

.form-input {
    width: 100%;
    height: 48px;
    padding: 0 2.75rem 0 2.5rem;
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    font-size: 0.9rem;
    font-family: 'Poppins', sans-serif;
    color: var(--primary-color);
    background: var(--bg-light);
    transition: var(--transition);
    outline: none;
}

.form-input::placeholder {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.form-input:focus {
    border-color: var(--secondary-color);
    background: #ffffff;
    box-shadow: var(--input-shadow);
}

.form-input:focus + .input-icon,
.input-wrapper:focus-within .input-icon {
    color: var(--secondary-color);
}

.toggle-password {
    position: absolute;
    right: 0.9rem;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    font-size: 1rem;
    transition: var(--transition);
}

.toggle-password:hover {
    color: var(--secondary-color);
}

/* Login button */
.btn-login {
    width: 100%;
    height: 48px;
    margin-top: 0.5rem;
    background: var(--secondary-color);
    color: #ffffff;
    border: none;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-login::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 60%);
}

.btn-login:hover {
    background: #0075e0;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 133, 255, 0.35);
}

.btn-login:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* Footer */
.login-footer {
    text-align: center;
    margin-top: 1.75rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
}

.login-footer p {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
}

/* Responsive */
@media (max-width: 480px) {
    .login-card {
        padding: 2rem 1.5rem;
        border-radius: 16px;
    }
}